/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:43:12,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:43:12,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:43:12,115 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:43:12,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:43:12,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:43:12,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:43:12,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:43:12,143 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:43:12,143 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:43:12,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:43:12,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:43:12,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:43:12,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:43:12,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:43:12,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:43:12,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:43:12,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:43:12,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:43:12,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:43:12,177 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 02:43:12,204 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:43:12,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:43:12,206 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:43:12,206 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:43:12,206 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:43:12,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:43:12,207 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:43:12,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:43:12,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:43:12,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:43:12,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:43:12,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:43:12,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:43:12,208 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:43:12,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:43:12,208 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:43:12,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:43:12,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:43:12,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:43:12,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:43:12,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:43:12,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:43:12,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:43:12,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:43:12,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:43:12,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:43:12,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:43:12,210 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:43:12,210 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:43:12,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:43:12,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:43:12,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:43:12,458 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:43:12,458 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:43:12,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2021-05-06 02:43:12,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d82b1645c/cb7e9c716a55402aaf00abd522481cad/FLAG4d89ad37c [2021-05-06 02:43:12,886 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:43:12,887 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2021-05-06 02:43:12,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d82b1645c/cb7e9c716a55402aaf00abd522481cad/FLAG4d89ad37c [2021-05-06 02:43:12,905 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d82b1645c/cb7e9c716a55402aaf00abd522481cad [2021-05-06 02:43:12,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:43:12,909 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:43:12,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:43:12,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:43:12,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:43:12,915 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:43:12" (1/1) ... [2021-05-06 02:43:12,916 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e9ed431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:12, skipping insertion in model container [2021-05-06 02:43:12,916 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:43:12" (1/1) ... [2021-05-06 02:43:12,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:43:12,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:43:13,039 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c[524,537] [2021-05-06 02:43:13,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:43:13,062 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:43:13,092 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c[524,537] [2021-05-06 02:43:13,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:43:13,124 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:43:13,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:13 WrapperNode [2021-05-06 02:43:13,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:43:13,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:43:13,127 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:43:13,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:43:13,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:13" (1/1) ... [2021-05-06 02:43:13,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:13" (1/1) ... [2021-05-06 02:43:13,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:13" (1/1) ... [2021-05-06 02:43:13,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:13" (1/1) ... [2021-05-06 02:43:13,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:13" (1/1) ... [2021-05-06 02:43:13,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:13" (1/1) ... [2021-05-06 02:43:13,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:13" (1/1) ... [2021-05-06 02:43:13,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:43:13,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:43:13,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:43:13,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:43:13,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:43:13,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:43:13,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:43:13,221 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:43:13,221 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:43:13,221 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:43:13,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:43:13,221 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:43:13,221 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:43:13,221 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:43:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:43:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:43:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:43:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:43:13,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:43:13,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:43:13,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:43:13,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:43:13,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:43:13,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:43:13,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:43:13,448 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:43:13,449 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:43:13,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:43:13 BoogieIcfgContainer [2021-05-06 02:43:13,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:43:13,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:43:13,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:43:13,453 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:43:13,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:43:12" (1/3) ... [2021-05-06 02:43:13,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc7b1c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:43:13, skipping insertion in model container [2021-05-06 02:43:13,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:13" (2/3) ... [2021-05-06 02:43:13,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dc7b1c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:43:13, skipping insertion in model container [2021-05-06 02:43:13,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:43:13" (3/3) ... [2021-05-06 02:43:13,456 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound100.c [2021-05-06 02:43:13,460 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:43:13,462 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:43:13,472 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:43:13,494 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:43:13,494 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:43:13,494 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:43:13,494 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:43:13,495 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:43:13,495 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:43:13,495 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:43:13,495 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:43:13,505 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 02:43:13,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 02:43:13,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:13,509 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:13,509 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2021-05-06 02:43:13,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:13,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932335668] [2021-05-06 02:43:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:13,601 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:13,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912013502] [2021-05-06 02:43:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:43:13,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 02:43:13,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-06 02:43:13,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:13,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932335668] [2021-05-06 02:43:13,770 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:13,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912013502] [2021-05-06 02:43:13,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912013502] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:43:13,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:43:13,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 02:43:13,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858582824] [2021-05-06 02:43:13,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 02:43:13,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:13,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 02:43:13,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 02:43:13,786 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:43:13,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:13,802 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2021-05-06 02:43:13,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 02:43:13,803 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 02:43:13,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:13,808 INFO L225 Difference]: With dead ends: 53 [2021-05-06 02:43:13,808 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 02:43:13,810 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 02:43:13,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 02:43:13,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 02:43:13,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:43:13,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-06 02:43:13,835 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-06 02:43:13,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:13,835 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-06 02:43:13,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:43:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-06 02:43:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:43:13,837 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:13,837 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:14,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 02:43:14,054 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:14,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:14,055 INFO L82 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2021-05-06 02:43:14,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:14,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447469178] [2021-05-06 02:43:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:14,065 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:14,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506824432] [2021-05-06 02:43:14,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:43:14,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:43:14,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:14,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:14,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:14,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:14,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:14,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:14,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:43:14,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:14,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447469178] [2021-05-06 02:43:14,212 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:14,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506824432] [2021-05-06 02:43:14,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506824432] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:43:14,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:43:14,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:43:14,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114830545] [2021-05-06 02:43:14,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 02:43:14,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:14,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 02:43:14,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:43:14,217 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:43:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:14,230 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-06 02:43:14,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 02:43:14,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 02:43:14,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:14,234 INFO L225 Difference]: With dead ends: 34 [2021-05-06 02:43:14,234 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 02:43:14,235 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:43:14,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 02:43:14,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 02:43:14,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:43:14,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-06 02:43:14,243 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-06 02:43:14,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:14,243 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-06 02:43:14,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:43:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-06 02:43:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:43:14,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:14,249 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:14,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:14,458 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:14,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:14,459 INFO L82 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2021-05-06 02:43:14,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:14,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055049120] [2021-05-06 02:43:14,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:14,480 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:14,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160961763] [2021-05-06 02:43:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:43:14,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:43:14,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:14,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:14,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:14,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:43:14,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:14,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055049120] [2021-05-06 02:43:14,654 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:14,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160961763] [2021-05-06 02:43:14,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160961763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:43:14,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:43:14,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:43:14,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75212958] [2021-05-06 