/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/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 02:44:07,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 02:44:07,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 02:44:08,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 02:44:08,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 02:44:08,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 02:44:08,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 02:44:08,054 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 02:44:08,061 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 02:44:08,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 02:44:08,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 02:44:08,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 02:44:08,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 02:44:08,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 02:44:08,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 02:44:08,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 02:44:08,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 02:44:08,063 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 02:44:08,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 02:44:08,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 02:44:08,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 02:44:08,063 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 02:44:08,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 02:44:08,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:44:08,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 02:44:08,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 02:44:08,064 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 02:44:08,064 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 02:44:08,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 02:44:08,064 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 02:44:08,064 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 02:44:08,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 02:44:08,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 02:44:08,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 02:44:08,308 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 02:44:08,310 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 02:44:08,313 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2022-03-18 02:44:08,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ece8b7eae/4278a88af76f435dbf7d82e6ad57e45c/FLAGf4cb3132d [2022-03-18 02:44:08,756 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 02:44:08,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_unwindbound100.c [2022-03-18 02:44:08,761 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ece8b7eae/4278a88af76f435dbf7d82e6ad57e45c/FLAGf4cb3132d [2022-03-18 02:44:08,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ece8b7eae/4278a88af76f435dbf7d82e6ad57e45c [2022-03-18 02:44:08,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 02:44:08,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 02:44:08,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 02:44:08,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 02:44:08,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 02:44:08,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:44:08" (1/1) ... [2022-03-18 02:44:08,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5991a909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:44:08, skipping insertion in model container [2022-03-18 02:44:08,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:44:08" (1/1) ... [2022-03-18 02:44:08,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 02:44:08,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 02:44:09,007 WARN L230 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/egcd3-ll_unwindbound100.c[490,503] [2022-03-18 02:44:09,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:44:09,063 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 02:44:09,072 WARN L230 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/egcd3-ll_unwindbound100.c[490,503] [2022-03-18 02:44:09,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 02:44:09,094 INFO L208 MainTranslator]: Completed translation [2022-03-18 02:44:09,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:44:09 WrapperNode [2022-03-18 02:44:09,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 02:44:09,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 02:44:09,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 02:44:09,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 02:44:09,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:44:09" (1/1) ... [2022-03-18 02:44:09,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:44:09" (1/1) ... [2022-03-18 02:44:09,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:44:09" (1/1) ... [2022-03-18 02:44:09,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:44:09" (1/1) ... [2022-03-18 02:44:09,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:44:09" (1/1) ... [2022-03-18 02:44:09,115 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:44:09" (1/1) ... [2022-03-18 02:44:09,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:44:09" (1/1) ... [2022-03-18 02:44:09,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 02:44:09,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 02:44:09,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 02:44:09,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 02:44:09,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:44:09" (1/1) ... [2022-03-18 02:44:09,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 02:44:09,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:09,150 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 02:44:09,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 02:44:09,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 02:44:09,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 02:44:09,194 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 02:44:09,194 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 02:44:09,195 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 02:44:09,195 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 02:44:09,195 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 02:44:09,195 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 02:44:09,195 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 02:44:09,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 02:44:09,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 02:44:09,197 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 02:44:09,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 02:44:09,197 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 02:44:09,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 02:44:09,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 02:44:09,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 02:44:09,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 02:44:09,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 02:44:09,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 02:44:09,279 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 02:44:09,281 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 02:44:09,435 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 02:44:09,441 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 02:44:09,441 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-18 02:44:09,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:44:09 BoogieIcfgContainer [2022-03-18 02:44:09,443 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 02:44:09,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 02:44:09,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 02:44:09,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 02:44:09,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 02:44:08" (1/3) ... [2022-03-18 02:44:09,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d751ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:44:09, skipping insertion in model container [2022-03-18 02:44:09,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:44:09" (2/3) ... [2022-03-18 02:44:09,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d751ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:44:09, skipping insertion in model container [2022-03-18 02:44:09,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:44:09" (3/3) ... [2022-03-18 02:44:09,450 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound100.c [2022-03-18 02:44:09,454 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 02:44:09,454 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 02:44:09,486 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 02:44:09,492 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 02:44:09,492 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 02:44:09,504 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 02:44:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 02:44:09,510 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:09,511 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:09,511 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:09,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:09,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 1 times [2022-03-18 02:44:09,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:09,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [302665863] [2022-03-18 02:44:09,536 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:09,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1766263304, now seen corresponding path program 2 times [2022-03-18 02:44:09,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:09,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29014198] [2022-03-18 02:44:09,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:09,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:44:09,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 02:44:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:44:09,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 02:44:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:44:09,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 02:44:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 02:44:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:44:09,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:09,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29014198] [2022-03-18 02:44:09,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29014198] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:09,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:09,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:44:09,706 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:09,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [302665863] [2022-03-18 02:44:09,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [302665863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:09,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:09,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 02:44:09,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119107251] [2022-03-18 02:44:09,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:09,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 02:44:09,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:09,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 02:44:09,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:44:09,733 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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) [2022-03-18 02:44:09,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:09,831 INFO L93 Difference]: Finished difference Result 74 states and 111 transitions. [2022-03-18 02:44:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 02:44:09,833 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 [2022-03-18 02:44:09,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:09,840 INFO L225 Difference]: With dead ends: 74 [2022-03-18 02:44:09,841 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 02:44:09,844 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 02:44:09,848 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:09,849 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 51 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:09,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 02:44:09,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-18 02:44:09,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 02:44:09,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2022-03-18 02:44:09,890 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 22 [2022-03-18 02:44:09,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:09,891 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2022-03-18 02:44:09,891 INFO L479 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) [2022-03-18 02:44:09,891 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2022-03-18 02:44:09,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 02:44:09,892 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:09,892 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:09,893 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 02:44:09,893 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:09,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:09,894 INFO L85 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 1 times [2022-03-18 02:44:09,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:09,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1770357017] [2022-03-18 02:44:09,895 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:09,895 INFO L85 PathProgramCache]: Analyzing trace with hash -81203399, now seen corresponding path program 2 times [2022-03-18 02:44:09,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:09,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405546593] [2022-03-18 02:44:09,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:09,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:09,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:09,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361546503] [2022-03-18 02:44:09,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:09,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:09,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:09,924 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:09,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 02:44:10,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 02:44:10,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:10,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 02:44:10,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:44:10,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:44:10,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:10,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405546593] [2022-03-18 02:44:10,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:10,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361546503] [2022-03-18 02:44:10,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361546503] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:10,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:10,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 02:44:10,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:10,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1770357017] [2022-03-18 02:44:10,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1770357017] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:10,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:10,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 02:44:10,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207408833] [2022-03-18 02:44:10,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:10,143 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 02:44:10,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:10,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 02:44:10,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 02:44:10,144 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:44:10,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:10,160 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2022-03-18 02:44:10,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 02:44:10,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-18 02:44:10,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:10,162 INFO L225 Difference]: With dead ends: 44 [2022-03-18 02:44:10,162 INFO L226 Difference]: Without dead ends: 37 [2022-03-18 02:44:10,163 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 02:44:10,164 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:10,165 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 113 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:44:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-18 02:44:10,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-18 02:44:10,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 02:44:10,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-03-18 02:44:10,177 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 23 [2022-03-18 02:44:10,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:10,178 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-03-18 02:44:10,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:44:10,178 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-03-18 02:44:10,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 02:44:10,179 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:10,179 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:10,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 02:44:10,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:10,384 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:10,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:10,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 1 times [2022-03-18 02:44:10,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:10,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [388369941] [2022-03-18 02:44:10,386 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:10,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1762644405, now seen corresponding path program 2 times [2022-03-18 02:44:10,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:10,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276471683] [2022-03-18 02:44:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:10,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:10,407 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:10,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455805455] [2022-03-18 02:44:10,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:10,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:10,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:10,409 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:10,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 02:44:10,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 02:44:10,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:10,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 02:44:10,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:44:10,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:44:10,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:10,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276471683] [2022-03-18 02:44:10,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:10,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455805455] [2022-03-18 02:44:10,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455805455] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:10,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:10,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:44:10,704 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:10,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [388369941] [2022-03-18 02:44:10,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [388369941] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:10,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:10,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:44:10,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794100467] [2022-03-18 02:44:10,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:10,706 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 02:44:10,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:10,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 02:44:10,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:44:10,707 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-03-18 02:44:10,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:10,807 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2022-03-18 02:44:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:44:10,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 24 [2022-03-18 02:44:10,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:10,811 INFO L225 Difference]: With dead ends: 57 [2022-03-18 02:44:10,811 INFO L226 Difference]: Without dead ends: 54 [2022-03-18 02:44:10,812 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:44:10,813 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 18 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:10,814 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 192 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:44:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-18 02:44:10,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-03-18 02:44:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 36 states have internal predecessors, (46), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 02:44:10,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2022-03-18 02:44:10,825 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 24 [2022-03-18 02:44:10,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:10,826 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2022-03-18 02:44:10,826 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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) [2022-03-18 02:44:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2022-03-18 02:44:10,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 02:44:10,827 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:10,827 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:10,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:11,050 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 02:44:11,051 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:11,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 1 times [2022-03-18 02:44:11,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:11,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1311314383] [2022-03-18 02:44:11,052 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:11,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1090347867, now seen corresponding path program 2 times [2022-03-18 02:44:11,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:11,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286303450] [2022-03-18 02:44:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:11,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:11,068 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:11,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501661666] [2022-03-18 02:44:11,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:11,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:11,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:11,070 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:11,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 02:44:11,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:11,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:11,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 02:44:11,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:44:11,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:44:11,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:11,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286303450] [2022-03-18 02:44:11,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:11,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501661666] [2022-03-18 02:44:11,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501661666] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:11,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:11,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:44:11,223 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:11,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1311314383] [2022-03-18 02:44:11,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1311314383] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:11,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:11,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:44:11,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358078143] [2022-03-18 02:44:11,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:11,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:44:11,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:11,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:44:11,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:44:11,227 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:44:11,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:11,262 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2022-03-18 02:44:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:44:11,262 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-03-18 02:44:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:11,265 INFO L225 Difference]: With dead ends: 77 [2022-03-18 02:44:11,265 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 02:44:11,267 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:44:11,270 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:11,271 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 113 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:44:11,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 02:44:11,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-18 02:44:11,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 02:44:11,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2022-03-18 02:44:11,285 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 29 [2022-03-18 02:44:11,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:11,285 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2022-03-18 02:44:11,285 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:44:11,285 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2022-03-18 02:44:11,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 02:44:11,286 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:11,286 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:11,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:11,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:11,495 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:11,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:11,496 INFO L85 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 1 times [2022-03-18 02:44:11,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:11,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1463429095] [2022-03-18 02:44:11,496 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:11,497 INFO L85 PathProgramCache]: Analyzing trace with hash 979890972, now seen corresponding path program 2 times [2022-03-18 02:44:11,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:11,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705930097] [2022-03-18 02:44:11,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:11,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:11,513 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:11,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550523385] [2022-03-18 02:44:11,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:11,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:11,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:11,515 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:11,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 02:44:11,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:11,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:11,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:44:11,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:44:11,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:44:11,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:11,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705930097] [2022-03-18 02:44:11,750 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:11,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550523385] [2022-03-18 02:44:11,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550523385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:11,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:11,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-18 02:44:11,750 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:11,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1463429095] [2022-03-18 02:44:11,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1463429095] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:11,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:11,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:44:11,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404803909] [2022-03-18 02:44:11,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:11,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 02:44:11,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:11,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 02:44:11,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-18 02:44:11,752 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:44:11,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:11,791 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2022-03-18 02:44:11,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 02:44:11,791 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-03-18 02:44:11,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:11,792 INFO L225 Difference]: With dead ends: 67 [2022-03-18 02:44:11,792 INFO L226 Difference]: Without dead ends: 60 [2022-03-18 02:44:11,792 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-18 02:44:11,793 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:11,793 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 141 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:44:11,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-18 02:44:11,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-18 02:44:11,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 42 states have internal predecessors, (53), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 02:44:11,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 77 transitions. [2022-03-18 02:44:11,802 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 77 transitions. Word has length 30 [2022-03-18 02:44:11,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:11,803 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 77 transitions. [2022-03-18 02:44:11,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:44:11,803 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 77 transitions. [2022-03-18 02:44:11,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-18 02:44:11,804 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:11,804 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:11,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:12,026 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:12,027 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:12,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:12,027 INFO L85 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 1 times [2022-03-18 02:44:12,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:12,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2006556739] [2022-03-18 02:44:12,028 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:12,028 INFO L85 PathProgramCache]: Analyzing trace with hash 296831538, now seen corresponding path program 2 times [2022-03-18 02:44:12,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:12,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411345049] [2022-03-18 02:44:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:12,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:12,044 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:12,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243816050] [2022-03-18 02:44:12,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:12,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:12,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:12,048 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:12,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 02:44:12,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:12,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:12,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:44:12,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:12,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 02:44:12,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 02:44:12,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:12,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411345049] [2022-03-18 02:44:12,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:12,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243816050] [2022-03-18 02:44:12,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243816050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:12,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:12,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 02:44:12,309 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:12,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2006556739] [2022-03-18 02:44:12,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2006556739] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:12,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:12,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:44:12,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247990157] [2022-03-18 02:44:12,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:12,310 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:44:12,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:12,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:44:12,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:44:12,311 INFO L87 Difference]: Start difference. First operand 59 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:44:12,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:12,484 INFO L93 Difference]: Finished difference Result 138 states and 201 transitions. [2022-03-18 02:44:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:44:12,485 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), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-03-18 02:44:12,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:12,486 INFO L225 Difference]: With dead ends: 138 [2022-03-18 02:44:12,486 INFO L226 Difference]: Without dead ends: 131 [2022-03-18 02:44:12,487 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:44:12,487 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 115 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:12,488 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 353 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:12,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-18 02:44:12,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2022-03-18 02:44:12,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 67 states have internal predecessors, (90), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 02:44:12,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 122 transitions. [2022-03-18 02:44:12,508 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 122 transitions. Word has length 31 [2022-03-18 02:44:12,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:12,509 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 122 transitions. [2022-03-18 02:44:12,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:44:12,509 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 122 transitions. [2022-03-18 02:44:12,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-18 02:44:12,515 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:12,515 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:12,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-18 02:44:12,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:12,727 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:12,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:12,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 1 times [2022-03-18 02:44:12,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:12,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1731732313] [2022-03-18 02:44:12,728 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:12,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1911367052, now seen corresponding path program 2 times [2022-03-18 02:44:12,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:12,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379707632] [2022-03-18 02:44:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:12,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:12,742 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:12,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425846679] [2022-03-18 02:44:12,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:12,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:12,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:12,744 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:12,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 02:44:12,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:12,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:12,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 02:44:12,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:44:12,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:44:12,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:12,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379707632] [2022-03-18 02:44:12,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:12,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425846679] [2022-03-18 02:44:12,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425846679] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:12,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:12,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:44:12,874 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:12,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1731732313] [2022-03-18 02:44:12,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1731732313] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:12,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:12,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 02:44:12,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576878681] [2022-03-18 02:44:12,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:12,874 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 02:44:12,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:12,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 02:44:12,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:44:12,875 INFO L87 Difference]: Start difference. First operand 88 states and 122 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:44:12,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:12,903 INFO L93 Difference]: Finished difference Result 127 states and 178 transitions. [2022-03-18 02:44:12,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:44:12,904 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-03-18 02:44:12,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:12,905 INFO L225 Difference]: With dead ends: 127 [2022-03-18 02:44:12,905 INFO L226 Difference]: Without dead ends: 90 [2022-03-18 02:44:12,905 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:44:12,906 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 10 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:12,906 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 165 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:44:12,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-18 02:44:12,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-03-18 02:44:12,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 69 states have internal predecessors, (92), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 02:44:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 124 transitions. [2022-03-18 02:44:12,921 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 124 transitions. Word has length 35 [2022-03-18 02:44:12,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:12,922 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 124 transitions. [2022-03-18 02:44:12,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:44:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 124 transitions. [2022-03-18 02:44:12,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 02:44:12,923 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:12,923 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:12,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:13,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:13,140 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:13,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:13,140 INFO L85 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 1 times [2022-03-18 02:44:13,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:13,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [105702124] [2022-03-18 02:44:13,141 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:13,141 INFO L85 PathProgramCache]: Analyzing trace with hash -304485816, now seen corresponding path program 2 times [2022-03-18 02:44:13,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:13,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129204922] [2022-03-18 02:44:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:13,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:13,153 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:13,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332895601] [2022-03-18 02:44:13,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:13,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:13,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:13,157 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:13,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 02:44:13,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:13,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:13,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 02:44:13,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:44:13,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:44:13,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:13,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129204922] [2022-03-18 02:44:13,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:13,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332895601] [2022-03-18 02:44:13,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332895601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:13,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:13,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-18 02:44:13,398 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:13,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [105702124] [2022-03-18 02:44:13,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [105702124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:13,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:13,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 02:44:13,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515685448] [2022-03-18 02:44:13,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:13,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 02:44:13,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:13,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 02:44:13,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:44:13,416 INFO L87 Difference]: Start difference. First operand 90 states and 124 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:44:13,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:13,468 INFO L93 Difference]: Finished difference Result 163 states and 227 transitions. [2022-03-18 02:44:13,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:44:13,469 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), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-03-18 02:44:13,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:13,470 INFO L225 Difference]: With dead ends: 163 [2022-03-18 02:44:13,470 INFO L226 Difference]: Without dead ends: 112 [2022-03-18 02:44:13,470 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-03-18 02:44:13,471 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 29 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:13,471 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 163 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:44:13,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-18 02:44:13,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-03-18 02:44:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-18 02:44:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 147 transitions. [2022-03-18 02:44:13,487 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 147 transitions. Word has length 36 [2022-03-18 02:44:13,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:13,487 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 147 transitions. [2022-03-18 02:44:13,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:44:13,487 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 147 transitions. [2022-03-18 02:44:13,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-18 02:44:13,488 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:13,488 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:13,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:13,710 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:13,710 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:13,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:13,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 1 times [2022-03-18 02:44:13,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:13,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1995307527] [2022-03-18 02:44:13,712 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:13,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1581560821, now seen corresponding path program 2 times [2022-03-18 02:44:13,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:13,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370626541] [2022-03-18 02:44:13,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:13,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:13,722 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:13,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511917913] [2022-03-18 02:44:13,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:13,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:13,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:13,724 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:13,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 02:44:13,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:13,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:13,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 02:44:13,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 02:44:13,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:44:14,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:14,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370626541] [2022-03-18 02:44:14,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:14,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511917913] [2022-03-18 02:44:14,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511917913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:14,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:14,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-18 02:44:14,080 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:14,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1995307527] [2022-03-18 02:44:14,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1995307527] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:14,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:14,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:44:14,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246859579] [2022-03-18 02:44:14,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:14,082 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:44:14,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:14,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:44:14,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 02:44:14,083 INFO L87 Difference]: Start difference. First operand 109 states and 147 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:44:14,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:14,195 INFO L93 Difference]: Finished difference Result 154 states and 208 transitions. [2022-03-18 02:44:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:44:14,196 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-03-18 02:44:14,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:14,197 INFO L225 Difference]: With dead ends: 154 [2022-03-18 02:44:14,197 INFO L226 Difference]: Without dead ends: 152 [2022-03-18 02:44:14,198 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-03-18 02:44:14,198 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 61 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:14,198 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 375 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:14,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-18 02:44:14,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2022-03-18 02:44:14,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 110 states have internal predecessors, (146), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-18 02:44:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 202 transitions. [2022-03-18 02:44:14,218 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 202 transitions. Word has length 36 [2022-03-18 02:44:14,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:14,219 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 202 transitions. [2022-03-18 02:44:14,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:44:14,219 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 202 transitions. [2022-03-18 02:44:14,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 02:44:14,219 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:14,219 INFO L500 BasicCegarLoop]: trace histogram [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, 1] [2022-03-18 02:44:14,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-18 02:44:14,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 02:44:14,439 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:14,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:14,439 INFO L85 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 3 times [2022-03-18 02:44:14,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:14,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1226418608] [2022-03-18 02:44:14,440 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:14,440 INFO L85 PathProgramCache]: Analyzing trace with hash -428189223, now seen corresponding path program 4 times [2022-03-18 02:44:14,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:14,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317330233] [2022-03-18 02:44:14,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:14,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:14,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:14,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393204467] [2022-03-18 02:44:14,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:44:14,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:14,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:14,454 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:14,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 02:44:14,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:44:14,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:14,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 02:44:14,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:44:14,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:44:14,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:14,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317330233] [2022-03-18 02:44:14,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:14,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393204467] [2022-03-18 02:44:14,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393204467] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:14,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:14,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:44:14,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:14,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1226418608] [2022-03-18 02:44:14,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1226418608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:14,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:14,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:44:14,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428183614] [2022-03-18 02:44:14,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:14,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:44:14,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:14,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:44:14,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:44:14,564 INFO L87 Difference]: Start difference. First operand 148 states and 202 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-03-18 02:44:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:14,656 INFO L93 Difference]: Finished difference Result 300 states and 442 transitions. [2022-03-18 02:44:14,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:44:14,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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 37 [2022-03-18 02:44:14,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:14,660 INFO L225 Difference]: With dead ends: 300 [2022-03-18 02:44:14,660 INFO L226 Difference]: Without dead ends: 249 [2022-03-18 02:44:14,662 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-18 02:44:14,662 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 29 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:14,663 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 202 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:44:14,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-18 02:44:14,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 175. [2022-03-18 02:44:14,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 137 states have internal predecessors, (183), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-18 02:44:14,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 239 transitions. [2022-03-18 02:44:14,694 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 239 transitions. Word has length 37 [2022-03-18 02:44:14,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:14,695 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 239 transitions. [2022-03-18 02:44:14,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2022-03-18 02:44:14,695 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 239 transitions. [2022-03-18 02:44:14,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-18 02:44:14,695 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:14,695 INFO L500 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, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:14,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:14,913 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 02:44:14,913 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:14,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:14,913 INFO L85 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 1 times [2022-03-18 02:44:14,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:14,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [380366261] [2022-03-18 02:44:14,914 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:14,914 INFO L85 PathProgramCache]: Analyzing trace with hash -957710478, now seen corresponding path program 2 times [2022-03-18 02:44:14,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:14,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393876977] [2022-03-18 02:44:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:14,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:14,928 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:14,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958684133] [2022-03-18 02:44:14,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:14,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:14,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:14,929 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:14,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 02:44:14,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:14,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:14,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 02:44:14,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 02:44:15,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:44:15,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:15,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393876977] [2022-03-18 02:44:15,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:15,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958684133] [2022-03-18 02:44:15,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958684133] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:15,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:15,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:44:15,101 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:15,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [380366261] [2022-03-18 02:44:15,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [380366261] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:15,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:15,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:44:15,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780659455] [2022-03-18 02:44:15,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:15,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:44:15,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:15,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:44:15,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:44:15,103 INFO L87 Difference]: Start difference. First operand 175 states and 239 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 02:44:15,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:15,224 INFO L93 Difference]: Finished difference Result 193 states and 262 transitions. [2022-03-18 02:44:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 02:44:15,224 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-18 02:44:15,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:15,226 INFO L225 Difference]: With dead ends: 193 [2022-03-18 02:44:15,226 INFO L226 Difference]: Without dead ends: 191 [2022-03-18 02:44:15,227 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-18 02:44:15,227 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 61 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:15,227 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 270 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:15,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-18 02:44:15,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-03-18 02:44:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 145 states have (on average 1.3379310344827586) internal successors, (194), 146 states have internal predecessors, (194), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-18 02:44:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 258 transitions. [2022-03-18 02:44:15,251 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 258 transitions. Word has length 39 [2022-03-18 02:44:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:15,252 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 258 transitions. [2022-03-18 02:44:15,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 02:44:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 258 transitions. [2022-03-18 02:44:15,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 02:44:15,252 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:15,252 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:15,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:15,474 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 02:44:15,475 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:15,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:15,475 INFO L85 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 1 times [2022-03-18 02:44:15,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:15,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [717631807] [2022-03-18 02:44:15,476 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:15,476 INFO L85 PathProgramCache]: Analyzing trace with hash 409018142, now seen corresponding path program 2 times [2022-03-18 02:44:15,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:15,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337701957] [2022-03-18 02:44:15,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:15,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:15,485 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:15,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261525329] [2022-03-18 02:44:15,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:15,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:15,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:15,491 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:15,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 02:44:15,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:15,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:15,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 02:44:15,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:44:15,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:44:16,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:16,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337701957] [2022-03-18 02:44:16,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:16,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261525329] [2022-03-18 02:44:16,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261525329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:16,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:16,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2022-03-18 02:44:16,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:16,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [717631807] [2022-03-18 02:44:16,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [717631807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:16,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:16,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:44:16,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879217720] [2022-03-18 02:44:16,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:16,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:44:16,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:16,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:44:16,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:44:16,067 INFO L87 Difference]: Start difference. First operand 190 states and 258 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 02:44:16,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:16,237 INFO L93 Difference]: Finished difference Result 199 states and 266 transitions. [2022-03-18 02:44:16,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 02:44:16,238 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 41 [2022-03-18 02:44:16,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:16,239 INFO L225 Difference]: With dead ends: 199 [2022-03-18 02:44:16,239 INFO L226 Difference]: Without dead ends: 197 [2022-03-18 02:44:16,239 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:44:16,240 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 72 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:16,240 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 385 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:16,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-18 02:44:16,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2022-03-18 02:44:16,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 148 states have (on average 1.3310810810810811) internal successors, (197), 149 states have internal predecessors, (197), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-18 02:44:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 261 transitions. [2022-03-18 02:44:16,260 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 261 transitions. Word has length 41 [2022-03-18 02:44:16,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:16,261 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 261 transitions. [2022-03-18 02:44:16,261 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 02:44:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 261 transitions. [2022-03-18 02:44:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 02:44:16,261 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:16,262 INFO L500 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, 1, 1, 1, 1, 1] [2022-03-18 02:44:16,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:16,484 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 02:44:16,484 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:16,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:16,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 1 times [2022-03-18 02:44:16,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:16,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1794092099] [2022-03-18 02:44:16,485 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:16,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1943393983, now seen corresponding path program 2 times [2022-03-18 02:44:16,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:16,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747482636] [2022-03-18 02:44:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:16,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:16,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:16,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130075661] [2022-03-18 02:44:16,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:16,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:16,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:16,501 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:16,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 02:44:16,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:16,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:16,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 02:44:16,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 02:44:16,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:44:16,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:16,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747482636] [2022-03-18 02:44:16,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:16,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130075661] [2022-03-18 02:44:16,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130075661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:16,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:16,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:44:16,622 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:16,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1794092099] [2022-03-18 02:44:16,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1794092099] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:16,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:16,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:44:16,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125408198] [2022-03-18 02:44:16,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:16,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:44:16,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:16,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:44:16,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:44:16,623 INFO L87 Difference]: Start difference. First operand 194 states and 261 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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) [2022-03-18 02:44:16,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:16,677 INFO L93 Difference]: Finished difference Result 261 states and 367 transitions. [2022-03-18 02:44:16,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:44:16,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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 44 [2022-03-18 02:44:16,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:16,681 INFO L225 Difference]: With dead ends: 261 [2022-03-18 02:44:16,681 INFO L226 Difference]: Without dead ends: 259 [2022-03-18 02:44:16,681 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:44:16,682 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 12 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:16,682 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 169 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:44:16,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-18 02:44:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 228. [2022-03-18 02:44:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 161 states have (on average 1.329192546583851) internal successors, (214), 167 states have internal predecessors, (214), 53 states have call successors, (53), 14 states have call predecessors, (53), 13 states have return successors, (51), 46 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-18 02:44:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 318 transitions. [2022-03-18 02:44:16,710 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 318 transitions. Word has length 44 [2022-03-18 02:44:16,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:16,711 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 318 transitions. [2022-03-18 02:44:16,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 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) [2022-03-18 02:44:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 318 transitions. [2022-03-18 02:44:16,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 02:44:16,711 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:16,711 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:16,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:16,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 02:44:16,931 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:16,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:16,932 INFO L85 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 1 times [2022-03-18 02:44:16,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:16,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [534844208] [2022-03-18 02:44:16,932 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:16,932 INFO L85 PathProgramCache]: Analyzing trace with hash -772903697, now seen corresponding path program 2 times [2022-03-18 02:44:16,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:16,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609879639] [2022-03-18 02:44:16,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:16,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:16,941 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:16,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1122269390] [2022-03-18 02:44:16,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:16,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:16,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:16,942 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:16,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 02:44:16,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:16,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:16,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 02:44:16,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:44:17,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 02:44:17,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:17,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609879639] [2022-03-18 02:44:17,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:17,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122269390] [2022-03-18 02:44:17,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122269390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:17,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:17,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-18 02:44:17,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:17,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [534844208] [2022-03-18 02:44:17,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [534844208] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:17,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:17,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:44:17,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36024166] [2022-03-18 02:44:17,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:17,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:44:17,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:17,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:44:17,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:44:17,243 INFO L87 Difference]: Start difference. First operand 228 states and 318 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:44:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:17,351 INFO L93 Difference]: Finished difference Result 429 states and 607 transitions. [2022-03-18 02:44:17,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:44:17,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-03-18 02:44:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:17,354 INFO L225 Difference]: With dead ends: 429 [2022-03-18 02:44:17,354 INFO L226 Difference]: Without dead ends: 264 [2022-03-18 02:44:17,355 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:44:17,355 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 59 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:17,355 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 203 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:17,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-18 02:44:17,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 258. [2022-03-18 02:44:17,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 183 states have (on average 1.3060109289617485) internal successors, (239), 189 states have internal predecessors, (239), 57 states have call successors, (57), 18 states have call predecessors, (57), 17 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-18 02:44:17,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 351 transitions. [2022-03-18 02:44:17,383 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 351 transitions. Word has length 42 [2022-03-18 02:44:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:17,383 INFO L478 AbstractCegarLoop]: Abstraction has 258 states and 351 transitions. [2022-03-18 02:44:17,383 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 02:44:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 351 transitions. [2022-03-18 02:44:17,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 02:44:17,384 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:17,384 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:17,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:17,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 02:44:17,607 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:17,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:17,607 INFO L85 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 1 times [2022-03-18 02:44:17,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:17,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2114582410] [2022-03-18 02:44:17,608 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:17,608 INFO L85 PathProgramCache]: Analyzing trace with hash 744709461, now seen corresponding path program 2 times [2022-03-18 02:44:17,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:17,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299594196] [2022-03-18 02:44:17,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:17,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:17,616 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:17,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051816715] [2022-03-18 02:44:17,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:17,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:17,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:17,618 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:17,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 02:44:17,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:17,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:17,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 02:44:17,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-03-18 02:44:17,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:44:17,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:17,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299594196] [2022-03-18 02:44:17,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:17,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051816715] [2022-03-18 02:44:17,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051816715] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:17,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:17,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:44:17,764 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:17,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2114582410] [2022-03-18 02:44:17,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2114582410] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:17,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:17,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:44:17,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510459783] [2022-03-18 02:44:17,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:17,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:44:17,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:17,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:44:17,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:44:17,767 INFO L87 Difference]: Start difference. First operand 258 states and 351 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-03-18 02:44:17,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:17,827 INFO L93 Difference]: Finished difference Result 332 states and 473 transitions. [2022-03-18 02:44:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:44:17,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 46 [2022-03-18 02:44:17,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:17,829 INFO L225 Difference]: With dead ends: 332 [2022-03-18 02:44:17,829 INFO L226 Difference]: Without dead ends: 330 [2022-03-18 02:44:17,831 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:44:17,832 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 10 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:17,832 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 158 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:44:17,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-03-18 02:44:17,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 321. [2022-03-18 02:44:17,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 213 states have (on average 1.3427230046948357) internal successors, (286), 223 states have internal predecessors, (286), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-18 02:44:17,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 462 transitions. [2022-03-18 02:44:17,870 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 462 transitions. Word has length 46 [2022-03-18 02:44:17,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:17,870 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 462 transitions. [2022-03-18 02:44:17,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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) [2022-03-18 02:44:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 462 transitions. [2022-03-18 02:44:17,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-18 02:44:17,871 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:17,871 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:17,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:18,093 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:18,094 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:18,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:18,094 INFO L85 PathProgramCache]: Analyzing trace with hash -522797827, now seen corresponding path program 1 times [2022-03-18 02:44:18,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:18,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [891269981] [2022-03-18 02:44:18,095 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:18,095 INFO L85 PathProgramCache]: Analyzing trace with hash -522797827, now seen corresponding path program 2 times [2022-03-18 02:44:18,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:18,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312626045] [2022-03-18 02:44:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:18,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:18,103 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:18,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403148758] [2022-03-18 02:44:18,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:18,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:18,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:18,105 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:18,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 02:44:18,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:18,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:18,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 02:44:18,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:44:18,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:44:18,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:18,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312626045] [2022-03-18 02:44:18,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:18,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403148758] [2022-03-18 02:44:18,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403148758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:18,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:18,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-18 02:44:18,439 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:18,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [891269981] [2022-03-18 02:44:18,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [891269981] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:18,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:18,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:44:18,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770347466] [2022-03-18 02:44:18,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:18,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:44:18,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:18,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:44:18,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 02:44:18,440 INFO L87 Difference]: Start difference. First operand 321 states and 462 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:44:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:18,542 INFO L93 Difference]: Finished difference Result 335 states and 475 transitions. [2022-03-18 02:44:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:44:18,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 57 [2022-03-18 02:44:18,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:18,545 INFO L225 Difference]: With dead ends: 335 [2022-03-18 02:44:18,545 INFO L226 Difference]: Without dead ends: 328 [2022-03-18 02:44:18,545 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:44:18,546 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 53 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:18,546 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 186 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-18 02:44:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2022-03-18 02:44:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 216 states have (on average 1.337962962962963) internal successors, (289), 226 states have internal predecessors, (289), 89 states have call successors, (89), 19 states have call predecessors, (89), 18 states have return successors, (87), 78 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-18 02:44:18,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 465 transitions. [2022-03-18 02:44:18,605 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 465 transitions. Word has length 57 [2022-03-18 02:44:18,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:18,605 INFO L478 AbstractCegarLoop]: Abstraction has 324 states and 465 transitions. [2022-03-18 02:44:18,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:44:18,605 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 465 transitions. [2022-03-18 02:44:18,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 02:44:18,606 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:18,606 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:18,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:18,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-18 02:44:18,827 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:18,827 INFO L85 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 1 times [2022-03-18 02:44:18,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:18,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [463822263] [2022-03-18 02:44:18,827 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:18,828 INFO L85 PathProgramCache]: Analyzing trace with hash 958119025, now seen corresponding path program 2 times [2022-03-18 02:44:18,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:18,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516098084] [2022-03-18 02:44:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:18,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:18,835 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:18,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41124122] [2022-03-18 02:44:18,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:18,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:18,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:18,837 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:18,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 02:44:18,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:18,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:18,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-18 02:44:18,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 02:44:19,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 02:44:20,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:20,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516098084] [2022-03-18 02:44:20,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:20,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41124122] [2022-03-18 02:44:20,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41124122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:20,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:20,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-03-18 02:44:20,076 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:20,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [463822263] [2022-03-18 02:44:20,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [463822263] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:20,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:20,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:44:20,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988125389] [2022-03-18 02:44:20,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:20,076 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:44:20,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:20,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:44:20,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-03-18 02:44:20,077 INFO L87 Difference]: Start difference. First operand 324 states and 465 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:44:20,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:20,525 INFO L93 Difference]: Finished difference Result 384 states and 559 transitions. [2022-03-18 02:44:20,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:44:20,526 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 58 [2022-03-18 02:44:20,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:20,528 INFO L225 Difference]: With dead ends: 384 [2022-03-18 02:44:20,528 INFO L226 Difference]: Without dead ends: 381 [2022-03-18 02:44:20,529 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-18 02:44:20,529 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 74 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:20,529 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 474 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:44:20,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-03-18 02:44:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 377. [2022-03-18 02:44:20,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 243 states have (on average 1.345679012345679) internal successors, (327), 256 states have internal predecessors, (327), 113 states have call successors, (113), 21 states have call predecessors, (113), 20 states have return successors, (111), 99 states have call predecessors, (111), 111 states have call successors, (111) [2022-03-18 02:44:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 551 transitions. [2022-03-18 02:44:20,572 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 551 transitions. Word has length 58 [2022-03-18 02:44:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:20,572 INFO L478 AbstractCegarLoop]: Abstraction has 377 states and 551 transitions. [2022-03-18 02:44:20,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:44:20,572 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 551 transitions. [2022-03-18 02:44:20,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 02:44:20,573 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:20,573 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:20,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:20,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 02:44:20,793 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:20,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:20,794 INFO L85 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 1 times [2022-03-18 02:44:20,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:20,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1679979548] [2022-03-18 02:44:20,794 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:20,794 INFO L85 PathProgramCache]: Analyzing trace with hash 27973409, now seen corresponding path program 2 times [2022-03-18 02:44:20,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:20,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428410630] [2022-03-18 02:44:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:20,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:20,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:20,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680207081] [2022-03-18 02:44:20,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:20,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:20,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:20,803 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:20,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 02:44:20,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:20,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:20,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 02:44:20,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:44:21,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:44:21,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:21,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428410630] [2022-03-18 02:44:21,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:21,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680207081] [2022-03-18 02:44:21,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680207081] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:21,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:21,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-18 02:44:21,155 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:21,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1679979548] [2022-03-18 02:44:21,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1679979548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:21,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:21,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:44:21,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109713903] [2022-03-18 02:44:21,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:21,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:44:21,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:21,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:44:21,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:44:21,157 INFO L87 Difference]: Start difference. First operand 377 states and 551 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:44:21,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:21,279 INFO L93 Difference]: Finished difference Result 604 states and 873 transitions. [2022-03-18 02:44:21,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:44:21,280 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 63 [2022-03-18 02:44:21,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:21,282 INFO L225 Difference]: With dead ends: 604 [2022-03-18 02:44:21,282 INFO L226 Difference]: Without dead ends: 440 [2022-03-18 02:44:21,283 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2022-03-18 02:44:21,284 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 69 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:21,284 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 216 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:21,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-03-18 02:44:21,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 426. [2022-03-18 02:44:21,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 279 states have (on average 1.3118279569892473) internal successors, (366), 290 states have internal predecessors, (366), 117 states have call successors, (117), 30 states have call predecessors, (117), 29 states have return successors, (115), 105 states have call predecessors, (115), 115 states have call successors, (115) [2022-03-18 02:44:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 598 transitions. [2022-03-18 02:44:21,363 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 598 transitions. Word has length 63 [2022-03-18 02:44:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:21,363 INFO L478 AbstractCegarLoop]: Abstraction has 426 states and 598 transitions. [2022-03-18 02:44:21,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:44:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 598 transitions. [2022-03-18 02:44:21,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-18 02:44:21,364 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:21,365 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:21,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:21,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 02:44:21,583 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:21,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:21,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 3 times [2022-03-18 02:44:21,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:21,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1757232773] [2022-03-18 02:44:21,585 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:21,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1288112160, now seen corresponding path program 4 times [2022-03-18 02:44:21,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:21,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450666907] [2022-03-18 02:44:21,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:21,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:21,593 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:21,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124620899] [2022-03-18 02:44:21,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:44:21,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:21,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:21,594 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:21,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 02:44:21,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:44:21,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:21,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 02:44:21,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:44:21,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:44:21,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:21,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450666907] [2022-03-18 02:44:21,955 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:21,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124620899] [2022-03-18 02:44:21,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124620899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:21,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:21,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-18 02:44:21,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:21,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1757232773] [2022-03-18 02:44:21,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1757232773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:21,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:21,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:44:21,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738814024] [2022-03-18 