/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:24:29,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:24:29,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:24:30,026 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:24:30,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:24:30,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:24:30,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:24:30,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:24:30,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:24:30,044 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:24:30,045 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:24:30,064 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:24:30,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:24:30,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:24:30,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:24:30,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:24:30,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:24:30,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:24:30,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:24:30,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:24:30,081 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 02:24:30,097 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:24:30,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:24:30,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:24:30,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:24:30,098 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:24:30,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:24:30,099 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:24:30,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:24:30,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:24:30,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:24:30,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:24:30,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:24:30,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:24:30,099 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:24:30,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:24:30,100 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:24:30,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:24:30,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:24:30,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:24:30,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:24:30,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:24:30,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:24:30,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:24:30,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:24:30,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:24:30,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:24:30,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:24:30,101 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:24:30,101 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:24:30,381 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:24:30,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:24:30,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:24:30,402 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:24:30,402 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:24:30,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c [2021-05-06 02:24:30,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d9940082/b1db1472baab4039a821133bae25e96a/FLAGd3fba041b [2021-05-06 02:24:30,816 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:24:30,817 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c [2021-05-06 02:24:30,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d9940082/b1db1472baab4039a821133bae25e96a/FLAGd3fba041b [2021-05-06 02:24:31,240 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d9940082/b1db1472baab4039a821133bae25e96a [2021-05-06 02:24:31,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:24:31,243 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:24:31,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:24:31,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:24:31,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:24:31,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:24:31" (1/1) ... [2021-05-06 02:24:31,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f82f458 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:24:31, skipping insertion in model container [2021-05-06 02:24:31,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:24:31" (1/1) ... [2021-05-06 02:24:31,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:24:31,263 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:24:31,340 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c[489,502] [2021-05-06 02:24:31,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:24:31,357 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:24:31,396 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c[489,502] [2021-05-06 02:24:31,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:24:31,413 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:24:31,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:24:31 WrapperNode [2021-05-06 02:24:31,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:24:31,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:24:31,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:24:31,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:24:31,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:24:31" (1/1) ... [2021-05-06 02:24:31,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:24:31" (1/1) ... [2021-05-06 02:24:31,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:24:31" (1/1) ... [2021-05-06 02:24:31,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:24:31" (1/1) ... [2021-05-06 02:24:31,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:24:31" (1/1) ... [2021-05-06 02:24:31,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:24:31" (1/1) ... [2021-05-06 02:24:31,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:24:31" (1/1) ... [2021-05-06 02:24:31,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:24:31,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:24:31,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:24:31,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:24:31,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:24:31" (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 02:24:31,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:24:31,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:24:31,597 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:24:31,597 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:24:31,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:24:31,597 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:24:31,597 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:24:31,598 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:24:31,598 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:24:31,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:24:31,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:24:31,598 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:24:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:24:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:24:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:24:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:24:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:24:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:24:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:24:31,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:24:31,858 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:24:31,858 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:24:31,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:24:31 BoogieIcfgContainer [2021-05-06 02:24:31,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:24:31,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:24:31,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:24:31,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:24:31,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:24:31" (1/3) ... [2021-05-06 02:24:31,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48851927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:24:31, skipping insertion in model container [2021-05-06 02:24:31,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:24:31" (2/3) ... [2021-05-06 02:24:31,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48851927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:24:31, skipping insertion in model container [2021-05-06 02:24:31,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:24:31" (3/3) ... [2021-05-06 02:24:31,864 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound5.c [2021-05-06 02:24:31,869 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:24:31,872 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:24:31,884 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:24:31,917 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:24:31,917 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:24:31,917 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:24:31,917 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:24:31,917 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:24:31,917 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:24:31,917 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:24:31,917 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:24:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:24:31,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 02:24:31,934 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:31,935 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 02:24:31,935 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:31,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2021-05-06 02:24:31,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:31,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832596177] [2021-05-06 02:24:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:32,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:24:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:32,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:24:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:32,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:24:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:32,193 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 02:24:32,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:32,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832596177] [2021-05-06 02:24:32,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832596177] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:24:32,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:24:32,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:24:32,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120180984] [2021-05-06 02:24:32,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:24:32,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:32,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:24:32,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:24:32,208 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 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 02:24:32,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:32,348 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2021-05-06 02:24:32,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:24:32,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 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 02:24:32,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:32,361 INFO L225 Difference]: With dead ends: 64 [2021-05-06 02:24:32,361 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 02:24:32,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:24:32,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 02:24:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-06 02:24:32,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:24:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 02:24:32,388 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-06 02:24:32,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:32,389 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 02:24:32,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 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 02:24:32,389 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 02:24:32,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:24:32,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:32,390 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 02:24:32,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:24:32,390 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:32,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:32,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2021-05-06 02:24:32,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:32,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240718388] [2021-05-06 02:24:32,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:32,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:24:32,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:32,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:24:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:32,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:24:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:32,565 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 02:24:32,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:32,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240718388] [2021-05-06 02:24:32,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240718388] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:24:32,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:24:32,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:24:32,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480993802] [2021-05-06 02:24:32,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:24:32,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:32,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:24:32,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:24:32,567 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:24:32,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:32,738 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-05-06 02:24:32,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:24:32,739 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 02:24:32,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:32,740 INFO L225 Difference]: With dead ends: 42 [2021-05-06 02:24:32,740 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 02:24:32,742 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:24:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 02:24:32,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 02:24:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:24:32,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 02:24:32,749 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-06 02:24:32,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:32,750 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 02:24:32,750 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), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:24:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 02:24:32,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:24:32,750 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:32,751 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 02:24:32,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 02:24:32,751 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:32,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:32,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2021-05-06 02:24:32,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:32,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611750270] [2021-05-06 