02:43:14,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:43:14,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:14,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:43:14,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:43:14,657 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:43:16,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:16,954 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-05-06 02:43:16,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:43:16,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 02:43:16,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:16,956 INFO L225 Difference]: With dead ends: 39 [2021-05-06 02:43:16,956 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 02:43:16,956 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:43:16,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 02:43:16,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-05-06 02:43:16,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 02:43:16,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-05-06 02:43:16,977 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 23 [2021-05-06 02:43:16,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:16,977 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-05-06 02:43:16,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:43:16,977 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-05-06 02:43:16,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 02:43:16,977 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:16,978 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:17,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:17,185 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:17,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:17,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2021-05-06 02:43:17,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:17,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158277665] [2021-05-06 02:43:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:17,194 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:17,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [209746293] [2021-05-06 02:43:17,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:43:17,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 02:43:17,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:17,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:17,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:17,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:43:17,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:17,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158277665] [2021-05-06 02:43:17,322 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:17,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209746293] [2021-05-06 02:43:17,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209746293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:43:17,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:43:17,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:43:17,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677548106] [2021-05-06 02:43:17,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:43:17,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:17,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:43:17,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:43:17,323 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 02:43:17,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:17,411 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-05-06 02:43:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:43:17,412 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-05-06 02:43:17,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:17,412 INFO L225 Difference]: With dead ends: 43 [2021-05-06 02:43:17,412 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 02:43:17,413 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:43:17,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 02:43:17,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2021-05-06 02:43:17,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:43:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-06 02:43:17,417 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-06 02:43:17,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:17,417 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-06 02:43:17,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 02:43:17,417 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-06 02:43:17,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 02:43:17,418 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:17,418 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:17,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:17,618 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:17,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:17,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2021-05-06 02:43:17,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:17,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618744112] [2021-05-06 02:43:17,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:17,627 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:17,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506122438] [2021-05-06 02:43:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:43:17,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:43:17,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:17,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:17,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:17,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:17,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:17,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:17,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:17,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:17,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:17,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:43:17,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:17,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618744112] [2021-05-06 02:43:17,781 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:17,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506122438] [2021-05-06 02:43:17,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506122438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:43:17,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:43:17,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 02:43:17,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667610188] [2021-05-06 02:43:17,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:43:17,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:17,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:43:17,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:43:17,783 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 02:43:17,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:17,834 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-05-06 02:43:17,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:43:17,834 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-06 02:43:17,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:17,836 INFO L225 Difference]: With dead ends: 43 [2021-05-06 02:43:17,836 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 02:43:17,836 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:43:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 02:43:17,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 02:43:17,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 02:43:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-06 02:43:17,845 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-05-06 02:43:17,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:17,845 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-06 02:43:17,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 02:43:17,845 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-06 02:43:17,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 02:43:17,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:17,846 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:18,053 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:18,053 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:18,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:18,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 2 times [2021-05-06 02:43:18,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:18,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499056104] [2021-05-06 02:43:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:18,062 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:18,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544787587] [2021-05-06 02:43:18,063 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:18,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:43:18,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:43:18,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:43:18,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:18,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:43:18,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:18,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499056104] [2021-05-06 02:43:18,219 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:18,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544787587] [2021-05-06 02:43:18,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544787587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:43:18,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:43:18,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:43:18,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377655061] [2021-05-06 02:43:18,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:43:18,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:18,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:43:18,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:43:18,223 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 02:43:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:18,283 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-06 02:43:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:43:18,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-06 02:43:18,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:18,285 INFO L225 Difference]: With dead ends: 52 [2021-05-06 02:43:18,285 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 02:43:18,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:43:18,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 02:43:18,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 02:43:18,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 02:43:18,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-06 02:43:18,291 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2021-05-06 02:43:18,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:18,291 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-06 02:43:18,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-06 02:43:18,291 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-06 02:43:18,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 02:43:18,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:18,292 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:18,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:18,506 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:18,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:18,507 INFO L82 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 3 times [2021-05-06 02:43:18,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:18,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220330005] [2021-05-06 02:43:18,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:18,514 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:18,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814487515] [2021-05-06 02:43:18,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:18,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:43:18,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:43:18,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:43:18,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:18,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:43:18,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:18,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220330005] [2021-05-06 02:43:18,827 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:18,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814487515] [2021-05-06 02:43:18,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814487515] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:43:18,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:43:18,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:43:18,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915451336] [2021-05-06 02:43:18,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:43:18,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:18,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:43:18,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:43:18,828 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 02:43:18,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:18,890 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-05-06 02:43:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:43:18,890 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2021-05-06 02:43:18,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:18,891 INFO L225 Difference]: With dead ends: 61 [2021-05-06 02:43:18,891 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 02:43:18,892 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:43:18,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 02:43:18,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-06 02:43:18,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 02:43:18,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-05-06 02:43:18,899 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2021-05-06 02:43:18,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:18,899 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-05-06 02:43:18,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-06 02:43:18,899 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-05-06 02:43:18,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 02:43:18,900 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:18,900 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:19,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:19,109 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:19,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:19,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 4 times [2021-05-06 02:43:19,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:19,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484763653] [2021-05-06 02:43:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:19,117 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:19,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919974636] [2021-05-06 02:43:19,117 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:19,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:43:19,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:43:19,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:43:19,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:19,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:43:19,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:19,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484763653] [2021-05-06 02:43:19,316 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:19,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919974636] [2021-05-06 02:43:19,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919974636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:43:19,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:43:19,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:43:19,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633202214] [2021-05-06 02:43:19,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:43:19,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:19,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:43:19,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:43:19,317 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 02:43:19,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:19,391 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-05-06 02:43:19,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:43:19,391 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2021-05-06 02:43:19,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:19,392 INFO L225 Difference]: With dead ends: 70 [2021-05-06 02:43:19,392 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 02:43:19,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 37.5ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:43:19,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 02:43:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 02:43:19,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 02:43:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-05-06 02:43:19,398 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2021-05-06 02:43:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:19,398 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-05-06 02:43:19,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-06 02:43:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-05-06 