02:44:21,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:21,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:44:21,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:21,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:44:21,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:44:21,957 INFO L87 Difference]: Start difference. First operand 426 states and 598 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:44:22,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:22,124 INFO L93 Difference]: Finished difference Result 531 states and 722 transitions. [2022-03-18 02:44:22,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 02:44:22,124 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 64 [2022-03-18 02:44:22,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:22,127 INFO L225 Difference]: With dead ends: 531 [2022-03-18 02:44:22,127 INFO L226 Difference]: Without dead ends: 524 [2022-03-18 02:44:22,128 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=188, Invalid=274, Unknown=0, NotChecked=0, Total=462 [2022-03-18 02:44:22,128 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 108 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:22,128 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 240 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:22,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-03-18 02:44:22,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 503. [2022-03-18 02:44:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 330 states have (on average 1.290909090909091) internal successors, (426), 346 states have internal predecessors, (426), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-18 02:44:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 691 transitions. [2022-03-18 02:44:22,181 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 691 transitions. Word has length 64 [2022-03-18 02:44:22,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:22,181 INFO L478 AbstractCegarLoop]: Abstraction has 503 states and 691 transitions. [2022-03-18 02:44:22,182 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:44:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 691 transitions. [2022-03-18 02:44:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-18 02:44:22,182 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:22,183 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:22,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:22,400 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:22,400 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:22,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:22,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1156119236, now seen corresponding path program 1 times [2022-03-18 02:44:22,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:22,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [123875367] [2022-03-18 02:44:22,401 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:22,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1156119236, now seen corresponding path program 2 times [2022-03-18 02:44:22,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:22,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136314642] [2022-03-18 02:44:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:22,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:22,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:22,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107415725] [2022-03-18 02:44:22,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:22,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:22,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:22,412 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:22,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 02:44:22,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:22,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:22,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 02:44:22,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-18 02:44:22,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-03-18 02:44:22,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:22,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136314642] [2022-03-18 02:44:22,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:22,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107415725] [2022-03-18 02:44:22,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107415725] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 02:44:22,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:44:22,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-03-18 02:44:22,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:22,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [123875367] [2022-03-18 02:44:22,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [123875367] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:22,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:22,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:44:22,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293531655] [2022-03-18 02:44:22,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:22,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:44:22,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:22,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:44:22,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-18 02:44:22,793 INFO L87 Difference]: Start difference. First operand 503 states and 691 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:44:22,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:22,876 INFO L93 Difference]: Finished difference Result 517 states and 704 transitions. [2022-03-18 02:44:22,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 02:44:22,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-03-18 02:44:22,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:22,880 INFO L225 Difference]: With dead ends: 517 [2022-03-18 02:44:22,880 INFO L226 Difference]: Without dead ends: 515 [2022-03-18 02:44:22,880 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:44:22,881 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 12 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:22,881 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 150 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:44:22,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-03-18 02:44:22,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 511. [2022-03-18 02:44:22,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 336 states have (on average 1.2797619047619047) internal successors, (430), 352 states have internal predecessors, (430), 134 states have call successors, (134), 41 states have call predecessors, (134), 40 states have return successors, (131), 117 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-18 02:44:22,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 695 transitions. [2022-03-18 02:44:22,940 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 695 transitions. Word has length 67 [2022-03-18 02:44:22,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:22,941 INFO L478 AbstractCegarLoop]: Abstraction has 511 states and 695 transitions. [2022-03-18 02:44:22,941 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:44:22,941 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 695 transitions. [2022-03-18 02:44:22,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 02:44:22,942 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:22,942 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:22,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:23,165 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:23,165 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:23,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:23,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1261753774, now seen corresponding path program 3 times [2022-03-18 02:44:23,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:23,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [414613955] [2022-03-18 02:44:23,166 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:23,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1261753774, now seen corresponding path program 4 times [2022-03-18 02:44:23,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:23,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031205278] [2022-03-18 02:44:23,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:23,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:23,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:23,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202131365] [2022-03-18 02:44:23,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:44:23,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:23,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:23,183 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:23,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 02:44:23,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:44:23,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:23,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-18 02:44:23,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:44:23,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:44:23,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:23,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031205278] [2022-03-18 02:44:23,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:23,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202131365] [2022-03-18 02:44:23,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202131365] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:23,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:23,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-03-18 02:44:23,427 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:23,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [414613955] [2022-03-18 02:44:23,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [414613955] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:23,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:23,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:44:23,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048962350] [2022-03-18 02:44:23,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:23,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:44:23,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:23,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:44:23,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:44:23,428 INFO L87 Difference]: Start difference. First operand 511 states and 695 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:44:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:23,824 INFO L93 Difference]: Finished difference Result 857 states and 1271 transitions. [2022-03-18 02:44:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 02:44:23,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-03-18 02:44:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:23,829 INFO L225 Difference]: With dead ends: 857 [2022-03-18 02:44:23,829 INFO L226 Difference]: Without dead ends: 850 [2022-03-18 02:44:23,830 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-03-18 02:44:23,830 INFO L912 BasicCegarLoop]: 118 mSDtfsCounter, 81 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:23,830 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 572 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:44:23,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-03-18 02:44:23,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 567. [2022-03-18 02:44:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 380 states have (on average 1.3) internal successors, (494), 395 states have internal predecessors, (494), 146 states have call successors, (146), 41 states have call predecessors, (146), 40 states have return successors, (143), 130 states have call predecessors, (143), 143 states have call successors, (143) [2022-03-18 02:44:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 783 transitions. [2022-03-18 02:44:23,931 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 783 transitions. Word has length 65 [2022-03-18 02:44:23,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:23,932 INFO L478 AbstractCegarLoop]: Abstraction has 567 states and 783 transitions. [2022-03-18 02:44:23,932 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:44:23,932 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 783 transitions. [2022-03-18 02:44:23,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 02:44:23,933 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:23,933 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:23,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:24,147 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-18 02:44:24,147 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:24,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:24,148 INFO L85 PathProgramCache]: Analyzing trace with hash 365174246, now seen corresponding path program 1 times [2022-03-18 02:44:24,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:24,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [871244357] [2022-03-18 02:44:24,148 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:24,148 INFO L85 PathProgramCache]: Analyzing trace with hash 365174246, now seen corresponding path program 2 times [2022-03-18 02:44:24,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:24,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488342909] [2022-03-18 02:44:24,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:24,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:24,155 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:24,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510651021] [2022-03-18 02:44:24,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:24,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:24,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:24,157 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:24,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 02:44:24,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:24,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:24,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 02:44:24,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:44:24,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:24,469 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:44:24,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:24,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488342909] [2022-03-18 02:44:24,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:24,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510651021] [2022-03-18 02:44:24,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510651021] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:24,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:24,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-18 02:44:24,470 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:24,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [871244357] [2022-03-18 02:44:24,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [871244357] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:24,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:24,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 02:44:24,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095264088] [2022-03-18 02:44:24,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:24,471 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 02:44:24,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:24,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 02:44:24,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:44:24,471 INFO L87 Difference]: Start difference. First operand 567 states and 783 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:44:24,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:24,628 INFO L93 Difference]: Finished difference Result 839 states and 1203 transitions. [2022-03-18 02:44:24,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:44:24,628 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-03-18 02:44:24,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:24,631 INFO L225 Difference]: With dead ends: 839 [2022-03-18 02:44:24,631 INFO L226 Difference]: Without dead ends: 567 [2022-03-18 02:44:24,633 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-03-18 02:44:24,633 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 63 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:24,633 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 221 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:24,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-03-18 02:44:24,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2022-03-18 02:44:24,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 380 states have (on average 1.2894736842105263) internal successors, (490), 395 states have internal predecessors, (490), 146 states have call successors, (146), 41 states have call predecessors, (146), 40 states have return successors, (143), 130 states have call predecessors, (143), 143 states have call successors, (143) [2022-03-18 02:44:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 779 transitions. [2022-03-18 02:44:24,702 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 779 transitions. Word has length 65 [2022-03-18 02:44:24,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:24,702 INFO L478 AbstractCegarLoop]: Abstraction has 567 states and 779 transitions. [2022-03-18 02:44:24,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:44:24,702 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 779 transitions. [2022-03-18 02:44:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 02:44:24,703 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:24,703 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:24,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:24,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-18 02:44:24,923 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:24,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:24,924 INFO L85 PathProgramCache]: Analyzing trace with hash -544828664, now seen corresponding path program 1 times [2022-03-18 02:44:24,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:24,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [861715726] [2022-03-18 02:44:24,924 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:24,924 INFO L85 PathProgramCache]: Analyzing trace with hash -544828664, now seen corresponding path program 2 times [2022-03-18 02:44:24,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:24,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605067669] [2022-03-18 02:44:24,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:24,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:24,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:24,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566350809] [2022-03-18 02:44:24,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:24,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:24,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:24,935 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:24,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 02:44:24,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:24,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:24,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 02:44:24,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-03-18 02:44:25,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 02:44:25,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:25,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605067669] [2022-03-18 02:44:25,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:25,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566350809] [2022-03-18 02:44:25,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566350809] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:25,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:25,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:44:25,105 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:25,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [861715726] [2022-03-18 02:44:25,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [861715726] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:25,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:25,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 02:44:25,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820954094] [2022-03-18 02:44:25,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:25,107 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 02:44:25,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:25,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 02:44:25,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 02:44:25,108 INFO L87 Difference]: Start difference. First operand 567 states and 779 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:44:25,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:25,270 INFO L93 Difference]: Finished difference Result 980 states and 1387 transitions. [2022-03-18 02:44:25,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 02:44:25,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2022-03-18 02:44:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:25,274 INFO L225 Difference]: With dead ends: 980 [2022-03-18 02:44:25,274 INFO L226 Difference]: Without dead ends: 624 [2022-03-18 02:44:25,275 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-18 02:44:25,275 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 11 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:25,276 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 127 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 02:44:25,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-03-18 02:44:25,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 568. [2022-03-18 02:44:25,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 395 states have (on average 1.3012658227848102) internal successors, (514), 400 states have internal predecessors, (514), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 128 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-18 02:44:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 779 transitions. [2022-03-18 02:44:25,352 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 779 transitions. Word has length 69 [2022-03-18 02:44:25,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:25,353 INFO L478 AbstractCegarLoop]: Abstraction has 568 states and 779 transitions. [2022-03-18 02:44:25,353 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:44:25,353 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 779 transitions. [2022-03-18 02:44:25,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-18 02:44:25,354 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:25,354 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:25,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-18 02:44:25,567 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:25,567 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:25,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:25,568 INFO L85 PathProgramCache]: Analyzing trace with hash -996119216, now seen corresponding path program 3 times [2022-03-18 02:44:25,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:25,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1365204375] [2022-03-18 02:44:25,568 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:25,568 INFO L85 PathProgramCache]: Analyzing trace with hash -996119216, now seen corresponding path program 4 times [2022-03-18 02:44:25,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:25,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729665466] [2022-03-18 02:44:25,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:25,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:25,573 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:25,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [875074233] [2022-03-18 02:44:25,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:44:25,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:25,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:25,576 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:25,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 02:44:25,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:44:25,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:25,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 02:44:25,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:44:25,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:44:25,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:25,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729665466] [2022-03-18 02:44:25,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:25,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875074233] [2022-03-18 02:44:25,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875074233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:25,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:25,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-18 02:44:25,902 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:25,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1365204375] [2022-03-18 02:44:25,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1365204375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:25,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:25,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 02:44:25,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252268698] [2022-03-18 02:44:25,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:25,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 02:44:25,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:25,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 02:44:25,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:44:25,903 INFO L87 Difference]: Start difference. First operand 568 states and 779 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:44:26,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:26,085 INFO L93 Difference]: Finished difference Result 914 states and 1304 transitions. [2022-03-18 02:44:26,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 02:44:26,085 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 69 [2022-03-18 02:44:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:26,088 INFO L225 Difference]: With dead ends: 914 [2022-03-18 02:44:26,088 INFO L226 Difference]: Without dead ends: 584 [2022-03-18 02:44:26,091 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=277, Unknown=0, NotChecked=0, Total=462 [2022-03-18 02:44:26,092 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 101 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:26,092 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 238 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:26,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-03-18 02:44:26,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 575. [2022-03-18 02:44:26,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 402 states have (on average 1.2960199004975124) internal successors, (521), 404 states have internal predecessors, (521), 134 states have call successors, (134), 39 states have call predecessors, (134), 38 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-03-18 02:44:26,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 786 transitions. [2022-03-18 02:44:26,171 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 786 transitions. Word has length 69 [2022-03-18 02:44:26,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:26,171 INFO L478 AbstractCegarLoop]: Abstraction has 575 states and 786 transitions. [2022-03-18 02:44:26,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:44:26,172 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 786 transitions. [2022-03-18 02:44:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-18 02:44:26,172 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:26,172 INFO L500 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:26,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:26,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:26,391 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:26,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:26,392 INFO L85 PathProgramCache]: Analyzing trace with hash 862858316, now seen corresponding path program 3 times [2022-03-18 02:44:26,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:26,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [123959948] [2022-03-18 02:44:26,392 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:26,392 INFO L85 PathProgramCache]: Analyzing trace with hash 862858316, now seen corresponding path program 4 times [2022-03-18 02:44:26,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:26,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572108481] [2022-03-18 02:44:26,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:26,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:26,399 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:26,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527183897] [2022-03-18 02:44:26,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:44:26,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:26,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:26,401 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:26,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 02:44:26,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:44:26,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:26,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 02:44:26,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:44:26,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:44:26,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:26,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572108481] [2022-03-18 02:44:26,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:26,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527183897] [2022-03-18 02:44:26,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527183897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:26,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:26,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-18 02:44:26,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:26,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [123959948] [2022-03-18 02:44:26,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [123959948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:26,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:26,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:44:26,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869624473] [2022-03-18 02:44:26,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:26,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:44:26,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:26,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:44:26,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-18 02:44:26,782 INFO L87 Difference]: Start difference. First operand 575 states and 786 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:44:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:26,994 INFO L93 Difference]: Finished difference Result 918 states and 1274 transitions. [2022-03-18 02:44:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 02:44:26,994 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 70 [2022-03-18 02:44:26,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:26,998 INFO L225 Difference]: With dead ends: 918 [2022-03-18 02:44:26,998 INFO L226 Difference]: Without dead ends: 688 [2022-03-18 02:44:27,000 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=244, Invalid=356, Unknown=0, NotChecked=0, Total=600 [2022-03-18 02:44:27,000 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 124 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:27,000 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 278 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:27,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-03-18 02:44:27,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 658. [2022-03-18 02:44:27,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 457 states have (on average 1.2735229759299782) internal successors, (582), 460 states have internal predecessors, (582), 151 states have call successors, (151), 50 states have call predecessors, (151), 49 states have return successors, (147), 147 states have call predecessors, (147), 147 states have call successors, (147) [2022-03-18 02:44:27,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 880 transitions. [2022-03-18 02:44:27,102 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 880 transitions. Word has length 70 [2022-03-18 02:44:27,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:27,102 INFO L478 AbstractCegarLoop]: Abstraction has 658 states and 880 transitions. [2022-03-18 02:44:27,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:44:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 880 transitions. [2022-03-18 02:44:27,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-18 02:44:27,104 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:27,105 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:27,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:27,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-18 02:44:27,319 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:27,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1546062343, now seen corresponding path program 1 times [2022-03-18 02:44:27,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:27,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [422494714] [2022-03-18 02:44:27,320 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1546062343, now seen corresponding path program 2 times [2022-03-18 02:44:27,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:27,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089153129] [2022-03-18 02:44:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:27,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:27,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:27,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878141231] [2022-03-18 02:44:27,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:27,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:27,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:27,328 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:27,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 02:44:27,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:27,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:27,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 02:44:27,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 02:44:27,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-18 02:44:27,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:27,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089153129] [2022-03-18 02:44:27,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:27,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878141231] [2022-03-18 02:44:27,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878141231] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:27,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:27,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 02:44:27,616 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:27,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [422494714] [2022-03-18 02:44:27,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [422494714] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:27,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:27,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 02:44:27,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710439624] [2022-03-18 02:44:27,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:27,617 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 02:44:27,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:27,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 02:44:27,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 02:44:27,618 INFO L87 Difference]: Start difference. First operand 658 states and 880 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:44:27,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:27,848 INFO L93 Difference]: Finished difference Result 757 states and 1022 transitions. [2022-03-18 02:44:27,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 02:44:27,849 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2022-03-18 02:44:27,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:27,853 INFO L225 Difference]: With dead ends: 757 [2022-03-18 02:44:27,853 INFO L226 Difference]: Without dead ends: 755 [2022-03-18 02:44:27,853 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:44:27,854 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:27,854 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 202 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:27,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-03-18 02:44:27,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 748. [2022-03-18 02:44:27,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 537 states have (on average 1.297951582867784) internal successors, (697), 546 states have internal predecessors, (697), 160 states have call successors, (160), 51 states have call predecessors, (160), 50 states have return successors, (156), 150 states have call predecessors, (156), 156 states have call successors, (156) [2022-03-18 02:44:27,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 1013 transitions. [2022-03-18 02:44:27,980 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 1013 transitions. Word has length 70 [2022-03-18 02:44:27,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:27,981 INFO L478 AbstractCegarLoop]: Abstraction has 748 states and 1013 transitions. [2022-03-18 02:44:27,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-18 02:44:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 1013 transitions. [2022-03-18 02:44:27,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 02:44:27,984 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:27,984 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:28,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:28,206 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-18 02:44:28,206 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:28,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:28,207 INFO L85 PathProgramCache]: Analyzing trace with hash -705069158, now seen corresponding path program 3 times [2022-03-18 02:44:28,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:28,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1558790967] [2022-03-18 02:44:28,207 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:28,207 INFO L85 PathProgramCache]: Analyzing trace with hash -705069158, now seen corresponding path program 4 times [2022-03-18 02:44:28,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:28,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957356505] [2022-03-18 02:44:28,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:28,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:28,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:28,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423918725] [2022-03-18 02:44:28,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:44:28,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:28,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:28,220 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:28,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 02:44:28,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:44:28,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:28,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-18 02:44:28,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:28,912 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-18 02:44:28,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-18 02:44:29,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:29,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957356505] [2022-03-18 02:44:29,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:29,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423918725] [2022-03-18 02:44:29,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423918725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:29,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:29,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 22 [2022-03-18 02:44:29,392 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:29,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1558790967] [2022-03-18 02:44:29,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1558790967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:29,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:29,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 02:44:29,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182188442] [2022-03-18 02:44:29,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:29,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 02:44:29,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:29,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 02:44:29,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2022-03-18 02:44:29,394 INFO L87 Difference]: Start difference. First operand 748 states and 1013 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-18 02:44:29,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:29,900 INFO L93 Difference]: Finished difference Result 840 states and 1136 transitions. [2022-03-18 02:44:29,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 02:44:29,900 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 75 [2022-03-18 02:44:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:29,903 INFO L225 Difference]: With dead ends: 840 [2022-03-18 02:44:29,904 INFO L226 Difference]: Without dead ends: 838 [2022-03-18 02:44:29,904 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2022-03-18 02:44:29,905 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 75 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:29,905 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 588 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:44:29,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-03-18 02:44:29,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 813. [2022-03-18 02:44:29,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 579 states have (on average 1.302245250431779) internal successors, (754), 589 states have internal predecessors, (754), 178 states have call successors, (178), 56 states have call predecessors, (178), 55 states have return successors, (174), 167 states have call predecessors, (174), 174 states have call successors, (174) [2022-03-18 02:44:30,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1106 transitions. [2022-03-18 02:44:30,002 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1106 transitions. Word has length 75 [2022-03-18 02:44:30,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:30,002 INFO L478 AbstractCegarLoop]: Abstraction has 813 states and 1106 transitions. [2022-03-18 02:44:30,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-18 02:44:30,002 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1106 transitions. [2022-03-18 02:44:30,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-18 02:44:30,003 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:30,003 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:30,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-18 02:44:30,209 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-18 02:44:30,209 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:30,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:30,210 INFO L85 PathProgramCache]: Analyzing trace with hash -949871629, now seen corresponding path program 5 times [2022-03-18 02:44:30,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:30,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [476238449] [2022-03-18 02:44:30,210 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:30,210 INFO L85 PathProgramCache]: Analyzing trace with hash -949871629, now seen corresponding path program 6 times [2022-03-18 02:44:30,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:30,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885394247] [2022-03-18 02:44:30,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:30,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:30,216 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:30,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930663190] [2022-03-18 02:44:30,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:44:30,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:30,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:30,218 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:30,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 02:44:30,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 02:44:30,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:30,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 02:44:30,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:44:30,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 02:44:30,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:30,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885394247] [2022-03-18 02:44:30,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:30,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930663190] [2022-03-18 02:44:30,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930663190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:30,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:30,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-18 02:44:30,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:30,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [476238449] [2022-03-18 02:44:30,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [476238449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:30,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:30,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:44:30,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853968702] [2022-03-18 02:44:30,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:30,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:44:30,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:30,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:44:30,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-18 02:44:30,611 INFO L87 Difference]: Start difference. First operand 813 states and 1106 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:44:30,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:30,888 INFO L93 Difference]: Finished difference Result 1433 states and 1997 transitions. [2022-03-18 02:44:30,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 02:44:30,888 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 76 [2022-03-18 02:44:30,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:30,893 INFO L225 Difference]: With dead ends: 1433 [2022-03-18 02:44:30,893 INFO L226 Difference]: Without dead ends: 975 [2022-03-18 02:44:30,895 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2022-03-18 02:44:30,896 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 145 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:30,896 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 307 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:30,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-03-18 02:44:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 947. [2022-03-18 02:44:31,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 673 states have (on average 1.274888558692422) internal successors, (858), 683 states have internal predecessors, (858), 205 states have call successors, (205), 69 states have call predecessors, (205), 68 states have return successors, (200), 194 states have call predecessors, (200), 200 states have call successors, (200) [2022-03-18 02:44:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1263 transitions. [2022-03-18 02:44:31,006 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1263 transitions. Word has length 76 [2022-03-18 02:44:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:31,007 INFO L478 AbstractCegarLoop]: Abstraction has 947 states and 1263 transitions. [2022-03-18 02:44:31,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 02:44:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1263 transitions. [2022-03-18 02:44:31,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-18 02:44:31,007 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:31,007 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:31,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-18 02:44:31,208 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-18 02:44:31,208 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:31,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:31,208 INFO L85 PathProgramCache]: Analyzing trace with hash -362795852, now seen corresponding path program 1 times [2022-03-18 02:44:31,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:31,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2089395858] [2022-03-18 02:44:31,209 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:31,209 INFO L85 PathProgramCache]: Analyzing trace with hash -362795852, now seen corresponding path program 2 times [2022-03-18 02:44:31,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:31,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875071392] [2022-03-18 