02:24:32,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:32,761 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:32,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613233258] [2021-05-06 02:24:32,762 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 02:24:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:32,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:24:32,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:32,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:32,997 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 02:24:32,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:32,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611750270] [2021-05-06 02:24:32,998 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:32,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613233258] [2021-05-06 02:24:32,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613233258] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:24:32,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:24:32,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:24:32,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151256286] [2021-05-06 02:24:32,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:24:32,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:32,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:24:32,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:24:32,999 INFO L87 Difference]: Start difference. First operand 32 states and 41 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 02:24:33,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:33,051 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-05-06 02:24:33,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:24:33,051 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 02:24:33,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:33,052 INFO L225 Difference]: With dead ends: 49 [2021-05-06 02:24:33,052 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 02:24:33,053 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:24:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 02:24:33,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-06 02:24:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:24:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-06 02:24:33,060 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-06 02:24:33,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:33,061 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-06 02:24:33,061 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 02:24:33,061 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-06 02:24:33,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 02:24:33,061 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:33,061 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] [2021-05-06 02:24:33,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 02:24:33,278 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:33,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:33,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2021-05-06 02:24:33,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:33,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819979332] [2021-05-06 02:24:33,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:33,287 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:33,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540662468] [2021-05-06 02:24:33,287 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 02:24:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:33,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:24:33,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:33,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:33,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:33,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:33,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:33,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:24:33,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:33,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819979332] [2021-05-06 02:24:33,512 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:33,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540662468] [2021-05-06 02:24:33,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540662468] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:24:33,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:24:33,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 02:24:33,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085083300] [2021-05-06 02:24:33,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:24:33,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:33,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:24:33,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:24:33,514 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:24:33,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:33,634 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2021-05-06 02:24:33,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:24:33,634 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 02:24:33,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:33,639 INFO L225 Difference]: With dead ends: 71 [2021-05-06 02:24:33,639 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 02:24:33,640 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:24:33,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 02:24:33,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-06 02:24:33,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:24:33,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-06 02:24:33,653 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-06 02:24:33,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:33,653 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-06 02:24:33,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:24:33,653 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-06 02:24:33,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:24:33,654 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:33,654 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:33,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:33,869 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:33,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:33,870 INFO L82 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2021-05-06 02:24:33,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:33,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906037363] [2021-05-06 02:24:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:33,882 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:33,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096279052] [2021-05-06 02:24:33,883 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 02:24:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:33,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:24:33,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:34,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 02:24:34,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:34,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906037363] [2021-05-06 02:24:34,057 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:34,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096279052] [2021-05-06 02:24:34,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096279052] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:24:34,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:24:34,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:24:34,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137442588] [2021-05-06 02:24:34,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:24:34,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:34,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:24:34,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:24:34,059 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:24:34,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:34,107 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2021-05-06 02:24:34,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:24:34,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 02:24:34,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:34,108 INFO L225 Difference]: With dead ends: 69 [2021-05-06 02:24:34,108 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 02:24:34,109 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:24:34,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 02:24:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 02:24:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 02:24:34,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-06 02:24:34,116 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-06 02:24:34,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:34,116 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-06 02:24:34,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:24:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-06 02:24:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 02:24:34,122 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:34,122 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:34,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:34,341 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:34,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:34,341 INFO L82 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2021-05-06 02:24:34,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:34,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879536128] [2021-05-06 02:24:34,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:34,349 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:34,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1001522838] [2021-05-06 02:24:34,349 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 02:24:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:34,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:24:34,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:34,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:24:34,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:34,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879536128] [2021-05-06 02:24:34,499 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:34,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001522838] [2021-05-06 02:24:34,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001522838] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:24:34,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:24:34,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:24:34,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502343254] [2021-05-06 02:24:34,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:24:34,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:34,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:24:34,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:24:34,500 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 02:24:34,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:34,536 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2021-05-06 02:24:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:24:34,536 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-05-06 02:24:34,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:34,537 INFO L225 Difference]: With dead ends: 77 [2021-05-06 02:24:34,537 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 02:24:34,538 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:24:34,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 02:24:34,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-06 02:24:34,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 43 states have internal predecessors, (51), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:24:34,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-06 02:24:34,545 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-06 02:24:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:34,546 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-06 02:24:34,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 02:24:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-06 02:24:34,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:24:34,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:34,547 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:34,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:34,753 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:34,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:34,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2021-05-06 02:24:34,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:34,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703016325] [2021-05-06 02:24:34,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:34,762 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:34,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86159533] [2021-05-06 02:24:34,762 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 02:24:34,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:34,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:24:34,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:34,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:34,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:34,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:34,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:34,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:34,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:34,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:34,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:34,907 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:24:34,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:34,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703016325] [2021-05-06 02:24:34,908 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:34,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86159533] [2021-05-06 02:24:34,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86159533] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:34,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:34,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 02:24:34,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907589107] [2021-05-06 02:24:34,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:24:34,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:34,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:24:34,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:24:34,909 INFO L87 Difference]: Start difference. First operand 71 states and 96 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, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:24:34,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:34,958 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2021-05-06 02:24:34,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:24:34,958 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, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 02:24:34,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:34,959 INFO L225 Difference]: With dead ends: 111 [2021-05-06 02:24:34,959 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 02:24:34,960 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:24:34,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 02:24:34,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-06 02:24:34,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 61 states have internal predecessors, (69), 26 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 02:24:34,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-05-06 02:24:34,969 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 42 [2021-05-06 02:24:34,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:34,969 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-05-06 02:24:34,969 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, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:24:34,969 