02:43:19,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 02:43:19,399 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:19,399 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:19,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-06 02:43:19,604 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:19,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 5 times [2021-05-06 02:43:19,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:19,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865722399] [2021-05-06 02:43:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:19,611 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:19,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969243496] [2021-05-06 02:43:19,612 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:19,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 02:43:19,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:43:19,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 02:43:19,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:19,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:43:19,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:19,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865722399] [2021-05-06 02:43:19,797 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:19,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969243496] [2021-05-06 02:43:19,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969243496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:43:19,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:43:19,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:43:19,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269027838] [2021-05-06 02:43:19,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:43:19,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:19,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:43:19,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:43:19,799 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 02:43:19,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:19,876 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-05-06 02:43:19,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:43:19,877 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2021-05-06 02:43:19,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:19,879 INFO L225 Difference]: With dead ends: 79 [2021-05-06 02:43:19,879 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 02:43:19,879 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:43:19,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 02:43:19,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-06 02:43:19,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:43:19,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-05-06 02:43:19,900 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2021-05-06 02:43:19,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:19,900 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-05-06 02:43:19,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-06 02:43:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-05-06 02:43:19,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 02:43:19,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:19,903 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:20,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:20,104 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:20,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:20,104 INFO L82 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 6 times [2021-05-06 02:43:20,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:20,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137321246] [2021-05-06 02:43:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:20,111 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:20,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569620376] [2021-05-06 02:43:20,111 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:20,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 02:43:20,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:43:20,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:43:20,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:20,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:43:20,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:20,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137321246] [2021-05-06 02:43:20,490 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:20,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569620376] [2021-05-06 02:43:20,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569620376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:43:20,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:43:20,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:43:20,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548204056] [2021-05-06 02:43:20,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:43:20,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:20,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:43:20,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:43:20,492 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 02:43:20,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:20,589 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2021-05-06 02:43:20,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:43:20,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2021-05-06 02:43:20,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:20,590 INFO L225 Difference]: With dead ends: 88 [2021-05-06 02:43:20,590 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 02:43:20,591 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:43:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 02:43:20,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-06 02:43:20,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 02:43:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-05-06 02:43:20,596 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2021-05-06 02:43:20,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:20,596 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-05-06 02:43:20,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-06 02:43:20,596 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-05-06 02:43:20,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 02:43:20,597 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:20,597 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:20,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:20,817 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:20,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:20,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 7 times [2021-05-06 02:43:20,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:20,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194727241] [2021-05-06 02:43:20,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:20,835 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:20,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964175420] [2021-05-06 02:43:20,835 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:43:20,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:43:20,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:20,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:20,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:43:21,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:21,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194727241] [2021-05-06 02:43:21,068 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:21,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964175420] [2021-05-06 02:43:21,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964175420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:43:21,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:43:21,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:43:21,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949221762] [2021-05-06 02:43:21,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:43:21,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:21,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:43:21,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:43:21,071 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 02:43:21,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:21,176 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2021-05-06 02:43:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 02:43:21,176 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2021-05-06 02:43:21,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:21,177 INFO L225 Difference]: With dead ends: 97 [2021-05-06 02:43:21,177 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 02:43:21,178 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:43:21,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 02:43:21,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-05-06 02:43:21,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:43:21,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-05-06 02:43:21,183 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2021-05-06 02:43:21,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:21,183 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-05-06 02:43:21,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-06 02:43:21,183 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-05-06 02:43:21,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-06 02:43:21,184 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:21,184 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:21,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 02:43:21,397 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:21,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:21,397 INFO L82 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 8 times [2021-05-06 02:43:21,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:21,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598858880] [2021-05-06 02:43:21,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:21,403 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:21,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131345115] [2021-05-06 02:43:21,403 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:21,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:43:21,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:43:21,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 02:43:21,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:21,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:43:21,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:21,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598858880] [2021-05-06 02:43:21,665 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:21,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131345115] [2021-05-06 02:43:21,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131345115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:43:21,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:43:21,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:43:21,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096735128] [2021-05-06 02:43:21,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:43:21,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:21,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:43:21,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:43:21,666 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 02:43:21,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:21,783 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2021-05-06 02:43:21,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 02:43:21,784 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2021-05-06 02:43:21,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:21,787 INFO L225 Difference]: With dead ends: 106 [2021-05-06 02:43:21,787 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 02:43:21,788 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:43:21,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 02:43:21,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-06 02:43:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 02:43:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-05-06 02:43:21,795 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2021-05-06 02:43:21,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:21,796 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-05-06 02:43:21,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-06 02:43:21,796 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-05-06 02:43:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:43:21,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:21,796 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:22,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:22,013 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:22,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 9 times [2021-05-06 02:43:22,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:22,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151033933] [2021-05-06 02:43:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:22,035 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:22,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366651214] [2021-05-06 02:43:22,035 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:55,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 02:43:55,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:43:55,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:43:55,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:55,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:43:55,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:55,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151033933] [2021-05-06 02:43:55,462 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:55,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366651214] [2021-05-06 02:43:55,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366651214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:43:55,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:43:55,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:43:55,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710884106] [2021-05-06 02:43:55,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:43:55,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:55,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:43:55,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:43:55,463 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 02:43:55,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:55,593 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2021-05-06 02:43:55,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 02:43:55,594 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2021-05-06 02:43:55,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:55,594 INFO L225 Difference]: With dead ends: 115 [2021-05-06 02:43:55,594 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 02:43:55,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:43:55,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 02:43:55,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-06 02:43:55,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 02:43:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-05-06 02:43:55,600 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2021-05-06 02:43:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:55,600 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-05-06 02:43:55,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-06 02:43:55,600 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-05-06 02:43:55,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 02:43:55,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:55,601 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:55,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:43:55,809 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:55,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:55,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 10 times [2021-05-06 02:43:55,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:55,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065868499] [2021-05-06 02:43:55,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:55,815 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:55,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457089114] [2021-05-06 02:43:55,815 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:55,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:43:55,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:43:55,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 02:43:55,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:55,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:55,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:43:56,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:56,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065868499] [2021-05-06 02:43:56,164 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:56,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457089114] [2021-05-06 02:43:56,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457089114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:43:56,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:43:56,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:43:56,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27550633] [2021-05-06 