02:44:31,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:31,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:31,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:31,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342557570] [2022-03-18 02:44:31,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:31,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:31,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:31,216 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:31,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 02:44:31,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:31,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:31,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-18 02:44:31,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-18 02:44:31,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-18 02:44:34,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:34,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875071392] [2022-03-18 02:44:34,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:34,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342557570] [2022-03-18 02:44:34,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342557570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:34,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:34,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-18 02:44:34,105 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:34,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2089395858] [2022-03-18 02:44:34,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2089395858] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:34,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:34,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:44:34,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712833378] [2022-03-18 02:44:34,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:34,105 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:44:34,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:34,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:44:34,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-03-18 02:44:34,106 INFO L87 Difference]: Start difference. First operand 947 states and 1263 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-18 02:44:35,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:35,062 INFO L93 Difference]: Finished difference Result 1025 states and 1371 transitions. [2022-03-18 02:44:35,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 02:44:35,063 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 81 [2022-03-18 02:44:35,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:35,067 INFO L225 Difference]: With dead ends: 1025 [2022-03-18 02:44:35,067 INFO L226 Difference]: Without dead ends: 1022 [2022-03-18 02:44:35,068 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-03-18 02:44:35,069 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 76 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:35,069 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 553 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:44:35,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-03-18 02:44:35,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 957. [2022-03-18 02:44:35,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 679 states have (on average 1.2695139911634756) internal successors, (862), 689 states have internal predecessors, (862), 207 states have call successors, (207), 71 states have call predecessors, (207), 70 states have return successors, (203), 196 states have call predecessors, (203), 203 states have call successors, (203) [2022-03-18 02:44:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1272 transitions. [2022-03-18 02:44:35,201 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1272 transitions. Word has length 81 [2022-03-18 02:44:35,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:35,202 INFO L478 AbstractCegarLoop]: Abstraction has 957 states and 1272 transitions. [2022-03-18 02:44:35,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-03-18 02:44:35,202 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1272 transitions. [2022-03-18 02:44:35,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-18 02:44:35,203 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:35,203 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:35,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-18 02:44:35,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-18 02:44:35,415 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:35,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2112645673, now seen corresponding path program 1 times [2022-03-18 02:44:35,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:35,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1442353174] [2022-03-18 02:44:35,416 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:35,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2112645673, now seen corresponding path program 2 times [2022-03-18 02:44:35,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:35,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315982877] [2022-03-18 02:44:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:35,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:35,422 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:35,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614015630] [2022-03-18 02:44:35,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:35,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:35,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:35,423 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:35,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 02:44:35,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:35,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:35,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 02:44:35,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 88 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 02:44:35,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-18 02:44:35,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:35,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315982877] [2022-03-18 02:44:35,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:35,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614015630] [2022-03-18 02:44:35,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614015630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:35,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:35,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-18 02:44:35,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:35,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1442353174] [2022-03-18 02:44:35,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1442353174] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:35,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:35,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 02:44:35,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334418508] [2022-03-18 02:44:35,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:35,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 02:44:35,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:35,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 02:44:35,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-18 02:44:35,844 INFO L87 Difference]: Start difference. First operand 957 states and 1272 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:36,080 INFO L93 Difference]: Finished difference Result 966 states and 1279 transitions. [2022-03-18 02:44:36,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 02:44:36,081 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2022-03-18 02:44:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:36,084 INFO L225 Difference]: With dead ends: 966 [2022-03-18 02:44:36,084 INFO L226 Difference]: Without dead ends: 959 [2022-03-18 02:44:36,085 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=246, Invalid=354, Unknown=0, NotChecked=0, Total=600 [2022-03-18 02:44:36,086 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 125 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:36,086 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 280 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:36,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-03-18 02:44:36,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 957. [2022-03-18 02:44:36,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 679 states have (on average 1.2665684830633284) internal successors, (860), 689 states have internal predecessors, (860), 207 states have call successors, (207), 71 states have call predecessors, (207), 70 states have return successors, (203), 196 states have call predecessors, (203), 203 states have call successors, (203) [2022-03-18 02:44:36,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1270 transitions. [2022-03-18 02:44:36,282 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1270 transitions. Word has length 87 [2022-03-18 02:44:36,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:36,283 INFO L478 AbstractCegarLoop]: Abstraction has 957 states and 1270 transitions. [2022-03-18 02:44:36,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:36,283 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1270 transitions. [2022-03-18 02:44:36,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-18 02:44:36,284 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:36,284 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:36,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:36,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:36,499 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:36,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:36,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1082523945, now seen corresponding path program 3 times [2022-03-18 02:44:36,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:36,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [232089287] [2022-03-18 02:44:36,500 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:36,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1082523945, now seen corresponding path program 4 times [2022-03-18 02:44:36,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:36,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726762131] [2022-03-18 02:44:36,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:36,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:36,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:36,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609926491] [2022-03-18 02:44:36,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:44:36,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:36,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:36,508 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:36,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 02:44:36,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:44:36,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:36,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-18 02:44:36,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 52 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-03-18 02:44:37,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-18 02:44:41,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:41,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726762131] [2022-03-18 02:44:41,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:41,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609926491] [2022-03-18 02:44:41,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609926491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:41,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:41,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2022-03-18 02:44:41,087 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:41,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [232089287] [2022-03-18 02:44:41,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [232089287] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:41,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:41,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:44:41,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134591089] [2022-03-18 02:44:41,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:41,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:44:41,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:41,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:44:41,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-03-18 02:44:41,088 INFO L87 Difference]: Start difference. First operand 957 states and 1270 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:41,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:41,825 INFO L93 Difference]: Finished difference Result 1073 states and 1433 transitions. [2022-03-18 02:44:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 02:44:41,826 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 88 [2022-03-18 02:44:41,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:41,831 INFO L225 Difference]: With dead ends: 1073 [2022-03-18 02:44:41,831 INFO L226 Difference]: Without dead ends: 1070 [2022-03-18 02:44:41,832 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-03-18 02:44:41,832 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 91 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:41,833 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 844 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:44:41,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-03-18 02:44:41,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 1027. [2022-03-18 02:44:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 723 states have (on average 1.2738589211618256) internal successors, (921), 734 states have internal predecessors, (921), 229 states have call successors, (229), 75 states have call predecessors, (229), 74 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-03-18 02:44:41,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1375 transitions. [2022-03-18 02:44:41,988 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1375 transitions. Word has length 88 [2022-03-18 02:44:41,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:41,988 INFO L478 AbstractCegarLoop]: Abstraction has 1027 states and 1375 transitions. [2022-03-18 02:44:41,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:41,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1375 transitions. [2022-03-18 02:44:41,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-18 02:44:41,989 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:41,990 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:42,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:42,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-18 02:44:42,203 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:42,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:42,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1791236545, now seen corresponding path program 5 times [2022-03-18 02:44:42,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:42,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2139656808] [2022-03-18 02:44:42,204 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:42,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1791236545, now seen corresponding path program 6 times [2022-03-18 02:44:42,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:42,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837798582] [2022-03-18 02:44:42,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:42,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:42,210 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:42,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1196505414] [2022-03-18 02:44:42,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:44:42,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:42,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:42,213 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:42,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 02:44:42,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 02:44:42,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:42,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 02:44:42,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 02:44:42,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-18 02:44:42,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:42,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837798582] [2022-03-18 02:44:42,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:42,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196505414] [2022-03-18 02:44:42,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196505414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:42,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:42,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-18 02:44:42,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:42,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2139656808] [2022-03-18 02:44:42,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2139656808] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:42,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:42,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:44:42,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107625458] [2022-03-18 02:44:42,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:42,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:44:42,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:42,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:44:42,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-18 02:44:42,674 INFO L87 Difference]: Start difference. First operand 1027 states and 1375 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:42,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:42,944 INFO L93 Difference]: Finished difference Result 1062 states and 1410 transitions. [2022-03-18 02:44:42,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 02:44:42,944 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 91 [2022-03-18 02:44:42,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:42,948 INFO L225 Difference]: With dead ends: 1062 [2022-03-18 02:44:42,948 INFO L226 Difference]: Without dead ends: 1055 [2022-03-18 02:44:42,948 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=444, Unknown=0, NotChecked=0, Total=756 [2022-03-18 02:44:42,949 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 170 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:42,949 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 293 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:42,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-03-18 02:44:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1038. [2022-03-18 02:44:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 734 states have (on average 1.2697547683923707) internal successors, (932), 745 states have internal predecessors, (932), 229 states have call successors, (229), 75 states have call predecessors, (229), 74 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-03-18 02:44:43,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1386 transitions. [2022-03-18 02:44:43,117 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1386 transitions. Word has length 91 [2022-03-18 02:44:43,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:43,118 INFO L478 AbstractCegarLoop]: Abstraction has 1038 states and 1386 transitions. [2022-03-18 02:44:43,118 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:43,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1386 transitions. [2022-03-18 02:44:43,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-18 02:44:43,119 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:43,119 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:43,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:43,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:43,339 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:43,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:43,340 INFO L85 PathProgramCache]: Analyzing trace with hash -554609469, now seen corresponding path program 1 times [2022-03-18 02:44:43,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:43,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1879363216] [2022-03-18 02:44:43,341 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:43,341 INFO L85 PathProgramCache]: Analyzing trace with hash -554609469, now seen corresponding path program 2 times [2022-03-18 02:44:43,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:43,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683412305] [2022-03-18 02:44:43,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:43,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:43,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:43,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710657672] [2022-03-18 02:44:43,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:43,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:43,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:43,351 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:43,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 02:44:43,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:43,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:43,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 02:44:43,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 02:44:43,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 24 proven. 32 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-18 02:44:43,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:43,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683412305] [2022-03-18 02:44:43,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:43,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710657672] [2022-03-18 02:44:43,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710657672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:43,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:43,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-18 02:44:43,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:43,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1879363216] [2022-03-18 02:44:43,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1879363216] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:43,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:43,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:44:43,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800679477] [2022-03-18 02:44:43,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:43,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:44:43,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:43,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:44:43,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-18 02:44:43,817 INFO L87 Difference]: Start difference. First operand 1038 states and 1386 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:44,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:44,103 INFO L93 Difference]: Finished difference Result 1382 states and 1902 transitions. [2022-03-18 02:44:44,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 02:44:44,104 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 93 [2022-03-18 02:44:44,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:44,108 INFO L225 Difference]: With dead ends: 1382 [2022-03-18 02:44:44,108 INFO L226 Difference]: Without dead ends: 1062 [2022-03-18 02:44:44,110 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=446, Unknown=0, NotChecked=0, Total=756 [2022-03-18 02:44:44,110 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 155 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:44,110 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 301 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:44,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2022-03-18 02:44:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 1058. [2022-03-18 02:44:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 754 states have (on average 1.2612732095490715) internal successors, (951), 765 states have internal predecessors, (951), 229 states have call successors, (229), 75 states have call predecessors, (229), 74 states have return successors, (225), 217 states have call predecessors, (225), 225 states have call successors, (225) [2022-03-18 02:44:44,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1405 transitions. [2022-03-18 02:44:44,259 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1405 transitions. Word has length 93 [2022-03-18 02:44:44,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:44,259 INFO L478 AbstractCegarLoop]: Abstraction has 1058 states and 1405 transitions. [2022-03-18 02:44:44,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:44,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1405 transitions. [2022-03-18 02:44:44,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 02:44:44,261 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:44,261 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:44,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-18 02:44:44,480 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:44,480 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:44,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:44,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2034142563, now seen corresponding path program 5 times [2022-03-18 02:44:44,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:44,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1803838028] [2022-03-18 02:44:44,481 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:44,481 INFO L85 PathProgramCache]: Analyzing trace with hash -2034142563, now seen corresponding path program 6 times [2022-03-18 02:44:44,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:44,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656100942] [2022-03-18 02:44:44,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:44,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:44,487 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:44,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650264415] [2022-03-18 02:44:44,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:44:44,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:44,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:44,489 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:44,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 02:44:44,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 02:44:44,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:44,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 02:44:44,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:44,842 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 02:44:44,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-18 02:44:45,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:45,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656100942] [2022-03-18 02:44:45,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:45,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650264415] [2022-03-18 02:44:45,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650264415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:45,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:45,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-18 02:44:45,120 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:45,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1803838028] [2022-03-18 02:44:45,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1803838028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:45,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:45,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:44:45,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335343222] [2022-03-18 02:44:45,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:45,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:44:45,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:45,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:44:45,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-18 02:44:45,122 INFO L87 Difference]: Start difference. First operand 1058 states and 1405 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:45,475 INFO L93 Difference]: Finished difference Result 1539 states and 2090 transitions. [2022-03-18 02:44:45,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 02:44:45,476 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2022-03-18 02:44:45,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:45,480 INFO L225 Difference]: With dead ends: 1539 [2022-03-18 02:44:45,481 INFO L226 Difference]: Without dead ends: 1219 [2022-03-18 02:44:45,482 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2022-03-18 02:44:45,482 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 187 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:45,482 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 327 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:45,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-03-18 02:44:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1164. [2022-03-18 02:44:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 812 states have (on average 1.2561576354679802) internal successors, (1020), 824 states have internal predecessors, (1020), 262 states have call successors, (262), 90 states have call predecessors, (262), 89 states have return successors, (257), 249 states have call predecessors, (257), 257 states have call successors, (257) [2022-03-18 02:44:45,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 1539 transitions. [2022-03-18 02:44:45,664 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 1539 transitions. Word has length 97 [2022-03-18 02:44:45,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:45,664 INFO L478 AbstractCegarLoop]: Abstraction has 1164 states and 1539 transitions. [2022-03-18 02:44:45,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:45,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 1539 transitions. [2022-03-18 02:44:45,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-18 02:44:45,666 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:45,666 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:45,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:45,878 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-18 02:44:45,878 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:45,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:45,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1787026468, now seen corresponding path program 7 times [2022-03-18 02:44:45,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:45,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [133477636] [2022-03-18 02:44:45,879 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:45,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1787026468, now seen corresponding path program 8 times [2022-03-18 02:44:45,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:45,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876622899] [2022-03-18 02:44:45,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:45,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:45,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:45,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758955758] [2022-03-18 02:44:45,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:45,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:45,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:45,888 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:45,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 02:44:45,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:45,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:45,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 02:44:45,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 120 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 02:44:46,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-18 02:44:46,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:46,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876622899] [2022-03-18 02:44:46,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:46,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758955758] [2022-03-18 02:44:46,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758955758] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:46,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:46,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-18 02:44:46,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:46,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [133477636] [2022-03-18 02:44:46,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [133477636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:46,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:46,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 02:44:46,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843390088] [2022-03-18 02:44:46,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:46,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 02:44:46,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:46,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 02:44:46,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-18 02:44:46,408 INFO L87 Difference]: Start difference. First operand 1164 states and 1539 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:46,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:46,759 INFO L93 Difference]: Finished difference Result 1434 states and 1877 transitions. [2022-03-18 02:44:46,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 02:44:46,760 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 98 [2022-03-18 02:44:46,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:46,765 INFO L225 Difference]: With dead ends: 1434 [2022-03-18 02:44:46,765 INFO L226 Difference]: Without dead ends: 1427 [2022-03-18 02:44:46,766 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=468, Invalid=654, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 02:44:46,766 INFO L912 BasicCegarLoop]: 77 mSDtfsCounter, 218 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:46,766 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 327 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:44:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2022-03-18 02:44:46,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1358. [2022-03-18 02:44:46,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 940 states have (on average 1.2446808510638299) internal successors, (1170), 965 states have internal predecessors, (1170), 311 states have call successors, (311), 107 states have call predecessors, (311), 106 states have return successors, (305), 285 states have call predecessors, (305), 305 states have call successors, (305) [2022-03-18 02:44:46,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 1786 transitions. [2022-03-18 02:44:46,966 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 1786 transitions. Word has length 98 [2022-03-18 02:44:46,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:46,966 INFO L478 AbstractCegarLoop]: Abstraction has 1358 states and 1786 transitions. [2022-03-18 02:44:46,966 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:46,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 1786 transitions. [2022-03-18 02:44:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 02:44:46,968 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:46,968 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:46,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:47,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-18 02:44:47,179 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:47,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:47,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1348351390, now seen corresponding path program 1 times [2022-03-18 02:44:47,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:47,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [382017151] [2022-03-18 02:44:47,180 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:47,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1348351390, now seen corresponding path program 2 times [2022-03-18 02:44:47,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:47,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721442054] [2022-03-18 02:44:47,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:47,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:47,186 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:47,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702320239] [2022-03-18 02:44:47,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:47,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:47,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:47,189 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:47,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 02:44:47,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:47,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:47,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 02:44:47,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 103 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 02:44:47,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 33 proven. 39 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-18 02:44:47,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:47,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721442054] [2022-03-18 02:44:47,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:47,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702320239] [2022-03-18 02:44:47,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702320239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:47,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:47,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-18 02:44:47,721 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:47,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [382017151] [2022-03-18 02:44:47,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [382017151] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:47,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:47,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:44:47,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28041429] [2022-03-18 02:44:47,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:47,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:44:47,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:47,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:44:47,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-18 02:44:47,723 INFO L87 Difference]: Start difference. First operand 1358 states and 1786 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:48,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:48,165 INFO L93 Difference]: Finished difference Result 1838 states and 2503 transitions. [2022-03-18 02:44:48,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 02:44:48,166 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 99 [2022-03-18 02:44:48,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:48,172 INFO L225 Difference]: With dead ends: 1838 [2022-03-18 02:44:48,172 INFO L226 Difference]: Without dead ends: 1358 [2022-03-18 02:44:48,173 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=383, Invalid=547, Unknown=0, NotChecked=0, Total=930 [2022-03-18 02:44:48,174 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 183 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:48,174 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 339 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:44:48,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-03-18 02:44:48,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1334. [2022-03-18 02:44:48,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 924 states have (on average 1.2272727272727273) internal successors, (1134), 948 states have internal predecessors, (1134), 304 states have call successors, (304), 106 states have call predecessors, (304), 105 states have return successors, (298), 279 states have call predecessors, (298), 298 states have call successors, (298) [2022-03-18 02:44:48,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1736 transitions. [2022-03-18 02:44:48,385 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1736 transitions. Word has length 99 [2022-03-18 02:44:48,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:48,385 INFO L478 AbstractCegarLoop]: Abstraction has 1334 states and 1736 transitions. [2022-03-18 02:44:48,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:48,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1736 transitions. [2022-03-18 02:44:48,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 02:44:48,387 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:48,387 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:48,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:48,603 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-18 02:44:48,603 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:48,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:48,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1350164207, now seen corresponding path program 5 times [2022-03-18 02:44:48,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:48,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1919044503] [2022-03-18 02:44:48,604 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:48,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1350164207, now seen corresponding path program 6 times [2022-03-18 02:44:48,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:48,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844571867] [2022-03-18 02:44:48,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:48,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:48,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:48,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966121229] [2022-03-18 02:44:48,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:44:48,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:48,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:48,612 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:48,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-18 02:44:48,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 02:44:48,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:48,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 02:44:48,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:49,278 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:44:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 57 proven. 35 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2022-03-18 02:44:49,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:49,584 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:44:49,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:49,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844571867] [2022-03-18 02:44:49,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:49,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966121229] [2022-03-18 02:44:49,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966121229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:44:49,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:44:49,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-18 02:44:49,756 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:49,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1919044503] [2022-03-18 02:44:49,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1919044503] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:49,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:49,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:44:49,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473795946] [2022-03-18 02:44:49,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:49,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:44:49,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:49,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:44:49,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-18 02:44:49,757 INFO L87 Difference]: Start difference. First operand 1334 states and 1736 transitions. Second operand has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 02:44:50,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:50,336 INFO L93 Difference]: Finished difference Result 1565 states and 2045 transitions. [2022-03-18 02:44:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 02:44:50,337 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 104 [2022-03-18 02:44:50,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:50,344 INFO L225 Difference]: With dead ends: 1565 [2022-03-18 02:44:50,344 INFO L226 Difference]: Without dead ends: 1556 [2022-03-18 02:44:50,344 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-03-18 02:44:50,345 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 68 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:50,345 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 364 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:44:50,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2022-03-18 02:44:50,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1518. [2022-03-18 02:44:50,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1051 states have (on average 1.2274024738344433) internal successors, (1290), 1078 states have internal predecessors, (1290), 350 states have call successors, (350), 118 states have call predecessors, (350), 116 states have return successors, (345), 321 states have call predecessors, (345), 345 states have call successors, (345) [2022-03-18 02:44:50,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 1985 transitions. [2022-03-18 02:44:50,579 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 1985 transitions. Word has length 104 [2022-03-18 02:44:50,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:50,579 INFO L478 AbstractCegarLoop]: Abstraction has 1518 states and 1985 transitions. [2022-03-18 02:44:50,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 02:44:50,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 1985 transitions. [2022-03-18 02:44:50,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-18 02:44:50,581 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:50,581 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-03-18 02:44:50,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:50,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:50,795 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:50,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:50,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1433350311, now seen corresponding path program 5 times [2022-03-18 02:44:50,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:50,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1138304554] [2022-03-18 02:44:50,796 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:50,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1433350311, now seen corresponding path program 6 times [2022-03-18 02:44:50,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:50,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499706536] [2022-03-18 02:44:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:50,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:50,804 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:50,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601771748] [2022-03-18 02:44:50,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:44:50,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:50,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:50,805 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:50,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-18 02:44:50,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:44:50,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:50,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-18 02:44:50,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 40 proven. 73 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-18 02:44:51,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:51,880 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 66 proven. 