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-05-06 02:24:34,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:24:34,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:34,970 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:35,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 02:24:35,185 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:35,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:35,185 INFO L82 PathProgramCache]: Analyzing trace with hash 691597660, now seen corresponding path program 1 times [2021-05-06 02:24:35,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:35,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375758793] [2021-05-06 02:24:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:35,201 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:35,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58629511] [2021-05-06 02:24:35,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:35,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:24:35,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:35,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:24:35,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:35,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375758793] [2021-05-06 02:24:35,370 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:35,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58629511] [2021-05-06 02:24:35,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58629511] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:24:35,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:24:35,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:24:35,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421880593] [2021-05-06 02:24:35,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:24:35,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:35,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:24:35,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:24:35,371 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:24:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:35,413 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2021-05-06 02:24:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:24:35,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2021-05-06 02:24:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:35,414 INFO L225 Difference]: With dead ends: 106 [2021-05-06 02:24:35,415 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 02:24:35,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:24:35,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 02:24:35,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-06 02:24:35,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 02:24:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 02:24:35,423 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-05-06 02:24:35,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:35,423 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 02:24:35,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:24:35,424 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 02:24:35,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 02:24:35,424 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:35,424 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:35,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:35,636 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:35,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:35,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2021-05-06 02:24:35,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:35,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216241447] [2021-05-06 02:24:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:35,642 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:35,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453987030] [2021-05-06 02:24:35,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:35,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 02:24:35,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:35,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:35,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:35,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:24:35,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:35,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216241447] [2021-05-06 02:24:35,814 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:35,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453987030] [2021-05-06 02:24:35,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453987030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:35,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:35,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:24:35,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639052425] [2021-05-06 02:24:35,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:24:35,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:35,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:24:35,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:24:35,815 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:24:35,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:35,922 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2021-05-06 02:24:35,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:24:35,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 02:24:35,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:35,924 INFO L225 Difference]: With dead ends: 118 [2021-05-06 02:24:35,924 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 02:24:35,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:24:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 02:24:35,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-05-06 02:24:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 02:24:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-05-06 02:24:35,949 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2021-05-06 02:24:35,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:35,949 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-05-06 02:24:35,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:24:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-05-06 02:24:35,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:24:35,950 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:35,950 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:36,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:36,151 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:36,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:36,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 1 times [2021-05-06 02:24:36,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:36,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902497413] [2021-05-06 02:24:36,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:36,157 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:36,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174417517] [2021-05-06 02:24:36,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:36,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:36,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 02:24:36,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:36,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:36,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:36,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:36,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:36,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:36,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:36,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:36,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:36,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:36,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:36,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:36,337 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 02:24:36,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:36,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902497413] [2021-05-06 02:24:36,338 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:36,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174417517] [2021-05-06 02:24:36,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174417517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:36,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:36,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:24:36,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353879923] [2021-05-06 02:24:36,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:24:36,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:36,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:24:36,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:24:36,339 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:24:36,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:36,466 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2021-05-06 02:24:36,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:24:36,467 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2021-05-06 02:24:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:36,467 INFO L225 Difference]: With dead ends: 131 [2021-05-06 02:24:36,467 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 02:24:36,468 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:24:36,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 02:24:36,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-05-06 02:24:36,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 02:24:36,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-05-06 02:24:36,477 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2021-05-06 02:24:36,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:36,477 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-05-06 02:24:36,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:24:36,477 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-05-06 02:24:36,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 02:24:36,478 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:36,478 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:36,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 02:24:36,693 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:36,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:36,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2021-05-06 02:24:36,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:36,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463242188] [2021-05-06 02:24:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:36,702 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:36,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964640203] [2021-05-06 02:24:36,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:36,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:24:36,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:36,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 02:24:36,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:36,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-06 02:24:36,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:36,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463242188] [2021-05-06 02:24:36,893 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:36,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964640203] [2021-05-06 02:24:36,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964640203] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:36,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:36,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:24:36,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128294638] [2021-05-06 02:24:36,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:24:36,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:36,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:24:36,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:24:36,895 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:24:37,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:37,060 INFO L93 Difference]: Finished difference Result 151 states and 203 transitions. [2021-05-06 02:24:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:24:37,061 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2021-05-06 02:24:37,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:37,062 INFO L225 Difference]: With dead ends: 151 [2021-05-06 02:24:37,062 INFO L226 Difference]: Without dead ends: 145 [2021-05-06 02:24:37,062 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:24:37,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-06 02:24:37,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-06 02:24:37,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 90 states have internal predecessors, (100), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 02:24:37,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-05-06 02:24:37,072 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 52 [2021-05-06 02:24:37,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:37,073 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-05-06 02:24:37,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:24:37,073 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-05-06 02:24:37,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:24:37,073 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:37,074 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:37,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:37,293 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:37,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:37,293 INFO L82 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 2 times [2021-05-06 02:24:37,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:37,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267482476] [2021-05-06 02:24:37,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:37,311 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:37,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456541145] [2021-05-06 02:24:37,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:37,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:24:37,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:37,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:24:37,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:37,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:37,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:37,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:37,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:37,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:37,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:37,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:37,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:37,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:37,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:37,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 02:24:37,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:37,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267482476] [2021-05-06 02:24:37,465 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:37,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456541145] [2021-05-06 02:24:37,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456541145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:37,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:37,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:24:37,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227676045] [2021-05-06 02:24:37,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:24:37,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:37,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:24:37,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:24:37,466 INFO L87 Difference]: Start difference. First operand 145 states and 192 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, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:24:37,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:37,516 