02:43:56,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:43:56,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:56,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:43:56,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:43:56,165 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 02:43:56,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:56,307 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2021-05-06 02:43:56,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 02:43:56,307 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 113 [2021-05-06 02:43:56,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:56,308 INFO L225 Difference]: With dead ends: 124 [2021-05-06 02:43:56,308 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 02:43:56,308 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-06 02:43:56,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 02:43:56,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-06 02:43:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 02:43:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2021-05-06 02:43:56,314 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 113 [2021-05-06 02:43:56,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:56,314 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2021-05-06 02:43:56,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-06 02:43:56,314 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2021-05-06 02:43:56,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 02:43:56,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:56,315 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:56,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:56,529 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:56,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:56,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1999651676, now seen corresponding path program 11 times [2021-05-06 02:43:56,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:56,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890669320] [2021-05-06 02:43:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:56,534 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:56,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919862790] [2021-05-06 02:43:56,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:56,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 02:43:56,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:43:56,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 02:43:56,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:56,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 517 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:43:56,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:56,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890669320] [2021-05-06 02:43:56,857 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:56,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919862790] [2021-05-06 02:43:56,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919862790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:43:56,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:43:56,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:43:56,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297835601] [2021-05-06 02:43:56,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:43:56,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:56,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:43:56,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:43:56,858 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 02:43:57,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:57,010 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2021-05-06 02:43:57,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 02:43:57,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 122 [2021-05-06 02:43:57,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:57,011 INFO L225 Difference]: With dead ends: 133 [2021-05-06 02:43:57,011 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 02:43:57,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-05-06 02:43:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 02:43:57,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-05-06 02:43:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:43:57,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2021-05-06 02:43:57,020 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 122 [2021-05-06 02:43:57,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:57,020 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2021-05-06 02:43:57,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-06 02:43:57,020 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2021-05-06 02:43:57,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-06 02:43:57,022 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:57,022 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:57,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 02:43:57,237 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:57,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:57,238 INFO L82 PathProgramCache]: Analyzing trace with hash 881443734, now seen corresponding path program 12 times [2021-05-06 02:43:57,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:57,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946372281] [2021-05-06 02:43:57,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:57,244 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:57,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071374074] [2021-05-06 02:43:57,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:57,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 02:43:57,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:43:57,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:43:57,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:57,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 618 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:43:57,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:57,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946372281] [2021-05-06 02:43:57,842 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:57,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071374074] [2021-05-06 02:43:57,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071374074] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:43:57,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:43:57,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 02:43:57,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008931056] [2021-05-06 02:43:57,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 02:43:57,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:57,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 02:43:57,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:43:57,843 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-06 02:43:58,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:58,041 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2021-05-06 02:43:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 02:43:58,041 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 131 [2021-05-06 02:43:58,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:58,042 INFO L225 Difference]: With dead ends: 142 [2021-05-06 02:43:58,042 INFO L226 Difference]: Without dead ends: 137 [2021-05-06 02:43:58,043 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-06 02:43:58,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-06 02:43:58,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-06 02:43:58,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 02:43:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2021-05-06 02:43:58,048 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 131 [2021-05-06 02:43:58,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:58,049 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2021-05-06 02:43:58,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-06 02:43:58,049 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2021-05-06 02:43:58,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-06 02:43:58,049 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:58,049 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:58,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 02:43:58,255 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:58,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:58,255 INFO L82 PathProgramCache]: Analyzing trace with hash 2089018524, now seen corresponding path program 13 times [2021-05-06 02:43:58,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:58,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540435611] [2021-05-06 02:43:58,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:58,262 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:58,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371735188] [2021-05-06 02:43:58,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:43:58,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 02:43:58,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:58,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 728 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:43:58,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:58,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540435611] [2021-05-06 02:43:58,611 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:58,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371735188] [2021-05-06 02:43:58,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371735188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:43:58,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:43:58,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:43:58,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444542014] [2021-05-06 02:43:58,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:43:58,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:58,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:43:58,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:43:58,613 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-06 02:43:58,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:58,831 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2021-05-06 02:43:58,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 02:43:58,832 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 140 [2021-05-06 02:43:58,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:58,833 INFO L225 Difference]: With dead ends: 151 [2021-05-06 02:43:58,833 INFO L226 Difference]: Without dead ends: 146 [2021-05-06 02:43:58,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-06 02:43:58,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-06 02:43:58,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-05-06 02:43:58,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 110 states have internal predecessors, (125), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:43:58,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2021-05-06 02:43:58,839 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 140 [2021-05-06 02:43:58,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:58,839 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2021-05-06 02:43:58,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-06 02:43:58,840 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2021-05-06 02:43:58,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-06 02:43:58,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:58,840 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:59,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:43:59,045 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:59,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:59,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1088976298, now seen corresponding path program 14 times [2021-05-06 02:43:59,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:59,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939162921] [2021-05-06 02:43:59,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:59,050 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:59,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977511446] [2021-05-06 02:43:59,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:43:59,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:43:59,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:43:59,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 02:43:59,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:43:59,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:43:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 847 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:43:59,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:59,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939162921] [2021-05-06 02:43:59,434 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:43:59,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977511446] [2021-05-06 02:43:59,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977511446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:43:59,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:43:59,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 02:43:59,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971607668] [2021-05-06 02:43:59,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 02:43:59,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:59,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 02:43:59,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:43:59,435 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-06 02:43:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:59,698 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2021-05-06 02:43:59,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 02:43:59,699 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 149 [2021-05-06 02:43:59,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:59,700 INFO L225 Difference]: With dead ends: 160 [2021-05-06 02:43:59,700 INFO L226 Difference]: Without dead ends: 155 [2021-05-06 02:43:59,700 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-06 02:43:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-06 02:43:59,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-05-06 02:43:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 02:43:59,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2021-05-06 02:43:59,705 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 149 [2021-05-06 02:43:59,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:59,706 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2021-05-06 02:43:59,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-06 02:43:59,706 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2021-05-06 02:43:59,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-06 02:43:59,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:59,707 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:59,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:43:59,916 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:59,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:59,916 INFO L82 PathProgramCache]: Analyzing trace with hash -2060864036, now seen corresponding path program 15 times [2021-05-06 02:43:59,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:59,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083619498] [2021-05-06 02:43:59,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:59,921 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:43:59,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579236271] [2021-05-06 02:43:59,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:05,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 02:44:05,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:44:05,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 02:44:05,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:05,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:05,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:44:05,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:05,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083619498] [2021-05-06 02:44:05,919 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:05,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579236271] [2021-05-06 02:44:05,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579236271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:44:05,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:44:05,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 02:44:05,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137940639] [2021-05-06 02:44:05,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 02:44:05,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:05,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 02:44:05,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 02:44:05,921 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-06 02:44:06,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:06,181 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2021-05-06 02:44:06,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 02:44:06,181 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 158 [2021-05-06 02:44:06,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:06,182 INFO L225 Difference]: With dead ends: 169 [2021-05-06 