47 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-03-18 02:44:51,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:51,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499706536] [2022-03-18 02:44:51,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:51,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601771748] [2022-03-18 02:44:51,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601771748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:51,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:51,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 18 [2022-03-18 02:44:51,881 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:51,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1138304554] [2022-03-18 02:44:51,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1138304554] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:51,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:51,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 02:44:51,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652046903] [2022-03-18 02:44:51,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:51,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 02:44:51,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:51,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 02:44:51,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-18 02:44:51,882 INFO L87 Difference]: Start difference. First operand 1518 states and 1985 transitions. Second operand has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-18 02:44:52,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:52,980 INFO L93 Difference]: Finished difference Result 1833 states and 2418 transitions. [2022-03-18 02:44:52,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 02:44:52,980 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 102 [2022-03-18 02:44:52,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:52,986 INFO L225 Difference]: With dead ends: 1833 [2022-03-18 02:44:52,986 INFO L226 Difference]: Without dead ends: 1831 [2022-03-18 02:44:52,987 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 183 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-03-18 02:44:52,987 INFO L912 BasicCegarLoop]: 92 mSDtfsCounter, 148 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:52,987 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 838 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 02:44:52,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2022-03-18 02:44:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1765. [2022-03-18 02:44:53,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1240 states have (on average 1.2508064516129032) internal successors, (1551), 1274 states have internal predecessors, (1551), 397 states have call successors, (397), 129 states have call predecessors, (397), 127 states have return successors, (392), 361 states have call predecessors, (392), 392 states have call successors, (392) [2022-03-18 02:44:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 2340 transitions. [2022-03-18 02:44:53,269 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 2340 transitions. Word has length 102 [2022-03-18 02:44:53,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:53,270 INFO L478 AbstractCegarLoop]: Abstraction has 1765 states and 2340 transitions. [2022-03-18 02:44:53,270 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-18 02:44:53,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 2340 transitions. [2022-03-18 02:44:53,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-18 02:44:53,271 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:53,272 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:53,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:53,491 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-18 02:44:53,491 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:53,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:53,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2051750892, now seen corresponding path program 7 times [2022-03-18 02:44:53,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:53,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1542290060] [2022-03-18 02:44:53,492 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:53,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2051750892, now seen corresponding path program 8 times [2022-03-18 02:44:53,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:53,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712220676] [2022-03-18 02:44:53,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:53,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:53,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:53,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128347091] [2022-03-18 02:44:53,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:53,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:53,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:53,500 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:53,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-18 02:44:53,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:53,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:53,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 02:44:53,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 116 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 02:44:53,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 36 proven. 52 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-18 02:44:54,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:54,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712220676] [2022-03-18 02:44:54,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:54,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128347091] [2022-03-18 02:44:54,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128347091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:54,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:54,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-18 02:44:54,024 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:54,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1542290060] [2022-03-18 02:44:54,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1542290060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:54,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:54,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 02:44:54,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660606600] [2022-03-18 02:44:54,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:54,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 02:44:54,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:54,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 02:44:54,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-18 02:44:54,026 INFO L87 Difference]: Start difference. First operand 1765 states and 2340 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:54,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:54,547 INFO L93 Difference]: Finished difference Result 2634 states and 3640 transitions. [2022-03-18 02:44:54,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 02:44:54,547 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 103 [2022-03-18 02:44:54,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:54,555 INFO L225 Difference]: With dead ends: 2634 [2022-03-18 02:44:54,555 INFO L226 Difference]: Without dead ends: 1870 [2022-03-18 02:44:54,558 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=465, Invalid=657, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 02:44:54,558 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 232 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:54,558 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 339 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:44:54,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2022-03-18 02:44:54,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1825. [2022-03-18 02:44:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1298 states have (on average 1.2496147919876734) internal successors, (1622), 1319 states have internal predecessors, (1622), 398 states have call successors, (398), 130 states have call predecessors, (398), 128 states have return successors, (393), 375 states have call predecessors, (393), 393 states have call successors, (393) [2022-03-18 02:44:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2413 transitions. [2022-03-18 02:44:54,867 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2413 transitions. Word has length 103 [2022-03-18 02:44:54,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:54,867 INFO L478 AbstractCegarLoop]: Abstraction has 1825 states and 2413 transitions. [2022-03-18 02:44:54,867 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2413 transitions. [2022-03-18 02:44:54,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 02:44:54,868 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:54,869 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:54,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:55,090 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-18 02:44:55,091 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:55,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:55,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1865093808, now seen corresponding path program 7 times [2022-03-18 02:44:55,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:55,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1267125998] [2022-03-18 02:44:55,091 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:55,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1865093808, now seen corresponding path program 8 times [2022-03-18 02:44:55,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:55,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649268460] [2022-03-18 02:44:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:55,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:55,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:55,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82020697] [2022-03-18 02:44:55,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:55,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:55,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:55,099 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:55,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-18 02:44:55,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:55,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:55,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 02:44:55,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 27 proven. 133 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 02:44:55,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 27 proven. 69 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-18 02:44:55,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:55,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649268460] [2022-03-18 02:44:55,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:55,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82020697] [2022-03-18 02:44:55,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82020697] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:55,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:55,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-18 02:44:55,760 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:55,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1267125998] [2022-03-18 02:44:55,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1267125998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:55,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:55,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 02:44:55,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747623222] [2022-03-18 02:44:55,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:55,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 02:44:55,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:55,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 02:44:55,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-18 02:44:55,762 INFO L87 Difference]: Start difference. First operand 1825 states and 2413 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:56,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:44:56,364 INFO L93 Difference]: Finished difference Result 2758 states and 3762 transitions. [2022-03-18 02:44:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 02:44:56,364 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 104 [2022-03-18 02:44:56,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:44:56,374 INFO L225 Difference]: With dead ends: 2758 [2022-03-18 02:44:56,375 INFO L226 Difference]: Without dead ends: 2189 [2022-03-18 02:44:56,377 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=556, Invalid=776, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 02:44:56,378 INFO L912 BasicCegarLoop]: 77 mSDtfsCounter, 271 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:44:56,378 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 352 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:44:56,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2022-03-18 02:44:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2064. [2022-03-18 02:44:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 1436 states have (on average 1.2395543175487465) internal successors, (1780), 1459 states have internal predecessors, (1780), 474 states have call successors, (474), 155 states have call predecessors, (474), 153 states have return successors, (468), 449 states have call predecessors, (468), 468 states have call successors, (468) [2022-03-18 02:44:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 2722 transitions. [2022-03-18 02:44:56,791 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 2722 transitions. Word has length 104 [2022-03-18 02:44:56,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:44:56,792 INFO L478 AbstractCegarLoop]: Abstraction has 2064 states and 2722 transitions. [2022-03-18 02:44:56,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:44:56,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 2722 transitions. [2022-03-18 02:44:56,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-18 02:44:56,793 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:44:56,794 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:44:56,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-18 02:44:57,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-18 02:44:57,004 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:44:57,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:44:57,004 INFO L85 PathProgramCache]: Analyzing trace with hash 911562927, now seen corresponding path program 7 times [2022-03-18 02:44:57,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:57,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [329584528] [2022-03-18 02:44:57,005 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:44:57,005 INFO L85 PathProgramCache]: Analyzing trace with hash 911562927, now seen corresponding path program 8 times [2022-03-18 02:44:57,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:44:57,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540940975] [2022-03-18 02:44:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:44:57,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:44:57,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:44:57,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485249484] [2022-03-18 02:44:57,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:44:57,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:44:57,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:44:57,012 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:44:57,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-18 02:44:57,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:44:57,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:44:57,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-18 02:44:57,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:44:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 93 proven. 46 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-03-18 02:44:58,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:44:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 117 proven. 12 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-18 02:44:59,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:44:59,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540940975] [2022-03-18 02:44:59,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:44:59,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485249484] [2022-03-18 02:44:59,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485249484] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:44:59,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:44:59,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-03-18 02:44:59,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:44:59,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [329584528] [2022-03-18 02:44:59,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [329584528] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:44:59,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:44:59,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:44:59,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117031492] [2022-03-18 02:44:59,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:44:59,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:44:59,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:44:59,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:44:59,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-03-18 02:44:59,421 INFO L87 Difference]: Start difference. First operand 2064 states and 2722 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:45:00,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:45:00,267 INFO L93 Difference]: Finished difference Result 2130 states and 2803 transitions. [2022-03-18 02:45:00,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 02:45:00,267 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 108 [2022-03-18 02:45:00,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:45:00,274 INFO L225 Difference]: With dead ends: 2130 [2022-03-18 02:45:00,274 INFO L226 Difference]: Without dead ends: 2125 [2022-03-18 02:45:00,275 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-03-18 02:45:00,275 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 64 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:45:00,275 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 743 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:45:00,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2022-03-18 02:45:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 2071. [2022-03-18 02:45:00,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 1442 states have (on average 1.2371705963938973) internal successors, (1784), 1466 states have internal predecessors, (1784), 471 states have call successors, (471), 158 states have call predecessors, (471), 157 states have return successors, (466), 446 states have call predecessors, (466), 466 states have call successors, (466) [2022-03-18 02:45:00,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 2721 transitions. [2022-03-18 02:45:00,657 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 2721 transitions. Word has length 108 [2022-03-18 02:45:00,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:45:00,657 INFO L478 AbstractCegarLoop]: Abstraction has 2071 states and 2721 transitions. [2022-03-18 02:45:00,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:45:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 2721 transitions. [2022-03-18 02:45:00,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-18 02:45:00,659 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:45:00,659 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-03-18 02:45:00,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-18 02:45:00,882 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-18 02:45:00,882 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:45:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:45:00,882 INFO L85 PathProgramCache]: Analyzing trace with hash -373909618, now seen corresponding path program 9 times [2022-03-18 02:45:00,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:00,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1082040140] [2022-03-18 02:45:00,883 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:45:00,883 INFO L85 PathProgramCache]: Analyzing trace with hash -373909618, now seen corresponding path program 10 times [2022-03-18 02:45:00,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:45:00,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454496227] [2022-03-18 02:45:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:45:00,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:45:00,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:45:00,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395828664] [2022-03-18 02:45:00,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:45:00,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:00,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:45:00,892 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:45:00,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-18 02:45:00,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:45:00,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:45:00,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-18 02:45:00,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:45:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 84 proven. 64 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 02:45:02,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:45:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 97 proven. 45 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-18 02:45:07,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:45:07,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454496227] [2022-03-18 02:45:07,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:45:07,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395828664] [2022-03-18 02:45:07,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395828664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:45:07,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:45:07,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 34 [2022-03-18 02:45:07,278 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:45:07,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1082040140] [2022-03-18 02:45:07,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1082040140] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:45:07,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:45:07,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 02:45:07,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961444288] [2022-03-18 02:45:07,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:45:07,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 02:45:07,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:07,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 02:45:07,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 02:45:07,279 INFO L87 Difference]: Start difference. First operand 2071 states and 2721 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-18 02:45:09,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:45:09,058 INFO L93 Difference]: Finished difference Result 2221 states and 2903 transitions. [2022-03-18 02:45:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 02:45:09,058 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 111 [2022-03-18 02:45:09,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:45:09,064 INFO L225 Difference]: With dead ends: 2221 [2022-03-18 02:45:09,065 INFO L226 Difference]: Without dead ends: 2218 [2022-03-18 02:45:09,065 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 02:45:09,066 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 122 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 02:45:09,066 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 1176 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 02:45:09,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2022-03-18 02:45:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2137. [2022-03-18 02:45:09,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 1487 states have (on average 1.2313382649630127) internal successors, (1831), 1511 states have internal predecessors, (1831), 479 states have call successors, (479), 171 states have call predecessors, (479), 170 states have return successors, (474), 454 states have call predecessors, (474), 474 states have call successors, (474) [2022-03-18 02:45:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 2784 transitions. [2022-03-18 02:45:09,443 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 2784 transitions. Word has length 111 [2022-03-18 02:45:09,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:45:09,443 INFO L478 AbstractCegarLoop]: Abstraction has 2137 states and 2784 transitions. [2022-03-18 02:45:09,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-18 02:45:09,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 2784 transitions. [2022-03-18 02:45:09,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-18 02:45:09,445 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:45:09,445 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:45:09,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-18 02:45:09,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:09,667 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:45:09,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:45:09,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1182187798, now seen corresponding path program 7 times [2022-03-18 02:45:09,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:09,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [179314502] [2022-03-18 02:45:09,668 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:45:09,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1182187798, now seen corresponding path program 8 times [2022-03-18 02:45:09,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:45:09,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764469615] [2022-03-18 02:45:09,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:45:09,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:45:09,676 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:45:09,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162088559] [2022-03-18 02:45:09,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:45:09,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:09,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:45:09,677 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:45:09,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-18 02:45:09,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:45:09,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:45:09,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-18 02:45:09,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:45:11,477 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:11,479 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 47 proven. 113 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 02:45:11,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:45:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 102 proven. 21 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-03-18 02:45:12,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:45:12,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764469615] [2022-03-18 02:45:12,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:45:12,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162088559] [2022-03-18 02:45:12,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162088559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:45:12,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:45:12,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 28 [2022-03-18 02:45:12,495 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:45:12,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [179314502] [2022-03-18 02:45:12,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [179314502] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:45:12,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:45:12,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 02:45:12,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970303147] [2022-03-18 02:45:12,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:45:12,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 02:45:12,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:12,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 02:45:12,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-03-18 02:45:12,497 INFO L87 Difference]: Start difference. First operand 2137 states and 2784 transitions. Second operand has 21 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-18 02:45:15,197 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:45:16,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:45:16,213 INFO L93 Difference]: Finished difference Result 2272 states and 2960 transitions. [2022-03-18 02:45:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 02:45:16,214 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) Word has length 109 [2022-03-18 02:45:16,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:45:16,223 INFO L225 Difference]: With dead ends: 2272 [2022-03-18 02:45:16,223 INFO L226 Difference]: Without dead ends: 2270 [2022-03-18 02:45:16,224 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 02:45:16,225 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 111 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:45:16,225 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 1321 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1328 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-03-18 02:45:16,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2022-03-18 02:45:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2212. [2022-03-18 02:45:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2212 states, 1537 states have (on average 1.2335718932986337) internal successors, (1896), 1562 states have internal predecessors, (1896), 497 states have call successors, (497), 178 states have call predecessors, (497), 177 states have return successors, (492), 471 states have call predecessors, (492), 492 states have call successors, (492) [2022-03-18 02:45:16,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2885 transitions. [2022-03-18 02:45:16,625 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2885 transitions. Word has length 109 [2022-03-18 02:45:16,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:45:16,625 INFO L478 AbstractCegarLoop]: Abstraction has 2212 states and 2885 transitions. [2022-03-18 02:45:16,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-03-18 02:45:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2885 transitions. [2022-03-18 02:45:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-18 02:45:16,627 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:45:16,628 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:45:16,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-18 02:45:16,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:16,831 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:45:16,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:45:16,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1720519159, now seen corresponding path program 9 times [2022-03-18 02:45:16,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:16,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [512476605] [2022-03-18 02:45:16,832 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:45:16,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1720519159, now seen corresponding path program 10 times [2022-03-18 02:45:16,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:45:16,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690071445] [2022-03-18 02:45:16,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:45:16,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:45:16,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:45:16,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734582919] [2022-03-18 02:45:16,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:45:16,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:16,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:45:16,839 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:45:16,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-18 02:45:16,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:45:16,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:45:16,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 02:45:16,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:45:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 41 proven. 142 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 02:45:17,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:45:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 41 proven. 78 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-18 02:45:17,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:45:17,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690071445] [2022-03-18 02:45:17,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:45:17,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734582919] [2022-03-18 02:45:17,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734582919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:45:17,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:45:17,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-18 02:45:17,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:45:17,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [512476605] [2022-03-18 02:45:17,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [512476605] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:45:17,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:45:17,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:45:17,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375706161] [2022-03-18 02:45:17,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:45:17,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:45:17,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:17,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:45:17,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-18 02:45:17,500 INFO L87 Difference]: Start difference. First operand 2212 states and 2885 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:45:18,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:45:18,194 INFO L93 Difference]: Finished difference Result 3498 states and 4737 transitions. [2022-03-18 02:45:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 02:45:18,194 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 110 [2022-03-18 02:45:18,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:45:18,200 INFO L225 Difference]: With dead ends: 3498 [2022-03-18 02:45:18,200 INFO L226 Difference]: Without dead ends: 2692 [2022-03-18 02:45:18,202 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=653, Invalid=907, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 02:45:18,203 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 284 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:45:18,203 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 394 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:45:18,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2022-03-18 02:45:18,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2630. [2022-03-18 02:45:18,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 1836 states have (on average 1.2167755991285403) internal successors, (2234), 1862 states have internal predecessors, (2234), 587 states have call successors, (587), 207 states have call predecessors, (587), 206 states have return successors, (581), 560 states have call predecessors, (581), 581 states have call successors, (581) [2022-03-18 02:45:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 3402 transitions. [2022-03-18 02:45:18,636 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 3402 transitions. Word has length 110 [2022-03-18 02:45:18,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:45:18,636 INFO L478 AbstractCegarLoop]: Abstraction has 2630 states and 3402 transitions. [2022-03-18 02:45:18,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 5 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 02:45:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 3402 transitions. [2022-03-18 02:45:18,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-18 02:45:18,638 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:45:18,638 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-03-18 02:45:18,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-18 02:45:18,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-18 02:45:18,859 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:45:18,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:45:18,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1581009068, now seen corresponding path program 11 times [2022-03-18 02:45:18,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:18,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [136366406] [2022-03-18 02:45:18,860 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:45:18,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1581009068, now seen corresponding path program 12 times [2022-03-18 02:45:18,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:45:18,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371829599] [2022-03-18 02:45:18,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:45:18,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:45:18,867 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:45:18,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835055007] [2022-03-18 02:45:18,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:45:18,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:18,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:45:18,870 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:45:18,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-18 02:45:18,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-18 02:45:18,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:45:18,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-18 02:45:18,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:45:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 89 proven. 81 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-18 02:45:20,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:45:25,589 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:25,596 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 89 proven. 81 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-18 02:45:31,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:45:31,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371829599] [2022-03-18 02:45:31,425 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:45:31,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835055007] [2022-03-18 02:45:31,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835055007] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:45:31,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:45:31,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 37 [2022-03-18 02:45:31,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:45:31,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [136366406] [2022-03-18 02:45:31,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [136366406] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:45:31,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:45:31,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 02:45:31,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486451498] [2022-03-18 02:45:31,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:45:31,426 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 02:45:31,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:31,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 02:45:31,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 02:45:31,427 INFO L87 Difference]: Start difference. First operand 2630 states and 3402 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-18 02:45:32,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:45:32,874 INFO L93 Difference]: Finished difference Result 2778 states and 3585 transitions. [2022-03-18 02:45:32,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 02:45:32,875 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 115 [2022-03-18 02:45:32,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:45:32,883 INFO L225 Difference]: With dead ends: 2778 [2022-03-18 02:45:32,883 INFO L226 Difference]: Without dead ends: 2771 [2022-03-18 02:45:32,885 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=301, Invalid=1505, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 02:45:32,885 INFO L912 BasicCegarLoop]: 80 mSDtfsCounter, 95 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 02:45:32,885 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 942 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 02:45:32,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2022-03-18 02:45:33,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 2709. [2022-03-18 02:45:33,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 1888 states have (on average 1.2139830508474576) internal successors, (2292), 1913 states have internal predecessors, (2292), 604 states have call successors, (604), 217 states have call predecessors, (604), 216 states have return successors, (598), 578 states have call predecessors, (598), 598 states have call successors, (598) [2022-03-18 02:45:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 3494 transitions. [2022-03-18 02:45:33,419 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 3494 transitions. Word has length 115 [2022-03-18 02:45:33,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:45:33,419 INFO L478 AbstractCegarLoop]: Abstraction has 2709 states and 3494 transitions. [2022-03-18 02:45:33,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-03-18 02:45:33,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 3494 transitions. [2022-03-18 02:45:33,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-18 02:45:33,420 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:45:33,420 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2022-03-18 02:45:33,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-18 02:45:33,621 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-18 02:45:33,621 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:45:33,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:45:33,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1307868536, now seen corresponding path program 13 times [2022-03-18 02:45:33,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:33,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [977468317] [2022-03-18 02:45:33,622 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:45:33,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1307868536, now seen corresponding path program 14 times [2022-03-18 02:45:33,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:45:33,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566317933] [2022-03-18 02:45:33,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:45:33,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:45:33,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:45:33,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349214879] [2022-03-18 02:45:33,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:45:33,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:33,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:45:33,631 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:45:33,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-18 02:45:33,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:45:33,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:45:33,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-18 02:45:33,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:45:34,197 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 97 proven. 85 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-03-18 02:45:35,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:45:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 130 proven. 19 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-03-18 02:45:44,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:45:44,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566317933] [2022-03-18 02:45:44,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:45:44,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349214879] [2022-03-18 02:45:44,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349214879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:45:44,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:45:44,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16] total 36 [2022-03-18 02:45:44,078 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:45:44,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [977468317] [2022-03-18 02:45:44,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [977468317] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:45:44,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:45:44,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 02:45:44,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951358661] [2022-03-18 02:45:44,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:45:44,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 02:45:44,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:44,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 02:45:44,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 02:45:44,079 INFO L87 Difference]: Start difference. First operand 2709 states and 3494 transitions. Second operand has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-18 02:45:46,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:45:46,255 INFO L93 Difference]: Finished difference Result 2979 states and 3842 transitions. [2022-03-18 02:45:46,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 02:45:46,256 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 115 [2022-03-18 02:45:46,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:45:46,263 INFO L225 Difference]: With dead ends: 2979 [2022-03-18 02:45:46,263 INFO L226 Difference]: Without dead ends: 2976 [2022-03-18 02:45:46,264 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 192 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=303, Invalid=1677, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 02:45:46,265 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 129 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:45:46,265 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 1214 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 02:45:46,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2022-03-18 02:45:46,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2912. [2022-03-18 02:45:46,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2020 states have (on average 1.2103960396039604) internal successors, (2445), 2046 states have internal predecessors, (2445), 654 states have call successors, (654), 238 states have call predecessors, (654), 237 states have return successors, (648), 627 states have call predecessors, (648), 648 states have call successors, (648) [2022-03-18 02:45:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 3747 transitions. [2022-03-18 02:45:46,808 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 3747 transitions. Word has length 115 [2022-03-18 02:45:46,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:45:46,808 INFO L478 AbstractCegarLoop]: Abstraction has 2912 states and 3747 transitions. [2022-03-18 02:45:46,808 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 21 states have internal predecessors, (53), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-03-18 02:45:46,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 3747 transitions. [2022-03-18 02:45:46,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-18 02:45:46,810 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:45:46,810 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:45:46,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-18 02:45:47,014 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-18 02:45:47,014 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:45:47,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:45:47,015 INFO L85 PathProgramCache]: Analyzing trace with hash -349274797, now seen corresponding path program 3 times [2022-03-18 02:45:47,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:47,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1616384187] [2022-03-18 02:45:47,015 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:45:47,015 INFO L85 PathProgramCache]: Analyzing trace with hash -349274797, now seen corresponding path program 4 times [2022-03-18 02:45:47,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:45:47,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4467997] [2022-03-18 02:45:47,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:45:47,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:45:47,022 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:45:47,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146246034] [2022-03-18 02:45:47,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:45:47,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:47,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:45:47,023 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:45:47,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-18 02:45:47,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:45:47,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:45:47,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 02:45:47,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:45:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 24 proven. 262 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-18 02:45:47,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:45:47,702 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 24 proven. 