INFO L93 Difference]: Finished difference Result 199 states and 251 transitions. [2021-05-06 02:24:37,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:24:37,517 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, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-06 02:24:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:37,518 INFO L225 Difference]: With dead ends: 199 [2021-05-06 02:24:37,518 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 02:24:37,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:24:37,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 02:24:37,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-06 02:24:37,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 02:24:37,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2021-05-06 02:24:37,527 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2021-05-06 02:24:37,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:37,528 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2021-05-06 02:24:37,528 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, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:24:37,528 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2021-05-06 02:24:37,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:24:37,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:37,529 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 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 02:24:37,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:37,745 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:37,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:37,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 1 times [2021-05-06 02:24:37,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:37,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911513848] [2021-05-06 02:24:37,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:37,751 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:37,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724850085] [2021-05-06 02:24:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order 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 02:24:37,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:37,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:24:37,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:37,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 02:24:37,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:37,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911513848] [2021-05-06 02:24:37,919 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:37,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724850085] [2021-05-06 02:24:37,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724850085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:37,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:37,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:24:37,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589372247] [2021-05-06 02:24:37,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:24:37,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:37,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:24:37,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:24:37,932 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:24:38,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:38,015 INFO L93 Difference]: Finished difference Result 188 states and 237 transitions. [2021-05-06 02:24:38,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:24:38,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2021-05-06 02:24:38,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:38,017 INFO L225 Difference]: With dead ends: 188 [2021-05-06 02:24:38,017 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 02:24:38,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:24:38,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 02:24:38,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-05-06 02:24:38,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 118 states have internal predecessors, (128), 54 states have call successors, (54), 22 states have call predecessors, (54), 21 states have return successors, (50), 43 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 02:24:38,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-06 02:24:38,031 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 61 [2021-05-06 02:24:38,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:38,032 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-06 02:24:38,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:24:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-06 02:24:38,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:24:38,032 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:38,032 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 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 02:24:38,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:24:38,245 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:38,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:38,245 INFO L82 PathProgramCache]: Analyzing trace with hash 284565575, now seen corresponding path program 2 times [2021-05-06 02:24:38,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:38,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764272842] [2021-05-06 02:24:38,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:38,250 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:38,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515814490] [2021-05-06 02:24:38,251 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 02:24:38,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:24:38,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:38,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:24:38,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:38,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 02:24:38,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:38,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764272842] [2021-05-06 02:24:38,421 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:38,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515814490] [2021-05-06 02:24:38,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515814490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:38,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:38,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:24:38,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393082668] [2021-05-06 02:24:38,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:24:38,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:38,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:24:38,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:24:38,422 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:24:38,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:38,497 INFO L93 Difference]: Finished difference Result 198 states and 252 transitions. [2021-05-06 02:24:38,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:24:38,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2021-05-06 02:24:38,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:38,498 INFO L225 Difference]: With dead ends: 198 [2021-05-06 02:24:38,498 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 02:24:38,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:24:38,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 02:24:38,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-06 02:24:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 122 states have internal predecessors, (132), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (53), 46 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-06 02:24:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 242 transitions. [2021-05-06 02:24:38,509 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 242 transitions. Word has length 61 [2021-05-06 02:24:38,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:38,510 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 242 transitions. [2021-05-06 02:24:38,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:24:38,510 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 242 transitions. [2021-05-06 02:24:38,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 02:24:38,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:38,511 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:38,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:24:38,728 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:38,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:38,728 INFO L82 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 2 times [2021-05-06 02:24:38,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:38,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958438223] [2021-05-06 02:24:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:38,733 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:38,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407699749] [2021-05-06 02:24:38,734 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 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 02:24:38,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:24:38,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:38,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:24:38,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:38,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:38,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:39,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-06 02:24:39,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:39,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958438223] [2021-05-06 02:24:39,012 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:39,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407699749] [2021-05-06 02:24:39,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407699749] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:39,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:39,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:24:39,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708272393] [2021-05-06 02:24:39,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:24:39,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:39,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:24:39,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:24:39,014 INFO L87 Difference]: Start difference. First operand 192 states and 242 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:24:39,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:39,266 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2021-05-06 02:24:39,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:24:39,266 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-06 02:24:39,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:39,268 INFO L225 Difference]: With dead ends: 219 [2021-05-06 02:24:39,268 INFO L226 Difference]: Without dead ends: 217 [2021-05-06 02:24:39,269 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:24:39,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-06 02:24:39,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 212. [2021-05-06 02:24:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 134 states have internal predecessors, (148), 63 states have call successors, (63), 25 states have call predecessors, (63), 24 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:24:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2021-05-06 02:24:39,284 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 66 [2021-05-06 02:24:39,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:39,284 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2021-05-06 02:24:39,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:24:39,284 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2021-05-06 02:24:39,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 02:24:39,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:39,284 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 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 02:24:39,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 02:24:39,497 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:39,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:39,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 3 times [2021-05-06 02:24:39,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:39,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125607328] [2021-05-06 02:24:39,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:39,502 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:39,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449438772] [2021-05-06 02:24:39,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:39,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:24:39,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:39,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 02:24:39,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:39,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:39,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:39,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:39,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:39,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:39,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:39,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:39,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:39,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:39,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:39,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 02:24:39,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:39,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125607328] [2021-05-06 02:24:39,724 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:39,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449438772] [2021-05-06 02:24:39,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449438772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:39,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:39,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:24:39,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987739764] [2021-05-06 02:24:39,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:24:39,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:39,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:24:39,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:24:39,725 INFO L87 Difference]: Start difference. First operand 212 states and 270 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:24:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:39,852 INFO L93 Difference]: Finished difference Result 235 states and 302 transitions. [2021-05-06 02:24:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:24:39,852 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-06 02:24:39,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:39,853 INFO L225 Difference]: With dead ends: 235 [2021-05-06 02:24:39,853 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 02:24:39,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:24:39,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 02:24:39,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2021-05-06 02:24:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 138 states have internal predecessors, (153), 63 states have call successors, (63), 26 states have call predecessors, (63), 25 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:24:39,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 275 transitions. [2021-05-06 02:24:39,867 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 275 transitions. Word has length 66 [2021-05-06 02:24:39,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:39,867 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 275 transitions. [2021-05-06 02:24:39,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:24:39,868 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 275 transitions. [2021-05-06 02:24:39,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 02:24:39,869 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:39,869 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:40,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:40,085 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:40,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:40,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 4 times [2021-05-06 02:24:40,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:40,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870895569] [2021-05-06 02:24:40,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:40,101 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:40,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045794979] [2021-05-06 02:24:40,101 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 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 02:24:40,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:24:40,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:40,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 02:24:40,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:40,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 47 proven. 25 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-05-06 02:24:40,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:40,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870895569] [2021-05-06 02:24:40,454 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:40,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045794979] [2021-05-06 02:24:40,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045794979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:40,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:40,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:24:40,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769533586] [2021-05-06 02:24:40,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:24:40,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:40,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:24:40,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:24:40,457 INFO L87 Difference]: Start difference. First operand 217 states and 275 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 02:24:40,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:40,759 INFO L93 Difference]: Finished difference Result 242 states and 310 transitions. [2021-05-06 02:24:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:24:40,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 02:24:40,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:40,760 INFO L225 Difference]: With dead ends: 242 [2021-05-06 02:24:40,760 INFO L226 Difference]: Without dead ends: 235 [2021-05-06 02:24:40,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 155.6ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:24:40,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-06 02:24:40,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2021-05-06 02:24:40,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 115 states have (on average 1.182608695652174) internal successors, (136), 124 states have internal predecessors, (136), 54 states have call successors, (54), 24 states have call predecessors, (54), 23 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 02:24:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 240 transitions. [2021-05-06 02:24:40,772 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 240 transitions. Word has length 71 [2021-05-06 02:24:40,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:40,772 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 240 transitions. [2021-05-06 02:24:40,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 02:24:40,772 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 240 transitions. [2021-05-06 02:24:40,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 02:24:40,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:40,773 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:40,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:24:40,990 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:40,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:40,990 INFO L82 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 3 times [2021-05-06 02:24:40,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:40,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82228498] [2021-05-06 02:24:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:40,997 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:40,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1414705138] [2021-05-06 02:24:40,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:41,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:24:41,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:41,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 02:24:41,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:41,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-06 02:24:41,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:41,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82228498] [2021-05-06 02:24:41,219 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:41,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414705138] [2021-05-06 02:24:41,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414705138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:41,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:41,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:24:41,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995702931] [2021-05-06 02:24:41,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:24:41,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:41,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:24:41,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:24:41,220 INFO L87 Difference]: Start difference. First operand 193 states and 240 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:24:41,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:41,538 INFO L93 Difference]: Finished difference Result 229 states and 292 transitions. [2021-05-06 02:24:41,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:24:41,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2021-05-06 02:24:41,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:41,540 INFO L225 Difference]: With dead ends: 229 [2021-05-06 02:24:41,540 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 02:24:41,540 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:24:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 02:24:41,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2021-05-06 02:24:41,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 139 states have internal predecessors, (155), 60 states have call successors, (60), 27 states have call predecessors, (60), 26 states have return successors, (56), 50 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-06 02:24:41,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 271 transitions. [2021-05-06 02:24:41,550 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 271 transitions. Word has length 71 [2021-05-06 02:24:41,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:41,551 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 271 transitions. [2021-05-06 02:24:41,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:24:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 271 transitions. [2021-05-06 02:24:41,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:24:41,551 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:41,551 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 3, 3, 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 02:24:41,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:24:41,770 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:41,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:41,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 3 times [2021-05-06 02:24:41,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:41,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477718596] [2021-05-06 02:24:41,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:41,775 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:41,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054338023] [2021-05-06 02:24:41,775 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 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 02:24:41,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:24:41,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:41,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:24:41,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:41,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:41,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:41,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:41,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:41,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:41,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:41,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:41,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:41,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:41,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:41,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:41,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:41,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:41,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 02:24:41,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:41,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477718596] [2021-05-06 02:24:41,949 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:41,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054338023] [2021-05-06 02:24:41,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054338023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:41,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:41,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:24:41,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183426964] [2021-05-06 02:24:41,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:24:41,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:41,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:24:41,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:24:41,951 INFO L87 Difference]: Start difference. First operand 217 states and 271 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, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:24:42,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:42,015 INFO L93 Difference]: Finished difference Result 269 states and 330 transitions. [2021-05-06 02:24:42,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:24:42,015 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, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-06 02:24:42,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:42,016 INFO L225 Difference]: With dead ends: 269 [2021-05-06 02:24:42,017 INFO L226 Difference]: Without dead ends: 243 [2021-05-06 02:24:42,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:24:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-06 02:24:42,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2021-05-06 02:24:42,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 152 states have internal predecessors, (165), 57 states have call successors, (57), 30 states have call predecessors, (57), 29 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-06 02:24:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 275 transitions. [2021-05-06 02:24:42,045 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 275 transitions. Word has length 80 [2021-05-06 02:24:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:42,046 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 275 transitions. [2021-05-06 02:24:42,046 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, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:24:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 275 transitions. [2021-05-06 02:24:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:24:42,047 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:42,047 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:42,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:42,261 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:42,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:42,261 INFO L82 PathProgramCache]: Analyzing trace with hash -122098436, now seen corresponding path program 5 times [2021-05-06 02:24:42,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:42,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754585259] [2021-05-06 02:24:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:42,270 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:42,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28773921] [2021-05-06 02:24:42,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:42,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 02:24:42,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:42,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:24:42,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:42,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-06 02:24:42,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:42,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754585259] [2021-05-06 02:24:42,748 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:42,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28773921] [2021-05-06 02:24:42,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28773921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:42,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:42,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:24:42,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642868937] [2021-05-06 02:24:42,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:24:42,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:42,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:24:42,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:24:42,749 INFO L87 Difference]: Start difference. First operand 230 states and 275 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:24:42,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:42,823 INFO L93 Difference]: Finished difference Result 266 states and 328 transitions. [2021-05-06 02:24:42,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:24:42,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 80 [2021-05-06 02:24:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:42,824 INFO L225 Difference]: With dead ends: 266 [2021-05-06 02:24:42,824 INFO L226 Difference]: Without dead ends: 264 [2021-05-06 02:24:42,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:24:42,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-06 02:24:42,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 250. [2021-05-06 02:24:42,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 163 states have internal predecessors, (177), 67 states have call successors, (67), 31 states have call predecessors, (67), 30 states have return successors, (63), 55 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 02:24:42,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 307 transitions. [2021-05-06 02:24:42,836 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 307 transitions. Word has length 80 [2021-05-06 02:24:42,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:42,838 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 307 transitions. [2021-05-06 02:24:42,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:24:42,838 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 307 transitions. [2021-05-06 02:24:42,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:24:42,838 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:42,838 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:43,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:43,046 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:43,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:43,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1835066184, now seen corresponding path program 6 times [2021-05-06 02:24:43,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:43,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85356949] [2021-05-06 02:24:43,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:43,051 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:43,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890225702] [2021-05-06 02:24:43,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:43,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-06 02:24:43,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:43,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 02:24:43,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:43,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 52 proven. 7 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-05-06 02:24:43,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:43,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85356949] [2021-05-06 02:24:43,238 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:43,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890225702] [2021-05-06 02:24:43,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890225702] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:43,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:43,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:24:43,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577425853] [2021-05-06 02:24:43,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:24:43,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:43,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:24:43,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:24:43,240 INFO L87 Difference]: Start difference. First operand 250 states and 307 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:24:43,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:43,304 INFO L93 Difference]: Finished difference Result 256 states and 312 transitions. [2021-05-06 02:24:43,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:24:43,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 80 [2021-05-06 02:24:43,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:43,305 INFO L225 Difference]: With dead ends: 256 [2021-05-06 02:24:43,305 INFO L226 Difference]: Without dead ends: 251 [2021-05-06 02:24:43,306 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:24:43,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-06 02:24:43,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 249. [2021-05-06 02:24:43,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 155 states have (on average 1.1548387096774193) internal successors, (179), 164 states have internal predecessors, (179), 62 states have call successors, (62), 32 states have call predecessors, (62), 31 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:24:43,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 300 transitions. [2021-05-06 02:24:43,319 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 300 transitions. Word has length 80 [2021-05-06 02:24:43,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:43,320 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 300 transitions. [2021-05-06 02:24:43,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:24:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 300 transitions. [2021-05-06 02:24:43,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:24:43,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:43,321 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:43,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:43,541 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:43,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:43,541 INFO L82 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 3 times [2021-05-06 02:24:43,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:43,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762459026] [2021-05-06 02:24:43,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:43,551 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:43,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344405388] [2021-05-06 02:24:43,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:43,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:24:43,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:43,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:24:43,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:43,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 02:24:43,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:43,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762459026] [2021-05-06 02:24:43,792 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:43,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344405388] [2021-05-06 02:24:43,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344405388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:43,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:43,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:24:43,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643195704] [2021-05-06 02:24:43,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:24:43,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:43,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:24:43,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:24:43,794 INFO L87 Difference]: Start difference. First operand 249 states and 300 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:24:44,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:44,122 INFO L93 Difference]: Finished difference Result 286 states and 358 transitions. [2021-05-06 02:24:44,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:24:44,123 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 02:24:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:44,124 INFO L225 Difference]: With dead ends: 286 [2021-05-06 02:24:44,124 INFO L226 Difference]: Without dead ends: 284 [2021-05-06 02:24:44,124 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:24:44,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-06 02:24:44,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 260. [2021-05-06 02:24:44,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 162 states have (on average 1.1604938271604939) internal successors, (188), 171 states have internal predecessors, (188), 65 states have call successors, (65), 33 states have call predecessors, (65), 32 states have return successors, (62), 55 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:24:44,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 315 transitions. [2021-05-06 02:24:44,137 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 315 transitions. Word has length 85 [2021-05-06 02:24:44,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:44,138 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 315 transitions. [2021-05-06 02:24:44,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:24:44,138 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 315 transitions. [2021-05-06 02:24:44,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:24:44,138 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:44,138 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:44,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 02:24:44,355 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:44,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:44,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 7 times [2021-05-06 02:24:44,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:44,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573328323] [2021-05-06 02:24:44,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:44,360 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:44,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066973109] [2021-05-06 02:24:44,360 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 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 02:24:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:24:44,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 02:24:44,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:44,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 02:24:44,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:44,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573328323] [2021-05-06 02:24:44,653 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:44,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066973109] [2021-05-06 02:24:44,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066973109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:44,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:44,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:24:44,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155391575] [2021-05-06 02:24:44,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:24:44,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:44,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:24:44,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:24:44,654 INFO L87 Difference]: Start difference. First operand 260 states and 315 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:24:45,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:45,146 INFO L93 Difference]: Finished difference Result 308 states and 376 transitions. [2021-05-06 02:24:45,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:24:45,147 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 02:24:45,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:45,148 INFO L225 Difference]: With dead ends: 308 [2021-05-06 02:24:45,148 INFO L226 Difference]: Without dead ends: 306 [2021-05-06 02:24:45,148 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:24:45,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-06 02:24:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 301. [2021-05-06 02:24:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 189 states have (on average 1.164021164021164) internal successors, (220), 198 states have internal predecessors, (220), 74 states have call successors, (74), 38 states have call predecessors, (74), 37 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 02:24:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 365 transitions. [2021-05-06 02:24:45,163 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 365 transitions. Word has length 85 [2021-05-06 02:24:45,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:45,163 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 365 transitions. [2021-05-06 02:24:45,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:24:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 365 transitions. [2021-05-06 02:24:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:24:45,164 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:45,164 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:45,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 02:24:45,381 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:45,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:45,381 INFO L82 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 8 times [2021-05-06 02:24:45,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:45,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163317481] [2021-05-06 02:24:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:45,386 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:45,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968279896] [2021-05-06 02:24:45,386 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 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 02:24:45,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:24:45,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:45,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 02:24:45,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:45,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 59 proven. 57 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-06 02:24:45,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:45,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163317481] [2021-05-06 02:24:45,677 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:45,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968279896] [2021-05-06 02:24:45,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968279896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:45,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:45,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:24:45,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926466111] [2021-05-06 02:24:45,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:24:45,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:45,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:24:45,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:24:45,678 INFO L87 Difference]: Start difference. First operand 301 states and 365 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:24:46,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:46,256 INFO L93 Difference]: Finished difference Result 330 states and 406 transitions. [2021-05-06 02:24:46,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:24:46,257 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 02:24:46,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:46,258 INFO L225 Difference]: With dead ends: 330 [2021-05-06 02:24:46,258 INFO L226 Difference]: Without dead ends: 328 [2021-05-06 02:24:46,259 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:24:46,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-06 02:24:46,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 282. [2021-05-06 02:24:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 176 states have (on average 1.1704545454545454) internal successors, (206), 185 states have internal predecessors, (206), 71 states have call successors, (71), 35 states have call predecessors, (71), 34 states have return successors, (68), 61 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-06 02:24:46,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 345 transitions. [2021-05-06 02:24:46,276 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 345 transitions. Word has length 85 [2021-05-06 02:24:46,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:46,276 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 345 transitions. [2021-05-06 02:24:46,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:24:46,276 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 345 transitions. [2021-05-06 02:24:46,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:24:46,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:46,277 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:46,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:46,493 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:46,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:46,494 INFO L82 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 9 times [2021-05-06 02:24:46,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:46,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798364437] [2021-05-06 02:24:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:46,504 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:46,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473796181] [2021-05-06 02:24:46,504 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 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 02:24:46,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:24:46,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:46,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 02:24:46,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:46,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 70 proven. 14 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-06 02:24:46,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:46,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798364437] [2021-05-06 02:24:46,713 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:46,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473796181] [2021-05-06 02:24:46,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473796181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:46,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:46,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:24:46,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090214199] [2021-05-06 02:24:46,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:24:46,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:46,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:24:46,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:24:46,716 INFO L87 Difference]: Start difference. First operand 282 states and 345 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:24:47,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:47,141 INFO L93 Difference]: Finished difference Result 346 states and 441 transitions. [2021-05-06 02:24:47,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:24:47,142 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 85 [2021-05-06 02:24:47,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:47,143 INFO L225 Difference]: With dead ends: 346 [2021-05-06 02:24:47,143 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 02:24:47,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:24:47,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 02:24:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 298. [2021-05-06 02:24:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 185 states have (on average 1.1675675675675676) internal successors, (216), 195 states have internal predecessors, (216), 76 states have call successors, (76), 37 states have call predecessors, (76), 36 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 02:24:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 364 transitions. [2021-05-06 02:24:47,165 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 364 transitions. Word has length 85 [2021-05-06 02:24:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:47,165 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 364 transitions. [2021-05-06 02:24:47,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:24:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 364 transitions. [2021-05-06 02:24:47,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 02:24:47,166 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:47,166 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:47,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 02:24:47,385 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:47,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:47,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 10 times [2021-05-06 02:24:47,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:47,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008659929] [2021-05-06 02:24:47,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:47,393 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:47,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [94639956] [2021-05-06 02:24:47,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 02:24:47,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:24:47,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:47,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 02:24:47,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:47,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 27 proven. 61 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-05-06 02:24:47,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:47,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008659929] [2021-05-06 02:24:47,652 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:47,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94639956] [2021-05-06 02:24:47,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94639956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:47,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:47,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:24:47,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491358779] [2021-05-06 02:24:47,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:24:47,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:47,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:24:47,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:24:47,655 INFO L87 Difference]: Start difference. First operand 298 states and 364 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:24:48,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:48,078 INFO L93 Difference]: Finished difference Result 325 states and 409 transitions. [2021-05-06 02:24:48,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:24:48,078 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-06 02:24:48,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:48,079 INFO L225 Difference]: With dead ends: 325 [2021-05-06 02:24:48,080 INFO L226 Difference]: Without dead ends: 316 [2021-05-06 02:24:48,080 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:24:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-06 02:24:48,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 314. [2021-05-06 02:24:48,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 194 states have (on average 1.175257731958763) internal successors, (228), 204 states have internal predecessors, (228), 82 states have call successors, (82), 38 states have call predecessors, (82), 37 states have return successors, (78), 71 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-06 02:24:48,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 388 transitions. [2021-05-06 02:24:48,097 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 388 transitions. Word has length 90 [2021-05-06 02:24:48,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:48,097 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 388 transitions. [2021-05-06 02:24:48,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:24:48,098 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 388 transitions. [2021-05-06 02:24:48,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 02:24:48,098 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:48,098 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:48,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:24:48,313 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:48,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:48,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 11 times [2021-05-06 02:24:48,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:48,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316707333] [2021-05-06 02:24:48,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:48,319 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:48,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2124205551] [2021-05-06 02:24:48,319 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 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 02:24:49,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 02:24:49,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:49,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 02:24:49,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:49,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 02:24:49,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:49,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316707333] [2021-05-06 02:24:49,628 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:49,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124205551] [2021-05-06 02:24:49,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124205551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:49,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:49,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:24:49,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58687290] [2021-05-06 02:24:49,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:24:49,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:49,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:24:49,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:24:49,629 INFO L87 Difference]: Start difference. First operand 314 states and 388 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:24:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:24:50,015 INFO L93 Difference]: Finished difference Result 359 states and 449 transitions. [2021-05-06 02:24:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:24:50,016 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-06 02:24:50,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:24:50,017 INFO L225 Difference]: With dead ends: 359 [2021-05-06 02:24:50,017 INFO L226 Difference]: Without dead ends: 353 [2021-05-06 02:24:50,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:24:50,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-06 02:24:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 337. [2021-05-06 02:24:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 209 states have (on average 1.167464114832536) internal successors, (244), 220 states have internal predecessors, (244), 87 states have call successors, (87), 41 states have call predecessors, (87), 40 states have return successors, (83), 75 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 02:24:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 414 transitions. [2021-05-06 02:24:50,036 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 414 transitions. Word has length 90 [2021-05-06 02:24:50,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:24:50,036 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 414 transitions. [2021-05-06 02:24:50,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:24:50,036 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 414 transitions. [2021-05-06 02:24:50,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 02:24:50,037 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:24:50,037 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:24:50,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 02:24:50,245 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:24:50,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:24:50,245 INFO L82 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 12 times [2021-05-06 02:24:50,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:24:50,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076174156] [2021-05-06 02:24:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:24:50,250 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:24:50,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902042938] [2021-05-06 02:24:50,250 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 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 02:24:50,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 02:24:50,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:24:50,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:24:50,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:24:50,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:50,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:50,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:50,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:53,906 WARN L205 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-06 02:24:53,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:53,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:53,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:24:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 67 proven. 56 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-06 02:24:53,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:24:53,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076174156] [2021-05-06 02:24:53,936 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:24:53,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902042938] [2021-05-06 02:24:53,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902042938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:24:53,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:24:53,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:24:53,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236322980] [2021-05-06 02:24:53,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:24:53,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:24:53,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:24:53,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:24:53,938 INFO L87 Difference]: Start difference. First operand 337 states and 414 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:25:54,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:25:54,675 INFO L93 Difference]: Finished difference Result 401 states and 512 transitions. [2021-05-06 02:25:54,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:25:54,676 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 90 [2021-05-06 02:25:54,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:25:54,677 INFO L225 Difference]: With dead ends: 401 [2021-05-06 02:25:54,677 INFO L226 Difference]: Without dead ends: 383 [2021-05-06 02:25:54,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 3483.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:25:54,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-06 02:25:54,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 374. [2021-05-06 02:25:54,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 234 states have (on average 1.1837606837606838) internal successors, (277), 243 states have internal predecessors, (277), 97 states have call successors, (97), 43 states have call predecessors, (97), 42 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-06 02:25:54,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 467 transitions. [2021-05-06 02:25:54,701 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 467 transitions. Word has length 90 [2021-05-06 02:25:54,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:25:54,701 INFO L480 AbstractCegarLoop]: Abstraction has 374 states and 467 transitions. [2021-05-06 02:25:54,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:25:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 467 transitions. [2021-05-06 02:25:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 02:25:54,702 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:25:54,702 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 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 02:25:54,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 02:25:54,919 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:25:54,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:25:54,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 4 times [2021-05-06 02:25:54,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:25:54,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498495703] [2021-05-06 02:25:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:25:54,925 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:25:54,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371450142] [2021-05-06 02:25:54,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:25:54,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:25:54,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:25:54,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:25:54,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:25:54,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:54,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:54,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:25:55,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:25:55,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498495703] [2021-05-06 02:25:55,142 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:25:55,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371450142] [2021-05-06 02:25:55,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371450142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:25:55,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:25:55,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:25:55,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792119268] [2021-05-06 02:25:55,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:25:55,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:25:55,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:25:55,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:25:55,143 INFO L87 Difference]: Start difference. First operand 374 states and 467 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:25:55,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:25:55,247 INFO L93 Difference]: Finished difference Result 490 states and 592 transitions. [2021-05-06 02:25:55,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:25:55,247 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 99 [2021-05-06 02:25:55,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:25:55,249 INFO L225 Difference]: With dead ends: 490 [2021-05-06 02:25:55,249 INFO L226 Difference]: Without dead ends: 460 [2021-05-06 02:25:55,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:25:55,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-06 02:25:55,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 432. [2021-05-06 02:25:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 280 states have (on average 1.1392857142857142) internal successors, (319), 290 states have internal predecessors, (319), 97 states have call successors, (97), 55 states have call predecessors, (97), 54 states have return successors, (93), 86 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-06 02:25:55,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 509 transitions. [2021-05-06 02:25:55,274 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 509 transitions. Word has length 99 [2021-05-06 02:25:55,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:25:55,274 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 509 transitions. [2021-05-06 02:25:55,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:25:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 509 transitions. [2021-05-06 02:25:55,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:25:55,275 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:25:55,275 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:25:55,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 02:25:55,489 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:25:55,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:25:55,489 INFO L82 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 4 times [2021-05-06 02:25:55,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:25:55,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109453853] [2021-05-06 02:25:55,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:25:55,494 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:25:55,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712114185] [2021-05-06 02:25:55,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:25:55,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:25:55,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:25:55,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 02:25:55,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:25:55,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 70 proven. 122 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-05-06 02:25:55,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:25:55,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109453853] [2021-05-06 02:25:55,904 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:25:55,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712114185] [2021-05-06 02:25:55,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712114185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:25:55,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:25:55,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:25:55,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086918430] [2021-05-06 02:25:55,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:25:55,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:25:55,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:25:55,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:25:55,906 INFO L87 Difference]: Start difference. First operand 432 states and 509 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-06 02:25:56,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:25:56,460 INFO L93 Difference]: Finished difference Result 469 states and 567 transitions. [2021-05-06 02:25:56,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:25:56,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 104 [2021-05-06 02:25:56,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:25:56,463 INFO L225 Difference]: With dead ends: 469 [2021-05-06 02:25:56,463 INFO L226 Difference]: Without dead ends: 467 [2021-05-06 02:25:56,463 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:25:56,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-06 02:25:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 443. [2021-05-06 02:25:56,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 287 states have (on average 1.1428571428571428) internal successors, (328), 297 states have internal predecessors, (328), 100 states have call successors, (100), 56 states have call predecessors, (100), 55 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2021-05-06 02:25:56,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 524 transitions. [2021-05-06 02:25:56,488 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 524 transitions. Word has length 104 [2021-05-06 02:25:56,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:25:56,489 INFO L480 AbstractCegarLoop]: Abstraction has 443 states and 524 transitions. [2021-05-06 02:25:56,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-06 02:25:56,489 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 524 transitions. [2021-05-06 02:25:56,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:25:56,490 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:25:56,490 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:25:56,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:25:56,707 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:25:56,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:25:56,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 13 times [2021-05-06 02:25:56,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:25:56,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731292453] [2021-05-06 02:25:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:25:56,717 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:25:56,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120776480] [2021-05-06 02:25:56,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 02:25:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:25:56,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 02:25:56,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:25:56,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:56,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:56,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:56,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:56,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:56,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:56,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:56,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:56,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:56,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:57,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:57,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:57,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:57,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:57,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:57,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:57,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-05-06 02:25:57,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:25:57,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731292453] [2021-05-06 02:25:57,072 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:25:57,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120776480] [2021-05-06 02:25:57,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120776480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:25:57,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:25:57,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:25:57,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18177377] [2021-05-06 02:25:57,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:25:57,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:25:57,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:25:57,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:25:57,074 INFO L87 Difference]: Start difference. First operand 443 states and 524 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:25:57,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:25:57,447 INFO L93 Difference]: Finished difference Result 472 states and 565 transitions. [2021-05-06 02:25:57,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:25:57,447 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 02:25:57,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:25:57,449 INFO L225 Difference]: With dead ends: 472 [2021-05-06 02:25:57,449 INFO L226 Difference]: Without dead ends: 470 [2021-05-06 02:25:57,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:25:57,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-06 02:25:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 454. [2021-05-06 02:25:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 294 states have (on average 1.1428571428571428) internal successors, (336), 304 states have internal predecessors, (336), 103 states have call successors, (103), 57 states have call predecessors, (103), 56 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-06 02:25:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 538 transitions. [2021-05-06 02:25:57,475 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 538 transitions. Word has length 104 [2021-05-06 02:25:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:25:57,476 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 538 transitions. [2021-05-06 02:25:57,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:25:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 538 transitions. [2021-05-06 02:25:57,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:25:57,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:25:57,477 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:25:57,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 02:25:57,681 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:25:57,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:25:57,681 INFO L82 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 14 times [2021-05-06 02:25:57,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:25:57,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971705482] [2021-05-06 02:25:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:25:57,685 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:25:57,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568077480] [2021-05-06 02:25:57,685 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 02:25:57,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:25:57,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:25:57,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 02:25:57,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:25:57,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:57,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:57,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:57,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:57,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:57,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 84 proven. 66 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-05-06 02:25:58,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:25:58,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971705482] [2021-05-06 02:25:58,009 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:25:58,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568077480] [2021-05-06 02:25:58,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568077480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:25:58,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:25:58,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:25:58,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034430796] [2021-05-06 02:25:58,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:25:58,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:25:58,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:25:58,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:25:58,010 INFO L87 Difference]: Start difference. First operand 454 states and 538 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:25:58,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:25:58,643 INFO L93 Difference]: Finished difference Result 497 states and 591 transitions. [2021-05-06 02:25:58,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:25:58,643 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 02:25:58,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:25:58,646 INFO L225 Difference]: With dead ends: 497 [2021-05-06 02:25:58,646 INFO L226 Difference]: Without dead ends: 495 [2021-05-06 02:25:58,647 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:25:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-05-06 02:25:58,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 460. [2021-05-06 02:25:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 300 states have (on average 1.1433333333333333) internal successors, (343), 308 states have internal predecessors, (343), 101 states have call successors, (101), 59 states have call predecessors, (101), 58 states have return successors, (97), 92 states have call predecessors, (97), 97 states have call successors, (97) [2021-05-06 02:25:58,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 541 transitions. [2021-05-06 02:25:58,676 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 541 transitions. Word has length 104 [2021-05-06 02:25:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:25:58,676 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 541 transitions. [2021-05-06 02:25:58,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:25:58,677 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 541 transitions. [2021-05-06 02:25:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:25:58,677 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:25:58,677 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:25:58,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:25:58,890 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:25:58,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:25:58,890 INFO L82 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 15 times [2021-05-06 02:25:58,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:25:58,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374139015] [2021-05-06 02:25:58,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:25:58,894 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:25:58,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831934247] [2021-05-06 02:25:58,895 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 02:25:59,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:25:59,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:25:59,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 02:25:59,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:25:59,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:25:59,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,136 WARN L205 SmtUtils]: Spent 8.41 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-06 02:26:17,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:26:17,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:40,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:40,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:41,387 WARN L159 QuantifierPusher]: Ignoring assumption.