02:44:06,182 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 02:44:06,183 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 02:44:06,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 02:44:06,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-05-06 02:44:06,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 02:44:06,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 181 transitions. [2021-05-06 02:44:06,189 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 181 transitions. Word has length 158 [2021-05-06 02:44:06,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:06,189 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 181 transitions. [2021-05-06 02:44:06,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-06 02:44:06,189 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 181 transitions. [2021-05-06 02:44:06,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-06 02:44:06,190 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:06,190 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:06,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:06,398 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:06,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:06,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1479991018, now seen corresponding path program 16 times [2021-05-06 02:44:06,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:06,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134165872] [2021-05-06 02:44:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:06,410 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:06,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553373932] [2021-05-06 02:44:06,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:06,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:44:06,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:44:06,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 02:44:06,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:06,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 1112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:44:06,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:06,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134165872] [2021-05-06 02:44:06,905 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:06,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553373932] [2021-05-06 02:44:06,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553373932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:44:06,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:44:06,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 02:44:06,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633620654] [2021-05-06 02:44:06,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 02:44:06,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:06,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 02:44:06,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:44:06,906 INFO L87 Difference]: Start difference. First operand 164 states and 181 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-06 02:44:07,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:07,175 INFO L93 Difference]: Finished difference Result 178 states and 196 transitions. [2021-05-06 02:44:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 02:44:07,175 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 167 [2021-05-06 02:44:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:07,176 INFO L225 Difference]: With dead ends: 178 [2021-05-06 02:44:07,176 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 02:44:07,177 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 291.9ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 02:44:07,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 02:44:07,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-06 02:44:07,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 02:44:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2021-05-06 02:44:07,186 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 167 [2021-05-06 02:44:07,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:07,186 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2021-05-06 02:44:07,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-06 02:44:07,186 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2021-05-06 02:44:07,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-05-06 02:44:07,187 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:07,187 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:07,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:07,392 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:07,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:07,392 INFO L82 PathProgramCache]: Analyzing trace with hash 318093084, now seen corresponding path program 17 times [2021-05-06 02:44:07,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:07,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355408176] [2021-05-06 02:44:07,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:07,397 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:07,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169290341] [2021-05-06 02:44:07,397 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:07,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-06 02:44:07,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:44:07,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 02:44:07,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:07,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 1258 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:44:07,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:07,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355408176] [2021-05-06 02:44:07,858 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:07,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169290341] [2021-05-06 02:44:07,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169290341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:44:07,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:44:07,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-06 02:44:07,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532155606] [2021-05-06 02:44:07,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 02:44:07,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:07,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 02:44:07,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:44:07,859 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-06 02:44:08,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:08,133 INFO L93 Difference]: Finished difference Result 187 states and 206 transitions. [2021-05-06 02:44:08,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-06 02:44:08,134 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 176 [2021-05-06 02:44:08,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:08,135 INFO L225 Difference]: With dead ends: 187 [2021-05-06 02:44:08,135 INFO L226 Difference]: Without dead ends: 182 [2021-05-06 02:44:08,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 288.0ms TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 02:44:08,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-06 02:44:08,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-05-06 02:44:08,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:44:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2021-05-06 02:44:08,144 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 176 [2021-05-06 02:44:08,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:08,144 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2021-05-06 02:44:08,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-06 02:44:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2021-05-06 02:44:08,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-06 02:44:08,145 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:08,145 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:08,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 02:44:08,362 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:08,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:08,363 INFO L82 PathProgramCache]: Analyzing trace with hash 994740182, now seen corresponding path program 18 times [2021-05-06 02:44:08,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:08,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511959043] [2021-05-06 02:44:08,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:08,370 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:08,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837231881] [2021-05-06 02:44:08,370 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:16,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-06 02:44:16,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:44:16,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 02:44:16,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:16,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 1413 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:44:16,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:16,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511959043] [2021-05-06 02:44:16,588 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:16,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837231881] [2021-05-06 02:44:16,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837231881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:44:16,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:44:16,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 02:44:16,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757929528] [2021-05-06 02:44:16,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 02:44:16,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:16,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 02:44:16,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:44:16,589 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-06 02:44:16,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:16,900 INFO L93 Difference]: Finished difference Result 196 states and 216 transitions. [2021-05-06 02:44:16,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-06 02:44:16,907 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 185 [2021-05-06 02:44:16,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:16,908 INFO L225 Difference]: With dead ends: 196 [2021-05-06 02:44:16,908 INFO L226 Difference]: Without dead ends: 191 [2021-05-06 02:44:16,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 320.3ms TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-05-06 02:44:16,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-06 02:44:16,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-05-06 02:44:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 states have internal predecessors, (165), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 02:44:16,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2021-05-06 02:44:16,921 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 185 [2021-05-06 02:44:16,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:16,922 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2021-05-06 02:44:16,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-06 02:44:16,922 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2021-05-06 02:44:16,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-06 02:44:16,924 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:16,924 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:17,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:17,133 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:17,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:17,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1522264156, now seen corresponding path program 19 times [2021-05-06 02:44:17,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:17,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985663696] [2021-05-06 02:44:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:17,139 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:17,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127991434] [2021-05-06 02:44:17,139 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:17,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 02:44:17,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:17,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 1577 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:44:17,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:17,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985663696] [2021-05-06 02:44:17,636 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:17,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127991434] [2021-05-06 02:44:17,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127991434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:44:17,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:44:17,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 02:44:17,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453549083] [2021-05-06 02:44:17,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 02:44:17,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:17,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 02:44:17,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-06 02:44:17,637 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-06 02:44:17,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:17,989 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2021-05-06 02:44:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-06 02:44:17,989 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 194 [2021-05-06 02:44:17,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:17,990 INFO L225 Difference]: With dead ends: 205 [2021-05-06 02:44:17,991 INFO L226 Difference]: Without dead ends: 200 [2021-05-06 02:44:17,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 362.6ms TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-05-06 02:44:17,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-06 02:44:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-05-06 02:44:17,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.138157894736842) internal successors, (173), 152 states have internal predecessors, (173), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 02:44:17,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2021-05-06 02:44:17,998 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 194 [2021-05-06 02:44:17,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:17,998 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2021-05-06 02:44:17,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-06 02:44:17,999 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2021-05-06 02:44:18,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-05-06 02:44:18,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:18,000 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:18,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 02:44:18,217 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:18,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:18,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1934081686, now seen corresponding path program 20 times [2021-05-06 02:44:18,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:18,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135871481] [2021-05-06 02:44:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:18,223 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:18,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305405526] [2021-05-06 02:44:18,223 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:18,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:44:18,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:44:18,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 02:44:18,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:18,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 40 proven. 1750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:44:18,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:18,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135871481] [2021-05-06 02:44:18,775 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:18,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305405526] [2021-05-06 02:44:18,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305405526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:44:18,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:44:18,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-06 02:44:18,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657461991] [2021-05-06 02:44:18,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-06 02:44:18,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:18,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-06 02:44:18,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-06 02:44:18,777 INFO L87 Difference]: Start difference. First operand 200 states and 221 transitions. Second operand has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2021-05-06 02:44:19,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:19,146 INFO L93 Difference]: Finished difference Result 214 states and 236 transitions. [2021-05-06 02:44:19,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-06 02:44:19,147 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) Word has length 203 [2021-05-06 02:44:19,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:19,148 INFO L225 Difference]: With dead ends: 214 [2021-05-06 02:44:19,148 INFO L226 Difference]: Without dead ends: 209 [2021-05-06 02:44:19,148 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 414.0ms TimeCoverageRelationStatistics Valid=715, Invalid=1177, Unknown=0, NotChecked=0, Total=1892 [2021-05-06 02:44:19,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-05-06 02:44:19,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2021-05-06 02:44:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 159 states have (on average 1.1383647798742138) internal successors, (181), 159 states have internal predecessors, (181), 26 states have call successors, (26), 25 states have call predecessors, (26), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 02:44:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 231 transitions. [2021-05-06 02:44:19,155 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 231 transitions. Word has length 203 [2021-05-06 02:44:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:19,155 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 231 transitions. [2021-05-06 02:44:19,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2021-05-06 02:44:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 231 transitions. [2021-05-06 02:44:19,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-05-06 02:44:19,156 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:19,156 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:19,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:19,373 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:19,373 INFO L82 PathProgramCache]: Analyzing trace with hash -2075113060, now seen corresponding path program 21 times [2021-05-06 02:44:19,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:19,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165065514] [2021-05-06 02:44:19,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:19,378 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:19,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097496877] [2021-05-06 02:44:19,378 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:23,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-06 02:44:23,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:44:23,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-06 02:44:23,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:23,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:23,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:24,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:24,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:24,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:24,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:24,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:24,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:24,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:24,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:24,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:24,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:24,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:24,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:24,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:24,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 42 proven. 1932 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:44:24,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:24,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165065514] [2021-05-06 02:44:24,142 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:24,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097496877] [2021-05-06 02:44:24,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097496877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:44:24,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:44:24,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-06 02:44:24,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594486297] [2021-05-06 02:44:24,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-06 02:44:24,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:24,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-06 02:44:24,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-06 02:44:24,144 INFO L87 Difference]: Start difference. First operand 209 states and 231 transitions. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2021-05-06 02:44:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:24,532 INFO L93 Difference]: Finished difference Result 223 states and 246 transitions. [2021-05-06 02:44:24,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-06 02:44:24,532 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 212 [2021-05-06 02:44:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:24,533 INFO L225 Difference]: With dead ends: 223 [2021-05-06 02:44:24,533 INFO L226 Difference]: Without dead ends: 218 [2021-05-06 02:44:24,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 427.0ms TimeCoverageRelationStatistics Valid=782, Invalid=1288, Unknown=0, NotChecked=0, Total=2070 [2021-05-06 02:44:24,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-06 02:44:24,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2021-05-06 02:44:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 02:44:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 241 transitions. [2021-05-06 02:44:24,546 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 241 transitions. Word has length 212 [2021-05-06 02:44:24,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:24,546 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 241 transitions. [2021-05-06 02:44:24,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2021-05-06 02:44:24,547 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 241 transitions. [2021-05-06 02:44:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-05-06 02:44:24,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:24,548 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:24,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 02:44:24,756 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:24,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:24,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1234385578, now seen corresponding path program 22 times [2021-05-06 02:44:24,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:24,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764772144] [2021-05-06 02:44:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:24,770 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:24,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [191160633] [2021-05-06 02:44:24,770 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 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 02:44:25,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:44:25,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:44:25,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-06 02:44:25,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:25,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:44:25,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:25,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764772144] [2021-05-06 02:44:25,523 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:25,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191160633] [2021-05-06 02:44:25,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191160633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:44:25,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:44:25,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-06 02:44:25,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815152522] [2021-05-06 02:44:25,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-06 02:44:25,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:25,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-06 02:44:25,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-06 02:44:25,524 INFO L87 Difference]: Start difference. First operand 218 states and 241 transitions. Second operand has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2021-05-06 02:44:25,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:25,899 INFO L93 Difference]: Finished difference Result 232 states and 256 transitions. [2021-05-06 02:44:25,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-06 02:44:25,900 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) Word has length 221 [2021-05-06 02:44:25,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:25,901 INFO L225 Difference]: With dead ends: 232 [2021-05-06 02:44:25,901 INFO L226 Difference]: Without dead ends: 227 [2021-05-06 02:44:25,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 440.8ms TimeCoverageRelationStatistics Valid=852, Invalid=1404, Unknown=0, NotChecked=0, Total=2256 [2021-05-06 02:44:25,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-06 02:44:25,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2021-05-06 02:44:25,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 173 states have (on average 1.138728323699422) internal successors, (197), 173 states have internal predecessors, (197), 28 states have call successors, (28), 27 states have call predecessors, (28), 25 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 02:44:25,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 251 transitions. [2021-05-06 02:44:25,908 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 251 transitions. Word has length 221 [2021-05-06 02:44:25,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:25,909 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 251 transitions. [2021-05-06 02:44:25,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2021-05-06 02:44:25,909 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 251 transitions. [2021-05-06 02:44:25,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-05-06 02:44:25,909 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:25,910 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:26,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 02:44:26,119 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:26,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:26,119 INFO L82 PathProgramCache]: Analyzing trace with hash -360260900, now seen corresponding path program 23 times [2021-05-06 02:44:26,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:26,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27576274] [2021-05-06 02:44:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:26,124 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:26,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838529899] [2021-05-06 02:44:26,124 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 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 02:44:26,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-06 02:44:26,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:44:26,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-06 02:44:26,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:26,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 46 proven. 2323 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:44:26,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:26,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27576274] [2021-05-06 02:44:26,972 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:26,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838529899] [2021-05-06 02:44:26,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838529899] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:44:26,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:44:26,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-06 02:44:26,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819583176] [2021-05-06 02:44:26,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-06 02:44:26,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:26,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-06 02:44:26,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-06 02:44:26,973 INFO L87 Difference]: Start difference. First operand 227 states and 251 transitions. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2021-05-06 02:44:27,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:27,414 INFO L93 Difference]: Finished difference Result 241 states and 266 transitions. [2021-05-06 02:44:27,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-06 02:44:27,415 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) Word has length 230 [2021-05-06 02:44:27,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:27,416 INFO L225 Difference]: With dead ends: 241 [2021-05-06 02:44:27,416 INFO L226 Difference]: Without dead ends: 236 [2021-05-06 02:44:27,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 483.4ms TimeCoverageRelationStatistics Valid=925, Invalid=1525, Unknown=0, NotChecked=0, Total=2450 [2021-05-06 02:44:27,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-06 02:44:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-05-06 02:44:27,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 180 states have (on average 1.1388888888888888) internal successors, (205), 180 states have internal predecessors, (205), 29 states have call successors, (29), 28 states have call predecessors, (29), 26 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-06 02:44:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 261 transitions. [2021-05-06 02:44:27,428 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 261 transitions. Word has length 230 [2021-05-06 02:44:27,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:27,428 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 261 transitions. [2021-05-06 02:44:27,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2021-05-06 02:44:27,428 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 261 transitions. [2021-05-06 02:44:27,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-05-06 02:44:27,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:27,429 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:27,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 02:44:27,637 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:27,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:27,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1738171370, now seen corresponding path program 24 times [2021-05-06 02:44:27,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:27,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667255828] [2021-05-06 02:44:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:27,646 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:27,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034440138] [2021-05-06 02:44:27,646 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 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 02:44:47,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-06 02:44:47,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:44:47,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 02:44:47,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:47,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 48 proven. 2532 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:44:47,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:47,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667255828] [2021-05-06 02:44:47,716 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:47,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034440138] [2021-05-06 02:44:47,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034440138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:44:47,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:44:47,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-05-06 02:44:47,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144815600] [2021-05-06 02:44:47,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-06 02:44:47,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:47,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-06 02:44:47,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-06 02:44:47,717 INFO L87 Difference]: Start difference. First operand 236 states and 261 transitions. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2021-05-06 02:44:48,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:48,152 INFO L93 Difference]: Finished difference Result 250 states and 276 transitions. [2021-05-06 02:44:48,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-06 02:44:48,152 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) Word has length 239 [2021-05-06 02:44:48,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:48,153 INFO L225 Difference]: With dead ends: 250 [2021-05-06 02:44:48,153 INFO L226 Difference]: Without dead ends: 245 [2021-05-06 02:44:48,154 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 521.5ms TimeCoverageRelationStatistics Valid=1001, Invalid=1651, Unknown=0, NotChecked=0, Total=2652 [2021-05-06 02:44:48,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-06 02:44:48,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2021-05-06 02:44:48,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 187 states have (on average 1.13903743315508) internal successors, (213), 187 states have internal predecessors, (213), 30 states have call successors, (30), 29 states have call predecessors, (30), 27 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 02:44:48,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 271 transitions. [2021-05-06 02:44:48,165 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 271 transitions. Word has length 239 [2021-05-06 02:44:48,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:48,165 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 271 transitions. [2021-05-06 02:44:48,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2021-05-06 02:44:48,165 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 271 transitions. [2021-05-06 02:44:48,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-05-06 02:44:48,166 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:48,166 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:48,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 02:44:48,377 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:48,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:48,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1530108956, now seen corresponding path program 25 times [2021-05-06 02:44:48,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:48,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738375649] [2021-05-06 02:44:48,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:48,382 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:48,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133441863] [2021-05-06 02:44:48,382 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 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 02:44:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:48,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-06 02:44:48,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:48,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:48,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 50 proven. 2750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:44:49,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:49,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738375649] [2021-05-06 02:44:49,028 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:49,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133441863] [2021-05-06 02:44:49,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133441863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:44:49,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:44:49,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-05-06 02:44:49,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167254567] [2021-05-06 02:44:49,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-06 02:44:49,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:49,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-06 02:44:49,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-06 02:44:49,030 INFO L87 Difference]: Start difference. First operand 245 states and 271 transitions. Second operand has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2021-05-06 02:44:49,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:49,531 INFO L93 Difference]: Finished difference Result 259 states and 286 transitions. [2021-05-06 02:44:49,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-06 02:44:49,532 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) Word has length 248 [2021-05-06 02:44:49,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:49,533 INFO L225 Difference]: With dead ends: 259 [2021-05-06 02:44:49,533 INFO L226 Difference]: Without dead ends: 254 [2021-05-06 02:44:49,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 578.4ms TimeCoverageRelationStatistics Valid=1080, Invalid=1782, Unknown=0, NotChecked=0, Total=2862 [2021-05-06 02:44:49,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-06 02:44:49,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-05-06 02:44:49,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.1391752577319587) internal successors, (221), 194 states have internal predecessors, (221), 31 states have call successors, (31), 30 states have call predecessors, (31), 28 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 02:44:49,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 281 transitions. [2021-05-06 02:44:49,541 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 281 transitions. Word has length 248 [2021-05-06 02:44:49,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:49,541 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 281 transitions. [2021-05-06 02:44:49,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2021-05-06 02:44:49,541 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 281 transitions. [2021-05-06 02:44:49,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-05-06 02:44:49,542 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:49,542 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:49,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 02:44:49,761 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:49,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:49,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1713487146, now seen corresponding path program 26 times [2021-05-06 02:44:49,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:49,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974741869] [2021-05-06 02:44:49,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:49,768 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:49,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [747304628] [2021-05-06 02:44:49,768 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 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 02:44:49,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:44:49,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:44:49,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 02:44:49,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:49,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:49,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3033 backedges. 52 proven. 2977 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:44:50,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:50,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974741869] [2021-05-06 02:44:50,508 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:50,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747304628] [2021-05-06 02:44:50,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747304628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:44:50,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:44:50,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-06 02:44:50,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554188938] [2021-05-06 02:44:50,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-06 02:44:50,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:50,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-06 02:44:50,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-06 02:44:50,510 INFO L87 Difference]: Start difference. First operand 254 states and 281 transitions. Second operand has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2021-05-06 02:44:51,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:51,049 INFO L93 Difference]: Finished difference Result 268 states and 296 transitions. [2021-05-06 02:44:51,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-06 02:44:51,050 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) Word has length 257 [2021-05-06 02:44:51,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:51,051 INFO L225 Difference]: With dead ends: 268 [2021-05-06 02:44:51,051 INFO L226 Difference]: Without dead ends: 263 [2021-05-06 02:44:51,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 618.5ms TimeCoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2021-05-06 02:44:51,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-05-06 02:44:51,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-05-06 02:44:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 201 states have (on average 1.1393034825870647) internal successors, (229), 201 states have internal predecessors, (229), 32 states have call successors, (32), 31 states have call predecessors, (32), 29 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 02:44:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 291 transitions. [2021-05-06 02:44:51,060 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 291 transitions. Word has length 257 [2021-05-06 02:44:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:51,060 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 291 transitions. [2021-05-06 02:44:51,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2021-05-06 02:44:51,060 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 291 transitions. [2021-05-06 02:44:51,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-06 02:44:51,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:51,061 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:51,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:51,277 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:51,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:51,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1462406492, now seen corresponding path program 27 times [2021-05-06 02:44:51,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:51,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577064156] [2021-05-06 02:44:51,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:51,282 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:51,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658093092] [2021-05-06 02:44:51,282 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 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 02:45:03,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-06 02:45:03,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:45:03,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-06 02:45:03,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:03,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:03,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3271 backedges. 54 proven. 3213 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:45:03,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:03,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577064156] [2021-05-06 02:45:03,624 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:03,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658093092] [2021-05-06 02:45:03,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658093092] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:45:03,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:45:03,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-05-06 02:45:03,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386975660] [2021-05-06 02:45:03,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-06 02:45:03,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:03,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-06 02:45:03,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-06 02:45:03,625 INFO L87 Difference]: Start difference. First operand 263 states and 291 transitions. Second operand has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2021-05-06 02:45:04,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:04,138 INFO L93 Difference]: Finished difference Result 277 states and 306 transitions. [2021-05-06 02:45:04,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-06 02:45:04,138 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) Word has length 266 [2021-05-06 02:45:04,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:04,139 INFO L225 Difference]: With dead ends: 277 [2021-05-06 02:45:04,140 INFO L226 Difference]: Without dead ends: 272 [2021-05-06 02:45:04,140 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 612.7ms TimeCoverageRelationStatistics Valid=1247, Invalid=2059, Unknown=0, NotChecked=0, Total=3306 [2021-05-06 02:45:04,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-06 02:45:04,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2021-05-06 02:45:04,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 208 states have (on average 1.1394230769230769) internal successors, (237), 208 states have internal predecessors, (237), 33 states have call successors, (33), 32 states have call predecessors, (33), 30 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 02:45:04,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 301 transitions. [2021-05-06 02:45:04,156 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 301 transitions. Word has length 266 [2021-05-06 02:45:04,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:04,156 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 301 transitions. [2021-05-06 02:45:04,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2021-05-06 02:45:04,157 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 301 transitions. [2021-05-06 02:45:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-05-06 02:45:04,158 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:04,158 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:04,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:04,368 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:04,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:04,368 INFO L82 PathProgramCache]: Analyzing trace with hash -394085994, now seen corresponding path program 28 times [2021-05-06 02:45:04,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:04,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491500909] [2021-05-06 02:45:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:04,373 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:04,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1003455918] [2021-05-06 02:45:04,374 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 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 02:45:04,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:45:04,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:45:04,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-06 02:45:04,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:04,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:04,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3518 backedges. 56 proven. 3458 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:45:05,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:05,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491500909] [2021-05-06 02:45:05,160 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:05,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003455918] [2021-05-06 02:45:05,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003455918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:45:05,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:45:05,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-05-06 02:45:05,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789010865] [2021-05-06 02:45:05,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-06 02:45:05,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:05,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-06 02:45:05,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-06 02:45:05,161 INFO L87 Difference]: Start difference. First operand 272 states and 301 transitions. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2021-05-06 02:45:05,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:05,717 INFO L93 Difference]: Finished difference Result 286 states and 316 transitions. [2021-05-06 02:45:05,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-06 02:45:05,718 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) Word has length 275 [2021-05-06 02:45:05,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:05,719 INFO L225 Difference]: With dead ends: 286 [2021-05-06 02:45:05,719 INFO L226 Difference]: Without dead ends: 281 [2021-05-06 02:45:05,720 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 677.7ms TimeCoverageRelationStatistics Valid=1335, Invalid=2205, Unknown=0, NotChecked=0, Total=3540 [2021-05-06 02:45:05,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-06 02:45:05,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2021-05-06 02:45:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 215 states have (on average 1.1395348837209303) internal successors, (245), 215 states have internal predecessors, (245), 34 states have call successors, (34), 33 states have call predecessors, (34), 31 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 02:45:05,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 311 transitions. [2021-05-06 02:45:05,728 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 311 transitions. Word has length 275 [2021-05-06 02:45:05,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:05,729 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 311 transitions. [2021-05-06 02:45:05,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2021-05-06 02:45:05,729 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 311 transitions. [2021-05-06 02:45:05,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-05-06 02:45:05,730 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:05,730 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:05,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 02:45:05,952 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:05,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:05,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1379905180, now seen corresponding path program 29 times [2021-05-06 02:45:05,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:05,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101623264] [2021-05-06 02:45:05,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:05,958 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:05,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586364100] [2021-05-06 02:45:05,958 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 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 02:45:18,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-06 02:45:18,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:45:18,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-06 02:45:18,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:18,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:18,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 58 proven. 3712 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:45:19,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:19,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101623264] [2021-05-06 02:45:19,182 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:19,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586364100] [2021-05-06 02:45:19,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586364100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:45:19,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:45:19,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-05-06 02:45:19,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841496561] [2021-05-06 02:45:19,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-06 02:45:19,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:19,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-06 02:45:19,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 02:45:19,183 INFO L87 Difference]: Start difference. First operand 281 states and 311 transitions. Second operand has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2021-05-06 02:45:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:19,858 INFO L93 Difference]: Finished difference Result 295 states and 326 transitions. [2021-05-06 02:45:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-06 02:45:19,858 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) Word has length 284 [2021-05-06 02:45:19,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:19,859 INFO L225 Difference]: With dead ends: 295 [2021-05-06 02:45:19,859 INFO L226 Difference]: Without dead ends: 290 [2021-05-06 02:45:19,860 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 809.6ms TimeCoverageRelationStatistics Valid=1426, Invalid=2356, Unknown=0, NotChecked=0, Total=3782 [2021-05-06 02:45:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-05-06 02:45:19,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2021-05-06 02:45:19,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 222 states have (on average 1.1396396396396395) internal successors, (253), 222 states have internal predecessors, (253), 35 states have call successors, (35), 34 states have call predecessors, (35), 32 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-06 02:45:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 321 transitions. [2021-05-06 02:45:19,875 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 321 transitions. Word has length 284 [2021-05-06 02:45:19,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:19,875 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 321 transitions. [2021-05-06 02:45:19,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2021-05-06 02:45:19,876 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 321 transitions. [2021-05-06 02:45:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-05-06 02:45:19,877 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:19,877 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:20,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:20,089 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:20,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:20,089 INFO L82 PathProgramCache]: Analyzing trace with hash 520028246, now seen corresponding path program 30 times [2021-05-06 02:45:20,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:20,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806958474] [2021-05-06 02:45:20,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:20,095 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:20,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112235052] [2021-05-06 02:45:20,095 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 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 02:45:47,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-06 02:45:47,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:45:47,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 02:45:47,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:47,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4039 backedges. 60 proven. 3975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:45:47,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:47,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806958474] [2021-05-06 02:45:47,743 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:47,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112235052] [2021-05-06 02:45:47,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112235052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:45:47,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:45:47,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-05-06 02:45:47,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625269554] [2021-05-06 02:45:47,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-06 02:45:47,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:47,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-06 02:45:47,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 02:45:47,745 INFO L87 Difference]: Start difference. First operand 290 states and 321 transitions. Second operand has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2021-05-06 02:45:48,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:48,345 INFO L93 Difference]: Finished difference Result 304 states and 336 transitions. [2021-05-06 02:45:48,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-06 02:45:48,346 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) Word has length 293 [2021-05-06 02:45:48,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:48,347 INFO L225 Difference]: With dead ends: 304 [2021-05-06 02:45:48,347 INFO L226 Difference]: Without dead ends: 299 [2021-05-06 02:45:48,348 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 757.6ms TimeCoverageRelationStatistics Valid=1520, Invalid=2512, Unknown=0, NotChecked=0, Total=4032 [2021-05-06 02:45:48,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-05-06 02:45:48,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2021-05-06 02:45:48,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 229 states have internal predecessors, (261), 36 states have call successors, (36), 35 states have call predecessors, (36), 33 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 02:45:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 331 transitions. [2021-05-06 02:45:48,355 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 331 transitions. Word has length 293 [2021-05-06 02:45:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:48,355 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 331 transitions. [2021-05-06 02:45:48,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2021-05-06 02:45:48,355 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 331 transitions. [2021-05-06 02:45:48,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-05-06 02:45:48,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:48,356 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:48,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 02:45:48,572 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:48,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:48,572 INFO L82 PathProgramCache]: Analyzing trace with hash -213450788, now seen corresponding path program 31 times [2021-05-06 02:45:48,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:48,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508991789] [2021-05-06 02:45:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:48,577 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:48,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013018739] [2021-05-06 02:45:48,577 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 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 02:45:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:45:48,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 02:45:48,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:48,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:48,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 62 proven. 4247 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:45:49,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:49,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508991789] [2021-05-06 02:45:49,413 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:49,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013018739] [2021-05-06 02:45:49,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013018739] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:45:49,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:45:49,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-05-06 02:45:49,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395955713] [2021-05-06 02:45:49,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-06 02:45:49,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:49,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-06 02:45:49,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-06 02:45:49,414 INFO L87 Difference]: Start difference. First operand 299 states and 331 transitions. Second operand has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2021-05-06 02:45:50,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:50,039 INFO L93 Difference]: Finished difference Result 313 states and 346 transitions. [2021-05-06 02:45:50,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-06 02:45:50,039 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) Word has length 302 [2021-05-06 02:45:50,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:50,040 INFO L225 Difference]: With dead ends: 313 [2021-05-06 02:45:50,040 INFO L226 Difference]: Without dead ends: 308 [2021-05-06 02:45:50,041 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 785.5ms TimeCoverageRelationStatistics Valid=1617, Invalid=2673, Unknown=0, NotChecked=0, Total=4290 [2021-05-06 02:45:50,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-05-06 02:45:50,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-05-06 02:45:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 236 states have (on average 1.1398305084745763) internal successors, (269), 236 states have internal predecessors, (269), 37 states have call successors, (37), 36 states have call predecessors, (37), 34 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-06 02:45:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 341 transitions. [2021-05-06 02:45:50,049 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 341 transitions. Word has length 302 [2021-05-06 02:45:50,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:50,049 INFO L480 AbstractCegarLoop]: Abstraction has 308 states and 341 transitions. [2021-05-06 02:45:50,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2021-05-06 02:45:50,049 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 341 transitions. [2021-05-06 02:45:50,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-05-06 02:45:50,050 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:50,050 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:50,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:45:50,257 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:50,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:50,257 INFO L82 PathProgramCache]: Analyzing trace with hash 83826454, now seen corresponding path program 32 times [2021-05-06 02:45:50,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:50,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77957764] [2021-05-06 02:45:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:50,262 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:50,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801148173] [2021-05-06 02:45:50,262 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 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 02:45:50,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:45:50,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:45:50,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-06 02:45:50,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:45:50,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:50,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:51,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:51,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:51,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:51,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:51,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:51,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:51,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:51,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:51,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:51,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:51,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:51,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:51,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:51,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:45:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 64 proven. 4528 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:45:51,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:45:51,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77957764] [2021-05-06 02:45:51,159 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:45:51,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801148173] [2021-05-06 02:45:51,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801148173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:45:51,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:45:51,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-05-06 02:45:51,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78749687] [2021-05-06 02:45:51,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-06 02:45:51,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:45:51,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-06 02:45:51,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 02:45:51,160 INFO L87 Difference]: Start difference. First operand 308 states and 341 transitions. Second operand has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2021-05-06 02:45:51,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:45:51,861 INFO L93 Difference]: Finished difference Result 322 states and 356 transitions. [2021-05-06 02:45:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-06 02:45:51,862 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) Word has length 311 [2021-05-06 02:45:51,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:45:51,863 INFO L225 Difference]: With dead ends: 322 [2021-05-06 02:45:51,863 INFO L226 Difference]: Without dead ends: 317 [2021-05-06 02:45:51,863 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 855.2ms TimeCoverageRelationStatistics Valid=1717, Invalid=2839, Unknown=0, NotChecked=0, Total=4556 [2021-05-06 02:45:51,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-05-06 02:45:51,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2021-05-06 02:45:51,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 243 states have (on average 1.139917695473251) internal successors, (277), 243 states have internal predecessors, (277), 38 states have call successors, (38), 37 states have call predecessors, (38), 35 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-06 02:45:51,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 351 transitions. [2021-05-06 02:45:51,871 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 351 transitions. Word has length 311 [2021-05-06 02:45:51,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:45:51,871 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 351 transitions. [2021-05-06 02:45:51,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2021-05-06 02:45:51,871 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 351 transitions. [2021-05-06 02:45:51,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-05-06 02:45:51,872 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:45:51,872 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:45:52,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-06 02:45:52,090 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:45:52,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:45:52,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1410629916, now seen corresponding path program 33 times [2021-05-06 02:45:52,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:45:52,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810574408] [2021-05-06 02:45:52,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:45:52,101 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:45:52,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214681476] [2021-05-06 02:45:52,102 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 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