70 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-18 02:45:47,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:45:47,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4467997] [2022-03-18 02:45:47,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:45:47,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146246034] [2022-03-18 02:45:47,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146246034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:45:47,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:45:47,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-18 02:45:47,702 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:45:47,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1616384187] [2022-03-18 02:45:47,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1616384187] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:45:47,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:45:47,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 02:45:47,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768997964] [2022-03-18 02:45:47,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:45:47,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 02:45:47,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:47,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 02:45:47,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-18 02:45:47,703 INFO L87 Difference]: Start difference. First operand 2912 states and 3747 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:45:48,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:45:48,437 INFO L93 Difference]: Finished difference Result 2925 states and 3756 transitions. [2022-03-18 02:45:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 02:45:48,438 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 121 [2022-03-18 02:45:48,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:45:48,445 INFO L225 Difference]: With dead ends: 2925 [2022-03-18 02:45:48,445 INFO L226 Difference]: Without dead ends: 2918 [2022-03-18 02:45:48,446 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=774, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 02:45:48,447 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 262 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:45:48,447 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 347 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:45:48,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2022-03-18 02:45:49,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 2912. [2022-03-18 02:45:49,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2020 states have (on average 1.2074257425742574) internal successors, (2439), 2046 states have internal predecessors, (2439), 654 states have call successors, (654), 238 states have call predecessors, (654), 237 states have return successors, (648), 627 states have call predecessors, (648), 648 states have call successors, (648) [2022-03-18 02:45:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 3741 transitions. [2022-03-18 02:45:49,111 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 3741 transitions. Word has length 121 [2022-03-18 02:45:49,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:45:49,111 INFO L478 AbstractCegarLoop]: Abstraction has 2912 states and 3741 transitions. [2022-03-18 02:45:49,111 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:45:49,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 3741 transitions. [2022-03-18 02:45:49,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-18 02:45:49,113 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:45:49,113 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:45:49,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-18 02:45:49,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:49,327 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:45:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:45:49,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2042365659, now seen corresponding path program 15 times [2022-03-18 02:45:49,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:49,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1672771292] [2022-03-18 02:45:49,328 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:45:49,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2042365659, now seen corresponding path program 16 times [2022-03-18 02:45:49,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:45:49,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581197112] [2022-03-18 02:45:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:45:49,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:45:49,333 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:45:49,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236690892] [2022-03-18 02:45:49,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:45:49,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:45:49,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:45:49,335 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:45:49,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-18 02:45:49,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:45:49,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:45:49,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-18 02:45:49,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:45:53,419 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 86 proven. 110 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-18 02:45:54,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:45:55,525 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:45:57,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:45:57,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581197112] [2022-03-18 02:45:57,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:45:57,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236690892] [2022-03-18 02:45:57,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236690892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:45:57,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:45:57,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-18 02:45:57,608 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:45:57,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1672771292] [2022-03-18 02:45:57,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1672771292] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:45:57,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:45:57,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-18 02:45:57,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521707062] [2022-03-18 02:45:57,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:45:57,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 02:45:57,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:45:57,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 02:45:57,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 02:45:57,609 INFO L87 Difference]: Start difference. First operand 2912 states and 3741 transitions. Second operand has 28 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 9 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-18 02:46:04,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:46:04,824 INFO L93 Difference]: Finished difference Result 3037 states and 3905 transitions. [2022-03-18 02:46:04,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 02:46:04,825 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 9 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 122 [2022-03-18 02:46:04,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:46:04,833 INFO L225 Difference]: With dead ends: 3037 [2022-03-18 02:46:04,833 INFO L226 Difference]: Without dead ends: 3034 [2022-03-18 02:46:04,834 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=273, Invalid=1889, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 02:46:04,834 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 162 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-18 02:46:04,835 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 1493 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-18 02:46:04,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2022-03-18 02:46:05,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 2998. [2022-03-18 02:46:05,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2998 states, 2077 states have (on average 1.2103996148290803) internal successors, (2514), 2104 states have internal predecessors, (2514), 676 states have call successors, (676), 245 states have call predecessors, (676), 244 states have return successors, (670), 648 states have call predecessors, (670), 670 states have call successors, (670) [2022-03-18 02:46:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 3860 transitions. [2022-03-18 02:46:05,521 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 3860 transitions. Word has length 122 [2022-03-18 02:46:05,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:46:05,521 INFO L478 AbstractCegarLoop]: Abstraction has 2998 states and 3860 transitions. [2022-03-18 02:46:05,522 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.4) internal successors, (60), 23 states have internal predecessors, (60), 9 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-03-18 02:46:05,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 3860 transitions. [2022-03-18 02:46:05,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-18 02:46:05,525 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:46:05,525 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-03-18 02:46:05,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-18 02:46:05,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-18 02:46:05,743 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:46:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:46:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash -598915707, now seen corresponding path program 9 times [2022-03-18 02:46:05,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:46:05,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [919654504] [2022-03-18 02:46:05,744 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:46:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash -598915707, now seen corresponding path program 10 times [2022-03-18 02:46:05,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:46:05,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749202170] [2022-03-18 02:46:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:46:05,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:46:05,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:46:05,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904918635] [2022-03-18 02:46:05,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:46:05,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:46:05,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:46:05,751 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:46:05,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-18 02:46:05,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:46:05,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:46:05,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 02:46:05,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:46:06,067 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 24 proven. 279 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-18 02:46:06,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:46:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 24 proven. 87 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-18 02:46:06,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:46:06,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749202170] [2022-03-18 02:46:06,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:46:06,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904918635] [2022-03-18 02:46:06,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904918635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:46:06,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:46:06,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-18 02:46:06,423 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:46:06,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [919654504] [2022-03-18 02:46:06,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [919654504] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:46:06,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:46:06,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:46:06,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151224938] [2022-03-18 02:46:06,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:46:06,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:46:06,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:46:06,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:46:06,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-18 02:46:06,424 INFO L87 Difference]: Start difference. First operand 2998 states and 3860 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:46:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:46:07,251 INFO L93 Difference]: Finished difference Result 3075 states and 3938 transitions. [2022-03-18 02:46:07,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 02:46:07,252 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 125 [2022-03-18 02:46:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:46:07,258 INFO L225 Difference]: With dead ends: 3075 [2022-03-18 02:46:07,258 INFO L226 Difference]: Without dead ends: 3068 [2022-03-18 02:46:07,259 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=656, Invalid=904, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 02:46:07,259 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 338 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:46:07,260 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 392 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:46:07,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3068 states. [2022-03-18 02:46:07,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3068 to 3004. [2022-03-18 02:46:07,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 2083 states have (on average 1.2097935669707154) internal successors, (2520), 2110 states have internal predecessors, (2520), 676 states have call successors, (676), 245 states have call predecessors, (676), 244 states have return successors, (670), 648 states have call predecessors, (670), 670 states have call successors, (670) [2022-03-18 02:46:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 3866 transitions. [2022-03-18 02:46:07,824 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 3866 transitions. Word has length 125 [2022-03-18 02:46:07,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:46:07,825 INFO L478 AbstractCegarLoop]: Abstraction has 3004 states and 3866 transitions. [2022-03-18 02:46:07,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:46:07,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 3866 transitions. [2022-03-18 02:46:07,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-18 02:46:07,827 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:46:07,828 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:46:07,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-18 02:46:08,045 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-18 02:46:08,045 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:46:08,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:46:08,045 INFO L85 PathProgramCache]: Analyzing trace with hash -343429313, now seen corresponding path program 3 times [2022-03-18 02:46:08,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:46:08,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1978943824] [2022-03-18 02:46:08,046 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:46:08,046 INFO L85 PathProgramCache]: Analyzing trace with hash -343429313, now seen corresponding path program 4 times [2022-03-18 02:46:08,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:46:08,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027558104] [2022-03-18 02:46:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:46:08,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:46:08,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:46:08,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993712225] [2022-03-18 02:46:08,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:46:08,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:46:08,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:46:08,055 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:46:08,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-18 02:46:08,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:46:08,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:46:08,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 02:46:08,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:46:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 35 proven. 275 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-18 02:46:08,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:46:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 35 proven. 83 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-18 02:46:08,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:46:08,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027558104] [2022-03-18 02:46:08,826 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:46:08,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993712225] [2022-03-18 02:46:08,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993712225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:46:08,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:46:08,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-18 02:46:08,826 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:46:08,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1978943824] [2022-03-18 02:46:08,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1978943824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:46:08,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:46:08,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 02:46:08,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135751269] [2022-03-18 02:46:08,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:46:08,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 02:46:08,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:46:08,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 02:46:08,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-18 02:46:08,827 INFO L87 Difference]: Start difference. First operand 3004 states and 3866 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:46:09,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:46:09,661 INFO L93 Difference]: Finished difference Result 3658 states and 4844 transitions. [2022-03-18 02:46:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 02:46:09,662 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 127 [2022-03-18 02:46:09,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:46:09,668 INFO L225 Difference]: With dead ends: 3658 [2022-03-18 02:46:09,668 INFO L226 Difference]: Without dead ends: 3089 [2022-03-18 02:46:09,670 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=654, Invalid=906, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 02:46:09,671 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 284 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:46:09,671 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 408 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:46:09,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2022-03-18 02:46:10,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 3069. [2022-03-18 02:46:10,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3069 states, 2148 states have (on average 1.202513966480447) internal successors, (2583), 2175 states have internal predecessors, (2583), 676 states have call successors, (676), 245 states have call predecessors, (676), 244 states have return successors, (670), 648 states have call predecessors, (670), 670 states have call successors, (670) [2022-03-18 02:46:10,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3069 states to 3069 states and 3929 transitions. [2022-03-18 02:46:10,247 INFO L78 Accepts]: Start accepts. Automaton has 3069 states and 3929 transitions. Word has length 127 [2022-03-18 02:46:10,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:46:10,247 INFO L478 AbstractCegarLoop]: Abstraction has 3069 states and 3929 transitions. [2022-03-18 02:46:10,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:46:10,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3069 states and 3929 transitions. [2022-03-18 02:46:10,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-18 02:46:10,250 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:46:10,250 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2022-03-18 02:46:10,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-18 02:46:10,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-18 02:46:10,463 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:46:10,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:46:10,464 INFO L85 PathProgramCache]: Analyzing trace with hash 410495670, now seen corresponding path program 17 times [2022-03-18 02:46:10,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:46:10,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [792895205] [2022-03-18 02:46:10,464 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:46:10,464 INFO L85 PathProgramCache]: Analyzing trace with hash 410495670, now seen corresponding path program 18 times [2022-03-18 02:46:10,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:46:10,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770823059] [2022-03-18 02:46:10,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:46:10,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:46:10,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:46:10,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429514308] [2022-03-18 02:46:10,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:46:10,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:46:10,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:46:10,475 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:46:10,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-18 02:46:10,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-18 02:46:10,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:46:10,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 02:46:10,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:46:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 250 proven. 21 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-03-18 02:46:10,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:46:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 66 proven. 21 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-18 02:46:11,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:46:11,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770823059] [2022-03-18 02:46:11,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:46:11,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429514308] [2022-03-18 02:46:11,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429514308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:46:11,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:46:11,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-18 02:46:11,038 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:46:11,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [792895205] [2022-03-18 02:46:11,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [792895205] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:46:11,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:46:11,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 02:46:11,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582170049] [2022-03-18 02:46:11,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:46:11,038 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 02:46:11,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:46:11,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 02:46:11,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 02:46:11,039 INFO L87 Difference]: Start difference. First operand 3069 states and 3929 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-18 02:46:12,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:46:12,025 INFO L93 Difference]: Finished difference Result 4973 states and 6641 transitions. [2022-03-18 02:46:12,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 02:46:12,026 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 131 [2022-03-18 02:46:12,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:46:12,035 INFO L225 Difference]: With dead ends: 4973 [2022-03-18 02:46:12,035 INFO L226 Difference]: Without dead ends: 3549 [2022-03-18 02:46:12,039 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 255 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-18 02:46:12,039 INFO L912 BasicCegarLoop]: 77 mSDtfsCounter, 26 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:46:12,039 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 278 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 02:46:12,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2022-03-18 02:46:12,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 3240. [2022-03-18 02:46:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3240 states, 2249 states have (on average 1.2249888839484215) internal successors, (2755), 2282 states have internal predecessors, (2755), 770 states have call successors, (770), 222 states have call predecessors, (770), 220 states have return successors, (764), 735 states have call predecessors, (764), 764 states have call successors, (764) [2022-03-18 02:46:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 4289 transitions. [2022-03-18 02:46:12,895 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 4289 transitions. Word has length 131 [2022-03-18 02:46:12,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:46:12,896 INFO L478 AbstractCegarLoop]: Abstraction has 3240 states and 4289 transitions. [2022-03-18 02:46:12,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-03-18 02:46:12,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 4289 transitions. [2022-03-18 02:46:12,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-18 02:46:12,899 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:46:12,899 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1] [2022-03-18 02:46:12,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-18 02:46:13,114 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-03-18 02:46:13,115 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:46:13,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:46:13,115 INFO L85 PathProgramCache]: Analyzing trace with hash 419861042, now seen corresponding path program 19 times [2022-03-18 02:46:13,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:46:13,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1439007789] [2022-03-18 02:46:13,116 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:46:13,116 INFO L85 PathProgramCache]: Analyzing trace with hash 419861042, now seen corresponding path program 20 times [2022-03-18 02:46:13,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:46:13,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43121798] [2022-03-18 02:46:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:46:13,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:46:13,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:46:13,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755131725] [2022-03-18 02:46:13,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:46:13,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:46:13,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:46:13,124 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:46:13,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-18 02:46:13,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:46:13,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:46:13,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-18 02:46:13,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:46:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 127 proven. 107 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-03-18 02:46:17,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:46:20,888 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:46:20,890 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:46:52,993 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse3 (div (+ c_main_~b~0 (* (- 1) c_main_~c~0)) (- 4)))) (let ((.cse0 (div .cse3 c_main_~b~0))) (let ((.cse7 (* .cse0 4))) (let ((.cse4 (* c_main_~q~0 c_main_~x~0)) (.cse6 (+ .cse7 c_main_~k~0)) (.cse5 (* c_main_~s~0 c_main_~y~0)) (.cse1 (* c_main_~p~0 c_main_~x~0)) (.cse2 (* c_main_~r~0 c_main_~y~0))) (or (not (= (mod (+ (* 3 c_main_~c~0) c_main_~b~0) 4) 0)) (not (= (* .cse0 c_main_~b~0 2) (* 2 c_main_~v~0))) (<= c_main_~c~0 (* (* .cse0 c_main_~b~0) 4)) (not (= (+ .cse1 .cse2) c_main_~a~0)) (= c_main_~b~0 0) (not (= (mod .cse3 c_main_~b~0) 0)) (not (= c_main_~b~0 (+ .cse4 .cse5))) (not (= (+ (* .cse6 c_main_~b~0) (* (- 1) (* c_main_~b~0 .cse7)) c_main_~c~0) c_main_~a~0)) (= (+ (* .cse4 2) (* .cse6 c_main_~s~0 c_main_~y~0) (* .cse6 c_main_~q~0 c_main_~x~0) (* 2 .cse5)) (+ c_main_~b~0 .cse1 .cse2))))))) is different from true [2022-03-18 02:48:35,619 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse3 (div (+ c_main_~b~0 (* (- 1) c_main_~c~0)) (- 4)))) (let ((.cse8 (div .cse3 c_main_~b~0))) (let ((.cse7 (* .cse8 4))) (let ((.cse0 (* .cse8 c_main_~b~0)) (.cse4 (* c_main_~q~0 c_main_~x~0)) (.cse6 (+ .cse7 c_main_~k~0)) (.cse5 (* c_main_~s~0 c_main_~y~0)) (.cse1 (* c_main_~p~0 c_main_~x~0)) (.cse2 (* c_main_~r~0 c_main_~y~0))) (or (not (= (mod (+ (* 3 c_main_~c~0) c_main_~b~0) 4) 0)) (not (= .cse0 c_main_~b~0)) (<= c_main_~c~0 (* .cse0 4)) (not (= (+ .cse1 .cse2) c_main_~a~0)) (= c_main_~b~0 0) (not (= (mod .cse3 c_main_~b~0) 0)) (not (= c_main_~b~0 (+ .cse4 .cse5))) (not (= (+ (* .cse6 c_main_~b~0) (* (- 1) (* c_main_~b~0 .cse7)) c_main_~c~0) c_main_~a~0)) (= (+ (* .cse4 2) (* .cse6 c_main_~s~0 c_main_~y~0) (* .cse6 c_main_~q~0 c_main_~x~0) (* 2 .cse5)) (+ c_main_~b~0 .cse1 .cse2))))))) is different from true [2022-03-18 02:49:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 127 proven. 86 refuted. 0 times theorem prover too weak. 340 trivial. 18 not checked. [2022-03-18 02:49:23,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:49:23,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43121798] [2022-03-18 02:49:23,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:49:23,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755131725] [2022-03-18 02:49:23,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755131725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:49:23,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:49:23,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 37 [2022-03-18 02:49:23,912 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:49:23,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1439007789] [2022-03-18 02:49:23,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1439007789] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:49:23,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:49:23,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 02:49:23,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830498240] [2022-03-18 02:49:23,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:49:23,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 02:49:23,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:49:23,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 02:49:23,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=985, Unknown=2, NotChecked=134, Total=1332 [2022-03-18 02:49:23,914 INFO L87 Difference]: Start difference. First operand 3240 states and 4289 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 02:49:27,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:49:27,577 INFO L93 Difference]: Finished difference Result 3374 states and 4467 transitions. [2022-03-18 02:49:27,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 02:49:27,578 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 131 [2022-03-18 02:49:27,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:49:27,584 INFO L225 Difference]: With dead ends: 3374 [2022-03-18 02:49:27,584 INFO L226 Difference]: Without dead ends: 3369 [2022-03-18 02:49:27,585 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=271, Invalid=1375, Unknown=2, NotChecked=158, Total=1806 [2022-03-18 02:49:27,585 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 96 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-18 02:49:27,585 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 938 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-18 02:49:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3369 states. [2022-03-18 02:49:28,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3369 to 3351. [2022-03-18 02:49:28,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3351 states, 2316 states have (on average 1.2258203799654577) internal successors, (2839), 2350 states have internal predecessors, (2839), 803 states have call successors, (803), 232 states have call predecessors, (803), 231 states have return successors, (798), 768 states have call predecessors, (798), 798 states have call successors, (798) [2022-03-18 02:49:28,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3351 states to 3351 states and 4440 transitions. [2022-03-18 02:49:28,297 INFO L78 Accepts]: Start accepts. Automaton has 3351 states and 4440 transitions. Word has length 131 [2022-03-18 02:49:28,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:49:28,298 INFO L478 AbstractCegarLoop]: Abstraction has 3351 states and 4440 transitions. [2022-03-18 02:49:28,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 19 states have internal predecessors, (49), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 02:49:28,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3351 states and 4440 transitions. [2022-03-18 02:49:28,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-18 02:49:28,300 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:49:28,300 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:49:28,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-18 02:49:28,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:49:28,515 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:49:28,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:49:28,516 INFO L85 PathProgramCache]: Analyzing trace with hash 233578743, now seen corresponding path program 21 times [2022-03-18 02:49:28,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:49:28,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [423531609] [2022-03-18 02:49:28,516 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:49:28,516 INFO L85 PathProgramCache]: Analyzing trace with hash 233578743, now seen corresponding path program 22 times [2022-03-18 02:49:28,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:49:28,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373920033] [2022-03-18 02:49:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:49:28,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:49:28,522 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:49:28,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487868534] [2022-03-18 02:49:28,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:49:28,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:49:28,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:49:28,524 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:49:28,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-18 02:49:28,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:49:28,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:49:28,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-18 02:49:28,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:49:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 103 proven. 134 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-03-18 02:49:29,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:49:32,728 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 117 proven. 90 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-03-18 02:49:32,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:49:32,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373920033] [2022-03-18 02:49:32,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:49:32,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487868534] [2022-03-18 02:49:32,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487868534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:49:32,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:49:32,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2022-03-18 02:49:32,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:49:32,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [423531609] [2022-03-18 02:49:32,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [423531609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:49:32,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:49:32,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 02:49:32,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066600745] [2022-03-18 02:49:32,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:49:32,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 02:49:32,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:49:32,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 02:49:32,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-03-18 02:49:32,730 INFO L87 Difference]: Start difference. First operand 3351 states and 4440 transitions. Second operand has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 02:49:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:49:35,665 INFO L93 Difference]: Finished difference Result 3487 states and 4616 transitions. [2022-03-18 02:49:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 02:49:35,666 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 134 [2022-03-18 02:49:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:49:35,671 INFO L225 Difference]: With dead ends: 3487 [2022-03-18 02:49:35,671 INFO L226 Difference]: Without dead ends: 3484 [2022-03-18 02:49:35,672 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 02:49:35,672 INFO L912 BasicCegarLoop]: 92 mSDtfsCounter, 92 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 02:49:35,672 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1268 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 02:49:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3484 states. [2022-03-18 02:49:36,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3484 to 3372. [2022-03-18 02:49:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 2333 states have (on average 1.2228889841405914) internal successors, (2853), 2369 states have internal predecessors, (2853), 800 states have call successors, (800), 239 states have call predecessors, (800), 238 states have return successors, (795), 763 states have call predecessors, (795), 795 states have call successors, (795) [2022-03-18 02:49:36,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 4448 transitions. [2022-03-18 02:49:36,361 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 4448 transitions. Word has length 134 [2022-03-18 02:49:36,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:49:36,361 INFO L478 AbstractCegarLoop]: Abstraction has 3372 states and 4448 transitions. [2022-03-18 02:49:36,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 02:49:36,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 4448 transitions. [2022-03-18 02:49:36,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-18 02:49:36,363 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:49:36,363 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1] [2022-03-18 02:49:36,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-18 02:49:36,586 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-18 02:49:36,586 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:49:36,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:49:36,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1399729945, now seen corresponding path program 9 times [2022-03-18 02:49:36,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:49:36,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1789028924] [2022-03-18 02:49:36,587 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:49:36,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1399729945, now seen corresponding path program 10 times [2022-03-18 02:49:36,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:49:36,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319824692] [2022-03-18 02:49:36,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:49:36,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:49:36,593 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:49:36,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940017771] [2022-03-18 02:49:36,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:49:36,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:49:36,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:49:36,595 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:49:36,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-18 02:49:36,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:49:36,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:49:36,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 02:49:36,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:49:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 35 proven. 294 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-18 02:49:36,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:49:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 35 proven. 102 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-18 02:49:37,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:49:37,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319824692] [2022-03-18 02:49:37,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:49:37,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940017771] [2022-03-18 02:49:37,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940017771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:49:37,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:49:37,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-18 02:49:37,368 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:49:37,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1789028924] [2022-03-18 02:49:37,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1789028924] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:49:37,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:49:37,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 02:49:37,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322839984] [2022-03-18 02:49:37,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:49:37,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 02:49:37,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:49:37,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 02:49:37,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-18 02:49:37,369 INFO L87 Difference]: Start difference. First operand 3372 states and 4448 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:49:38,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:49:38,480 INFO L93 Difference]: Finished difference Result 4559 states and 6225 transitions. [2022-03-18 02:49:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 02:49:38,481 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 131 [2022-03-18 02:49:38,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:49:38,487 INFO L225 Difference]: With dead ends: 4559 [2022-03-18 02:49:38,487 INFO L226 Difference]: Without dead ends: 3862 [2022-03-18 02:49:38,489 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=760, Invalid=1046, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 02:49:38,489 INFO L912 BasicCegarLoop]: 93 mSDtfsCounter, 337 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:49:38,489 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 427 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:49:38,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2022-03-18 02:49:39,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 3673. [2022-03-18 02:49:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3673 states, 2456 states have (on average 1.22557003257329) internal successors, (3010), 2499 states have internal predecessors, (3010), 944 states have call successors, (944), 273 states have call predecessors, (944), 272 states have return successors, (938), 900 states have call predecessors, (938), 938 states have call successors, (938) [2022-03-18 02:49:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 4892 transitions. [2022-03-18 02:49:39,253 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 4892 transitions. Word has length 131 [2022-03-18 02:49:39,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:49:39,253 INFO L478 AbstractCegarLoop]: Abstraction has 3673 states and 4892 transitions. [2022-03-18 02:49:39,254 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:49:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 4892 transitions. [2022-03-18 02:49:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-18 02:49:39,255 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:49:39,256 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-03-18 02:49:39,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-18 02:49:39,456 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:49:39,456 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:49:39,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:49:39,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1440640833, now seen corresponding path program 1 times [2022-03-18 02:49:39,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:49:39,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1658805031] [2022-03-18 02:49:39,457 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:49:39,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1440640833, now seen corresponding path program 2 times [2022-03-18 02:49:39,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:49:39,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695627761] [2022-03-18 02:49:39,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:49:39,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:49:39,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:49:39,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735080237] [2022-03-18 02:49:39,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:49:39,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:49:39,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:49:39,464 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:49:39,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-18 02:49:39,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:49:39,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:49:39,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-18 02:49:39,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:49:43,556 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:49:43,560 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:49:43,561 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:49:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 105 proven. 141 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-03-18 02:49:43,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:49:44,745 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 145 proven. 21 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-18 02:49:44,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:49:44,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695627761] [2022-03-18 02:49:44,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:49:44,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735080237] [2022-03-18 02:49:44,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735080237] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:49:44,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:49:44,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 30 [2022-03-18 02:49:44,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:49:44,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1658805031] [2022-03-18 02:49:44,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1658805031] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:49:44,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:49:44,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 02:49:44,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122863349] [2022-03-18 02:49:44,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:49:44,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 02:49:44,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:49:44,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 02:49:44,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-18 02:49:44,747 INFO L87 Difference]: Start difference. First operand 3673 states and 4892 transitions. Second operand has 23 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 10 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-18 02:49:48,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:49:48,232 INFO L93 Difference]: Finished difference Result 3906 states and 5212 transitions. [2022-03-18 02:49:48,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 02:49:48,233 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 10 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 132 [2022-03-18 02:49:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:49:48,240 INFO L225 Difference]: With dead ends: 3906 [2022-03-18 02:49:48,240 INFO L226 Difference]: Without dead ends: 3904 [2022-03-18 02:49:48,240 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 232 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 02:49:48,240 INFO L912 BasicCegarLoop]: 93 mSDtfsCounter, 132 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-18 02:49:48,241 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 1477 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-18 02:49:48,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3904 states. [2022-03-18 02:49:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3904 to 3758. [2022-03-18 02:49:49,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3758 states, 2512 states have (on average 1.2261146496815287) internal successors, (3080), 2556 states have internal predecessors, (3080), 965 states have call successors, (965), 281 states have call predecessors, (965), 280 states have return successors, (959), 920 states have call predecessors, (959), 959 states have call successors, (959) [2022-03-18 02:49:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3758 states to 3758 states and 5004 transitions. [2022-03-18 02:49:49,034 INFO L78 Accepts]: Start accepts. Automaton has 3758 states and 5004 transitions. Word has length 132 [2022-03-18 02:49:49,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:49:49,035 INFO L478 AbstractCegarLoop]: Abstraction has 3758 states and 5004 transitions. [2022-03-18 02:49:49,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 10 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-18 02:49:49,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3758 states and 5004 transitions. [2022-03-18 02:49:49,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-18 02:49:49,037 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:49:49,037 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-03-18 02:49:49,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-18 02:49:49,259 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:49:49,259 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:49:49,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:49:49,260 INFO L85 PathProgramCache]: Analyzing trace with hash 862891816, now seen corresponding path program 11 times [2022-03-18 02:49:49,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:49:49,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1390056274] [2022-03-18 02:49:49,260 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:49:49,260 INFO L85 PathProgramCache]: Analyzing trace with hash 862891816, now seen corresponding path program 12 times [2022-03-18 02:49:49,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:49:49,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516237180] [2022-03-18 02:49:49,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:49:49,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:49:49,265 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:49:49,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830319954] [2022-03-18 02:49:49,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:49:49,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:49:49,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:49:49,267 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:49:49,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-18 02:49:49,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-18 02:49:49,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:49:49,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 02:49:49,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:49:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-18 02:49:49,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:49:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-18 02:49:50,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:49:50,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516237180] [2022-03-18 02:49:50,209 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:49:50,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830319954] [2022-03-18 02:49:50,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830319954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:49:50,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:49:50,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-18 02:49:50,210 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:49:50,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1390056274] [2022-03-18 02:49:50,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1390056274] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:49:50,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:49:50,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 02:49:50,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138160821] [2022-03-18 02:49:50,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:49:50,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 02:49:50,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:49:50,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 02:49:50,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 02:49:50,212 INFO L87 Difference]: Start difference. First operand 3758 states and 5004 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:49:51,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:49:51,595 INFO L93 Difference]: Finished difference Result 4545 states and 6055 transitions. [2022-03-18 02:49:51,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 02:49:51,595 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 132 [2022-03-18 02:49:51,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:49:51,604 INFO L225 Difference]: With dead ends: 4545 [2022-03-18 02:49:51,604 INFO L226 Difference]: Without dead ends: 4538 [2022-03-18 02:49:51,604 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=876, Invalid=1194, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 02:49:51,605 INFO L912 BasicCegarLoop]: 97 mSDtfsCounter, 362 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:49:51,605 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 432 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:49:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2022-03-18 02:49:52,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 4322. [2022-03-18 02:49:52,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 2865 states have (on average 1.2275741710296684) internal successors, (3517), 2953 states have internal predecessors, (3517), 1139 states have call successors, (1139), 318 states have call predecessors, (1139), 317 states have return successors, (1132), 1050 states have call predecessors, (1132), 1132 states have call successors, (1132) [2022-03-18 02:49:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 5788 transitions. [2022-03-18 02:49:52,540 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 5788 transitions. Word has length 132 [2022-03-18 02:49:52,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:49:52,540 INFO L478 AbstractCegarLoop]: Abstraction has 4322 states and 5788 transitions. [2022-03-18 02:49:52,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:49:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 5788 transitions. [2022-03-18 02:49:52,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-18 02:49:52,542 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:49:52,542 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 7, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:49:52,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-18 02:49:52,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:49:52,755 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:49:52,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:49:52,756 INFO L85 PathProgramCache]: Analyzing trace with hash 68245470, now seen corresponding path program 3 times [2022-03-18 02:49:52,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:49:52,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [462683678] [2022-03-18 02:49:52,756 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:49:52,756 INFO L85 PathProgramCache]: Analyzing trace with hash 68245470, now seen corresponding path program 4 times [2022-03-18 02:49:52,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:49:52,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725655612] [2022-03-18 02:49:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:49:52,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:49:52,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:49:52,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120051085] [2022-03-18 02:49:52,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:49:52,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:49:52,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:49:52,763 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:49:52,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-18 02:49:52,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:49:52,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:49:52,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 02:49:52,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:49:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 49 proven. 286 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-18 02:49:53,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:49:53,572 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 49 proven. 94 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-18 02:49:53,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:49:53,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725655612] [2022-03-18 02:49:53,572 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:49:53,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120051085] [2022-03-18 02:49:53,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120051085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:49:53,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:49:53,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-18 02:49:53,573 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:49:53,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [462683678] [2022-03-18 02:49:53,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [462683678] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:49:53,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:49:53,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 02:49:53,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011769564] [2022-03-18 02:49:53,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:49:53,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 02:49:53,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:49:53,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 02:49:53,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-18 02:49:53,574 INFO L87 Difference]: Start difference. First operand 4322 states and 5788 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:49:54,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:49:54,826 INFO L93 Difference]: Finished difference Result 5509 states and 7644 transitions. [2022-03-18 02:49:54,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 02:49:54,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 133 [2022-03-18 02:49:54,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:49:54,834 INFO L225 Difference]: With dead ends: 5509 [2022-03-18 02:49:54,834 INFO L226 Difference]: Without dead ends: 4328 [2022-03-18 02:49:54,837 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1047, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 02:49:54,837 INFO L912 BasicCegarLoop]: 92 mSDtfsCounter, 312 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 02:49:54,837 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 454 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 02:49:54,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2022-03-18 02:49:55,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 4306. [2022-03-18 02:49:55,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4306 states, 2852 states have (on average 1.2100280504908836) internal successors, (3451), 2939 states have internal predecessors, (3451), 1137 states have call successors, (1137), 317 states have call predecessors, (1137), 316 states have return successors, (1130), 1049 states have call predecessors, (1130), 1130 states have call successors, (1130) [2022-03-18 02:49:55,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4306 states to 4306 states and 5718 transitions. [2022-03-18 02:49:55,787 INFO L78 Accepts]: Start accepts. Automaton has 4306 states and 5718 transitions. Word has length 133 [2022-03-18 02:49:55,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:49:55,787 INFO L478 AbstractCegarLoop]: Abstraction has 4306 states and 5718 transitions. [2022-03-18 02:49:55,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:49:55,788 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states and 5718 transitions. [2022-03-18 02:49:55,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-18 02:49:55,789 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:49:55,789 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:49:55,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-18 02:49:55,990 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:49:55,990 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:49:55,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:49:55,990 INFO L85 PathProgramCache]: Analyzing trace with hash -263391851, now seen corresponding path program 23 times [2022-03-18 02:49:55,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:49:55,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1396677775] [2022-03-18 02:49:55,990 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:49:55,991 INFO L85 PathProgramCache]: Analyzing trace with hash -263391851, now seen corresponding path program 24 times [2022-03-18 02:49:55,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:49:55,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927151644] [2022-03-18 02:49:55,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:49:55,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:49:55,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:49:55,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737808129] [2022-03-18 02:49:55,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:49:55,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:49:55,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:49:55,998 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:49:55,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-18 02:49:56,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-18 02:49:56,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:49:56,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-18 02:49:56,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:49:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 72 proven. 115 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-18 02:49:58,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:50:01,599 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:50:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 72 proven. 115 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-18 02:50:17,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:50:17,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927151644] [2022-03-18 02:50:17,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:50:17,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737808129] [2022-03-18 02:50:17,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737808129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:50:17,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:50:17,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2022-03-18 02:50:17,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:50:17,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1396677775] [2022-03-18 02:50:17,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1396677775] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:50:17,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:50:17,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 02:50:17,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670287034] [2022-03-18 02:50:17,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:50:17,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 02:50:17,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:50:17,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 02:50:17,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1043, Unknown=1, NotChecked=0, Total=1260 [2022-03-18 02:50:17,219 INFO L87 Difference]: Start difference. First operand 4306 states and 5718 transitions. Second operand has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 02:50:20,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:50:20,970 INFO L93 Difference]: Finished difference Result 4466 states and 5936 transitions. [2022-03-18 02:50:20,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 02:50:20,971 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 138 [2022-03-18 02:50:20,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:50:20,978 INFO L225 Difference]: With dead ends: 4466 [2022-03-18 02:50:20,978 INFO L226 Difference]: Without dead ends: 4459 [2022-03-18 02:50:20,979 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=317, Invalid=1488, Unknown=1, NotChecked=0, Total=1806 [2022-03-18 02:50:20,979 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 92 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 02:50:20,979 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 1272 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 02:50:20,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4459 states. [2022-03-18 02:50:21,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4459 to 4306. [2022-03-18 02:50:21,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4306 states, 2851 states have (on average 1.2101017186951946) internal successors, (3450), 2938 states have internal predecessors, (3450), 1137 states have call successors, (1137), 318 states have call predecessors, (1137), 317 states have return successors, (1130), 1049 states have call predecessors, (1130), 1130 states have call successors, (1130) [2022-03-18 02:50:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4306 states to 4306 states and 5717 transitions. [2022-03-18 02:50:21,982 INFO L78 Accepts]: Start accepts. Automaton has 4306 states and 5717 transitions. Word has length 138 [2022-03-18 02:50:21,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:50:21,983 INFO L478 AbstractCegarLoop]: Abstraction has 4306 states and 5717 transitions. [2022-03-18 02:50:21,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 02:50:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 4306 states and 5717 transitions. [2022-03-18 02:50:21,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-18 02:50:21,984 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:50:21,984 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:50:22,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-18 02:50:22,185 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-18 02:50:22,185 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:50:22,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:50:22,185 INFO L85 PathProgramCache]: Analyzing trace with hash -213306419, now seen corresponding path program 25 times [2022-03-18 02:50:22,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:50:22,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1835476614] [2022-03-18 02:50:22,186 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:50:22,186 INFO L85 PathProgramCache]: Analyzing trace with hash -213306419, now seen corresponding path program 26 times [2022-03-18 02:50:22,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:50:22,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834924962] [2022-03-18 02:50:22,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:50:22,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:50:22,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:50:22,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708675401] [2022-03-18 02:50:22,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:50:22,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:50:22,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:50:22,191 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:50:22,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-18 02:50:22,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:50:22,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:50:22,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-18 02:50:22,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:50:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 125 proven. 158 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2022-03-18 02:50:23,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:50:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 181 proven. 33 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2022-03-18 02:50:30,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:50:30,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834924962] [2022-03-18 02:50:30,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:50:30,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708675401] [2022-03-18 02:50:30,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708675401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:50:30,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:50:30,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 32 [2022-03-18 02:50:30,191 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:50:30,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1835476614] [2022-03-18 02:50:30,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1835476614] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:50:30,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:50:30,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 02:50:30,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684716058] [2022-03-18 02:50:30,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:50:30,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 02:50:30,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:50:30,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 02:50:30,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-18 02:50:30,192 INFO L87 Difference]: Start difference. First operand 4306 states and 5717 transitions. Second operand has 21 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-18 02:50:32,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:50:32,618 INFO L93 Difference]: Finished difference Result 4497 states and 5957 transitions. [2022-03-18 02:50:32,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-18 02:50:32,619 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 138 [2022-03-18 02:50:32,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:50:32,626 INFO L225 Difference]: With dead ends: 4497 [2022-03-18 02:50:32,626 INFO L226 Difference]: Without dead ends: 4494 [2022-03-18 02:50:32,627 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=209, Invalid=1197, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 02:50:32,627 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 102 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:50:32,627 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 1140 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 02:50:32,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2022-03-18 02:50:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 4378. [2022-03-18 02:50:33,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 2901 states have (on average 1.2071699413995174) internal successors, (3502), 2990 states have internal predecessors, (3502), 1147 states have call successors, (1147), 330 states have call predecessors, (1147), 329 states have return successors, (1140), 1057 states have call predecessors, (1140), 1140 states have call successors, (1140) [2022-03-18 02:50:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 5789 transitions. [2022-03-18 02:50:33,592 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 5789 transitions. Word has length 138 [2022-03-18 02:50:33,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:50:33,593 INFO L478 AbstractCegarLoop]: Abstraction has 4378 states and 5789 transitions. [2022-03-18 02:50:33,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-18 02:50:33,593 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 5789 transitions. [2022-03-18 02:50:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-18 02:50:33,594 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:50:33,594 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:50:33,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-18 02:50:33,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-18 02:50:33,795 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:50:33,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:50:33,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2103122581, now seen corresponding path program 27 times [2022-03-18 02:50:33,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:50:33,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1062865999] [2022-03-18 02:50:33,796 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:50:33,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2103122581, now seen corresponding path program 28 times [2022-03-18 02:50:33,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:50:33,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135686037] [2022-03-18 02:50:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:50:33,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:50:33,801 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:50:33,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663953403] [2022-03-18 02:50:33,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:50:33,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:50:33,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:50:33,802 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:50:33,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-18 02:50:33,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:50:33,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:50:33,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-18 02:50:33,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:50:34,578 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:50:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 158 proven. 128 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-03-18 02:50:37,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:50:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 188 proven. 19 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-03-18 02:50:46,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:50:46,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135686037] [2022-03-18 02:50:46,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:50:46,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663953403] [2022-03-18 02:50:46,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663953403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:50:46,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:50:46,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16] total 38 [2022-03-18 02:50:46,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:50:46,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1062865999] [2022-03-18 02:50:46,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1062865999] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:50:46,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:50:46,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-18 02:50:46,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931428612] [2022-03-18 02:50:46,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:50:46,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 02:50:46,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:50:46,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 02:50:46,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 02:50:46,851 INFO L87 Difference]: Start difference. First operand 4378 states and 5789 transitions. Second operand has 27 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-18 02:50:53,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:50:53,656 INFO L93 Difference]: Finished difference Result 4640 states and 6130 transitions. [2022-03-18 02:50:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 02:50:53,659 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 138 [2022-03-18 02:50:53,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:50:53,667 INFO L225 Difference]: With dead ends: 4640 [2022-03-18 02:50:53,667 INFO L226 Difference]: Without dead ends: 4637 [2022-03-18 02:50:53,667 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 236 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=346, Invalid=2306, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 02:50:53,668 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 136 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 1732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:50:53,668 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 1353 Invalid, 1732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-18 02:50:53,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4637 states. [2022-03-18 02:50:54,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4637 to 4511. [2022-03-18 02:50:54,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4511 states, 2986 states have (on average 1.2069658405894172) internal successors, (3604), 3078 states have internal predecessors, (3604), 1180 states have call successors, (1180), 345 states have call predecessors, (1180), 344 states have return successors, (1173), 1087 states have call predecessors, (1173), 1173 states have call successors, (1173) [2022-03-18 02:50:54,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4511 states to 4511 states and 5957 transitions. [2022-03-18 02:50:54,699 INFO L78 Accepts]: Start accepts. Automaton has 4511 states and 5957 transitions. Word has length 138 [2022-03-18 02:50:54,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:50:54,699 INFO L478 AbstractCegarLoop]: Abstraction has 4511 states and 5957 transitions. [2022-03-18 02:50:54,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.24) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-18 02:50:54,700 INFO L276 IsEmpty]: Start isEmpty. Operand 4511 states and 5957 transitions. [2022-03-18 02:50:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-18 02:50:54,702 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:50:54,702 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-18 02:50:54,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-18 02:50:54,925 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-18 02:50:54,925 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:50:54,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:50:54,926 INFO L85 PathProgramCache]: Analyzing trace with hash -734961387, now seen corresponding path program 9 times [2022-03-18 02:50:54,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:50:54,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1162930281] [2022-03-18 02:50:54,926 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:50:54,926 INFO L85 PathProgramCache]: Analyzing trace with hash -734961387, now seen corresponding path program 10 times [2022-03-18 02:50:54,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:50:54,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759010268] [2022-03-18 02:50:54,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:50:54,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:50:54,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:50:54,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184368978] [2022-03-18 02:50:54,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:50:54,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:50:54,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:50:54,932 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:50:54,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-18 02:50:55,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:50:55,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:50:55,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-18 02:50:55,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:51:04,551 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:51:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 74 proven. 201 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-03-18 02:51:08,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:51:11,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:51:11,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759010268] [2022-03-18 02:51:11,779 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:51:11,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184368978] [2022-03-18 02:51:11,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184368978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:51:11,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:51:11,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-18 02:51:11,779 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:51:11,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1162930281] [2022-03-18 02:51:11,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1162930281] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:51:11,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:51:11,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-18 02:51:11,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535162551] [2022-03-18 02:51:11,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:51:11,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 02:51:11,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:51:11,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 02:51:11,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 02:51:11,780 INFO L87 Difference]: Start difference. First operand 4511 states and 5957 transitions. Second operand has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 22 states have internal predecessors, (69), 10 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-18 02:51:30,281 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 02:51:31,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:51:31,544 INFO L93 Difference]: Finished difference Result 4756 states and 6289 transitions. [2022-03-18 02:51:31,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 02:51:31,545 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 22 states have internal predecessors, (69), 10 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) Word has length 136 [2022-03-18 02:51:31,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:51:31,554 INFO L225 Difference]: With dead ends: 4756 [2022-03-18 02:51:31,554 INFO L226 Difference]: Without dead ends: 4754 [2022-03-18 02:51:31,555 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=224, Invalid=1846, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 02:51:31,555 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 160 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1440 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:51:31,555 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 1440 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time] [2022-03-18 02:51:31,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4754 states. [2022-03-18 02:51:32,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4754 to 4685. [2022-03-18 02:51:32,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4685 states, 3098 states have (on average 1.21078114912847) internal successors, (3751), 3194 states have internal predecessors, (3751), 1229 states have call successors, (1229), 358 states have call predecessors, (1229), 357 states have return successors, (1222), 1132 states have call predecessors, (1222), 1222 states have call successors, (1222) [2022-03-18 02:51:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4685 states to 4685 states and 6202 transitions. [2022-03-18 02:51:32,665 INFO L78 Accepts]: Start accepts. Automaton has 4685 states and 6202 transitions. Word has length 136 [2022-03-18 02:51:32,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:51:32,666 INFO L478 AbstractCegarLoop]: Abstraction has 4685 states and 6202 transitions. [2022-03-18 02:51:32,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 22 states have internal predecessors, (69), 10 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 9 states have call successors, (16) [2022-03-18 02:51:32,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4685 states and 6202 transitions. [2022-03-18 02:51:32,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-18 02:51:32,668 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:51:32,668 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 8, 7, 5, 4, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1] [2022-03-18 02:51:32,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-18 02:51:32,868 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:51:32,868 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:51:32,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:51:32,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1876530728, now seen corresponding path program 11 times [2022-03-18 02:51:32,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:51:32,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [291939799] [2022-03-18 02:51:32,869 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:51:32,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1876530728, now seen corresponding path program 12 times [2022-03-18 02:51:32,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:51:32,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535270098] [2022-03-18 02:51:32,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:51:32,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:51:32,875 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:51:32,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292173245] [2022-03-18 02:51:32,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:51:32,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:51:32,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:51:32,876 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:51:32,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-18 02:51:33,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-18 02:51:33,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:51:33,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 02:51:33,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:51:33,656 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 52 proven. 306 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-18 02:51:33,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:51:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 52 proven. 114 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-18 02:51:34,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:51:34,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535270098] [2022-03-18 02:51:34,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:51:34,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292173245] [2022-03-18 02:51:34,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292173245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:51:34,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:51:34,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-18 02:51:34,102 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:51:34,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [291939799] [2022-03-18 02:51:34,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [291939799] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:51:34,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:51:34,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 02:51:34,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035306111] [2022-03-18 02:51:34,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:51:34,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 02:51:34,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:51:34,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 02:51:34,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 02:51:34,103 INFO L87 Difference]: Start difference. First operand 4685 states and 6202 transitions. Second operand has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:51:35,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:51:35,631 INFO L93 Difference]: Finished difference Result 6236 states and 8592 transitions. [2022-03-18 02:51:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 02:51:35,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 137 [2022-03-18 02:51:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:51:35,645 INFO L225 Difference]: With dead ends: 6236 [2022-03-18 02:51:35,646 INFO L226 Difference]: Without dead ends: 4946 [2022-03-18 02:51:35,651 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=873, Invalid=1197, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 02:51:35,652 INFO L912 BasicCegarLoop]: 96 mSDtfsCounter, 397 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:51:35,652 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 453 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:51:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4946 states. [2022-03-18 02:51:36,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4946 to 4849. [2022-03-18 02:51:36,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4849 states, 3260 states have (on average 1.211042944785276) internal successors, (3948), 3313 states have internal predecessors, (3948), 1229 states have call successors, (1229), 360 states have call predecessors, (1229), 359 states have return successors, (1222), 1175 states have call predecessors, (1222), 1222 states have call successors, (1222) [2022-03-18 02:51:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4849 states to 4849 states and 6399 transitions. [2022-03-18 02:51:36,912 INFO L78 Accepts]: Start accepts. Automaton has 4849 states and 6399 transitions. Word has length 137 [2022-03-18 02:51:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:51:36,912 INFO L478 AbstractCegarLoop]: Abstraction has 4849 states and 6399 transitions. [2022-03-18 02:51:36,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.166666666666667) internal successors, (75), 17 states have internal predecessors, (75), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:51:36,912 INFO L276 IsEmpty]: Start isEmpty. Operand 4849 states and 6399 transitions. [2022-03-18 02:51:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-18 02:51:36,914 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:51:36,914 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 8, 7, 6, 5, 5, 5, 4, 3, 3, 3, 3, 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, 1] [2022-03-18 02:51:36,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-18 02:51:37,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:51:37,115 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:51:37,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:51:37,115 INFO L85 PathProgramCache]: Analyzing trace with hash 414084436, now seen corresponding path program 11 times [2022-03-18 02:51:37,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:51:37,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1401687342] [2022-03-18 02:51:37,116 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:51:37,116 INFO L85 PathProgramCache]: Analyzing trace with hash 414084436, now seen corresponding path program 12 times [2022-03-18 02:51:37,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:51:37,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113240548] [2022-03-18 02:51:37,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:51:37,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:51:37,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:51:37,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119517475] [2022-03-18 02:51:37,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:51:37,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:51:37,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:51:37,124 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:51:37,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-18 02:51:38,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-18 02:51:38,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:51:38,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 02:51:38,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:51:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 38 proven. 329 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-18 02:51:38,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:51:39,312 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 38 proven. 137 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-18 02:51:39,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:51:39,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113240548] [2022-03-18 02:51:39,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:51:39,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119517475] [2022-03-18 02:51:39,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119517475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:51:39,312 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:51:39,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-18 02:51:39,312 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:51:39,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1401687342] [2022-03-18 02:51:39,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1401687342] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:51:39,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:51:39,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 02:51:39,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111913791] [2022-03-18 02:51:39,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:51:39,313 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 02:51:39,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:51:39,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 02:51:39,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 02:51:39,314 INFO L87 Difference]: Start difference. First operand 4849 states and 6399 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:51:41,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:51:41,125 INFO L93 Difference]: Finished difference Result 6374 states and 8659 transitions. [2022-03-18 02:51:41,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 02:51:41,126 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 138 [2022-03-18 02:51:41,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:51:41,135 INFO L225 Difference]: With dead ends: 6374 [2022-03-18 02:51:41,135 INFO L226 Difference]: Without dead ends: 5677 [2022-03-18 02:51:41,137 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=996, Invalid=1356, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 02:51:41,137 INFO L912 BasicCegarLoop]: 97 mSDtfsCounter, 446 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:51:41,138 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 455 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 02:51:41,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5677 states. [2022-03-18 02:51:42,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5677 to 5354. [2022-03-18 02:51:42,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5354 states, 3516 states have (on average 1.2070534698521047) internal successors, (4244), 3577 states have internal predecessors, (4244), 1435 states have call successors, (1435), 403 states have call predecessors, (1435), 402 states have return successors, (1427), 1373 states have call predecessors, (1427), 1427 states have call successors, (1427) [2022-03-18 02:51:42,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5354 states to 5354 states and 7106 transitions. [2022-03-18 02:51:42,508 INFO L78 Accepts]: Start accepts. Automaton has 5354 states and 7106 transitions. Word has length 138 [2022-03-18 02:51:42,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:51:42,508 INFO L478 AbstractCegarLoop]: Abstraction has 5354 states and 7106 transitions. [2022-03-18 02:51:42,508 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:51:42,508 INFO L276 IsEmpty]: Start isEmpty. Operand 5354 states and 7106 transitions. [2022-03-18 02:51:42,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-18 02:51:42,510 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:51:42,510 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:51:42,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-18 02:51:42,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:51:42,711 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:51:42,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:51:42,711 INFO L85 PathProgramCache]: Analyzing trace with hash -392647317, now seen corresponding path program 29 times [2022-03-18 02:51:42,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:51:42,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1972085382] [2022-03-18 02:51:42,712 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:51:42,712 INFO L85 PathProgramCache]: Analyzing trace with hash -392647317, now seen corresponding path program 30 times [2022-03-18 02:51:42,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:51:42,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677224662] [2022-03-18 02:51:42,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:51:42,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:51:42,717 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:51:42,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267645987] [2022-03-18 02:51:42,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:51:42,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:51:42,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:51:42,719 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:51:42,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-18 02:51:42,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-18 02:51:42,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:51:42,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-18 02:51:42,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:51:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 46 proven. 116 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-03-18 02:51:44,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:51:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 46 proven. 116 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-03-18 02:51:51,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:51:51,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677224662] [2022-03-18 02:51:51,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:51:51,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267645987] [2022-03-18 02:51:51,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267645987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:51:51,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:51:51,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 39 [2022-03-18 02:51:51,898 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:51:51,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1972085382] [2022-03-18 02:51:51,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1972085382] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:51:51,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:51:51,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 02:51:51,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593308417] [2022-03-18 02:51:51,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:51:51,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 02:51:51,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:51:51,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 02:51:51,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 02:51:51,900 INFO L87 Difference]: Start difference. First operand 5354 states and 7106 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 02:51:54,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:51:54,501 INFO L93 Difference]: Finished difference Result 5542 states and 7333 transitions. [2022-03-18 02:51:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 02:51:54,502 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 142 [2022-03-18 02:51:54,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:51:54,512 INFO L225 Difference]: With dead ends: 5542 [2022-03-18 02:51:54,512 INFO L226 Difference]: Without dead ends: 5535 [2022-03-18 02:51:54,513 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 242 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=477, Invalid=2175, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 02:51:54,513 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 128 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 02:51:54,513 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 805 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 02:51:54,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2022-03-18 02:51:55,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 5392. [2022-03-18 02:51:55,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 3543 states have (on average 1.2054755856618684) internal successors, (4271), 3604 states have internal predecessors, (4271), 1437 states have call successors, (1437), 412 states have call predecessors, (1437), 411 states have return successors, (1429), 1375 states have call predecessors, (1429), 1429 states have call successors, (1429) [2022-03-18 02:51:55,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 7137 transitions. [2022-03-18 02:51:55,907 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 7137 transitions. Word has length 142 [2022-03-18 02:51:55,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:51:55,907 INFO L478 AbstractCegarLoop]: Abstraction has 5392 states and 7137 transitions. [2022-03-18 02:51:55,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 20 states have internal predecessors, (57), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 02:51:55,907 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 7137 transitions. [2022-03-18 02:51:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-18 02:51:55,910 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:51:55,910 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-18 02:51:55,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-18 02:51:56,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-03-18 02:51:56,110 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:51:56,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:51:56,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1045312758, now seen corresponding path program 31 times [2022-03-18 02:51:56,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:51:56,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1595606567] [2022-03-18 02:51:56,111 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:51:56,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1045312758, now seen corresponding path program 32 times [2022-03-18 02:51:56,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:51:56,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331498016] [2022-03-18 02:51:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:51:56,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:51:56,116 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:51:56,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [490335026] [2022-03-18 02:51:56,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:51:56,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:51:56,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:51:56,118 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:51:56,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-18 02:51:56,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:51:56,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:51:56,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-18 02:51:56,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:51:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 130 proven. 140 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-03-18 02:51:58,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:51:59,739 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:01,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:52:01,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331498016] [2022-03-18 02:52:01,565 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:52:01,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490335026] [2022-03-18 02:52:01,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490335026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:52:01,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:52:01,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-18 02:52:01,566 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:52:01,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1595606567] [2022-03-18 02:52:01,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1595606567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:52:01,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:52:01,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 02:52:01,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696212643] [2022-03-18 02:52:01,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:52:01,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 02:52:01,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:52:01,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 02:52:01,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-03-18 02:52:01,567 INFO L87 Difference]: Start difference. First operand 5392 states and 7137 transitions. Second operand has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 02:52:07,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:52:07,083 INFO L93 Difference]: Finished difference Result 5585 states and 7396 transitions. [2022-03-18 02:52:07,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 02:52:07,084 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 145 [2022-03-18 02:52:07,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:52:07,095 INFO L225 Difference]: With dead ends: 5585 [2022-03-18 02:52:07,095 INFO L226 Difference]: Without dead ends: 5578 [2022-03-18 02:52:07,097 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=213, Invalid=1857, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 02:52:07,097 INFO L912 BasicCegarLoop]: 100 mSDtfsCounter, 134 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 02:52:07,097 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1351 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1421 Invalid, 0 Unknown, 33 Unchecked, 1.5s Time] [2022-03-18 02:52:07,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5578 states. [2022-03-18 02:52:08,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5578 to 5418. [2022-03-18 02:52:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5418 states, 3563 states have (on average 1.2048835251192815) internal successors, (4293), 3621 states have internal predecessors, (4293), 1443 states have call successors, (1443), 416 states have call predecessors, (1443), 411 states have return successors, (1435), 1380 states have call predecessors, (1435), 1435 states have call successors, (1435) [2022-03-18 02:52:08,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5418 states to 5418 states and 7171 transitions. [2022-03-18 02:52:08,494 INFO L78 Accepts]: Start accepts. Automaton has 5418 states and 7171 transitions. Word has length 145 [2022-03-18 02:52:08,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:52:08,494 INFO L478 AbstractCegarLoop]: Abstraction has 5418 states and 7171 transitions. [2022-03-18 02:52:08,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 02:52:08,494 INFO L276 IsEmpty]: Start isEmpty. Operand 5418 states and 7171 transitions. [2022-03-18 02:52:08,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-18 02:52:08,496 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:52:08,496 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-03-18 02:52:08,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-18 02:52:08,697 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:52:08,697 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:52:08,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:52:08,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1271116242, now seen corresponding path program 33 times [2022-03-18 02:52:08,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:52:08,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2128623167] [2022-03-18 02:52:08,698 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:52:08,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1271116242, now seen corresponding path program 34 times [2022-03-18 02:52:08,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:52:08,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573419124] [2022-03-18 02:52:08,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:52:08,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:52:08,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:52:08,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867218286] [2022-03-18 02:52:08,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:52:08,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:52:08,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:52:08,707 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:52:08,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-18 02:52:08,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:52:08,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:52:08,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-18 02:52:08,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:52:09,635 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 140 proven. 103 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-03-18 02:52:18,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:52:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 198 proven. 19 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-03-18 02:52:24,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:52:24,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573419124] [2022-03-18 02:52:24,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:52:24,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867218286] [2022-03-18 02:52:24,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867218286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:52:24,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:52:24,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16] total 35 [2022-03-18 02:52:24,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:52:24,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2128623167] [2022-03-18 02:52:24,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2128623167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:52:24,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:52:24,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 02:52:24,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152883220] [2022-03-18 02:52:24,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:52:24,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 02:52:24,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:52:24,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 02:52:24,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 02:52:24,851 INFO L87 Difference]: Start difference. First operand 5418 states and 7171 transitions. Second operand has 24 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 02:52:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:52:27,285 INFO L93 Difference]: Finished difference Result 5477 states and 7238 transitions. [2022-03-18 02:52:27,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 02:52:27,286 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 145 [2022-03-18 02:52:27,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:52:27,296 INFO L225 Difference]: With dead ends: 5477 [2022-03-18 02:52:27,297 INFO L226 Difference]: Without dead ends: 5470 [2022-03-18 02:52:27,298 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 02:52:27,298 INFO L912 BasicCegarLoop]: 86 mSDtfsCounter, 99 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 532 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 02:52:27,298 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 1417 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 607 Invalid, 0 Unknown, 532 Unchecked, 0.6s Time] [2022-03-18 02:52:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5470 states. [2022-03-18 02:52:28,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5470 to 5418. [2022-03-18 02:52:28,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5418 states, 3563 states have (on average 1.2048835251192815) internal successors, (4293), 3621 states have internal predecessors, (4293), 1443 states have call successors, (1443), 416 states have call predecessors, (1443), 411 states have return successors, (1435), 1380 states have call predecessors, (1435), 1435 states have call successors, (1435) [2022-03-18 02:52:28,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5418 states to 5418 states and 7171 transitions. [2022-03-18 02:52:28,749 INFO L78 Accepts]: Start accepts. Automaton has 5418 states and 7171 transitions. Word has length 145 [2022-03-18 02:52:28,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:52:28,749 INFO L478 AbstractCegarLoop]: Abstraction has 5418 states and 7171 transitions. [2022-03-18 02:52:28,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 02:52:28,750 INFO L276 IsEmpty]: Start isEmpty. Operand 5418 states and 7171 transitions. [2022-03-18 02:52:28,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-18 02:52:28,752 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:52:28,752 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 8, 8, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:52:28,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-18 02:52:28,953 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-18 02:52:28,953 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:52:28,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:52:28,954 INFO L85 PathProgramCache]: Analyzing trace with hash 828416914, now seen corresponding path program 11 times [2022-03-18 02:52:28,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:52:28,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2050642541] [2022-03-18 02:52:28,954 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:52:28,954 INFO L85 PathProgramCache]: Analyzing trace with hash 828416914, now seen corresponding path program 12 times [2022-03-18 02:52:28,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:52:28,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254384538] [2022-03-18 02:52:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:52:28,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:52:28,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:52:28,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780398589] [2022-03-18 02:52:28,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:52:28,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:52:28,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:52:28,960 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:52:28,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-18 02:52:29,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 02:52:29,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:52:29,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 02:52:29,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:52:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 166 proven. 50 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-03-18 02:52:29,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:52:30,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:52:30,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254384538] [2022-03-18 02:52:30,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:52:30,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780398589] [2022-03-18 02:52:30,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780398589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:52:30,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:52:30,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-18 02:52:30,801 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:52:30,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2050642541] [2022-03-18 02:52:30,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2050642541] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:52:30,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:52:30,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 02:52:30,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675401858] [2022-03-18 02:52:30,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:52:30,802 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 02:52:30,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:52:30,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 02:52:30,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-18 02:52:30,803 INFO L87 Difference]: Start difference. First operand 5418 states and 7171 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 02:52:33,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:52:33,031 INFO L93 Difference]: Finished difference Result 6170 states and 8256 transitions. [2022-03-18 02:52:33,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 02:52:33,032 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 143 [2022-03-18 02:52:33,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:52:33,069 INFO L225 Difference]: With dead ends: 6170 [2022-03-18 02:52:33,069 INFO L226 Difference]: Without dead ends: 6168 [2022-03-18 02:52:33,070 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-03-18 02:52:33,071 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 157 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:52:33,071 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 356 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:52:33,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6168 states. [2022-03-18 02:52:34,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6168 to 6051. [2022-03-18 02:52:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6051 states, 4070 states have (on average 1.2331695331695331) internal successors, (5019), 4148 states have internal predecessors, (5019), 1560 states have call successors, (1560), 425 states have call predecessors, (1560), 420 states have return successors, (1552), 1477 states have call predecessors, (1552), 1552 states have call successors, (1552) [2022-03-18 02:52:34,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6051 states to 6051 states and 8131 transitions. [2022-03-18 02:52:34,639 INFO L78 Accepts]: Start accepts. Automaton has 6051 states and 8131 transitions. Word has length 143 [2022-03-18 02:52:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:52:34,639 INFO L478 AbstractCegarLoop]: Abstraction has 6051 states and 8131 transitions. [2022-03-18 02:52:34,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-03-18 02:52:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 6051 states and 8131 transitions. [2022-03-18 02:52:34,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-18 02:52:34,643 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:52:34,643 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 9, 8, 6, 5, 5, 5, 4, 4, 4, 4, 3, 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, 1, 1] [2022-03-18 02:52:34,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-18 02:52:34,866 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-18 02:52:34,866 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:52:34,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:52:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash -656443653, now seen corresponding path program 13 times [2022-03-18 02:52:34,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:52:34,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1783750099] [2022-03-18 02:52:34,867 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:52:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash -656443653, now seen corresponding path program 14 times [2022-03-18 02:52:34,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:52:34,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218859161] [2022-03-18 02:52:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:52:34,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:52:34,872 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:52:34,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033505131] [2022-03-18 02:52:34,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:52:34,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:52:34,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:52:34,873 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:52:34,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-18 02:52:34,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:52:34,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:52:34,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 02:52:34,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:52:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 57 proven. 342 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-18 02:52:35,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:52:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 57 proven. 150 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-18 02:52:35,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:52:35,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218859161] [2022-03-18 02:52:35,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:52:35,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033505131] [2022-03-18 02:52:35,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033505131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:52:35,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:52:35,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-18 02:52:35,760 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:52:35,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1783750099] [2022-03-18 02:52:35,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1783750099] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:52:35,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:52:35,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 02:52:35,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820379211] [2022-03-18 02:52:35,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:52:35,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 02:52:35,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:52:35,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 02:52:35,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 02:52:35,761 INFO L87 Difference]: Start difference. First operand 6051 states and 8131 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:52:38,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:52:38,373 INFO L93 Difference]: Finished difference Result 9027 states and 12642 transitions. [2022-03-18 02:52:38,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 02:52:38,373 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 144 [2022-03-18 02:52:38,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:52:38,386 INFO L225 Difference]: With dead ends: 9027 [2022-03-18 02:52:38,386 INFO L226 Difference]: Without dead ends: 7193 [2022-03-18 02:52:38,390 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1125, Invalid=1527, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 02:52:38,391 INFO L912 BasicCegarLoop]: 103 mSDtfsCounter, 417 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 02:52:38,391 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 502 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 02:52:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7193 states. [2022-03-18 02:52:40,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7193 to 7078. [2022-03-18 02:52:40,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 4784 states have (on average 1.223453177257525) internal successors, (5853), 4871 states have internal predecessors, (5853), 1826 states have call successors, (1826), 473 states have call predecessors, (1826), 467 states have return successors, (1817), 1733 states have call predecessors, (1817), 1817 states have call successors, (1817) [2022-03-18 02:52:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 9496 transitions. [2022-03-18 02:52:40,371 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 9496 transitions. Word has length 144 [2022-03-18 02:52:40,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:52:40,371 INFO L478 AbstractCegarLoop]: Abstraction has 7078 states and 9496 transitions. [2022-03-18 02:52:40,371 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 19 states have internal predecessors, (82), 6 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2022-03-18 02:52:40,371 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 9496 transitions. [2022-03-18 02:52:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-18 02:52:40,374 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:52:40,374 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:52:40,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-18 02:52:40,574 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-18 02:52:40,574 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:52:40,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:52:40,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1774625240, now seen corresponding path program 35 times [2022-03-18 02:52:40,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:52:40,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1588987239] [2022-03-18 02:52:40,575 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:52:40,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1774625240, now seen corresponding path program 36 times [2022-03-18 02:52:40,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:52:40,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954129785] [2022-03-18 02:52:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:52:40,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:52:40,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:52:40,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [251323342] [2022-03-18 02:52:40,580 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:52:40,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:52:40,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:52:40,581 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:52:40,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-18 02:52:40,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-18 02:52:40,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:52:40,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-18 02:52:40,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:52:57,226 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:52:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 46 proven. 142 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2022-03-18 02:52:57,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:53:02,425 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:53:02,506 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:53:03,352 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:53:03,486 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:53:03,639 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:53:03,766 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:53:03,848 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:53:04,429 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:53:04,515 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:53:04,755 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:53:04,839 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:53:05,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:53:05,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954129785] [2022-03-18 02:53:05,008 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:53:05,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251323342] [2022-03-18 02:53:05,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251323342] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:53:05,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:53:05,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-03-18 02:53:05,008 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:53:05,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1588987239] [2022-03-18 02:53:05,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1588987239] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:53:05,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:53:05,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 02:53:05,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089553518] [2022-03-18 02:53:05,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:53:05,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 02:53:05,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:53:05,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 02:53:05,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1270, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 02:53:05,010 INFO L87 Difference]: Start difference. First operand 7078 states and 9496 transitions. Second operand has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 02:53:07,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:53:07,688 INFO L93 Difference]: Finished difference Result 7138 states and 9564 transitions. [2022-03-18 02:53:07,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 02:53:07,689 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 149 [2022-03-18 02:53:07,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:53:07,701 INFO L225 Difference]: With dead ends: 7138 [2022-03-18 02:53:07,701 INFO L226 Difference]: Without dead ends: 7131 [2022-03-18 02:53:07,702 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 02:53:07,703 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 79 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 568 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 02:53:07,703 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 1535 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 474 Invalid, 0 Unknown, 568 Unchecked, 0.3s Time] [2022-03-18 02:53:07,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7131 states. [2022-03-18 02:53:09,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7131 to 7088. [2022-03-18 02:53:09,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7088 states, 4793 states have (on average 1.2230335906530356) internal successors, (5862), 4879 states have internal predecessors, (5862), 1827 states have call successors, (1827), 473 states have call predecessors, (1827), 467 states have return successors, (1818), 1735 states have call predecessors, (1818), 1818 states have call successors, (1818) [2022-03-18 02:53:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7088 states to 7088 states and 9507 transitions. [2022-03-18 02:53:09,722 INFO L78 Accepts]: Start accepts. Automaton has 7088 states and 9507 transitions. Word has length 149 [2022-03-18 02:53:09,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:53:09,722 INFO L478 AbstractCegarLoop]: Abstraction has 7088 states and 9507 transitions. [2022-03-18 02:53:09,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 states have internal predecessors, (64), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-18 02:53:09,722 INFO L276 IsEmpty]: Start isEmpty. Operand 7088 states and 9507 transitions. [2022-03-18 02:53:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-18 02:53:09,724 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:53:09,724 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:53:09,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-18 02:53:09,925 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-18 02:53:09,925 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:53:09,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:53:09,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1181195580, now seen corresponding path program 37 times [2022-03-18 02:53:09,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:53:09,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1762085173] [2022-03-18 02:53:09,926 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:53:09,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1181195580, now seen corresponding path program 38 times [2022-03-18 02:53:09,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:53:09,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576677068] [2022-03-18 02:53:09,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:53:09,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:53:09,930 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:53:09,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86715933] [2022-03-18 02:53:09,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 02:53:09,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:53:09,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:53:09,931 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:53:09,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-18 02:53:10,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 02:53:10,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:53:10,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-18 02:53:10,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:53:11,627 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 97 proven. 190 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-03-18 02:53:11,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:53:14,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:53:14,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576677068] [2022-03-18 02:53:14,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:53:14,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86715933] [2022-03-18 02:53:14,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86715933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 02:53:14,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 02:53:14,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-18 02:53:14,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:53:14,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1762085173] [2022-03-18 02:53:14,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1762085173] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:53:14,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:53:14,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 02:53:14,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221186246] [2022-03-18 02:53:14,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:53:14,787 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 02:53:14,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:53:14,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 02:53:14,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-03-18 02:53:14,788 INFO L87 Difference]: Start difference. First operand 7088 states and 9507 transitions. Second operand has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 02:53:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:53:21,708 INFO L93 Difference]: Finished difference Result 7277 states and 9749 transitions. [2022-03-18 02:53:21,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 02:53:21,709 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 149 [2022-03-18 02:53:21,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:53:21,722 INFO L225 Difference]: With dead ends: 7277 [2022-03-18 02:53:21,722 INFO L226 Difference]: Without dead ends: 7274 [2022-03-18 02:53:21,723 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=177, Invalid=1545, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 02:53:21,724 INFO L912 BasicCegarLoop]: 96 mSDtfsCounter, 129 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-18 02:53:21,724 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1463 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-18 02:53:21,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2022-03-18 02:53:23,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 7136. [2022-03-18 02:53:23,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7136 states, 4825 states have (on average 1.2219689119170984) internal successors, (5896), 4911 states have internal predecessors, (5896), 1836 states have call successors, (1836), 480 states have call predecessors, (1836), 474 states have return successors, (1827), 1744 states have call predecessors, (1827), 1827 states have call successors, (1827) [2022-03-18 02:53:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7136 states to 7136 states and 9559 transitions. [2022-03-18 02:53:23,772 INFO L78 Accepts]: Start accepts. Automaton has 7136 states and 9559 transitions. Word has length 149 [2022-03-18 02:53:23,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:53:23,772 INFO L478 AbstractCegarLoop]: Abstraction has 7136 states and 9559 transitions. [2022-03-18 02:53:23,772 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-18 02:53:23,772 INFO L276 IsEmpty]: Start isEmpty. Operand 7136 states and 9559 transitions. [2022-03-18 02:53:23,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-18 02:53:23,775 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:53:23,775 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:53:23,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-18 02:53:23,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:53:23,976 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:53:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:53:23,976 INFO L85 PathProgramCache]: Analyzing trace with hash 205680083, now seen corresponding path program 39 times [2022-03-18 02:53:23,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:53:23,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1004188039] [2022-03-18 02:53:23,976 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:53:23,976 INFO L85 PathProgramCache]: Analyzing trace with hash 205680083, now seen corresponding path program 40 times [2022-03-18 02:53:23,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:53:23,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009357059] [2022-03-18 02:53:23,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:53:23,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:53:23,982 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:53:23,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548266945] [2022-03-18 02:53:23,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 02:53:23,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:53:23,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:53:23,984 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:53:23,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-18 02:53:24,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 02:53:24,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:53:24,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-18 02:53:24,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:53:27,232 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:53:27,794 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:53:46,744 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:53:46,748 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:53:46,752 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:53:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 210 proven. 108 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2022-03-18 02:53:57,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:54:29,806 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:55:22,546 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:55:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 210 proven. 105 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2022-03-18 02:55:34,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 02:55:34,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009357059] [2022-03-18 02:55:34,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 02:55:34,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548266945] [2022-03-18 02:55:34,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548266945] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 02:55:34,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 02:55:34,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 42 [2022-03-18 02:55:34,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 02:55:34,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1004188039] [2022-03-18 02:55:34,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1004188039] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 02:55:34,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 02:55:34,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 02:55:34,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540646521] [2022-03-18 02:55:34,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 02:55:34,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 02:55:34,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 02:55:34,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 02:55:34,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1394, Unknown=10, NotChecked=0, Total=1722 [2022-03-18 02:55:34,762 INFO L87 Difference]: Start difference. First operand 7136 states and 9559 transitions. Second operand has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-18 02:55:51,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 02:55:51,859 INFO L93 Difference]: Finished difference Result 7156 states and 9579 transitions. [2022-03-18 02:55:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 02:55:51,860 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 8 states have call successors, (23) Word has length 154 [2022-03-18 02:55:51,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 02:55:51,873 INFO L225 Difference]: With dead ends: 7156 [2022-03-18 02:55:51,873 INFO L226 Difference]: Without dead ends: 7149 [2022-03-18 02:55:51,874 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 265 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 69.9s TimeCoverageRelationStatistics Valid=399, Invalid=1845, Unknown=12, NotChecked=0, Total=2256 [2022-03-18 02:55:51,874 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 87 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-18 02:55:51,874 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 613 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 763 Invalid, 0 Unknown, 295 Unchecked, 2.7s Time] [2022-03-18 02:55:51,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7149 states. [2022-03-18 02:55:53,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7149 to 7140. [2022-03-18 02:55:53,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7140 states, 4829 states have (on average 1.2217850486643198) internal successors, (5900), 4915 states have internal predecessors, (5900), 1836 states have call successors, (1836), 480 states have call predecessors, (1836), 474 states have return successors, (1827), 1744 states have call predecessors, (1827), 1827 states have call successors, (1827) [2022-03-18 02:55:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7140 states to 7140 states and 9563 transitions. [2022-03-18 02:55:53,867 INFO L78 Accepts]: Start accepts. Automaton has 7140 states and 9563 transitions. Word has length 154 [2022-03-18 02:55:53,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 02:55:53,867 INFO L478 AbstractCegarLoop]: Abstraction has 7140 states and 9563 transitions. [2022-03-18 02:55:53,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 21 states have internal predecessors, (52), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 10 states have call predecessors, (23), 8 states have call successors, (23) [2022-03-18 02:55:53,868 INFO L276 IsEmpty]: Start isEmpty. Operand 7140 states and 9563 transitions. [2022-03-18 02:55:53,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-18 02:55:53,870 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 02:55:53,871 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 02:55:53,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-18 02:55:54,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:55:54,071 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 02:55:54,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 02:55:54,072 INFO L85 PathProgramCache]: Analyzing trace with hash 215045455, now seen corresponding path program 41 times [2022-03-18 02:55:54,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 02:55:54,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2012598186] [2022-03-18 02:55:54,072 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 02:55:54,072 INFO L85 PathProgramCache]: Analyzing trace with hash 215045455, now seen corresponding path program 42 times [2022-03-18 02:55:54,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 02:55:54,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469518437] [2022-03-18 02:55:54,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 02:55:54,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 02:55:54,078 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 02:55:54,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [992252522] [2022-03-18 02:55:54,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 02:55:54,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 02:55:54,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 02:55:54,080 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 02:55:54,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-18 02:55:54,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-18 02:55:54,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 02:55:54,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 02:55:54,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 02:56:19,359 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:56:19,362 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 02:56:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 99 proven. 170 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2022-03-18 02:56:32,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 02:56:40,083 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful