/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/mannadiv_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 04:05:12,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 04:05:12,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 04:05:12,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 04:05:12,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 04:05:12,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 04:05:12,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 04:05:12,344 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 04:05:12,351 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 04:05:12,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 04:05:12,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 04:05:12,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 04:05:12,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 04:05:12,353 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 04:05:12,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 04:05:12,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 04:05:12,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 04:05:12,353 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 04:05:12,354 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 04:05:12,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 04:05:12,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 04:05:12,354 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 04:05:12,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 04:05:12,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 04:05:12,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 04:05:12,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 04:05:12,361 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 04:05:12,361 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 04:05:12,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 04:05:12,361 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 04:05:12,362 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 04:05:12,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 04:05:12,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 04:05:12,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 04:05:12,579 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 04:05:12,581 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 04:05:12,582 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound100.c [2022-03-18 04:05:12,632 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46a14e885/9b53f4a00a494294b5c7c9b73a567891/FLAGfd8213576 [2022-03-18 04:05:13,015 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 04:05:13,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound100.c [2022-03-18 04:05:13,021 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46a14e885/9b53f4a00a494294b5c7c9b73a567891/FLAGfd8213576 [2022-03-18 04:05:13,429 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46a14e885/9b53f4a00a494294b5c7c9b73a567891 [2022-03-18 04:05:13,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 04:05:13,433 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 04:05:13,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 04:05:13,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 04:05:13,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 04:05:13,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:05:13" (1/1) ... [2022-03-18 04:05:13,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@445701b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:05:13, skipping insertion in model container [2022-03-18 04:05:13,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 04:05:13" (1/1) ... [2022-03-18 04:05:13,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 04:05:13,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 04:05:13,644 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/mannadiv_unwindbound100.c[573,586] [2022-03-18 04:05:13,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 04:05:13,665 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 04:05:13,677 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/mannadiv_unwindbound100.c[573,586] [2022-03-18 04:05:13,688 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 04:05:13,704 INFO L208 MainTranslator]: Completed translation [2022-03-18 04:05:13,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:05:13 WrapperNode [2022-03-18 04:05:13,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 04:05:13,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 04:05:13,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 04:05:13,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 04:05:13,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:05:13" (1/1) ... [2022-03-18 04:05:13,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:05:13" (1/1) ... [2022-03-18 04:05:13,721 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:05:13" (1/1) ... [2022-03-18 04:05:13,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:05:13" (1/1) ... [2022-03-18 04:05:13,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:05:13" (1/1) ... [2022-03-18 04:05:13,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:05:13" (1/1) ... [2022-03-18 04:05:13,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:05:13" (1/1) ... [2022-03-18 04:05:13,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 04:05:13,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 04:05:13,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 04:05:13,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 04:05:13,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:05:13" (1/1) ... [2022-03-18 04:05:13,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 04:05:13,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:13,784 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 04:05:13,814 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 04:05:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 04:05:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 04:05:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 04:05:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 04:05:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 04:05:13,836 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 04:05:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 04:05:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 04:05:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 04:05:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 04:05:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 04:05:13,837 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 04:05:13,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 04:05:13,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 04:05:13,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 04:05:13,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 04:05:13,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 04:05:13,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 04:05:13,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 04:05:13,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 04:05:13,894 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 04:05:13,895 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 04:05:14,045 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 04:05:14,050 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 04:05:14,050 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 04:05:14,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:05:14 BoogieIcfgContainer [2022-03-18 04:05:14,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 04:05:14,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 04:05:14,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 04:05:14,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 04:05:14,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 04:05:13" (1/3) ... [2022-03-18 04:05:14,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19eefed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:05:14, skipping insertion in model container [2022-03-18 04:05:14,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 04:05:13" (2/3) ... [2022-03-18 04:05:14,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19eefed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 04:05:14, skipping insertion in model container [2022-03-18 04:05:14,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 04:05:14" (3/3) ... [2022-03-18 04:05:14,072 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound100.c [2022-03-18 04:05:14,076 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 04:05:14,076 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 04:05:14,146 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 04:05:14,151 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 04:05:14,152 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 04:05:14,172 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 04:05:14,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 04:05:14,178 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:14,179 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:14,179 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:14,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:14,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2022-03-18 04:05:14,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:14,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1318467051] [2022-03-18 04:05:14,209 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:14,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 2 times [2022-03-18 04:05:14,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:14,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96469346] [2022-03-18 04:05:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:14,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:05:14,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 04:05:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:05:14,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 04:05:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:05:14,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 04:05:14,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 04:05:14,429 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 04:05:14,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:14,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96469346] [2022-03-18 04:05:14,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96469346] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:14,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:14,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 04:05:14,433 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:14,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1318467051] [2022-03-18 04:05:14,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1318467051] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:14,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:14,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 04:05:14,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244268863] [2022-03-18 04:05:14,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:14,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 04:05:14,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:14,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 04:05:14,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 04:05:14,465 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 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 04:05:14,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:14,546 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2022-03-18 04:05:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 04:05:14,549 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 04:05:14,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:14,556 INFO L225 Difference]: With dead ends: 54 [2022-03-18 04:05:14,556 INFO L226 Difference]: Without dead ends: 26 [2022-03-18 04:05:14,559 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 04:05:14,563 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:14,565 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 35 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:05:14,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-18 04:05:14,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-03-18 04:05:14,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 04:05:14,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-03-18 04:05:14,602 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-03-18 04:05:14,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:14,603 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-03-18 04:05:14,603 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 04:05:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-03-18 04:05:14,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 04:05:14,605 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:14,605 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 04:05:14,605 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 04:05:14,606 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:14,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:14,607 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2022-03-18 04:05:14,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:14,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [111502421] [2022-03-18 04:05:14,609 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:14,609 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 2 times [2022-03-18 04:05:14,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:14,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202569234] [2022-03-18 04:05:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:14,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:14,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:14,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572536087] [2022-03-18 04:05:14,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:05:14,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:14,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:14,638 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 04:05:14,638 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 04:05:14,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 04:05:14,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:14,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 04:05:14,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:14,835 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 04:05:14,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 04:05:14,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:14,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202569234] [2022-03-18 04:05:14,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:14,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572536087] [2022-03-18 04:05:14,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572536087] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:14,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:14,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 04:05:14,838 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:14,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [111502421] [2022-03-18 04:05:14,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [111502421] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:14,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:14,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 04:05:14,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851132679] [2022-03-18 04:05:14,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:14,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 04:05:14,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:14,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 04:05:14,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 04:05:14,841 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 04:05:14,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:14,853 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-18 04:05:14,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 04:05:14,853 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 04:05:14,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:14,854 INFO L225 Difference]: With dead ends: 34 [2022-03-18 04:05:14,854 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 04:05:14,855 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 04:05:14,856 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:14,857 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:05:14,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 04:05:14,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-18 04:05:14,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 04:05:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-18 04:05:14,864 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2022-03-18 04:05:14,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:14,865 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-18 04:05:14,865 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 04:05:14,866 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-18 04:05:14,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 04:05:14,866 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:14,866 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 04:05:14,887 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 04:05:15,083 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 04:05:15,084 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:15,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:15,084 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2022-03-18 04:05:15,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:15,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2019266712] [2022-03-18 04:05:15,085 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:15,085 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 2 times [2022-03-18 04:05:15,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:15,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005295195] [2022-03-18 04:05:15,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:15,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:15,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:15,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955165482] [2022-03-18 04:05:15,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:05:15,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:15,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:15,099 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 04:05:15,100 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 04:05:15,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 04:05:15,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:15,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 04:05:15,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:15,215 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 04:05:15,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 04:05:15,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:15,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005295195] [2022-03-18 04:05:15,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:15,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955165482] [2022-03-18 04:05:15,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955165482] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:15,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:15,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 04:05:15,217 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:15,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2019266712] [2022-03-18 04:05:15,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2019266712] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:15,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:15,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 04:05:15,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082190563] [2022-03-18 04:05:15,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:15,218 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 04:05:15,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:15,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 04:05:15,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 04:05:15,219 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 04:05:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:15,253 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-03-18 04:05:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 04:05:15,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-18 04:05:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:15,255 INFO L225 Difference]: With dead ends: 37 [2022-03-18 04:05:15,255 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 04:05:15,256 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 04:05:15,257 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:15,257 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 88 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:05:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 04:05:15,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-03-18 04:05:15,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 04:05:15,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-03-18 04:05:15,265 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-03-18 04:05:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:15,265 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-03-18 04:05:15,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 04:05:15,265 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-03-18 04:05:15,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 04:05:15,266 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:15,266 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 04:05:15,292 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 04:05:15,487 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 04:05:15,488 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:15,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:15,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2022-03-18 04:05:15,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:15,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1755131255] [2022-03-18 04:05:15,489 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:15,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 2 times [2022-03-18 04:05:15,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:15,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927011471] [2022-03-18 04:05:15,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:15,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:15,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:15,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529766919] [2022-03-18 04:05:15,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:05:15,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:15,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:15,504 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 04:05:15,523 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 04:05:15,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:05:15,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:15,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 04:05:15,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:15,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:15,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:15,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927011471] [2022-03-18 04:05:15,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:15,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529766919] [2022-03-18 04:05:15,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529766919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:15,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:15,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-18 04:05:15,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:15,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1755131255] [2022-03-18 04:05:15,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1755131255] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:15,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:15,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 04:05:15,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431718073] [2022-03-18 04:05:15,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:15,865 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 04:05:15,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:15,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 04:05:15,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-18 04:05:15,866 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 04:05:15,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:15,947 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-03-18 04:05:15,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 04:05:15,947 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-03-18 04:05:15,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:15,949 INFO L225 Difference]: With dead ends: 39 [2022-03-18 04:05:15,949 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 04:05:15,950 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-18 04:05:15,951 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:15,951 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 113 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:05:15,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 04:05:15,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-03-18 04:05:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 04:05:15,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-03-18 04:05:15,975 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-03-18 04:05:15,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:15,976 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-03-18 04:05:15,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-18 04:05:15,976 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-03-18 04:05:15,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 04:05:15,977 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:15,977 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] [2022-03-18 04:05:15,996 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 04:05:16,187 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 04:05:16,188 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:16,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2022-03-18 04:05:16,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:16,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [591336053] [2022-03-18 04:05:16,189 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:16,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 2 times [2022-03-18 04:05:16,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:16,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917139664] [2022-03-18 04:05:16,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:16,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:16,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:16,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024044086] [2022-03-18 04:05:16,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:05:16,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:16,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:16,203 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 04:05:16,222 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 04:05:16,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:05:16,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:16,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 04:05:16,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:16,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:16,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:16,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917139664] [2022-03-18 04:05:16,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:16,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024044086] [2022-03-18 04:05:16,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024044086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:16,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:16,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-18 04:05:16,417 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:16,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [591336053] [2022-03-18 04:05:16,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [591336053] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:16,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:16,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 04:05:16,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033746597] [2022-03-18 04:05:16,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:16,418 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 04:05:16,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:16,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 04:05:16,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-18 04:05:16,419 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 04:05:16,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:16,449 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-03-18 04:05:16,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 04:05:16,450 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-03-18 04:05:16,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:16,452 INFO L225 Difference]: With dead ends: 43 [2022-03-18 04:05:16,452 INFO L226 Difference]: Without dead ends: 38 [2022-03-18 04:05:16,452 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-18 04:05:16,455 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:16,456 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 72 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:05:16,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-18 04:05:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-18 04:05:16,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 04:05:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-03-18 04:05:16,474 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2022-03-18 04:05:16,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:16,474 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-03-18 04:05:16,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 04:05:16,475 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-03-18 04:05:16,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-18 04:05:16,477 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:16,478 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:16,511 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 04:05:16,700 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 04:05:16,701 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:16,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:16,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 3 times [2022-03-18 04:05:16,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:16,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1274986164] [2022-03-18 04:05:16,702 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:16,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 4 times [2022-03-18 04:05:16,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:16,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486266203] [2022-03-18 04:05:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:16,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:16,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:16,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305361574] [2022-03-18 04:05:16,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:05:16,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:16,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:16,719 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 04:05:16,732 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 04:05:16,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:05:16,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:16,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 04:05:16,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:16,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 04:05:16,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:16,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486266203] [2022-03-18 04:05:16,969 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:16,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305361574] [2022-03-18 04:05:16,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305361574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:16,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:16,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-18 04:05:16,970 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:16,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1274986164] [2022-03-18 04:05:16,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1274986164] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:16,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:16,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 04:05:16,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29297212] [2022-03-18 04:05:16,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:16,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 04:05:16,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:16,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 04:05:16,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-18 04:05:16,971 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 04:05:17,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:17,013 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-03-18 04:05:17,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 04:05:17,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-03-18 04:05:17,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:17,014 INFO L225 Difference]: With dead ends: 52 [2022-03-18 04:05:17,014 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 04:05:17,015 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-18 04:05:17,015 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:17,016 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 86 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:05:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 04:05:17,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-18 04:05:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 04:05:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-03-18 04:05:17,024 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2022-03-18 04:05:17,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:17,024 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-03-18 04:05:17,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 04:05:17,025 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-03-18 04:05:17,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 04:05:17,025 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:17,026 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:17,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 04:05:17,231 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 04:05:17,232 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:17,232 INFO L85 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 5 times [2022-03-18 04:05:17,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:17,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [761469611] [2022-03-18 04:05:17,233 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:17,233 INFO L85 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 6 times [2022-03-18 04:05:17,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:17,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207255840] [2022-03-18 04:05:17,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:17,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:17,243 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:17,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716173618] [2022-03-18 04:05:17,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:05:17,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:17,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:17,245 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 04:05:17,246 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 04:05:17,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 04:05:17,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:17,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 04:05:17,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:17,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 04:05:17,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:17,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207255840] [2022-03-18 04:05:17,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:17,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716173618] [2022-03-18 04:05:17,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716173618] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:17,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:17,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-18 04:05:17,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:17,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [761469611] [2022-03-18 04:05:17,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [761469611] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:17,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:17,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 04:05:17,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902283157] [2022-03-18 04:05:17,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:17,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 04:05:17,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:17,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 04:05:17,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-18 04:05:17,547 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 04:05:17,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:17,598 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-03-18 04:05:17,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 04:05:17,599 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2022-03-18 04:05:17,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:17,600 INFO L225 Difference]: With dead ends: 61 [2022-03-18 04:05:17,600 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 04:05:17,600 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-18 04:05:17,601 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:17,601 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 88 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:05:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 04:05:17,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-18 04:05:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 04:05:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-03-18 04:05:17,610 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2022-03-18 04:05:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:17,611 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-03-18 04:05:17,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 04:05:17,611 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-03-18 04:05:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 04:05:17,612 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:17,612 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:17,637 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 04:05:17,835 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 04:05:17,835 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:17,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:17,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 7 times [2022-03-18 04:05:17,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:17,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [835317271] [2022-03-18 04:05:17,836 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:17,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 8 times [2022-03-18 04:05:17,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:17,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557435046] [2022-03-18 04:05:17,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:17,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:17,847 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:17,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181974079] [2022-03-18 04:05:17,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:05:17,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:17,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:17,849 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 04:05:17,856 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 04:05:17,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:05:17,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:17,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 04:05:17,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:18,039 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:18,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 04:05:18,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:18,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557435046] [2022-03-18 04:05:18,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:18,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181974079] [2022-03-18 04:05:18,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181974079] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:18,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:18,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-18 04:05:18,207 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:18,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [835317271] [2022-03-18 04:05:18,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [835317271] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:18,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:18,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 04:05:18,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380067699] [2022-03-18 04:05:18,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:18,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 04:05:18,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:18,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 04:05:18,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 04:05:18,209 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-18 04:05:18,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:18,277 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-03-18 04:05:18,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 04:05:18,278 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2022-03-18 04:05:18,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:18,282 INFO L225 Difference]: With dead ends: 70 [2022-03-18 04:05:18,282 INFO L226 Difference]: Without dead ends: 65 [2022-03-18 04:05:18,282 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-18 04:05:18,283 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 25 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:18,283 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 102 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:05:18,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-18 04:05:18,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-18 04:05:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 04:05:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-03-18 04:05:18,316 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2022-03-18 04:05:18,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:18,316 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-03-18 04:05:18,317 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), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-18 04:05:18,317 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-03-18 04:05:18,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 04:05:18,318 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:18,319 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:18,345 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 04:05:18,534 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 04:05:18,534 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:18,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:18,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 9 times [2022-03-18 04:05:18,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:18,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1881764202] [2022-03-18 04:05:18,535 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:18,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 10 times [2022-03-18 04:05:18,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:18,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834040683] [2022-03-18 04:05:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:18,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:18,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:18,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855612099] [2022-03-18 04:05:18,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:05:18,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:18,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:18,548 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 04:05:18,569 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 04:05:18,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:05:18,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:18,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-18 04:05:18,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:18,744 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:18,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 04:05:18,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:18,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834040683] [2022-03-18 04:05:18,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:18,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855612099] [2022-03-18 04:05:18,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855612099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:18,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:18,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-18 04:05:18,917 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:18,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1881764202] [2022-03-18 04:05:18,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1881764202] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:18,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:18,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 04:05:18,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234017011] [2022-03-18 04:05:18,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:18,918 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 04:05:18,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:18,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 04:05:18,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-18 04:05:18,919 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-18 04:05:18,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:18,991 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-03-18 04:05:18,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 04:05:18,992 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2022-03-18 04:05:18,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:18,993 INFO L225 Difference]: With dead ends: 79 [2022-03-18 04:05:18,993 INFO L226 Difference]: Without dead ends: 74 [2022-03-18 04:05:18,994 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-03-18 04:05:18,996 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:18,996 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 122 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:05:18,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-18 04:05:19,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-18 04:05:19,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 04:05:19,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2022-03-18 04:05:19,012 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2022-03-18 04:05:19,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:19,012 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2022-03-18 04:05:19,012 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-18 04:05:19,012 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2022-03-18 04:05:19,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-18 04:05:19,017 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:19,017 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:19,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 04:05:19,235 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 04:05:19,235 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:19,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:19,236 INFO L85 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 11 times [2022-03-18 04:05:19,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:19,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2126460379] [2022-03-18 04:05:19,236 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:19,236 INFO L85 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 12 times [2022-03-18 04:05:19,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:19,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422587672] [2022-03-18 04:05:19,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:19,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:19,245 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:19,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1454120426] [2022-03-18 04:05:19,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:05:19,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:19,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:19,247 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 04:05:19,248 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 04:05:19,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 04:05:19,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:19,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 04:05:19,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:19,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 04:05:19,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:19,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422587672] [2022-03-18 04:05:19,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:19,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454120426] [2022-03-18 04:05:19,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454120426] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:19,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:19,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-18 04:05:19,663 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:19,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2126460379] [2022-03-18 04:05:19,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2126460379] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:19,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:19,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 04:05:19,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458469490] [2022-03-18 04:05:19,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:19,663 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 04:05:19,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:19,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 04:05:19,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-18 04:05:19,664 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-18 04:05:19,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:19,748 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-03-18 04:05:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 04:05:19,748 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2022-03-18 04:05:19,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:19,749 INFO L225 Difference]: With dead ends: 88 [2022-03-18 04:05:19,749 INFO L226 Difference]: Without dead ends: 83 [2022-03-18 04:05:19,750 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-03-18 04:05:19,750 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:19,750 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 124 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:05:19,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-18 04:05:19,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-18 04:05:19,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 04:05:19,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-03-18 04:05:19,759 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2022-03-18 04:05:19,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:19,760 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-03-18 04:05:19,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-18 04:05:19,760 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-03-18 04:05:19,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-18 04:05:19,760 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:19,761 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:19,791 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 04:05:19,975 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 04:05:19,975 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:19,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:19,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 13 times [2022-03-18 04:05:19,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:19,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1907792064] [2022-03-18 04:05:19,976 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:19,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 14 times [2022-03-18 04:05:19,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:19,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050388796] [2022-03-18 04:05:19,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:19,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:19,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:19,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896300429] [2022-03-18 04:05:19,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:05:19,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:19,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:19,988 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 04:05:19,990 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 04:05:20,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:05:20,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:20,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 04:05:20,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:20,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 04:05:20,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:20,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050388796] [2022-03-18 04:05:20,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:20,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896300429] [2022-03-18 04:05:20,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896300429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:20,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:20,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-18 04:05:20,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:20,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1907792064] [2022-03-18 04:05:20,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1907792064] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:20,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:20,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 04:05:20,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099673154] [2022-03-18 04:05:20,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:20,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 04:05:20,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:20,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 04:05:20,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-18 04:05:20,511 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-18 04:05:20,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:20,604 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-03-18 04:05:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 04:05:20,605 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2022-03-18 04:05:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:20,606 INFO L225 Difference]: With dead ends: 97 [2022-03-18 04:05:20,606 INFO L226 Difference]: Without dead ends: 92 [2022-03-18 04:05:20,606 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2022-03-18 04:05:20,607 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 30 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:20,607 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 132 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 04:05:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-18 04:05:20,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-03-18 04:05:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 04:05:20,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2022-03-18 04:05:20,621 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2022-03-18 04:05:20,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:20,621 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2022-03-18 04:05:20,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-18 04:05:20,621 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2022-03-18 04:05:20,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-18 04:05:20,626 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:20,626 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:20,652 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 04:05:20,839 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 04:05:20,839 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:20,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:20,840 INFO L85 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 15 times [2022-03-18 04:05:20,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:20,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1920685521] [2022-03-18 04:05:20,840 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:20,841 INFO L85 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 16 times [2022-03-18 04:05:20,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:20,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53461107] [2022-03-18 04:05:20,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:20,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:20,850 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:20,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081785370] [2022-03-18 04:05:20,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:05:20,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:20,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:20,861 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 04:05:20,863 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 04:05:20,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:05:20,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:20,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-18 04:05:20,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:21,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-18 04:05:21,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:21,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53461107] [2022-03-18 04:05:21,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:21,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081785370] [2022-03-18 04:05:21,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081785370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:21,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:21,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-18 04:05:21,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:21,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1920685521] [2022-03-18 04:05:21,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1920685521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:21,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:21,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 04:05:21,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029964093] [2022-03-18 04:05:21,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:21,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 04:05:21,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:21,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 04:05:21,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-18 04:05:21,407 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-18 04:05:21,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:21,525 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2022-03-18 04:05:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 04:05:21,525 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2022-03-18 04:05:21,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:21,526 INFO L225 Difference]: With dead ends: 106 [2022-03-18 04:05:21,526 INFO L226 Difference]: Without dead ends: 101 [2022-03-18 04:05:21,527 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=507, Unknown=0, NotChecked=0, Total=870 [2022-03-18 04:05:21,527 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 27 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:21,527 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 146 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:21,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-18 04:05:21,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-18 04:05:21,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 04:05:21,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-03-18 04:05:21,536 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2022-03-18 04:05:21,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:21,536 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-03-18 04:05:21,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-18 04:05:21,536 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-03-18 04:05:21,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 04:05:21,537 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:21,537 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:21,559 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 04:05:21,752 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 04:05:21,753 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:21,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 17 times [2022-03-18 04:05:21,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:21,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [828411648] [2022-03-18 04:05:21,753 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:21,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 18 times [2022-03-18 04:05:21,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:21,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23884776] [2022-03-18 04:05:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:21,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:21,776 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:21,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622325862] [2022-03-18 04:05:21,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:05:21,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:21,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:21,779 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 04:05:21,780 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 04:05:21,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-18 04:05:21,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:21,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 04:05:21,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:22,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 198 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-18 04:05:22,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:22,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23884776] [2022-03-18 04:05:22,428 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:22,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622325862] [2022-03-18 04:05:22,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622325862] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:22,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:22,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-18 04:05:22,428 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:22,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [828411648] [2022-03-18 04:05:22,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [828411648] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:22,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:22,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 04:05:22,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056671778] [2022-03-18 04:05:22,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:22,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 04:05:22,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:22,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 04:05:22,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-18 04:05:22,430 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-18 04:05:22,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:22,558 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2022-03-18 04:05:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 04:05:22,558 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2022-03-18 04:05:22,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:22,559 INFO L225 Difference]: With dead ends: 115 [2022-03-18 04:05:22,560 INFO L226 Difference]: Without dead ends: 110 [2022-03-18 04:05:22,560 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 04:05:22,561 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 37 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:22,561 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 148 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:22,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-18 04:05:22,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-18 04:05:22,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 04:05:22,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-03-18 04:05:22,570 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2022-03-18 04:05:22,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:22,570 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-03-18 04:05:22,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-18 04:05:22,570 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-03-18 04:05:22,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-18 04:05:22,571 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:22,571 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:22,599 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 04:05:22,787 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 04:05:22,787 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:22,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:22,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 19 times [2022-03-18 04:05:22,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:22,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [823251934] [2022-03-18 04:05:22,789 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:22,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 20 times [2022-03-18 04:05:22,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:22,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093732627] [2022-03-18 04:05:22,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:22,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:22,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:22,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [167385494] [2022-03-18 04:05:22,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:05:22,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:22,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:22,800 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 04:05:22,823 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 04:05:22,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:05:22,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:22,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 04:05:22,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:23,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 04:05:23,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:23,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093732627] [2022-03-18 04:05:23,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:23,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167385494] [2022-03-18 04:05:23,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167385494] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:23,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:23,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-18 04:05:23,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:23,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [823251934] [2022-03-18 04:05:23,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [823251934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:23,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:23,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 04:05:23,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823101883] [2022-03-18 04:05:23,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:23,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 04:05:23,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:23,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 04:05:23,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-18 04:05:23,439 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-18 04:05:23,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:23,584 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2022-03-18 04:05:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 04:05:23,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 113 [2022-03-18 04:05:23,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:23,586 INFO L225 Difference]: With dead ends: 124 [2022-03-18 04:05:23,586 INFO L226 Difference]: Without dead ends: 119 [2022-03-18 04:05:23,587 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=531, Invalid=729, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 04:05:23,587 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 29 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:23,588 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 156 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:23,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-18 04:05:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-03-18 04:05:23,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 04:05:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2022-03-18 04:05:23,597 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 113 [2022-03-18 04:05:23,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:23,598 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2022-03-18 04:05:23,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-18 04:05:23,598 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2022-03-18 04:05:23,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-18 04:05:23,599 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:23,599 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:23,627 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 04:05:23,827 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 04:05:23,828 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:23,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:23,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1999651676, now seen corresponding path program 21 times [2022-03-18 04:05:23,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:23,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1832376632] [2022-03-18 04:05:23,829 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:23,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1999651676, now seen corresponding path program 22 times [2022-03-18 04:05:23,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:23,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596880219] [2022-03-18 04:05:23,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:23,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:23,866 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:23,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666240427] [2022-03-18 04:05:23,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:05:23,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:23,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:23,869 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 04:05:23,898 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 04:05:23,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:05:23,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:23,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 04:05:23,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 517 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:24,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 297 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-18 04:05:24,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:24,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596880219] [2022-03-18 04:05:24,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:24,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666240427] [2022-03-18 04:05:24,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666240427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:24,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:24,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-18 04:05:24,574 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:24,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1832376632] [2022-03-18 04:05:24,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1832376632] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:24,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:24,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 04:05:24,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428646636] [2022-03-18 04:05:24,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:24,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 04:05:24,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:24,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 04:05:24,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-18 04:05:24,576 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-18 04:05:24,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:24,721 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2022-03-18 04:05:24,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 04:05:24,722 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 122 [2022-03-18 04:05:24,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:24,723 INFO L225 Difference]: With dead ends: 133 [2022-03-18 04:05:24,723 INFO L226 Difference]: Without dead ends: 128 [2022-03-18 04:05:24,724 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=627, Invalid=855, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 04:05:24,724 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 41 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:24,724 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 158 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:24,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-18 04:05:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-03-18 04:05:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 04:05:24,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2022-03-18 04:05:24,734 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 122 [2022-03-18 04:05:24,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:24,735 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2022-03-18 04:05:24,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-18 04:05:24,735 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2022-03-18 04:05:24,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-18 04:05:24,736 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:24,736 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:24,760 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 04:05:24,949 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 04:05:24,949 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:24,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:24,950 INFO L85 PathProgramCache]: Analyzing trace with hash 881443734, now seen corresponding path program 23 times [2022-03-18 04:05:24,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:24,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [488832635] [2022-03-18 04:05:24,951 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:24,951 INFO L85 PathProgramCache]: Analyzing trace with hash 881443734, now seen corresponding path program 24 times [2022-03-18 04:05:24,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:24,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355357203] [2022-03-18 04:05:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:24,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:24,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:24,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882382323] [2022-03-18 04:05:24,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:05:24,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:24,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:24,966 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 04:05:24,968 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 04:05:25,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-18 04:05:25,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:25,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-18 04:05:25,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 618 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:25,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 354 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-18 04:05:25,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:25,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355357203] [2022-03-18 04:05:25,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:25,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882382323] [2022-03-18 04:05:25,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882382323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:25,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:25,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-18 04:05:25,804 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:25,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [488832635] [2022-03-18 04:05:25,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [488832635] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:25,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:25,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 04:05:25,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988796147] [2022-03-18 04:05:25,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:25,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 04:05:25,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:25,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 04:05:25,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-18 04:05:25,805 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-18 04:05:25,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:25,985 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2022-03-18 04:05:25,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 04:05:25,985 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 131 [2022-03-18 04:05:25,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:25,986 INFO L225 Difference]: With dead ends: 142 [2022-03-18 04:05:25,986 INFO L226 Difference]: Without dead ends: 137 [2022-03-18 04:05:25,987 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=731, Invalid=991, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 04:05:25,988 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 58 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:25,988 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 172 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:25,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-18 04:05:25,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-18 04:05:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 04:05:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2022-03-18 04:05:25,998 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 131 [2022-03-18 04:05:25,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:25,999 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2022-03-18 04:05:25,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-18 04:05:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2022-03-18 04:05:26,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-18 04:05:26,000 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:26,000 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:26,023 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 04:05:26,213 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 04:05:26,213 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:26,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2089018524, now seen corresponding path program 25 times [2022-03-18 04:05:26,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:26,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [583105796] [2022-03-18 04:05:26,214 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:26,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2089018524, now seen corresponding path program 26 times [2022-03-18 04:05:26,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:26,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730061329] [2022-03-18 04:05:26,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:26,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:26,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:26,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537983383] [2022-03-18 04:05:26,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:05:26,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:26,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:26,225 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 04:05:26,247 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 04:05:26,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:05:26,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:26,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 04:05:26,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 728 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:26,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 416 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-18 04:05:27,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:27,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730061329] [2022-03-18 04:05:27,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:27,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537983383] [2022-03-18 04:05:27,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537983383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:27,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:27,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-18 04:05:27,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:27,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [583105796] [2022-03-18 04:05:27,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [583105796] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:27,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:27,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 04:05:27,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644631714] [2022-03-18 04:05:27,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:27,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 04:05:27,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:27,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 04:05:27,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-18 04:05:27,051 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-18 04:05:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:27,257 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2022-03-18 04:05:27,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 04:05:27,257 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 140 [2022-03-18 04:05:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:27,258 INFO L225 Difference]: With dead ends: 151 [2022-03-18 04:05:27,258 INFO L226 Difference]: Without dead ends: 146 [2022-03-18 04:05:27,259 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=843, Invalid=1137, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 04:05:27,260 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 48 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:27,260 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 174 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:27,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-18 04:05:27,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-03-18 04:05:27,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 110 states have internal predecessors, (125), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 04:05:27,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2022-03-18 04:05:27,282 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 140 [2022-03-18 04:05:27,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:27,283 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2022-03-18 04:05:27,284 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-18 04:05:27,284 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2022-03-18 04:05:27,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-18 04:05:27,285 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:27,285 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:27,303 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 04:05:27,491 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 04:05:27,491 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:27,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:27,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1088976298, now seen corresponding path program 27 times [2022-03-18 04:05:27,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:27,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2076135691] [2022-03-18 04:05:27,492 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:27,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1088976298, now seen corresponding path program 28 times [2022-03-18 04:05:27,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:27,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021685603] [2022-03-18 04:05:27,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:27,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:27,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:27,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603161067] [2022-03-18 04:05:27,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:05:27,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:27,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:27,504 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 04:05:27,507 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 04:05:27,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:05:27,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:27,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 04:05:27,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 847 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:27,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 483 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-18 04:05:28,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:28,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021685603] [2022-03-18 04:05:28,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:28,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603161067] [2022-03-18 04:05:28,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603161067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:28,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:28,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-18 04:05:28,304 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:28,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2076135691] [2022-03-18 04:05:28,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2076135691] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:28,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:28,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-18 04:05:28,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449877044] [2022-03-18 04:05:28,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:28,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-18 04:05:28,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:28,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-18 04:05:28,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 04:05:28,306 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-18 04:05:28,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:28,515 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-03-18 04:05:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 04:05:28,516 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 149 [2022-03-18 04:05:28,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:28,517 INFO L225 Difference]: With dead ends: 160 [2022-03-18 04:05:28,519 INFO L226 Difference]: Without dead ends: 155 [2022-03-18 04:05:28,520 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=963, Invalid=1293, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 04:05:28,520 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 58 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:28,521 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 194 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:28,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-18 04:05:28,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-03-18 04:05:28,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 04:05:28,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2022-03-18 04:05:28,535 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 149 [2022-03-18 04:05:28,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:28,536 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2022-03-18 04:05:28,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-18 04:05:28,537 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2022-03-18 04:05:28,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-18 04:05:28,538 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:28,538 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:28,564 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 04:05:28,759 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 04:05:28,759 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:28,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:28,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2060864036, now seen corresponding path program 29 times [2022-03-18 04:05:28,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:28,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [134198416] [2022-03-18 04:05:28,760 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:28,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2060864036, now seen corresponding path program 30 times [2022-03-18 04:05:28,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:28,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698260917] [2022-03-18 04:05:28,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:28,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:28,768 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:28,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144159185] [2022-03-18 04:05:28,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:05:28,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:28,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:28,769 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 04:05:28,771 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 04:05:28,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-18 04:05:28,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:28,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 04:05:28,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:29,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 555 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-18 04:05:29,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:29,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698260917] [2022-03-18 04:05:29,691 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:29,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144159185] [2022-03-18 04:05:29,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144159185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:29,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:29,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-18 04:05:29,692 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:29,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [134198416] [2022-03-18 04:05:29,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [134198416] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:29,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:29,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-18 04:05:29,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094119892] [2022-03-18 04:05:29,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:29,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-18 04:05:29,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:29,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-18 04:05:29,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 04:05:29,694 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-18 04:05:29,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:29,930 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2022-03-18 04:05:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 04:05:29,931 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 158 [2022-03-18 04:05:29,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:29,932 INFO L225 Difference]: With dead ends: 169 [2022-03-18 04:05:29,932 INFO L226 Difference]: Without dead ends: 164 [2022-03-18 04:05:29,933 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=1459, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 04:05:29,933 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 48 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:29,934 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 208 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-18 04:05:29,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-03-18 04:05:29,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-18 04:05:29,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 181 transitions. [2022-03-18 04:05:29,946 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 181 transitions. Word has length 158 [2022-03-18 04:05:29,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:29,946 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 181 transitions. [2022-03-18 04:05:29,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-18 04:05:29,946 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 181 transitions. [2022-03-18 04:05:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-18 04:05:29,948 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:29,948 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:29,968 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 04:05:30,163 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 04:05:30,163 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:30,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:30,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1479991018, now seen corresponding path program 31 times [2022-03-18 04:05:30,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:30,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [363512586] [2022-03-18 04:05:30,164 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:30,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1479991018, now seen corresponding path program 32 times [2022-03-18 04:05:30,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:30,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883770557] [2022-03-18 04:05:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:30,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:30,174 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:30,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253034738] [2022-03-18 04:05:30,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:05:30,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:30,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:30,175 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 04:05:30,202 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 04:05:30,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:05:30,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:30,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-18 04:05:30,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:30,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 1112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:30,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 632 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-18 04:05:31,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:31,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883770557] [2022-03-18 04:05:31,188 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:31,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253034738] [2022-03-18 04:05:31,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253034738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:31,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:31,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-18 04:05:31,189 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:31,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [363512586] [2022-03-18 04:05:31,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [363512586] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:31,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:31,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 04:05:31,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762465635] [2022-03-18 04:05:31,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:31,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 04:05:31,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:31,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 04:05:31,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 04:05:31,190 INFO L87 Difference]: Start difference. First operand 164 states and 181 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-18 04:05:31,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:31,406 INFO L93 Difference]: Finished difference Result 178 states and 196 transitions. [2022-03-18 04:05:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 04:05:31,407 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 167 [2022-03-18 04:05:31,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:31,407 INFO L225 Difference]: With dead ends: 178 [2022-03-18 04:05:31,407 INFO L226 Difference]: Without dead ends: 173 [2022-03-18 04:05:31,408 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1227, Invalid=1635, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 04:05:31,409 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:31,409 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 228 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-18 04:05:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-18 04:05:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-18 04:05:31,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2022-03-18 04:05:31,422 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 167 [2022-03-18 04:05:31,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:31,422 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2022-03-18 04:05:31,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-18 04:05:31,423 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2022-03-18 04:05:31,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-18 04:05:31,424 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:31,424 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:31,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-18 04:05:31,651 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 04:05:31,651 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:31,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:31,651 INFO L85 PathProgramCache]: Analyzing trace with hash 318093084, now seen corresponding path program 33 times [2022-03-18 04:05:31,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:31,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [321655543] [2022-03-18 04:05:31,652 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:31,652 INFO L85 PathProgramCache]: Analyzing trace with hash 318093084, now seen corresponding path program 34 times [2022-03-18 04:05:31,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:31,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510882105] [2022-03-18 04:05:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:31,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:31,659 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:31,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119501129] [2022-03-18 04:05:31,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:05:31,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:31,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:31,661 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 04:05:31,668 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 04:05:31,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:05:31,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:31,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 04:05:31,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 1258 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:32,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 714 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-18 04:05:32,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:32,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510882105] [2022-03-18 04:05:32,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:32,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119501129] [2022-03-18 04:05:32,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119501129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:32,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:32,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-18 04:05:32,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:32,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [321655543] [2022-03-18 04:05:32,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [321655543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:32,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:32,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-18 04:05:32,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833033211] [2022-03-18 04:05:32,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:32,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 04:05:32,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:32,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 04:05:32,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 04:05:32,698 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-18 04:05:32,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:32,919 INFO L93 Difference]: Finished difference Result 187 states and 206 transitions. [2022-03-18 04:05:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 04:05:32,920 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 176 [2022-03-18 04:05:32,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:32,921 INFO L225 Difference]: With dead ends: 187 [2022-03-18 04:05:32,921 INFO L226 Difference]: Without dead ends: 182 [2022-03-18 04:05:32,922 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1371, Invalid=1821, Unknown=0, NotChecked=0, Total=3192 [2022-03-18 04:05:32,923 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 51 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:32,923 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 224 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:32,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-18 04:05:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-03-18 04:05:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-18 04:05:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2022-03-18 04:05:32,936 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 176 [2022-03-18 04:05:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:32,936 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2022-03-18 04:05:32,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-18 04:05:32,937 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2022-03-18 04:05:32,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-18 04:05:32,938 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:32,938 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:32,959 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 04:05:33,155 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 04:05:33,155 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:33,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:33,156 INFO L85 PathProgramCache]: Analyzing trace with hash 994740182, now seen corresponding path program 35 times [2022-03-18 04:05:33,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:33,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1133232038] [2022-03-18 04:05:33,156 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:33,156 INFO L85 PathProgramCache]: Analyzing trace with hash 994740182, now seen corresponding path program 36 times [2022-03-18 04:05:33,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:33,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677777262] [2022-03-18 04:05:33,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:33,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:33,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:33,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144807026] [2022-03-18 04:05:33,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:05:33,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:33,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:33,167 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 04:05:33,169 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 04:05:33,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-18 04:05:33,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:33,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 04:05:33,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 1413 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:33,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 801 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-18 04:05:34,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:34,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677777262] [2022-03-18 04:05:34,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:34,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144807026] [2022-03-18 04:05:34,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144807026] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:34,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:34,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-18 04:05:34,390 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:34,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1133232038] [2022-03-18 04:05:34,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1133232038] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:34,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:34,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-18 04:05:34,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054529205] [2022-03-18 04:05:34,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:34,391 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 04:05:34,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:34,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 04:05:34,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 04:05:34,392 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-18 04:05:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:34,637 INFO L93 Difference]: Finished difference Result 196 states and 216 transitions. [2022-03-18 04:05:34,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 04:05:34,638 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 185 [2022-03-18 04:05:34,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:34,639 INFO L225 Difference]: With dead ends: 196 [2022-03-18 04:05:34,639 INFO L226 Difference]: Without dead ends: 191 [2022-03-18 04:05:34,640 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1523, Invalid=2017, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 04:05:34,641 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 64 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:34,641 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 220 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:34,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-18 04:05:34,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-03-18 04:05:34,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 states have internal predecessors, (165), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-18 04:05:34,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2022-03-18 04:05:34,654 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 185 [2022-03-18 04:05:34,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:34,654 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2022-03-18 04:05:34,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-18 04:05:34,655 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2022-03-18 04:05:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-03-18 04:05:34,656 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:34,656 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:34,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-18 04:05:34,863 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 04:05:34,863 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:34,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:34,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1522264156, now seen corresponding path program 37 times [2022-03-18 04:05:34,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:34,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [537540273] [2022-03-18 04:05:34,864 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:34,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1522264156, now seen corresponding path program 38 times [2022-03-18 04:05:34,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:34,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415752291] [2022-03-18 04:05:34,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:34,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:34,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:34,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400256303] [2022-03-18 04:05:34,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:05:34,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:34,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:34,875 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 04:05:34,876 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 04:05:34,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:05:34,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:34,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 04:05:34,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 1577 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:35,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 893 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-18 04:05:36,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:36,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415752291] [2022-03-18 04:05:36,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:36,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400256303] [2022-03-18 04:05:36,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400256303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:36,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:36,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-18 04:05:36,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:36,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [537540273] [2022-03-18 04:05:36,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [537540273] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:36,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:36,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-18 04:05:36,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228819571] [2022-03-18 04:05:36,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:36,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 04:05:36,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:36,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 04:05:36,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 04:05:36,061 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-18 04:05:36,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:36,353 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2022-03-18 04:05:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 04:05:36,354 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 194 [2022-03-18 04:05:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:36,355 INFO L225 Difference]: With dead ends: 205 [2022-03-18 04:05:36,355 INFO L226 Difference]: Without dead ends: 200 [2022-03-18 04:05:36,356 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2223, Unknown=0, NotChecked=0, Total=3906 [2022-03-18 04:05:36,356 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 66 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:36,357 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 234 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:36,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-18 04:05:36,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-03-18 04:05:36,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.138157894736842) internal successors, (173), 152 states have internal predecessors, (173), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-18 04:05:36,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2022-03-18 04:05:36,370 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 194 [2022-03-18 04:05:36,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:36,371 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2022-03-18 04:05:36,371 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-18 04:05:36,371 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2022-03-18 04:05:36,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-18 04:05:36,372 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:36,372 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:36,391 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 04:05:36,583 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 04:05:36,583 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:36,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1934081686, now seen corresponding path program 39 times [2022-03-18 04:05:36,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:36,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [831634345] [2022-03-18 04:05:36,584 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1934081686, now seen corresponding path program 40 times [2022-03-18 04:05:36,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:36,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179054073] [2022-03-18 04:05:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:36,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:36,603 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:36,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261731918] [2022-03-18 04:05:36,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:05:36,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:36,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:36,607 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 04:05:36,620 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 04:05:36,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:05:36,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:36,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 04:05:36,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:37,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 40 proven. 1750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:37,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 40 proven. 990 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-03-18 04:05:37,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:37,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179054073] [2022-03-18 04:05:37,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:37,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261731918] [2022-03-18 04:05:37,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261731918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:37,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:37,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-18 04:05:37,847 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:37,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [831634345] [2022-03-18 04:05:37,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [831634345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:37,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:37,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 04:05:37,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959104719] [2022-03-18 04:05:37,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:37,848 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 04:05:37,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 04:05:37,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 04:05:37,849 INFO L87 Difference]: Start difference. First operand 200 states and 221 transitions. Second operand has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-18 04:05:38,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:38,144 INFO L93 Difference]: Finished difference Result 214 states and 236 transitions. [2022-03-18 04:05:38,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 04:05:38,145 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) Word has length 203 [2022-03-18 04:05:38,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:38,146 INFO L225 Difference]: With dead ends: 214 [2022-03-18 04:05:38,146 INFO L226 Difference]: Without dead ends: 209 [2022-03-18 04:05:38,147 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1851, Invalid=2439, Unknown=0, NotChecked=0, Total=4290 [2022-03-18 04:05:38,148 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 92 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:38,148 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 224 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:38,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-18 04:05:38,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-03-18 04:05:38,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 159 states have (on average 1.1383647798742138) internal successors, (181), 159 states have internal predecessors, (181), 26 states have call successors, (26), 25 states have call predecessors, (26), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 04:05:38,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 231 transitions. [2022-03-18 04:05:38,161 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 231 transitions. Word has length 203 [2022-03-18 04:05:38,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:38,161 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 231 transitions. [2022-03-18 04:05:38,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-18 04:05:38,162 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 231 transitions. [2022-03-18 04:05:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-18 04:05:38,163 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:38,163 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:38,186 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 04:05:38,386 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 04:05:38,386 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:38,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:38,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2075113060, now seen corresponding path program 41 times [2022-03-18 04:05:38,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:38,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [9983359] [2022-03-18 04:05:38,387 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:38,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2075113060, now seen corresponding path program 42 times [2022-03-18 04:05:38,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:38,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274257949] [2022-03-18 04:05:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:38,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:38,395 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:38,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034899341] [2022-03-18 04:05:38,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:05:38,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:38,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:38,397 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 04:05:38,399 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 04:05:38,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-18 04:05:38,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:38,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-18 04:05:38,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 42 proven. 1932 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:39,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 42 proven. 1092 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-18 04:05:39,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:39,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274257949] [2022-03-18 04:05:39,777 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:39,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034899341] [2022-03-18 04:05:39,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034899341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:39,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:39,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-18 04:05:39,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:39,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [9983359] [2022-03-18 04:05:39,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [9983359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:39,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:39,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-18 04:05:39,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471695243] [2022-03-18 04:05:39,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:39,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 04:05:39,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:39,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 04:05:39,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 04:05:39,779 INFO L87 Difference]: Start difference. First operand 209 states and 231 transitions. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-18 04:05:40,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:40,134 INFO L93 Difference]: Finished difference Result 223 states and 246 transitions. [2022-03-18 04:05:40,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 04:05:40,135 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 212 [2022-03-18 04:05:40,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:40,136 INFO L225 Difference]: With dead ends: 223 [2022-03-18 04:05:40,136 INFO L226 Difference]: Without dead ends: 218 [2022-03-18 04:05:40,138 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2027, Invalid=2665, Unknown=0, NotChecked=0, Total=4692 [2022-03-18 04:05:40,138 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 122 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:40,139 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 238 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:40,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-18 04:05:40,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-03-18 04:05:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-18 04:05:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 241 transitions. [2022-03-18 04:05:40,162 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 241 transitions. Word has length 212 [2022-03-18 04:05:40,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:40,163 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 241 transitions. [2022-03-18 04:05:40,163 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-18 04:05:40,164 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 241 transitions. [2022-03-18 04:05:40,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-03-18 04:05:40,165 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:40,165 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:40,191 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 04:05:40,387 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 04:05:40,388 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:40,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1234385578, now seen corresponding path program 43 times [2022-03-18 04:05:40,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:40,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [64440553] [2022-03-18 04:05:40,389 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:40,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1234385578, now seen corresponding path program 44 times [2022-03-18 04:05:40,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:40,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548138971] [2022-03-18 04:05:40,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:40,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:40,398 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:40,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518323773] [2022-03-18 04:05:40,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:05:40,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:40,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:40,400 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 04:05:40,401 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 04:05:40,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:05:40,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:40,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-18 04:05:40,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:41,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-03-18 04:05:41,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:41,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548138971] [2022-03-18 04:05:41,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:41,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518323773] [2022-03-18 04:05:41,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518323773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:41,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:41,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-18 04:05:41,877 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:41,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [64440553] [2022-03-18 04:05:41,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [64440553] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:41,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:41,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-18 04:05:41,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590496631] [2022-03-18 04:05:41,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:41,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 04:05:41,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:41,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 04:05:41,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 04:05:41,879 INFO L87 Difference]: Start difference. First operand 218 states and 241 transitions. Second operand has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-18 04:05:42,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:42,206 INFO L93 Difference]: Finished difference Result 232 states and 256 transitions. [2022-03-18 04:05:42,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-18 04:05:42,207 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) Word has length 221 [2022-03-18 04:05:42,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:42,208 INFO L225 Difference]: With dead ends: 232 [2022-03-18 04:05:42,208 INFO L226 Difference]: Without dead ends: 227 [2022-03-18 04:05:42,210 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2901, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 04:05:42,210 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 68 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:42,210 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 264 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:42,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-18 04:05:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-03-18 04:05:42,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 173 states have (on average 1.138728323699422) internal successors, (197), 173 states have internal predecessors, (197), 28 states have call successors, (28), 27 states have call predecessors, (28), 25 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-18 04:05:42,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 251 transitions. [2022-03-18 04:05:42,226 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 251 transitions. Word has length 221 [2022-03-18 04:05:42,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:42,227 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 251 transitions. [2022-03-18 04:05:42,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-18 04:05:42,227 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 251 transitions. [2022-03-18 04:05:42,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-03-18 04:05:42,228 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:42,228 INFO L500 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:42,252 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 04:05:42,442 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 04:05:42,442 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:42,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:42,443 INFO L85 PathProgramCache]: Analyzing trace with hash -360260900, now seen corresponding path program 45 times [2022-03-18 04:05:42,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:42,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [517566778] [2022-03-18 04:05:42,443 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:42,443 INFO L85 PathProgramCache]: Analyzing trace with hash -360260900, now seen corresponding path program 46 times [2022-03-18 04:05:42,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:42,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3859153] [2022-03-18 04:05:42,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:42,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:42,466 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:42,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685456346] [2022-03-18 04:05:42,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:05:42,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:42,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:42,467 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 04:05:42,502 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 04:05:42,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:05:42,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:42,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-18 04:05:42,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 46 proven. 2323 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:43,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 46 proven. 1311 refuted. 0 times theorem prover too weak. 1016 trivial. 0 not checked. [2022-03-18 04:05:44,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:44,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3859153] [2022-03-18 04:05:44,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:44,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685456346] [2022-03-18 04:05:44,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685456346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:44,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:44,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-03-18 04:05:44,020 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:44,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [517566778] [2022-03-18 04:05:44,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [517566778] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:44,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:44,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-18 04:05:44,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103989482] [2022-03-18 04:05:44,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:44,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 04:05:44,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 04:05:44,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2022-03-18 04:05:44,022 INFO L87 Difference]: Start difference. First operand 227 states and 251 transitions. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-18 04:05:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:44,366 INFO L93 Difference]: Finished difference Result 241 states and 266 transitions. [2022-03-18 04:05:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-18 04:05:44,367 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) Word has length 230 [2022-03-18 04:05:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:44,368 INFO L225 Difference]: With dead ends: 241 [2022-03-18 04:05:44,368 INFO L226 Difference]: Without dead ends: 236 [2022-03-18 04:05:44,369 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2403, Invalid=3147, Unknown=0, NotChecked=0, Total=5550 [2022-03-18 04:05:44,369 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 73 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:44,370 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 284 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:44,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-18 04:05:44,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-03-18 04:05:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 180 states have (on average 1.1388888888888888) internal successors, (205), 180 states have internal predecessors, (205), 29 states have call successors, (29), 28 states have call predecessors, (29), 26 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-18 04:05:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 261 transitions. [2022-03-18 04:05:44,386 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 261 transitions. Word has length 230 [2022-03-18 04:05:44,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:44,386 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 261 transitions. [2022-03-18 04:05:44,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-18 04:05:44,387 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 261 transitions. [2022-03-18 04:05:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-18 04:05:44,388 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:44,388 INFO L500 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:44,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 04:05:44,599 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 04:05:44,599 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:44,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:44,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1738171370, now seen corresponding path program 47 times [2022-03-18 04:05:44,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:44,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [914048881] [2022-03-18 04:05:44,600 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:44,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1738171370, now seen corresponding path program 48 times [2022-03-18 04:05:44,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:44,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616323098] [2022-03-18 04:05:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:44,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:44,609 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:44,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569467114] [2022-03-18 04:05:44,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:05:44,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:44,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:44,610 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 04:05:44,611 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 04:05:44,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-18 04:05:44,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:44,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 04:05:44,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 48 proven. 2532 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:45,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 48 proven. 1428 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2022-03-18 04:05:46,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:46,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616323098] [2022-03-18 04:05:46,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:46,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569467114] [2022-03-18 04:05:46,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569467114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:46,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:46,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-03-18 04:05:46,216 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:46,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [914048881] [2022-03-18 04:05:46,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [914048881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:46,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:46,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-18 04:05:46,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733446204] [2022-03-18 04:05:46,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:46,217 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 04:05:46,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:46,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 04:05:46,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-18 04:05:46,218 INFO L87 Difference]: Start difference. First operand 236 states and 261 transitions. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-18 04:05:46,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:46,592 INFO L93 Difference]: Finished difference Result 250 states and 276 transitions. [2022-03-18 04:05:46,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-18 04:05:46,592 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) Word has length 239 [2022-03-18 04:05:46,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:46,594 INFO L225 Difference]: With dead ends: 250 [2022-03-18 04:05:46,594 INFO L226 Difference]: Without dead ends: 245 [2022-03-18 04:05:46,595 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2603, Invalid=3403, Unknown=0, NotChecked=0, Total=6006 [2022-03-18 04:05:46,595 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 68 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:46,595 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 280 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:46,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-18 04:05:46,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-03-18 04:05:46,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 187 states have (on average 1.13903743315508) internal successors, (213), 187 states have internal predecessors, (213), 30 states have call successors, (30), 29 states have call predecessors, (30), 27 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-18 04:05:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 271 transitions. [2022-03-18 04:05:46,614 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 271 transitions. Word has length 239 [2022-03-18 04:05:46,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:46,615 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 271 transitions. [2022-03-18 04:05:46,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-18 04:05:46,615 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 271 transitions. [2022-03-18 04:05:46,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-03-18 04:05:46,616 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:46,616 INFO L500 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:46,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-18 04:05:46,839 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 04:05:46,839 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:46,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:46,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1530108956, now seen corresponding path program 49 times [2022-03-18 04:05:46,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:46,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1350856574] [2022-03-18 04:05:46,840 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:46,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1530108956, now seen corresponding path program 50 times [2022-03-18 04:05:46,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:46,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925364873] [2022-03-18 04:05:46,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:46,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:46,847 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:46,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32530636] [2022-03-18 04:05:46,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:05:46,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:46,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:46,848 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 04:05:46,850 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 04:05:46,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:05:46,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:46,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 04:05:46,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 50 proven. 2750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:47,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 50 proven. 1550 refuted. 0 times theorem prover too weak. 1204 trivial. 0 not checked. [2022-03-18 04:05:48,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:48,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925364873] [2022-03-18 04:05:48,451 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:48,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32530636] [2022-03-18 04:05:48,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32530636] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:48,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:48,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2022-03-18 04:05:48,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:48,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1350856574] [2022-03-18 04:05:48,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1350856574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:48,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:48,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-18 04:05:48,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527181886] [2022-03-18 04:05:48,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:48,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 04:05:48,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:48,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 04:05:48,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2022-03-18 04:05:48,454 INFO L87 Difference]: Start difference. First operand 245 states and 271 transitions. Second operand has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-18 04:05:48,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:48,840 INFO L93 Difference]: Finished difference Result 259 states and 286 transitions. [2022-03-18 04:05:48,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-18 04:05:48,840 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) Word has length 248 [2022-03-18 04:05:48,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:48,843 INFO L225 Difference]: With dead ends: 259 [2022-03-18 04:05:48,843 INFO L226 Difference]: Without dead ends: 254 [2022-03-18 04:05:48,845 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2811, Invalid=3669, Unknown=0, NotChecked=0, Total=6480 [2022-03-18 04:05:48,850 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 109 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:48,850 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 288 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:48,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-18 04:05:48,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-03-18 04:05:48,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.1391752577319587) internal successors, (221), 194 states have internal predecessors, (221), 31 states have call successors, (31), 30 states have call predecessors, (31), 28 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-18 04:05:48,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 281 transitions. [2022-03-18 04:05:48,871 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 281 transitions. Word has length 248 [2022-03-18 04:05:48,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:48,871 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 281 transitions. [2022-03-18 04:05:48,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-18 04:05:48,871 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 281 transitions. [2022-03-18 04:05:48,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-03-18 04:05:48,873 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:48,873 INFO L500 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:48,892 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 04:05:49,083 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 04:05:49,083 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:49,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:49,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1713487146, now seen corresponding path program 51 times [2022-03-18 04:05:49,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:49,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1987212994] [2022-03-18 04:05:49,084 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:49,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1713487146, now seen corresponding path program 52 times [2022-03-18 04:05:49,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:49,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301741569] [2022-03-18 04:05:49,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:49,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:49,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:49,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840925675] [2022-03-18 04:05:49,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:05:49,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:49,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:49,099 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 04:05:49,100 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 04:05:49,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:05:49,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:49,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-18 04:05:49,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3033 backedges. 52 proven. 2977 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:49,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3033 backedges. 52 proven. 1677 refuted. 0 times theorem prover too weak. 1304 trivial. 0 not checked. [2022-03-18 04:05:50,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:50,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301741569] [2022-03-18 04:05:50,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:50,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840925675] [2022-03-18 04:05:50,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840925675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:50,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:50,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2022-03-18 04:05:50,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:50,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1987212994] [2022-03-18 04:05:50,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1987212994] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:50,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:50,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-18 04:05:50,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101295032] [2022-03-18 04:05:50,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:50,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 04:05:50,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:50,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 04:05:50,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1545, Invalid=1761, Unknown=0, NotChecked=0, Total=3306 [2022-03-18 04:05:50,792 INFO L87 Difference]: Start difference. First operand 254 states and 281 transitions. Second operand has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-18 04:05:51,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:51,221 INFO L93 Difference]: Finished difference Result 268 states and 296 transitions. [2022-03-18 04:05:51,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-18 04:05:51,221 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) Word has length 257 [2022-03-18 04:05:51,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:51,223 INFO L225 Difference]: With dead ends: 268 [2022-03-18 04:05:51,223 INFO L226 Difference]: Without dead ends: 263 [2022-03-18 04:05:51,224 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3027, Invalid=3945, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 04:05:51,225 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 85 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:51,225 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 296 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:51,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-18 04:05:51,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-03-18 04:05:51,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 201 states have (on average 1.1393034825870647) internal successors, (229), 201 states have internal predecessors, (229), 32 states have call successors, (32), 31 states have call predecessors, (32), 29 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-18 04:05:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 291 transitions. [2022-03-18 04:05:51,244 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 291 transitions. Word has length 257 [2022-03-18 04:05:51,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:51,244 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 291 transitions. [2022-03-18 04:05:51,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-18 04:05:51,244 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 291 transitions. [2022-03-18 04:05:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-03-18 04:05:51,246 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:51,246 INFO L500 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:51,273 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 04:05:51,459 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 04:05:51,459 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:51,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:51,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1462406492, now seen corresponding path program 53 times [2022-03-18 04:05:51,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:51,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [746970600] [2022-03-18 04:05:51,460 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:51,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1462406492, now seen corresponding path program 54 times [2022-03-18 04:05:51,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:51,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529863491] [2022-03-18 04:05:51,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:51,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:51,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:51,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808107801] [2022-03-18 04:05:51,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:05:51,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:51,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:51,469 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 04:05:51,469 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 04:05:51,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-18 04:05:51,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:51,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-18 04:05:51,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3271 backedges. 54 proven. 3213 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:52,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3271 backedges. 54 proven. 1809 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2022-03-18 04:05:53,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:53,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529863491] [2022-03-18 04:05:53,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:53,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808107801] [2022-03-18 04:05:53,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808107801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:53,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:53,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2022-03-18 04:05:53,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:53,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [746970600] [2022-03-18 04:05:53,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [746970600] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:53,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:53,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-18 04:05:53,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022932082] [2022-03-18 04:05:53,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:53,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 04:05:53,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:53,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 04:05:53,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=1882, Unknown=0, NotChecked=0, Total=3540 [2022-03-18 04:05:53,297 INFO L87 Difference]: Start difference. First operand 263 states and 291 transitions. Second operand has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-18 04:05:53,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:53,719 INFO L93 Difference]: Finished difference Result 277 states and 306 transitions. [2022-03-18 04:05:53,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-18 04:05:53,719 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) Word has length 266 [2022-03-18 04:05:53,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:53,724 INFO L225 Difference]: With dead ends: 277 [2022-03-18 04:05:53,724 INFO L226 Difference]: Without dead ends: 272 [2022-03-18 04:05:53,726 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3251, Invalid=4231, Unknown=0, NotChecked=0, Total=7482 [2022-03-18 04:05:53,727 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 96 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:53,727 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 292 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:05:53,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-18 04:05:53,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-03-18 04:05:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 208 states have (on average 1.1394230769230769) internal successors, (237), 208 states have internal predecessors, (237), 33 states have call successors, (33), 32 states have call predecessors, (33), 30 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-18 04:05:53,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 301 transitions. [2022-03-18 04:05:53,756 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 301 transitions. Word has length 266 [2022-03-18 04:05:53,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:53,757 INFO L478 AbstractCegarLoop]: Abstraction has 272 states and 301 transitions. [2022-03-18 04:05:53,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-18 04:05:53,757 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 301 transitions. [2022-03-18 04:05:53,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-03-18 04:05:53,758 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:53,758 INFO L500 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:53,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-18 04:05:53,973 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 04:05:53,973 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:53,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:53,973 INFO L85 PathProgramCache]: Analyzing trace with hash -394085994, now seen corresponding path program 55 times [2022-03-18 04:05:53,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:53,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1968848735] [2022-03-18 04:05:53,974 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:53,974 INFO L85 PathProgramCache]: Analyzing trace with hash -394085994, now seen corresponding path program 56 times [2022-03-18 04:05:53,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:53,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557567474] [2022-03-18 04:05:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:53,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:53,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:53,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276152561] [2022-03-18 04:05:53,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:05:53,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:53,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:53,984 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 04:05:53,985 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 04:05:54,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:05:54,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:54,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-18 04:05:54,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3518 backedges. 56 proven. 3458 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:54,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3518 backedges. 56 proven. 1946 refuted. 0 times theorem prover too weak. 1516 trivial. 0 not checked. [2022-03-18 04:05:56,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:56,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557567474] [2022-03-18 04:05:56,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:56,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276152561] [2022-03-18 04:05:56,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276152561] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:56,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:56,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2022-03-18 04:05:56,042 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:56,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1968848735] [2022-03-18 04:05:56,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1968848735] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:56,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:56,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-18 04:05:56,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275606570] [2022-03-18 04:05:56,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:56,043 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 04:05:56,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:56,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 04:05:56,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1775, Invalid=2007, Unknown=0, NotChecked=0, Total=3782 [2022-03-18 04:05:56,044 INFO L87 Difference]: Start difference. First operand 272 states and 301 transitions. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-18 04:05:56,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:56,545 INFO L93 Difference]: Finished difference Result 286 states and 316 transitions. [2022-03-18 04:05:56,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-18 04:05:56,545 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) Word has length 275 [2022-03-18 04:05:56,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:56,547 INFO L225 Difference]: With dead ends: 286 [2022-03-18 04:05:56,547 INFO L226 Difference]: Without dead ends: 281 [2022-03-18 04:05:56,548 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3483, Invalid=4527, Unknown=0, NotChecked=0, Total=8010 [2022-03-18 04:05:56,548 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 100 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:56,549 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 330 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:05:56,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-18 04:05:56,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-03-18 04:05:56,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 215 states have (on average 1.1395348837209303) internal successors, (245), 215 states have internal predecessors, (245), 34 states have call successors, (34), 33 states have call predecessors, (34), 31 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-18 04:05:56,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 311 transitions. [2022-03-18 04:05:56,568 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 311 transitions. Word has length 275 [2022-03-18 04:05:56,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:56,568 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 311 transitions. [2022-03-18 04:05:56,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-18 04:05:56,568 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 311 transitions. [2022-03-18 04:05:56,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-03-18 04:05:56,570 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:56,570 INFO L500 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:56,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-18 04:05:56,789 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 04:05:56,789 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:56,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:56,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1379905180, now seen corresponding path program 57 times [2022-03-18 04:05:56,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:56,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [365969873] [2022-03-18 04:05:56,791 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:56,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1379905180, now seen corresponding path program 58 times [2022-03-18 04:05:56,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:56,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715825630] [2022-03-18 04:05:56,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:56,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:56,803 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:56,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943347253] [2022-03-18 04:05:56,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:05:56,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:56,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:56,816 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 04:05:56,827 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 04:05:56,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:05:56,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:56,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-18 04:05:56,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:05:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 58 proven. 3712 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:05:57,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:05:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 58 proven. 2088 refuted. 0 times theorem prover too weak. 1628 trivial. 0 not checked. [2022-03-18 04:05:58,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:05:58,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715825630] [2022-03-18 04:05:58,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:05:58,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943347253] [2022-03-18 04:05:58,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943347253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:05:58,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:05:58,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2022-03-18 04:05:58,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:05:58,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [365969873] [2022-03-18 04:05:58,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [365969873] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:05:58,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:05:58,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-18 04:05:58,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095781672] [2022-03-18 04:05:58,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:05:58,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 04:05:58,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:58,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 04:05:58,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1896, Invalid=2136, Unknown=0, NotChecked=0, Total=4032 [2022-03-18 04:05:58,784 INFO L87 Difference]: Start difference. First operand 281 states and 311 transitions. Second operand has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-18 04:05:59,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:05:59,374 INFO L93 Difference]: Finished difference Result 295 states and 326 transitions. [2022-03-18 04:05:59,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-18 04:05:59,375 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) Word has length 284 [2022-03-18 04:05:59,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:05:59,376 INFO L225 Difference]: With dead ends: 295 [2022-03-18 04:05:59,376 INFO L226 Difference]: Without dead ends: 290 [2022-03-18 04:05:59,376 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3723, Invalid=4833, Unknown=0, NotChecked=0, Total=8556 [2022-03-18 04:05:59,379 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 111 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:05:59,379 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 332 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:05:59,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-18 04:05:59,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-03-18 04:05:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 222 states have (on average 1.1396396396396395) internal successors, (253), 222 states have internal predecessors, (253), 35 states have call successors, (35), 34 states have call predecessors, (35), 32 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-18 04:05:59,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 321 transitions. [2022-03-18 04:05:59,399 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 321 transitions. Word has length 284 [2022-03-18 04:05:59,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:05:59,400 INFO L478 AbstractCegarLoop]: Abstraction has 290 states and 321 transitions. [2022-03-18 04:05:59,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-18 04:05:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 321 transitions. [2022-03-18 04:05:59,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-03-18 04:05:59,402 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:05:59,402 INFO L500 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:05:59,422 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 04:05:59,615 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 04:05:59,615 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:05:59,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:05:59,616 INFO L85 PathProgramCache]: Analyzing trace with hash 520028246, now seen corresponding path program 59 times [2022-03-18 04:05:59,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:05:59,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1892426403] [2022-03-18 04:05:59,616 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:05:59,616 INFO L85 PathProgramCache]: Analyzing trace with hash 520028246, now seen corresponding path program 60 times [2022-03-18 04:05:59,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:05:59,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580215382] [2022-03-18 04:05:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:05:59,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:05:59,623 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:05:59,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1443062141] [2022-03-18 04:05:59,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:05:59,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:05:59,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:05:59,625 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 04:05:59,628 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 04:05:59,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-18 04:05:59,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:05:59,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-18 04:05:59,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:06:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4039 backedges. 60 proven. 3975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:06:00,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:06:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4039 backedges. 60 proven. 2235 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2022-03-18 04:06:01,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:06:01,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580215382] [2022-03-18 04:06:01,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:06:01,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443062141] [2022-03-18 04:06:01,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443062141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:06:01,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:06:01,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2022-03-18 04:06:01,804 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:06:01,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1892426403] [2022-03-18 04:06:01,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1892426403] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:06:01,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:06:01,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-18 04:06:01,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279665570] [2022-03-18 04:06:01,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:06:01,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 04:06:01,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:01,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 04:06:01,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2022-03-18 04:06:01,806 INFO L87 Difference]: Start difference. First operand 290 states and 321 transitions. Second operand has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-18 04:06:02,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:06:02,364 INFO L93 Difference]: Finished difference Result 304 states and 336 transitions. [2022-03-18 04:06:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-18 04:06:02,364 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) Word has length 293 [2022-03-18 04:06:02,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:06:02,365 INFO L225 Difference]: With dead ends: 304 [2022-03-18 04:06:02,365 INFO L226 Difference]: Without dead ends: 299 [2022-03-18 04:06:02,366 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3971, Invalid=5149, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 04:06:02,367 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 160 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:06:02,367 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 304 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:06:02,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-18 04:06:02,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-03-18 04:06:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 229 states have internal predecessors, (261), 36 states have call successors, (36), 35 states have call predecessors, (36), 33 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-18 04:06:02,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 331 transitions. [2022-03-18 04:06:02,388 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 331 transitions. Word has length 293 [2022-03-18 04:06:02,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:06:02,388 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 331 transitions. [2022-03-18 04:06:02,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-18 04:06:02,388 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 331 transitions. [2022-03-18 04:06:02,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-03-18 04:06:02,390 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:06:02,390 INFO L500 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:06:02,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-18 04:06:02,603 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 04:06:02,603 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:06:02,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:06:02,604 INFO L85 PathProgramCache]: Analyzing trace with hash -213450788, now seen corresponding path program 61 times [2022-03-18 04:06:02,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:02,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1482191271] [2022-03-18 04:06:02,604 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:06:02,604 INFO L85 PathProgramCache]: Analyzing trace with hash -213450788, now seen corresponding path program 62 times [2022-03-18 04:06:02,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:06:02,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682099725] [2022-03-18 04:06:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:06:02,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:06:02,612 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:06:02,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [956170829] [2022-03-18 04:06:02,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:06:02,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:06:02,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:06:02,614 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 04:06:02,615 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 04:06:02,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:06:02,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:06:02,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-18 04:06:02,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:06:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 62 proven. 4247 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:06:03,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:06:05,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 62 proven. 2387 refuted. 0 times theorem prover too weak. 1864 trivial. 0 not checked. [2022-03-18 04:06:05,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:06:05,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682099725] [2022-03-18 04:06:05,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:06:05,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956170829] [2022-03-18 04:06:05,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956170829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:06:05,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:06:05,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2022-03-18 04:06:05,006 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:06:05,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1482191271] [2022-03-18 04:06:05,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1482191271] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:06:05,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:06:05,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-18 04:06:05,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903878763] [2022-03-18 04:06:05,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:06:05,007 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 04:06:05,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:05,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 04:06:05,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=2406, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 04:06:05,008 INFO L87 Difference]: Start difference. First operand 299 states and 331 transitions. Second operand has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-18 04:06:05,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:06:05,583 INFO L93 Difference]: Finished difference Result 313 states and 346 transitions. [2022-03-18 04:06:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-18 04:06:05,583 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) Word has length 302 [2022-03-18 04:06:05,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:06:05,585 INFO L225 Difference]: With dead ends: 313 [2022-03-18 04:06:05,585 INFO L226 Difference]: Without dead ends: 308 [2022-03-18 04:06:05,586 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4227, Invalid=5475, Unknown=0, NotChecked=0, Total=9702 [2022-03-18 04:06:05,586 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 118 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:06:05,586 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 324 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:06:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-18 04:06:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-03-18 04:06:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 236 states have (on average 1.1398305084745763) internal successors, (269), 236 states have internal predecessors, (269), 37 states have call successors, (37), 36 states have call predecessors, (37), 34 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-18 04:06:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 341 transitions. [2022-03-18 04:06:05,615 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 341 transitions. Word has length 302 [2022-03-18 04:06:05,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:06:05,615 INFO L478 AbstractCegarLoop]: Abstraction has 308 states and 341 transitions. [2022-03-18 04:06:05,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-18 04:06:05,616 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 341 transitions. [2022-03-18 04:06:05,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-03-18 04:06:05,617 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:06:05,617 INFO L500 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:06:05,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-18 04:06:05,841 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 04:06:05,841 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:06:05,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:06:05,842 INFO L85 PathProgramCache]: Analyzing trace with hash 83826454, now seen corresponding path program 63 times [2022-03-18 04:06:05,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:05,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [711832544] [2022-03-18 04:06:05,842 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:06:05,842 INFO L85 PathProgramCache]: Analyzing trace with hash 83826454, now seen corresponding path program 64 times [2022-03-18 04:06:05,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:06:05,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669832477] [2022-03-18 04:06:05,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:06:05,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:06:05,853 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:06:05,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862941080] [2022-03-18 04:06:05,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:06:05,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:06:05,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:06:05,855 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 04:06:05,857 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 04:06:05,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:06:05,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:06:05,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 04:06:05,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:06:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 64 proven. 4528 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:06:06,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:06:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 64 proven. 2544 refuted. 0 times theorem prover too weak. 1988 trivial. 0 not checked. [2022-03-18 04:06:08,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:06:08,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669832477] [2022-03-18 04:06:08,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:06:08,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862941080] [2022-03-18 04:06:08,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862941080] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:06:08,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:06:08,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2022-03-18 04:06:08,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:06:08,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [711832544] [2022-03-18 04:06:08,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [711832544] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:06:08,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:06:08,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-18 04:06:08,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564600948] [2022-03-18 04:06:08,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:06:08,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 04:06:08,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:08,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 04:06:08,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2283, Invalid=2547, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 04:06:08,235 INFO L87 Difference]: Start difference. First operand 308 states and 341 transitions. Second operand has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-18 04:06:08,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:06:08,886 INFO L93 Difference]: Finished difference Result 322 states and 356 transitions. [2022-03-18 04:06:08,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-18 04:06:08,887 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) Word has length 311 [2022-03-18 04:06:08,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:06:08,889 INFO L225 Difference]: With dead ends: 322 [2022-03-18 04:06:08,889 INFO L226 Difference]: Without dead ends: 317 [2022-03-18 04:06:08,890 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4491, Invalid=5811, Unknown=0, NotChecked=0, Total=10302 [2022-03-18 04:06:08,891 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 151 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:06:08,891 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 332 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:06:08,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-03-18 04:06:08,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2022-03-18 04:06:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 243 states have (on average 1.139917695473251) internal successors, (277), 243 states have internal predecessors, (277), 38 states have call successors, (38), 37 states have call predecessors, (38), 35 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-18 04:06:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 351 transitions. [2022-03-18 04:06:08,921 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 351 transitions. Word has length 311 [2022-03-18 04:06:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:06:08,922 INFO L478 AbstractCegarLoop]: Abstraction has 317 states and 351 transitions. [2022-03-18 04:06:08,922 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-18 04:06:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 351 transitions. [2022-03-18 04:06:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-03-18 04:06:08,924 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:06:08,924 INFO L500 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:06:08,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-18 04:06:09,139 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 04:06:09,139 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:06:09,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:06:09,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1410629916, now seen corresponding path program 65 times [2022-03-18 04:06:09,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:09,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [931791846] [2022-03-18 04:06:09,140 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:06:09,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1410629916, now seen corresponding path program 66 times [2022-03-18 04:06:09,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:06:09,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738207927] [2022-03-18 04:06:09,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:06:09,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:06:09,147 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:06:09,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702390294] [2022-03-18 04:06:09,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:06:09,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:06:09,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:06:09,148 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 04:06:09,149 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 04:06:09,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-03-18 04:06:09,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:06:09,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 04:06:09,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:06:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4888 backedges. 66 proven. 4818 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:06:10,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:06:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4888 backedges. 66 proven. 2706 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-03-18 04:06:11,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:06:11,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738207927] [2022-03-18 04:06:11,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:06:11,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702390294] [2022-03-18 04:06:11,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702390294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:06:11,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:06:11,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2022-03-18 04:06:11,585 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:06:11,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [931791846] [2022-03-18 04:06:11,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [931791846] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:06:11,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:06:11,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-18 04:06:11,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278852860] [2022-03-18 04:06:11,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:06:11,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 04:06:11,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:11,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 04:06:11,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2420, Invalid=2692, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 04:06:11,588 INFO L87 Difference]: Start difference. First operand 317 states and 351 transitions. Second operand has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-18 04:06:12,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:06:12,237 INFO L93 Difference]: Finished difference Result 331 states and 366 transitions. [2022-03-18 04:06:12,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-18 04:06:12,237 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) Word has length 320 [2022-03-18 04:06:12,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:06:12,238 INFO L225 Difference]: With dead ends: 331 [2022-03-18 04:06:12,239 INFO L226 Difference]: Without dead ends: 326 [2022-03-18 04:06:12,240 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4763, Invalid=6157, Unknown=0, NotChecked=0, Total=10920 [2022-03-18 04:06:12,240 INFO L912 BasicCegarLoop]: 59 mSDtfsCounter, 128 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:06:12,240 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 358 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:06:12,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-18 04:06:12,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2022-03-18 04:06:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 250 states have (on average 1.14) internal successors, (285), 250 states have internal predecessors, (285), 39 states have call successors, (39), 38 states have call predecessors, (39), 36 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-18 04:06:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 361 transitions. [2022-03-18 04:06:12,268 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 361 transitions. Word has length 320 [2022-03-18 04:06:12,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:06:12,268 INFO L478 AbstractCegarLoop]: Abstraction has 326 states and 361 transitions. [2022-03-18 04:06:12,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-18 04:06:12,268 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 361 transitions. [2022-03-18 04:06:12,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-03-18 04:06:12,270 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:06:12,270 INFO L500 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:06:12,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-18 04:06:12,470 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 04:06:12,470 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:06:12,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:06:12,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1328479702, now seen corresponding path program 67 times [2022-03-18 04:06:12,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:12,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [373085209] [2022-03-18 04:06:12,471 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:06:12,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1328479702, now seen corresponding path program 68 times [2022-03-18 04:06:12,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:06:12,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333499078] [2022-03-18 04:06:12,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:06:12,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:06:12,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:06:12,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939077718] [2022-03-18 04:06:12,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:06:12,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:06:12,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:06:12,480 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 04:06:12,482 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 04:06:12,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:06:12,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:06:12,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-18 04:06:12,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:06:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5189 backedges. 68 proven. 5117 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:06:13,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:06:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5189 backedges. 68 proven. 2873 refuted. 0 times theorem prover too weak. 2248 trivial. 0 not checked. [2022-03-18 04:06:14,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:06:14,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333499078] [2022-03-18 04:06:14,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:06:14,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939077718] [2022-03-18 04:06:14,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939077718] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:06:14,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:06:14,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 74 [2022-03-18 04:06:14,965 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:06:14,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [373085209] [2022-03-18 04:06:14,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [373085209] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:06:14,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:06:14,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-18 04:06:14,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410170961] [2022-03-18 04:06:14,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:06:14,966 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 04:06:14,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:14,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 04:06:14,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2561, Invalid=2841, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 04:06:14,967 INFO L87 Difference]: Start difference. First operand 326 states and 361 transitions. Second operand has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-18 04:06:15,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:06:15,584 INFO L93 Difference]: Finished difference Result 340 states and 376 transitions. [2022-03-18 04:06:15,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-18 04:06:15,585 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) Word has length 329 [2022-03-18 04:06:15,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:06:15,586 INFO L225 Difference]: With dead ends: 340 [2022-03-18 04:06:15,586 INFO L226 Difference]: Without dead ends: 335 [2022-03-18 04:06:15,587 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5043, Invalid=6513, Unknown=0, NotChecked=0, Total=11556 [2022-03-18 04:06:15,587 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 157 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:06:15,587 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 348 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:06:15,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-03-18 04:06:15,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2022-03-18 04:06:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 257 states have (on average 1.140077821011673) internal successors, (293), 257 states have internal predecessors, (293), 40 states have call successors, (40), 39 states have call predecessors, (40), 37 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-18 04:06:15,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 371 transitions. [2022-03-18 04:06:15,607 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 371 transitions. Word has length 329 [2022-03-18 04:06:15,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:06:15,608 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 371 transitions. [2022-03-18 04:06:15,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-18 04:06:15,608 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 371 transitions. [2022-03-18 04:06:15,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-03-18 04:06:15,610 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:06:15,610 INFO L500 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:06:15,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-18 04:06:15,823 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 04:06:15,823 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:06:15,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:06:15,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1098658396, now seen corresponding path program 69 times [2022-03-18 04:06:15,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:15,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [139872128] [2022-03-18 04:06:15,824 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:06:15,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1098658396, now seen corresponding path program 70 times [2022-03-18 04:06:15,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:06:15,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180530347] [2022-03-18 04:06:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:06:15,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:06:15,832 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:06:15,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140803325] [2022-03-18 04:06:15,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:06:15,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:06:15,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:06:15,834 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 04:06:15,835 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 04:06:15,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:06:15,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:06:15,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-18 04:06:15,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:06:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 70 proven. 5425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:06:16,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:06:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 70 proven. 3045 refuted. 0 times theorem prover too weak. 2384 trivial. 0 not checked. [2022-03-18 04:06:18,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:06:18,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180530347] [2022-03-18 04:06:18,428 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:06:18,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140803325] [2022-03-18 04:06:18,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140803325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:06:18,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:06:18,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 76 [2022-03-18 04:06:18,428 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:06:18,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [139872128] [2022-03-18 04:06:18,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [139872128] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:06:18,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:06:18,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-18 04:06:18,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575878200] [2022-03-18 04:06:18,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:06:18,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 04:06:18,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:18,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 04:06:18,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2706, Invalid=2994, Unknown=0, NotChecked=0, Total=5700 [2022-03-18 04:06:18,431 INFO L87 Difference]: Start difference. First operand 335 states and 371 transitions. Second operand has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-18 04:06:19,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:06:19,077 INFO L93 Difference]: Finished difference Result 349 states and 386 transitions. [2022-03-18 04:06:19,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-18 04:06:19,077 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) Word has length 338 [2022-03-18 04:06:19,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:06:19,079 INFO L225 Difference]: With dead ends: 349 [2022-03-18 04:06:19,079 INFO L226 Difference]: Without dead ends: 344 [2022-03-18 04:06:19,080 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5331, Invalid=6879, Unknown=0, NotChecked=0, Total=12210 [2022-03-18 04:06:19,080 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 121 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:06:19,080 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 368 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:06:19,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-03-18 04:06:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-03-18 04:06:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 264 states have (on average 1.1401515151515151) internal successors, (301), 264 states have internal predecessors, (301), 41 states have call successors, (41), 40 states have call predecessors, (41), 38 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-18 04:06:19,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 381 transitions. [2022-03-18 04:06:19,104 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 381 transitions. Word has length 338 [2022-03-18 04:06:19,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:06:19,105 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 381 transitions. [2022-03-18 04:06:19,105 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-18 04:06:19,105 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 381 transitions. [2022-03-18 04:06:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-03-18 04:06:19,107 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:06:19,107 INFO L500 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:06:19,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-18 04:06:19,311 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 04:06:19,311 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:06:19,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:06:19,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1597682838, now seen corresponding path program 71 times [2022-03-18 04:06:19,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:19,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1440135738] [2022-03-18 04:06:19,312 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:06:19,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1597682838, now seen corresponding path program 72 times [2022-03-18 04:06:19,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:06:19,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268387584] [2022-03-18 04:06:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:06:19,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:06:19,321 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:06:19,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570366058] [2022-03-18 04:06:19,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:06:19,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:06:19,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:06:19,323 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 04:06:19,353 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 04:06:19,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-18 04:06:19,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:06:19,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-18 04:06:19,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:06:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5818 backedges. 72 proven. 5742 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:06:20,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:06:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5818 backedges. 72 proven. 3222 refuted. 0 times theorem prover too weak. 2524 trivial. 0 not checked. [2022-03-18 04:06:22,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:06:22,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268387584] [2022-03-18 04:06:22,116 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:06:22,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570366058] [2022-03-18 04:06:22,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570366058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:06:22,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:06:22,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2022-03-18 04:06:22,116 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:06:22,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1440135738] [2022-03-18 04:06:22,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1440135738] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:06:22,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:06:22,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-18 04:06:22,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932031764] [2022-03-18 04:06:22,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:06:22,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-18 04:06:22,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:22,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-18 04:06:22,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2855, Invalid=3151, Unknown=0, NotChecked=0, Total=6006 [2022-03-18 04:06:22,118 INFO L87 Difference]: Start difference. First operand 344 states and 381 transitions. Second operand has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-18 04:06:22,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:06:22,790 INFO L93 Difference]: Finished difference Result 358 states and 396 transitions. [2022-03-18 04:06:22,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-18 04:06:22,790 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) Word has length 347 [2022-03-18 04:06:22,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:06:22,791 INFO L225 Difference]: With dead ends: 358 [2022-03-18 04:06:22,792 INFO L226 Difference]: Without dead ends: 353 [2022-03-18 04:06:22,793 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 617 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5627, Invalid=7255, Unknown=0, NotChecked=0, Total=12882 [2022-03-18 04:06:22,793 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 135 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:06:22,793 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 370 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:06:22,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-03-18 04:06:22,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-03-18 04:06:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 271 states have (on average 1.1402214022140222) internal successors, (309), 271 states have internal predecessors, (309), 42 states have call successors, (42), 41 states have call predecessors, (42), 39 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-18 04:06:22,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 391 transitions. [2022-03-18 04:06:22,818 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 391 transitions. Word has length 347 [2022-03-18 04:06:22,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:06:22,818 INFO L478 AbstractCegarLoop]: Abstraction has 353 states and 391 transitions. [2022-03-18 04:06:22,818 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-18 04:06:22,818 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 391 transitions. [2022-03-18 04:06:22,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-03-18 04:06:22,820 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:06:22,820 INFO L500 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 37, 37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:06:22,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-18 04:06:23,035 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 04:06:23,035 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:06:23,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:06:23,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2068976540, now seen corresponding path program 73 times [2022-03-18 04:06:23,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:23,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [424856350] [2022-03-18 04:06:23,036 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:06:23,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2068976540, now seen corresponding path program 74 times [2022-03-18 04:06:23,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:06:23,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594490897] [2022-03-18 04:06:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:06:23,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:06:23,045 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:06:23,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118453442] [2022-03-18 04:06:23,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:06:23,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:06:23,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:06:23,047 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 04:06:23,047 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 04:06:23,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:06:23,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:06:23,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 04:06:23,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:06:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6146 backedges. 74 proven. 6068 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:06:24,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:06:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6146 backedges. 74 proven. 3404 refuted. 0 times theorem prover too weak. 2668 trivial. 0 not checked. [2022-03-18 04:06:25,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:06:25,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594490897] [2022-03-18 04:06:25,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:06:25,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118453442] [2022-03-18 04:06:25,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118453442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:06:25,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:06:25,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2022-03-18 04:06:25,887 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:06:25,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [424856350] [2022-03-18 04:06:25,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [424856350] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:06:25,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:06:25,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-18 04:06:25,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857607480] [2022-03-18 04:06:25,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:06:25,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 04:06:25,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:25,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 04:06:25,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3008, Invalid=3312, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 04:06:25,889 INFO L87 Difference]: Start difference. First operand 353 states and 391 transitions. Second operand has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-18 04:06:26,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:06:26,591 INFO L93 Difference]: Finished difference Result 367 states and 406 transitions. [2022-03-18 04:06:26,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-18 04:06:26,591 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) Word has length 356 [2022-03-18 04:06:26,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:06:26,592 INFO L225 Difference]: With dead ends: 367 [2022-03-18 04:06:26,592 INFO L226 Difference]: Without dead ends: 362 [2022-03-18 04:06:26,593 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 633 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5931, Invalid=7641, Unknown=0, NotChecked=0, Total=13572 [2022-03-18 04:06:26,593 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 142 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 04:06:26,594 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 372 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 04:06:26,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-18 04:06:26,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2022-03-18 04:06:26,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 278 states have (on average 1.1402877697841727) internal successors, (317), 278 states have internal predecessors, (317), 43 states have call successors, (43), 42 states have call predecessors, (43), 40 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-18 04:06:26,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 401 transitions. [2022-03-18 04:06:26,619 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 401 transitions. Word has length 356 [2022-03-18 04:06:26,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:06:26,619 INFO L478 AbstractCegarLoop]: Abstraction has 362 states and 401 transitions. [2022-03-18 04:06:26,619 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-18 04:06:26,620 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 401 transitions. [2022-03-18 04:06:26,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-03-18 04:06:26,621 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:06:26,622 INFO L500 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 38, 38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:06:26,640 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 04:06:26,827 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 04:06:26,827 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:06:26,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:06:26,828 INFO L85 PathProgramCache]: Analyzing trace with hash 63847254, now seen corresponding path program 75 times [2022-03-18 04:06:26,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:26,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [148754846] [2022-03-18 04:06:26,828 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:06:26,828 INFO L85 PathProgramCache]: Analyzing trace with hash 63847254, now seen corresponding path program 76 times [2022-03-18 04:06:26,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:06:26,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742557511] [2022-03-18 04:06:26,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:06:26,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:06:26,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:06:26,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615497353] [2022-03-18 04:06:26,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:06:26,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:06:26,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:06:26,838 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 04:06:26,839 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 04:06:26,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:06:26,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:06:26,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-18 04:06:26,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:06:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6483 backedges. 76 proven. 6403 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:06:27,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:06:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6483 backedges. 76 proven. 3591 refuted. 0 times theorem prover too weak. 2816 trivial. 0 not checked. [2022-03-18 04:06:29,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:06:29,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742557511] [2022-03-18 04:06:29,747 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:06:29,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615497353] [2022-03-18 04:06:29,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615497353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:06:29,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:06:29,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2022-03-18 04:06:29,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:06:29,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [148754846] [2022-03-18 04:06:29,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [148754846] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:06:29,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:06:29,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-18 04:06:29,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633106946] [2022-03-18 04:06:29,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:06:29,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 04:06:29,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:29,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 04:06:29,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3165, Invalid=3477, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 04:06:29,750 INFO L87 Difference]: Start difference. First operand 362 states and 401 transitions. Second operand has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-18 04:06:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:06:30,505 INFO L93 Difference]: Finished difference Result 376 states and 416 transitions. [2022-03-18 04:06:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-18 04:06:30,505 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) Word has length 365 [2022-03-18 04:06:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:06:30,507 INFO L225 Difference]: With dead ends: 376 [2022-03-18 04:06:30,507 INFO L226 Difference]: Without dead ends: 371 [2022-03-18 04:06:30,508 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 649 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6243, Invalid=8037, Unknown=0, NotChecked=0, Total=14280 [2022-03-18 04:06:30,508 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 159 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:06:30,509 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 386 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:06:30,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-03-18 04:06:30,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-03-18 04:06:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 285 states have (on average 1.1403508771929824) internal successors, (325), 285 states have internal predecessors, (325), 44 states have call successors, (44), 43 states have call predecessors, (44), 41 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-18 04:06:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 411 transitions. [2022-03-18 04:06:30,534 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 411 transitions. Word has length 365 [2022-03-18 04:06:30,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:06:30,535 INFO L478 AbstractCegarLoop]: Abstraction has 371 states and 411 transitions. [2022-03-18 04:06:30,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-18 04:06:30,535 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 411 transitions. [2022-03-18 04:06:30,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-03-18 04:06:30,537 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:06:30,537 INFO L500 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:06:30,563 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 04:06:30,753 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 04:06:30,753 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:06:30,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:06:30,753 INFO L85 PathProgramCache]: Analyzing trace with hash -194370340, now seen corresponding path program 77 times [2022-03-18 04:06:30,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:30,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1701424267] [2022-03-18 04:06:30,754 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:06:30,754 INFO L85 PathProgramCache]: Analyzing trace with hash -194370340, now seen corresponding path program 78 times [2022-03-18 04:06:30,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:06:30,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922642574] [2022-03-18 04:06:30,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:06:30,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:06:30,770 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:06:30,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187557342] [2022-03-18 04:06:30,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:06:30,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:06:30,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:06:30,772 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 04:06:30,774 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 04:06:31,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-03-18 04:06:31,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:06:31,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-18 04:06:31,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:06:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6829 backedges. 78 proven. 6747 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:06:32,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:06:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6829 backedges. 78 proven. 3783 refuted. 0 times theorem prover too weak. 2968 trivial. 0 not checked. [2022-03-18 04:06:33,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:06:33,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922642574] [2022-03-18 04:06:33,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:06:33,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187557342] [2022-03-18 04:06:33,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187557342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:06:33,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:06:33,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 84 [2022-03-18 04:06:33,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:06:33,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1701424267] [2022-03-18 04:06:33,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1701424267] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:06:33,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:06:33,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-18 04:06:33,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341051913] [2022-03-18 04:06:33,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:06:33,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 04:06:33,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:33,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 04:06:33,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3326, Invalid=3646, Unknown=0, NotChecked=0, Total=6972 [2022-03-18 04:06:33,975 INFO L87 Difference]: Start difference. First operand 371 states and 411 transitions. Second operand has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-18 04:06:34,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:06:34,741 INFO L93 Difference]: Finished difference Result 385 states and 426 transitions. [2022-03-18 04:06:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-18 04:06:34,742 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) Word has length 374 [2022-03-18 04:06:34,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:06:34,743 INFO L225 Difference]: With dead ends: 385 [2022-03-18 04:06:34,743 INFO L226 Difference]: Without dead ends: 380 [2022-03-18 04:06:34,745 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6563, Invalid=8443, Unknown=0, NotChecked=0, Total=15006 [2022-03-18 04:06:34,745 INFO L912 BasicCegarLoop]: 65 mSDtfsCounter, 116 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:06:34,745 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 400 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:06:34,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-03-18 04:06:34,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-03-18 04:06:34,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 292 states have (on average 1.1404109589041096) internal successors, (333), 292 states have internal predecessors, (333), 45 states have call successors, (45), 44 states have call predecessors, (45), 42 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-18 04:06:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 421 transitions. [2022-03-18 04:06:34,772 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 421 transitions. Word has length 374 [2022-03-18 04:06:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:06:34,772 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 421 transitions. [2022-03-18 04:06:34,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-18 04:06:34,773 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 421 transitions. [2022-03-18 04:06:34,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-03-18 04:06:34,775 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:06:34,775 INFO L500 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 40, 40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:06:34,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-18 04:06:34,981 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 04:06:34,982 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:06:34,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:06:34,982 INFO L85 PathProgramCache]: Analyzing trace with hash 949326358, now seen corresponding path program 79 times [2022-03-18 04:06:34,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:34,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [313218248] [2022-03-18 04:06:34,983 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:06:34,983 INFO L85 PathProgramCache]: Analyzing trace with hash 949326358, now seen corresponding path program 80 times [2022-03-18 04:06:34,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:06:34,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886668354] [2022-03-18 04:06:34,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:06:34,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:06:34,999 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:06:34,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769451066] [2022-03-18 04:06:34,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:06:35,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:06:35,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:06:35,001 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 04:06:35,002 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 04:06:35,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:06:35,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:06:35,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-18 04:06:35,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:06:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7184 backedges. 80 proven. 7100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:06:36,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:06:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7184 backedges. 80 proven. 3980 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2022-03-18 04:06:38,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:06:38,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886668354] [2022-03-18 04:06:38,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:06:38,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769451066] [2022-03-18 04:06:38,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769451066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:06:38,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:06:38,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 86 [2022-03-18 04:06:38,357 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:06:38,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [313218248] [2022-03-18 04:06:38,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [313218248] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:06:38,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:06:38,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-18 04:06:38,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633014342] [2022-03-18 04:06:38,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:06:38,358 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-18 04:06:38,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:38,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-18 04:06:38,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3491, Invalid=3819, Unknown=0, NotChecked=0, Total=7310 [2022-03-18 04:06:38,359 INFO L87 Difference]: Start difference. First operand 380 states and 421 transitions. Second operand has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-18 04:06:39,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:06:39,161 INFO L93 Difference]: Finished difference Result 394 states and 436 transitions. [2022-03-18 04:06:39,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-18 04:06:39,161 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) Word has length 383 [2022-03-18 04:06:39,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:06:39,163 INFO L225 Difference]: With dead ends: 394 [2022-03-18 04:06:39,163 INFO L226 Difference]: Without dead ends: 389 [2022-03-18 04:06:39,164 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6891, Invalid=8859, Unknown=0, NotChecked=0, Total=15750 [2022-03-18 04:06:39,164 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 148 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:06:39,165 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 396 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:06:39,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-03-18 04:06:39,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2022-03-18 04:06:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 299 states have (on average 1.140468227424749) internal successors, (341), 299 states have internal predecessors, (341), 46 states have call successors, (46), 45 states have call predecessors, (46), 43 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-18 04:06:39,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 431 transitions. [2022-03-18 04:06:39,200 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 431 transitions. Word has length 383 [2022-03-18 04:06:39,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:06:39,200 INFO L478 AbstractCegarLoop]: Abstraction has 389 states and 431 transitions. [2022-03-18 04:06:39,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-18 04:06:39,201 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 431 transitions. [2022-03-18 04:06:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-03-18 04:06:39,203 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:06:39,203 INFO L500 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 41, 41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:06:39,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-18 04:06:39,415 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 04:06:39,415 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:06:39,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:06:39,416 INFO L85 PathProgramCache]: Analyzing trace with hash 311977500, now seen corresponding path program 81 times [2022-03-18 04:06:39,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:39,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1033198744] [2022-03-18 04:06:39,416 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:06:39,416 INFO L85 PathProgramCache]: Analyzing trace with hash 311977500, now seen corresponding path program 82 times [2022-03-18 04:06:39,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:06:39,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992181048] [2022-03-18 04:06:39,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:06:39,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:06:39,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:06:39,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36136103] [2022-03-18 04:06:39,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:06:39,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:06:39,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:06:39,426 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 04:06:39,427 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 04:06:39,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:06:39,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:06:39,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-18 04:06:39,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:06:40,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7548 backedges. 82 proven. 7462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:06:40,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:06:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7548 backedges. 82 proven. 4182 refuted. 0 times theorem prover too weak. 3284 trivial. 0 not checked. [2022-03-18 04:06:42,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:06:42,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992181048] [2022-03-18 04:06:42,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:06:42,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36136103] [2022-03-18 04:06:42,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36136103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:06:42,755 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:06:42,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 88 [2022-03-18 04:06:42,756 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:06:42,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1033198744] [2022-03-18 04:06:42,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1033198744] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:06:42,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:06:42,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-18 04:06:42,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951352318] [2022-03-18 04:06:42,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:06:42,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 04:06:42,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:42,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 04:06:42,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3660, Invalid=3996, Unknown=0, NotChecked=0, Total=7656 [2022-03-18 04:06:42,757 INFO L87 Difference]: Start difference. First operand 389 states and 431 transitions. Second operand has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) [2022-03-18 04:06:43,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:06:43,607 INFO L93 Difference]: Finished difference Result 403 states and 446 transitions. [2022-03-18 04:06:43,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-18 04:06:43,607 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) Word has length 392 [2022-03-18 04:06:43,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:06:43,609 INFO L225 Difference]: With dead ends: 403 [2022-03-18 04:06:43,609 INFO L226 Difference]: Without dead ends: 398 [2022-03-18 04:06:43,611 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 697 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7227, Invalid=9285, Unknown=0, NotChecked=0, Total=16512 [2022-03-18 04:06:43,611 INFO L912 BasicCegarLoop]: 67 mSDtfsCounter, 181 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:06:43,611 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 410 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:06:43,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-03-18 04:06:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2022-03-18 04:06:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 306 states have (on average 1.1405228758169934) internal successors, (349), 306 states have internal predecessors, (349), 47 states have call successors, (47), 46 states have call predecessors, (47), 44 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-18 04:06:43,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 441 transitions. [2022-03-18 04:06:43,637 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 441 transitions. Word has length 392 [2022-03-18 04:06:43,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:06:43,638 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 441 transitions. [2022-03-18 04:06:43,638 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) [2022-03-18 04:06:43,638 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 441 transitions. [2022-03-18 04:06:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-03-18 04:06:43,640 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:06:43,640 INFO L500 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 42, 42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:06:43,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-18 04:06:43,860 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 04:06:43,861 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:06:43,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:06:43,861 INFO L85 PathProgramCache]: Analyzing trace with hash -432228138, now seen corresponding path program 83 times [2022-03-18 04:06:43,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:43,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [494213968] [2022-03-18 04:06:43,862 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:06:43,862 INFO L85 PathProgramCache]: Analyzing trace with hash -432228138, now seen corresponding path program 84 times [2022-03-18 04:06:43,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:06:43,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600259643] [2022-03-18 04:06:43,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:06:43,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:06:43,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:06:43,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115912263] [2022-03-18 04:06:43,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:06:43,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:06:43,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:06:43,889 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 04:06:43,892 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 04:06:44,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-03-18 04:06:44,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:06:44,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-18 04:06:44,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:06:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 84 proven. 7833 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:06:45,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:06:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 84 proven. 4389 refuted. 0 times theorem prover too weak. 3448 trivial. 0 not checked. [2022-03-18 04:06:47,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:06:47,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600259643] [2022-03-18 04:06:47,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:06:47,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115912263] [2022-03-18 04:06:47,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115912263] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:06:47,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:06:47,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 90 [2022-03-18 04:06:47,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:06:47,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [494213968] [2022-03-18 04:06:47,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [494213968] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:06:47,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:06:47,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-18 04:06:47,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457989816] [2022-03-18 04:06:47,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:06:47,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-18 04:06:47,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:47,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-18 04:06:47,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3833, Invalid=4177, Unknown=0, NotChecked=0, Total=8010 [2022-03-18 04:06:47,422 INFO L87 Difference]: Start difference. First operand 398 states and 441 transitions. Second operand has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) [2022-03-18 04:06:48,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:06:48,374 INFO L93 Difference]: Finished difference Result 412 states and 456 transitions. [2022-03-18 04:06:48,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-18 04:06:48,374 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) Word has length 401 [2022-03-18 04:06:48,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:06:48,375 INFO L225 Difference]: With dead ends: 412 [2022-03-18 04:06:48,375 INFO L226 Difference]: Without dead ends: 407 [2022-03-18 04:06:48,377 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7571, Invalid=9721, Unknown=0, NotChecked=0, Total=17292 [2022-03-18 04:06:48,377 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 189 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:06:48,377 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 406 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:06:48,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-03-18 04:06:48,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2022-03-18 04:06:48,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 313 states have (on average 1.1405750798722045) internal successors, (357), 313 states have internal predecessors, (357), 48 states have call successors, (48), 47 states have call predecessors, (48), 45 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-18 04:06:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 451 transitions. [2022-03-18 04:06:48,408 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 451 transitions. Word has length 401 [2022-03-18 04:06:48,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:06:48,409 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 451 transitions. [2022-03-18 04:06:48,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) [2022-03-18 04:06:48,409 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 451 transitions. [2022-03-18 04:06:48,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-03-18 04:06:48,411 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:06:48,411 INFO L500 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 43, 43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:06:48,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-18 04:06:48,627 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 04:06:48,627 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:06:48,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:06:48,628 INFO L85 PathProgramCache]: Analyzing trace with hash -290400420, now seen corresponding path program 85 times [2022-03-18 04:06:48,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:48,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1540014017] [2022-03-18 04:06:48,628 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:06:48,628 INFO L85 PathProgramCache]: Analyzing trace with hash -290400420, now seen corresponding path program 86 times [2022-03-18 04:06:48,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:06:48,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635885951] [2022-03-18 04:06:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:06:48,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:06:48,636 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:06:48,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404882823] [2022-03-18 04:06:48,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:06:48,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:06:48,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:06:48,638 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 04:06:48,638 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 04:06:48,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:06:48,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:06:48,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-18 04:06:48,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:06:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8303 backedges. 86 proven. 8213 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:06:49,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:06:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8303 backedges. 86 proven. 4601 refuted. 0 times theorem prover too weak. 3616 trivial. 0 not checked. [2022-03-18 04:06:52,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:06:52,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635885951] [2022-03-18 04:06:52,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:06:52,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404882823] [2022-03-18 04:06:52,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404882823] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:06:52,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:06:52,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 92 [2022-03-18 04:06:52,181 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:06:52,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1540014017] [2022-03-18 04:06:52,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1540014017] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:06:52,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:06:52,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-18 04:06:52,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885727649] [2022-03-18 04:06:52,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:06:52,182 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-18 04:06:52,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:52,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-18 04:06:52,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4010, Invalid=4362, Unknown=0, NotChecked=0, Total=8372 [2022-03-18 04:06:52,184 INFO L87 Difference]: Start difference. First operand 407 states and 451 transitions. Second operand has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) [2022-03-18 04:06:53,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:06:53,105 INFO L93 Difference]: Finished difference Result 421 states and 466 transitions. [2022-03-18 04:06:53,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-18 04:06:53,105 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) Word has length 410 [2022-03-18 04:06:53,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:06:53,107 INFO L225 Difference]: With dead ends: 421 [2022-03-18 04:06:53,107 INFO L226 Difference]: Without dead ends: 416 [2022-03-18 04:06:53,109 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 729 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7923, Invalid=10167, Unknown=0, NotChecked=0, Total=18090 [2022-03-18 04:06:53,109 INFO L912 BasicCegarLoop]: 69 mSDtfsCounter, 163 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:06:53,109 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 426 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:06:53,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-03-18 04:06:53,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2022-03-18 04:06:53,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 320 states have (on average 1.140625) internal successors, (365), 320 states have internal predecessors, (365), 49 states have call successors, (49), 48 states have call predecessors, (49), 46 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-18 04:06:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 461 transitions. [2022-03-18 04:06:53,139 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 461 transitions. Word has length 410 [2022-03-18 04:06:53,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:06:53,140 INFO L478 AbstractCegarLoop]: Abstraction has 416 states and 461 transitions. [2022-03-18 04:06:53,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) [2022-03-18 04:06:53,140 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 461 transitions. [2022-03-18 04:06:53,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-03-18 04:06:53,142 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:06:53,143 INFO L500 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 44, 44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:06:53,169 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 04:06:53,363 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 04:06:53,363 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:06:53,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:06:53,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1569738858, now seen corresponding path program 87 times [2022-03-18 04:06:53,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:53,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1354539524] [2022-03-18 04:06:53,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:06:53,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1569738858, now seen corresponding path program 88 times [2022-03-18 04:06:53,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:06:53,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284977615] [2022-03-18 04:06:53,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:06:53,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:06:53,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:06:53,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059030513] [2022-03-18 04:06:53,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:06:53,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:06:53,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:06:53,375 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 04:06:53,384 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 04:06:53,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:06:53,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:06:53,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-18 04:06:53,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:06:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 88 proven. 8602 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:06:54,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:06:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 88 proven. 4818 refuted. 0 times theorem prover too weak. 3788 trivial. 0 not checked. [2022-03-18 04:06:57,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:06:57,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284977615] [2022-03-18 04:06:57,146 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:06:57,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059030513] [2022-03-18 04:06:57,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059030513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:06:57,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:06:57,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2022-03-18 04:06:57,146 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:06:57,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1354539524] [2022-03-18 04:06:57,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1354539524] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:06:57,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:06:57,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-18 04:06:57,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899199060] [2022-03-18 04:06:57,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:06:57,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-18 04:06:57,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:57,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-18 04:06:57,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4191, Invalid=4551, Unknown=0, NotChecked=0, Total=8742 [2022-03-18 04:06:57,148 INFO L87 Difference]: Start difference. First operand 416 states and 461 transitions. Second operand has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) [2022-03-18 04:06:58,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:06:58,095 INFO L93 Difference]: Finished difference Result 430 states and 476 transitions. [2022-03-18 04:06:58,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-18 04:06:58,096 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) Word has length 419 [2022-03-18 04:06:58,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:06:58,097 INFO L225 Difference]: With dead ends: 430 [2022-03-18 04:06:58,097 INFO L226 Difference]: Without dead ends: 425 [2022-03-18 04:06:58,099 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 745 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8283, Invalid=10623, Unknown=0, NotChecked=0, Total=18906 [2022-03-18 04:06:58,099 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 187 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:06:58,099 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 440 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:06:58,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-18 04:06:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2022-03-18 04:06:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 327 states have (on average 1.1406727828746177) internal successors, (373), 327 states have internal predecessors, (373), 50 states have call successors, (50), 49 states have call predecessors, (50), 47 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-18 04:06:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 471 transitions. [2022-03-18 04:06:58,129 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 471 transitions. Word has length 419 [2022-03-18 04:06:58,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:06:58,130 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 471 transitions. [2022-03-18 04:06:58,130 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) [2022-03-18 04:06:58,130 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 471 transitions. [2022-03-18 04:06:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-03-18 04:06:58,132 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:06:58,133 INFO L500 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 45, 45, 45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:06:58,157 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 04:06:58,347 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 04:06:58,347 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:06:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:06:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1803061092, now seen corresponding path program 89 times [2022-03-18 04:06:58,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:06:58,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [125201658] [2022-03-18 04:06:58,348 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:06:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1803061092, now seen corresponding path program 90 times [2022-03-18 04:06:58,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:06:58,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137211788] [2022-03-18 04:06:58,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:06:58,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:06:58,359 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:06:58,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32961294] [2022-03-18 04:06:58,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:06:58,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:06:58,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:06:58,365 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 04:06:58,366 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 04:06:58,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-03-18 04:06:58,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:06:58,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-18 04:06:58,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:07:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9094 backedges. 90 proven. 9000 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:07:00,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:07:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9094 backedges. 90 proven. 5040 refuted. 0 times theorem prover too weak. 3964 trivial. 0 not checked. [2022-03-18 04:07:02,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:07:02,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137211788] [2022-03-18 04:07:02,572 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:07:02,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32961294] [2022-03-18 04:07:02,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32961294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:07:02,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:07:02,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2022-03-18 04:07:02,572 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:07:02,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [125201658] [2022-03-18 04:07:02,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [125201658] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:07:02,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:07:02,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-18 04:07:02,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446023868] [2022-03-18 04:07:02,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:07:02,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-18 04:07:02,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:02,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-18 04:07:02,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4376, Invalid=4744, Unknown=0, NotChecked=0, Total=9120 [2022-03-18 04:07:02,574 INFO L87 Difference]: Start difference. First operand 425 states and 471 transitions. Second operand has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-03-18 04:07:03,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:07:03,539 INFO L93 Difference]: Finished difference Result 439 states and 486 transitions. [2022-03-18 04:07:03,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-18 04:07:03,540 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) Word has length 428 [2022-03-18 04:07:03,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:07:03,541 INFO L225 Difference]: With dead ends: 439 [2022-03-18 04:07:03,541 INFO L226 Difference]: Without dead ends: 434 [2022-03-18 04:07:03,542 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8651, Invalid=11089, Unknown=0, NotChecked=0, Total=19740 [2022-03-18 04:07:03,542 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 206 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:07:03,542 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 454 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:07:03,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-03-18 04:07:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2022-03-18 04:07:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 334 states have (on average 1.1407185628742516) internal successors, (381), 334 states have internal predecessors, (381), 51 states have call successors, (51), 50 states have call predecessors, (51), 48 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-18 04:07:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 481 transitions. [2022-03-18 04:07:03,572 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 481 transitions. Word has length 428 [2022-03-18 04:07:03,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:07:03,573 INFO L478 AbstractCegarLoop]: Abstraction has 434 states and 481 transitions. [2022-03-18 04:07:03,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-03-18 04:07:03,573 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 481 transitions. [2022-03-18 04:07:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-03-18 04:07:03,575 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:07:03,576 INFO L500 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:07:03,583 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 04:07:03,783 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 04:07:03,783 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:07:03,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:07:03,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1876588118, now seen corresponding path program 91 times [2022-03-18 04:07:03,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:03,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [228923304] [2022-03-18 04:07:03,784 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:07:03,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1876588118, now seen corresponding path program 92 times [2022-03-18 04:07:03,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:07:03,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023691272] [2022-03-18 04:07:03,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:07:03,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:07:03,801 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:07:03,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358717068] [2022-03-18 04:07:03,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:07:03,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:07:03,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:07:03,803 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 04:07:03,805 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 04:07:03,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:07:03,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:07:03,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-18 04:07:03,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:07:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:07:05,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:07:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2022-03-18 04:07:07,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:07:07,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023691272] [2022-03-18 04:07:07,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:07:07,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358717068] [2022-03-18 04:07:07,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358717068] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:07:07,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:07:07,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-03-18 04:07:07,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:07:07,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [228923304] [2022-03-18 04:07:07,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [228923304] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:07:07,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:07:07,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-18 04:07:07,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511131138] [2022-03-18 04:07:07,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:07:07,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-18 04:07:07,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:07,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-18 04:07:07,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 04:07:07,736 INFO L87 Difference]: Start difference. First operand 434 states and 481 transitions. Second operand has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) [2022-03-18 04:07:08,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:07:08,823 INFO L93 Difference]: Finished difference Result 448 states and 496 transitions. [2022-03-18 04:07:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-18 04:07:08,823 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) Word has length 437 [2022-03-18 04:07:08,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:07:08,824 INFO L225 Difference]: With dead ends: 448 [2022-03-18 04:07:08,824 INFO L226 Difference]: Without dead ends: 443 [2022-03-18 04:07:08,826 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9027, Invalid=11565, Unknown=0, NotChecked=0, Total=20592 [2022-03-18 04:07:08,826 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 198 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:07:08,826 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 444 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:07:08,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-03-18 04:07:08,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2022-03-18 04:07:08,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 341 states have (on average 1.1407624633431086) internal successors, (389), 341 states have internal predecessors, (389), 52 states have call successors, (52), 51 states have call predecessors, (52), 49 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-03-18 04:07:08,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 491 transitions. [2022-03-18 04:07:08,857 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 491 transitions. Word has length 437 [2022-03-18 04:07:08,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:07:08,858 INFO L478 AbstractCegarLoop]: Abstraction has 443 states and 491 transitions. [2022-03-18 04:07:08,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) [2022-03-18 04:07:08,858 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 491 transitions. [2022-03-18 04:07:08,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-03-18 04:07:08,860 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:07:08,861 INFO L500 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 47, 47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:07:08,880 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 04:07:09,067 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 04:07:09,067 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:07:09,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:07:09,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1123043804, now seen corresponding path program 93 times [2022-03-18 04:07:09,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:09,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1208001044] [2022-03-18 04:07:09,068 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:07:09,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1123043804, now seen corresponding path program 94 times [2022-03-18 04:07:09,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:07:09,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106392443] [2022-03-18 04:07:09,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:07:09,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:07:09,078 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:07:09,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693978479] [2022-03-18 04:07:09,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:07:09,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:07:09,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:07:09,080 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 04:07:09,081 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 04:07:09,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:07:09,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:07:09,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-18 04:07:09,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:07:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9921 backedges. 94 proven. 9823 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:07:10,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:07:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9921 backedges. 94 proven. 5499 refuted. 0 times theorem prover too weak. 4328 trivial. 0 not checked. [2022-03-18 04:07:13,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:07:13,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106392443] [2022-03-18 04:07:13,192 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:07:13,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693978479] [2022-03-18 04:07:13,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693978479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:07:13,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:07:13,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 100 [2022-03-18 04:07:13,192 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:07:13,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1208001044] [2022-03-18 04:07:13,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1208001044] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:07:13,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:07:13,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-18 04:07:13,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628086240] [2022-03-18 04:07:13,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:07:13,193 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-18 04:07:13,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:13,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-18 04:07:13,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4758, Invalid=5142, Unknown=0, NotChecked=0, Total=9900 [2022-03-18 04:07:13,194 INFO L87 Difference]: Start difference. First operand 443 states and 491 transitions. Second operand has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) [2022-03-18 04:07:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:07:14,276 INFO L93 Difference]: Finished difference Result 457 states and 506 transitions. [2022-03-18 04:07:14,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-18 04:07:14,277 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) Word has length 446 [2022-03-18 04:07:14,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:07:14,278 INFO L225 Difference]: With dead ends: 457 [2022-03-18 04:07:14,278 INFO L226 Difference]: Without dead ends: 452 [2022-03-18 04:07:14,279 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 793 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9411, Invalid=12051, Unknown=0, NotChecked=0, Total=21462 [2022-03-18 04:07:14,280 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 209 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:07:14,280 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 464 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:07:14,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-03-18 04:07:14,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2022-03-18 04:07:14,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 348 states have (on average 1.1408045977011494) internal successors, (397), 348 states have internal predecessors, (397), 53 states have call successors, (53), 52 states have call predecessors, (53), 50 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-18 04:07:14,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 501 transitions. [2022-03-18 04:07:14,303 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 501 transitions. Word has length 446 [2022-03-18 04:07:14,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:07:14,303 INFO L478 AbstractCegarLoop]: Abstraction has 452 states and 501 transitions. [2022-03-18 04:07:14,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) [2022-03-18 04:07:14,304 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 501 transitions. [2022-03-18 04:07:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-03-18 04:07:14,306 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:07:14,306 INFO L500 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 48, 48, 48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:07:14,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-18 04:07:14,519 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 04:07:14,519 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:07:14,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:07:14,520 INFO L85 PathProgramCache]: Analyzing trace with hash 2116619542, now seen corresponding path program 95 times [2022-03-18 04:07:14,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:14,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1391440306] [2022-03-18 04:07:14,520 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:07:14,520 INFO L85 PathProgramCache]: Analyzing trace with hash 2116619542, now seen corresponding path program 96 times [2022-03-18 04:07:14,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:07:14,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077099452] [2022-03-18 04:07:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:07:14,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:07:14,529 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:07:14,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807290500] [2022-03-18 04:07:14,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:07:14,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:07:14,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:07:14,530 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 04:07:14,531 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 04:07:14,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2022-03-18 04:07:14,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:07:14,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-18 04:07:14,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:07:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10348 backedges. 96 proven. 10248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:07:16,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:07:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10348 backedges. 96 proven. 5736 refuted. 0 times theorem prover too weak. 4516 trivial. 0 not checked. [2022-03-18 04:07:18,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:07:18,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077099452] [2022-03-18 04:07:18,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:07:18,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807290500] [2022-03-18 04:07:18,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807290500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:07:18,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:07:18,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 102 [2022-03-18 04:07:18,799 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:07:18,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1391440306] [2022-03-18 04:07:18,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1391440306] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:07:18,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:07:18,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-18 04:07:18,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394713506] [2022-03-18 04:07:18,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:07:18,800 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-18 04:07:18,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:18,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-18 04:07:18,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4955, Invalid=5347, Unknown=0, NotChecked=0, Total=10302 [2022-03-18 04:07:18,802 INFO L87 Difference]: Start difference. First operand 452 states and 501 transitions. Second operand has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (53), 51 states have call predecessors, (53), 49 states have return successors, (51), 49 states have call predecessors, (51), 50 states have call successors, (51) [2022-03-18 04:07:19,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:07:19,907 INFO L93 Difference]: Finished difference Result 466 states and 516 transitions. [2022-03-18 04:07:19,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-18 04:07:19,908 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (53), 51 states have call predecessors, (53), 49 states have return successors, (51), 49 states have call predecessors, (51), 50 states have call successors, (51) Word has length 455 [2022-03-18 04:07:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:07:19,910 INFO L225 Difference]: With dead ends: 466 [2022-03-18 04:07:19,910 INFO L226 Difference]: Without dead ends: 461 [2022-03-18 04:07:19,912 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 809 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9803, Invalid=12547, Unknown=0, NotChecked=0, Total=22350 [2022-03-18 04:07:19,912 INFO L912 BasicCegarLoop]: 74 mSDtfsCounter, 134 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:07:19,913 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 490 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:07:19,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-03-18 04:07:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 461. [2022-03-18 04:07:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 355 states have (on average 1.1408450704225352) internal successors, (405), 355 states have internal predecessors, (405), 54 states have call successors, (54), 53 states have call predecessors, (54), 51 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-18 04:07:19,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 511 transitions. [2022-03-18 04:07:19,943 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 511 transitions. Word has length 455 [2022-03-18 04:07:19,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:07:19,943 INFO L478 AbstractCegarLoop]: Abstraction has 461 states and 511 transitions. [2022-03-18 04:07:19,944 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (53), 51 states have call predecessors, (53), 49 states have return successors, (51), 49 states have call predecessors, (51), 50 states have call successors, (51) [2022-03-18 04:07:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 511 transitions. [2022-03-18 04:07:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2022-03-18 04:07:19,946 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:07:19,946 INFO L500 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 49, 49, 49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:07:19,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-18 04:07:20,167 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 04:07:20,167 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:07:20,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:07:20,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1413526756, now seen corresponding path program 97 times [2022-03-18 04:07:20,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:20,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1955841164] [2022-03-18 04:07:20,168 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:07:20,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1413526756, now seen corresponding path program 98 times [2022-03-18 04:07:20,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:07:20,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289492366] [2022-03-18 04:07:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:07:20,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:07:20,198 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:07:20,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986909996] [2022-03-18 04:07:20,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:07:20,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:07:20,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:07:20,200 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 04:07:20,201 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 04:07:20,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:07:20,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:07:20,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-18 04:07:20,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:07:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 10784 backedges. 98 proven. 10682 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:07:21,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:07:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10784 backedges. 98 proven. 5978 refuted. 0 times theorem prover too weak. 4708 trivial. 0 not checked. [2022-03-18 04:07:24,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:07:24,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289492366] [2022-03-18 04:07:24,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:07:24,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986909996] [2022-03-18 04:07:24,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986909996] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:07:24,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:07:24,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 104 [2022-03-18 04:07:24,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:07:24,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1955841164] [2022-03-18 04:07:24,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1955841164] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:07:24,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:07:24,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-18 04:07:24,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394012517] [2022-03-18 04:07:24,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:07:24,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-18 04:07:24,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:24,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-18 04:07:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:07:24,652 INFO L87 Difference]: Start difference. First operand 461 states and 511 transitions. Second operand has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (54), 52 states have call predecessors, (54), 50 states have return successors, (52), 50 states have call predecessors, (52), 51 states have call successors, (52) [2022-03-18 04:07:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:07:25,958 INFO L93 Difference]: Finished difference Result 475 states and 526 transitions. [2022-03-18 04:07:25,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-18 04:07:25,958 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (54), 52 states have call predecessors, (54), 50 states have return successors, (52), 50 states have call predecessors, (52), 51 states have call successors, (52) Word has length 464 [2022-03-18 04:07:25,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:07:25,960 INFO L225 Difference]: With dead ends: 475 [2022-03-18 04:07:25,960 INFO L226 Difference]: Without dead ends: 470 [2022-03-18 04:07:25,962 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 825 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=10203, Invalid=13053, Unknown=0, NotChecked=0, Total=23256 [2022-03-18 04:07:25,962 INFO L912 BasicCegarLoop]: 75 mSDtfsCounter, 146 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:07:25,962 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 492 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:07:25,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-03-18 04:07:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2022-03-18 04:07:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 362 states have (on average 1.1408839779005524) internal successors, (413), 362 states have internal predecessors, (413), 55 states have call successors, (55), 54 states have call predecessors, (55), 52 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-18 04:07:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 521 transitions. [2022-03-18 04:07:25,995 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 521 transitions. Word has length 464 [2022-03-18 04:07:25,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:07:25,995 INFO L478 AbstractCegarLoop]: Abstraction has 470 states and 521 transitions. [2022-03-18 04:07:25,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (54), 52 states have call predecessors, (54), 50 states have return successors, (52), 50 states have call predecessors, (52), 51 states have call successors, (52) [2022-03-18 04:07:25,996 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 521 transitions. [2022-03-18 04:07:25,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2022-03-18 04:07:25,998 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:07:25,998 INFO L500 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 50, 50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:07:26,026 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 04:07:26,221 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 04:07:26,221 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:07:26,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:07:26,222 INFO L85 PathProgramCache]: Analyzing trace with hash -368610346, now seen corresponding path program 99 times [2022-03-18 04:07:26,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:26,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [263003734] [2022-03-18 04:07:26,222 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:07:26,222 INFO L85 PathProgramCache]: Analyzing trace with hash -368610346, now seen corresponding path program 100 times [2022-03-18 04:07:26,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:07:26,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282870860] [2022-03-18 04:07:26,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:07:26,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:07:26,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:07:26,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87511255] [2022-03-18 04:07:26,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:07:26,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:07:26,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:07:26,232 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 04:07:26,233 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 04:07:26,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:07:26,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:07:26,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-18 04:07:26,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:07:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11229 backedges. 100 proven. 11125 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:07:27,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:07:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11229 backedges. 100 proven. 6225 refuted. 0 times theorem prover too weak. 4904 trivial. 0 not checked. [2022-03-18 04:07:30,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:07:30,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282870860] [2022-03-18 04:07:30,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:07:30,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87511255] [2022-03-18 04:07:30,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87511255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:07:30,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:07:30,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 104 [2022-03-18 04:07:30,711 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:07:30,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [263003734] [2022-03-18 04:07:30,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [263003734] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:07:30,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:07:30,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-18 04:07:30,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712897518] [2022-03-18 04:07:30,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:07:30,712 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-18 04:07:30,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:30,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-18 04:07:30,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:07:30,713 INFO L87 Difference]: Start difference. First operand 470 states and 521 transitions. Second operand has 54 states, 54 states have (on average 6.703703703703703) internal successors, (362), 53 states have internal predecessors, (362), 53 states have call successors, (55), 53 states have call predecessors, (55), 51 states have return successors, (53), 51 states have call predecessors, (53), 52 states have call successors, (53) [2022-03-18 04:07:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:07:31,985 INFO L93 Difference]: Finished difference Result 484 states and 536 transitions. [2022-03-18 04:07:31,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-18 04:07:31,986 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 6.703703703703703) internal successors, (362), 53 states have internal predecessors, (362), 53 states have call successors, (55), 53 states have call predecessors, (55), 51 states have return successors, (53), 51 states have call predecessors, (53), 52 states have call successors, (53) Word has length 473 [2022-03-18 04:07:31,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:07:31,987 INFO L225 Difference]: With dead ends: 484 [2022-03-18 04:07:31,987 INFO L226 Difference]: Without dead ends: 479 [2022-03-18 04:07:31,989 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 842 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10306, Invalid=13256, Unknown=0, NotChecked=0, Total=23562 [2022-03-18 04:07:31,989 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 194 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:07:31,989 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 482 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:07:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-03-18 04:07:32,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2022-03-18 04:07:32,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 369 states have (on average 1.1409214092140922) internal successors, (421), 369 states have internal predecessors, (421), 56 states have call successors, (56), 55 states have call predecessors, (56), 53 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-18 04:07:32,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 531 transitions. [2022-03-18 04:07:32,013 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 531 transitions. Word has length 473 [2022-03-18 04:07:32,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:07:32,013 INFO L478 AbstractCegarLoop]: Abstraction has 479 states and 531 transitions. [2022-03-18 04:07:32,013 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 6.703703703703703) internal successors, (362), 53 states have internal predecessors, (362), 53 states have call successors, (55), 53 states have call predecessors, (55), 51 states have return successors, (53), 51 states have call predecessors, (53), 52 states have call successors, (53) [2022-03-18 04:07:32,013 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 531 transitions. [2022-03-18 04:07:32,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2022-03-18 04:07:32,016 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:07:32,016 INFO L500 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 51, 51, 51, 51, 51, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:07:32,035 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 04:07:32,223 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 04:07:32,223 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:07:32,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:07:32,224 INFO L85 PathProgramCache]: Analyzing trace with hash 868777052, now seen corresponding path program 101 times [2022-03-18 04:07:32,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:32,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1460338348] [2022-03-18 04:07:32,224 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:07:32,224 INFO L85 PathProgramCache]: Analyzing trace with hash 868777052, now seen corresponding path program 102 times [2022-03-18 04:07:32,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:07:32,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527169654] [2022-03-18 04:07:32,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:07:32,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:07:32,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:07:32,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102111467] [2022-03-18 04:07:32,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:07:32,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:07:32,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:07:32,234 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 04:07:32,234 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 04:07:32,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-03-18 04:07:32,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:07:32,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-18 04:07:32,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:07:34,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11683 backedges. 102 proven. 11577 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:07:34,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:07:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 11683 backedges. 102 proven. 6477 refuted. 0 times theorem prover too weak. 5104 trivial. 0 not checked. [2022-03-18 04:07:36,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:07:36,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527169654] [2022-03-18 04:07:36,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:07:36,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102111467] [2022-03-18 04:07:36,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102111467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:07:36,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:07:36,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 104 [2022-03-18 04:07:36,811 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:07:36,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1460338348] [2022-03-18 04:07:36,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1460338348] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:07:36,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:07:36,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-18 04:07:36,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271822327] [2022-03-18 04:07:36,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:07:36,811 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-18 04:07:36,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:36,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-18 04:07:36,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:07:36,813 INFO L87 Difference]: Start difference. First operand 479 states and 531 transitions. Second operand has 55 states, 55 states have (on average 6.709090909090909) internal successors, (369), 54 states have internal predecessors, (369), 54 states have call successors, (56), 54 states have call predecessors, (56), 52 states have return successors, (54), 52 states have call predecessors, (54), 53 states have call successors, (54) [2022-03-18 04:07:38,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:07:38,111 INFO L93 Difference]: Finished difference Result 493 states and 546 transitions. [2022-03-18 04:07:38,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-18 04:07:38,111 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 6.709090909090909) internal successors, (369), 54 states have internal predecessors, (369), 54 states have call successors, (56), 54 states have call predecessors, (56), 52 states have return successors, (54), 52 states have call predecessors, (54), 53 states have call successors, (54) Word has length 482 [2022-03-18 04:07:38,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:07:38,113 INFO L225 Difference]: With dead ends: 493 [2022-03-18 04:07:38,114 INFO L226 Difference]: Without dead ends: 488 [2022-03-18 04:07:38,115 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 860 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=10409, Invalid=13461, Unknown=0, NotChecked=0, Total=23870 [2022-03-18 04:07:38,116 INFO L912 BasicCegarLoop]: 77 mSDtfsCounter, 151 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:07:38,116 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 508 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:07:38,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-03-18 04:07:38,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 488. [2022-03-18 04:07:38,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 376 states have (on average 1.1409574468085106) internal successors, (429), 376 states have internal predecessors, (429), 57 states have call successors, (57), 56 states have call predecessors, (57), 54 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-18 04:07:38,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 541 transitions. [2022-03-18 04:07:38,151 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 541 transitions. Word has length 482 [2022-03-18 04:07:38,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:07:38,151 INFO L478 AbstractCegarLoop]: Abstraction has 488 states and 541 transitions. [2022-03-18 04:07:38,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 6.709090909090909) internal successors, (369), 54 states have internal predecessors, (369), 54 states have call successors, (56), 54 states have call predecessors, (56), 52 states have return successors, (54), 52 states have call predecessors, (54), 53 states have call successors, (54) [2022-03-18 04:07:38,152 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 541 transitions. [2022-03-18 04:07:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2022-03-18 04:07:38,154 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:07:38,155 INFO L500 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 52, 52, 52, 52, 52, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:07:38,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-18 04:07:38,379 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 04:07:38,379 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:07:38,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:07:38,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2099358358, now seen corresponding path program 103 times [2022-03-18 04:07:38,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:38,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [409605931] [2022-03-18 04:07:38,380 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:07:38,381 INFO L85 PathProgramCache]: Analyzing trace with hash 2099358358, now seen corresponding path program 104 times [2022-03-18 04:07:38,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:07:38,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333680560] [2022-03-18 04:07:38,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:07:38,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:07:38,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:07:38,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565666924] [2022-03-18 04:07:38,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:07:38,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:07:38,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:07:38,395 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 04:07:38,396 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 04:07:38,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:07:38,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:07:38,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-18 04:07:38,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:07:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12146 backedges. 104 proven. 12038 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:07:40,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:07:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12146 backedges. 104 proven. 6734 refuted. 0 times theorem prover too weak. 5308 trivial. 0 not checked. [2022-03-18 04:07:42,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:07:42,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333680560] [2022-03-18 04:07:42,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:07:42,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565666924] [2022-03-18 04:07:42,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565666924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:07:42,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:07:42,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 104 [2022-03-18 04:07:42,882 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:07:42,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [409605931] [2022-03-18 04:07:42,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [409605931] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:07:42,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:07:42,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-18 04:07:42,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975412102] [2022-03-18 04:07:42,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:07:42,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-18 04:07:42,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:42,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-18 04:07:42,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:07:42,884 INFO L87 Difference]: Start difference. First operand 488 states and 541 transitions. Second operand has 56 states, 56 states have (on average 6.714285714285714) internal successors, (376), 55 states have internal predecessors, (376), 55 states have call successors, (57), 55 states have call predecessors, (57), 53 states have return successors, (55), 53 states have call predecessors, (55), 54 states have call successors, (55) [2022-03-18 04:07:44,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:07:44,249 INFO L93 Difference]: Finished difference Result 502 states and 556 transitions. [2022-03-18 04:07:44,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-18 04:07:44,250 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 6.714285714285714) internal successors, (376), 55 states have internal predecessors, (376), 55 states have call successors, (57), 55 states have call predecessors, (57), 53 states have return successors, (55), 53 states have call predecessors, (55), 54 states have call successors, (55) Word has length 491 [2022-03-18 04:07:44,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:07:44,251 INFO L225 Difference]: With dead ends: 502 [2022-03-18 04:07:44,252 INFO L226 Difference]: Without dead ends: 497 [2022-03-18 04:07:44,253 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1033 GetRequests, 878 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10512, Invalid=13668, Unknown=0, NotChecked=0, Total=24180 [2022-03-18 04:07:44,253 INFO L912 BasicCegarLoop]: 78 mSDtfsCounter, 184 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:07:44,253 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 510 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:07:44,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-03-18 04:07:44,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2022-03-18 04:07:44,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 383 states have (on average 1.1409921671018277) internal successors, (437), 383 states have internal predecessors, (437), 58 states have call successors, (58), 57 states have call predecessors, (58), 55 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-18 04:07:44,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 551 transitions. [2022-03-18 04:07:44,279 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 551 transitions. Word has length 491 [2022-03-18 04:07:44,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:07:44,280 INFO L478 AbstractCegarLoop]: Abstraction has 497 states and 551 transitions. [2022-03-18 04:07:44,280 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 6.714285714285714) internal successors, (376), 55 states have internal predecessors, (376), 55 states have call successors, (57), 55 states have call predecessors, (57), 53 states have return successors, (55), 53 states have call predecessors, (55), 54 states have call successors, (55) [2022-03-18 04:07:44,280 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 551 transitions. [2022-03-18 04:07:44,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2022-03-18 04:07:44,283 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:07:44,283 INFO L500 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 53, 53, 53, 53, 53, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:07:44,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-18 04:07:44,499 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 04:07:44,499 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:07:44,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:07:44,500 INFO L85 PathProgramCache]: Analyzing trace with hash 853532060, now seen corresponding path program 105 times [2022-03-18 04:07:44,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:44,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1964193685] [2022-03-18 04:07:44,500 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:07:44,500 INFO L85 PathProgramCache]: Analyzing trace with hash 853532060, now seen corresponding path program 106 times [2022-03-18 04:07:44,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:07:44,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143330991] [2022-03-18 04:07:44,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:07:44,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:07:44,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:07:44,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001783112] [2022-03-18 04:07:44,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:07:44,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:07:44,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:07:44,510 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 04:07:44,511 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 04:07:44,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:07:44,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:07:44,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-18 04:07:44,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:07:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12618 backedges. 106 proven. 12508 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:07:46,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:07:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12618 backedges. 106 proven. 6996 refuted. 0 times theorem prover too weak. 5516 trivial. 0 not checked. [2022-03-18 04:07:49,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:07:49,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143330991] [2022-03-18 04:07:49,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:07:49,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001783112] [2022-03-18 04:07:49,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001783112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:07:49,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:07:49,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 104 [2022-03-18 04:07:49,003 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:07:49,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1964193685] [2022-03-18 04:07:49,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1964193685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:07:49,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:07:49,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-18 04:07:49,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091560417] [2022-03-18 04:07:49,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:07:49,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-18 04:07:49,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:49,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-18 04:07:49,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:07:49,005 INFO L87 Difference]: Start difference. First operand 497 states and 551 transitions. Second operand has 57 states, 57 states have (on average 6.719298245614035) internal successors, (383), 56 states have internal predecessors, (383), 56 states have call successors, (58), 56 states have call predecessors, (58), 54 states have return successors, (56), 54 states have call predecessors, (56), 55 states have call successors, (56) [2022-03-18 04:07:50,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:07:50,452 INFO L93 Difference]: Finished difference Result 511 states and 566 transitions. [2022-03-18 04:07:50,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-18 04:07:50,452 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 6.719298245614035) internal successors, (383), 56 states have internal predecessors, (383), 56 states have call successors, (58), 56 states have call predecessors, (58), 54 states have return successors, (56), 54 states have call predecessors, (56), 55 states have call successors, (56) Word has length 500 [2022-03-18 04:07:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:07:50,454 INFO L225 Difference]: With dead ends: 511 [2022-03-18 04:07:50,454 INFO L226 Difference]: Without dead ends: 506 [2022-03-18 04:07:50,455 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1052 GetRequests, 896 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10615, Invalid=13877, Unknown=0, NotChecked=0, Total=24492 [2022-03-18 04:07:50,455 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 207 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:07:50,456 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 524 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:07:50,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-03-18 04:07:50,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2022-03-18 04:07:50,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 390 states have (on average 1.141025641025641) internal successors, (445), 390 states have internal predecessors, (445), 59 states have call successors, (59), 58 states have call predecessors, (59), 56 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2022-03-18 04:07:50,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 561 transitions. [2022-03-18 04:07:50,485 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 561 transitions. Word has length 500 [2022-03-18 04:07:50,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:07:50,486 INFO L478 AbstractCegarLoop]: Abstraction has 506 states and 561 transitions. [2022-03-18 04:07:50,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 6.719298245614035) internal successors, (383), 56 states have internal predecessors, (383), 56 states have call successors, (58), 56 states have call predecessors, (58), 54 states have return successors, (56), 54 states have call predecessors, (56), 55 states have call successors, (56) [2022-03-18 04:07:50,486 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 561 transitions. [2022-03-18 04:07:50,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2022-03-18 04:07:50,489 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:07:50,489 INFO L500 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 54, 54, 54, 54, 54, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:07:50,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-18 04:07:50,703 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 04:07:50,703 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:07:50,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:07:50,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1847832918, now seen corresponding path program 107 times [2022-03-18 04:07:50,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:50,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [21784027] [2022-03-18 04:07:50,704 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:07:50,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1847832918, now seen corresponding path program 108 times [2022-03-18 04:07:50,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:07:50,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544063040] [2022-03-18 04:07:50,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:07:50,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:07:50,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:07:50,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892386315] [2022-03-18 04:07:50,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:07:50,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:07:50,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:07:50,714 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 04:07:50,714 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 04:07:51,123 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-03-18 04:07:51,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:07:51,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 1335 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-18 04:07:51,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:07:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13099 backedges. 108 proven. 12987 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:07:52,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:07:55,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13099 backedges. 108 proven. 7263 refuted. 0 times theorem prover too weak. 5728 trivial. 0 not checked. [2022-03-18 04:07:55,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:07:55,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544063040] [2022-03-18 04:07:55,436 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:07:55,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892386315] [2022-03-18 04:07:55,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892386315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:07:55,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:07:55,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 104 [2022-03-18 04:07:55,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:07:55,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [21784027] [2022-03-18 04:07:55,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [21784027] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:07:55,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:07:55,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-18 04:07:55,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296472802] [2022-03-18 04:07:55,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:07:55,437 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-18 04:07:55,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:55,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-18 04:07:55,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:07:55,439 INFO L87 Difference]: Start difference. First operand 506 states and 561 transitions. Second operand has 58 states, 58 states have (on average 6.724137931034483) internal successors, (390), 57 states have internal predecessors, (390), 57 states have call successors, (59), 57 states have call predecessors, (59), 55 states have return successors, (57), 55 states have call predecessors, (57), 56 states have call successors, (57) [2022-03-18 04:07:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:07:56,818 INFO L93 Difference]: Finished difference Result 520 states and 576 transitions. [2022-03-18 04:07:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-18 04:07:56,819 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 6.724137931034483) internal successors, (390), 57 states have internal predecessors, (390), 57 states have call successors, (59), 57 states have call predecessors, (59), 55 states have return successors, (57), 55 states have call predecessors, (57), 56 states have call successors, (57) Word has length 509 [2022-03-18 04:07:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:07:56,820 INFO L225 Difference]: With dead ends: 520 [2022-03-18 04:07:56,820 INFO L226 Difference]: Without dead ends: 515 [2022-03-18 04:07:56,822 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1071 GetRequests, 914 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=10718, Invalid=14088, Unknown=0, NotChecked=0, Total=24806 [2022-03-18 04:07:56,822 INFO L912 BasicCegarLoop]: 80 mSDtfsCounter, 261 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:07:56,822 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 502 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:07:56,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-03-18 04:07:56,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2022-03-18 04:07:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 397 states have (on average 1.141057934508816) internal successors, (453), 397 states have internal predecessors, (453), 60 states have call successors, (60), 59 states have call predecessors, (60), 57 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-03-18 04:07:56,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 571 transitions. [2022-03-18 04:07:56,851 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 571 transitions. Word has length 509 [2022-03-18 04:07:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:07:56,852 INFO L478 AbstractCegarLoop]: Abstraction has 515 states and 571 transitions. [2022-03-18 04:07:56,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 6.724137931034483) internal successors, (390), 57 states have internal predecessors, (390), 57 states have call successors, (59), 57 states have call predecessors, (59), 55 states have return successors, (57), 55 states have call predecessors, (57), 56 states have call successors, (57) [2022-03-18 04:07:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 571 transitions. [2022-03-18 04:07:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2022-03-18 04:07:56,855 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:07:56,856 INFO L500 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 55, 55, 55, 55, 55, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:07:56,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-18 04:07:57,079 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 04:07:57,080 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:07:57,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:07:57,080 INFO L85 PathProgramCache]: Analyzing trace with hash 869887708, now seen corresponding path program 109 times [2022-03-18 04:07:57,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:07:57,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1752738922] [2022-03-18 04:07:57,081 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:07:57,081 INFO L85 PathProgramCache]: Analyzing trace with hash 869887708, now seen corresponding path program 110 times [2022-03-18 04:07:57,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:07:57,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715206670] [2022-03-18 04:07:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:07:57,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:07:57,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:07:57,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097580642] [2022-03-18 04:07:57,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:07:57,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:07:57,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:07:57,100 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 04:07:57,101 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 04:07:57,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:07:57,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:07:57,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-18 04:07:57,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:07:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 13589 backedges. 110 proven. 13475 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:07:58,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:08:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13589 backedges. 110 proven. 7535 refuted. 0 times theorem prover too weak. 5944 trivial. 0 not checked. [2022-03-18 04:08:01,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:08:01,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715206670] [2022-03-18 04:08:01,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:08:01,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097580642] [2022-03-18 04:08:01,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097580642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:08:01,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:08:01,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 104 [2022-03-18 04:08:01,632 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:08:01,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1752738922] [2022-03-18 04:08:01,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1752738922] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:08:01,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:08:01,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-18 04:08:01,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384196611] [2022-03-18 04:08:01,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:08:01,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-18 04:08:01,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:01,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-18 04:08:01,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:08:01,634 INFO L87 Difference]: Start difference. First operand 515 states and 571 transitions. Second operand has 59 states, 59 states have (on average 6.728813559322034) internal successors, (397), 58 states have internal predecessors, (397), 58 states have call successors, (60), 58 states have call predecessors, (60), 56 states have return successors, (58), 56 states have call predecessors, (58), 57 states have call successors, (58) [2022-03-18 04:08:03,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:08:03,030 INFO L93 Difference]: Finished difference Result 529 states and 586 transitions. [2022-03-18 04:08:03,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-18 04:08:03,031 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 6.728813559322034) internal successors, (397), 58 states have internal predecessors, (397), 58 states have call successors, (60), 58 states have call predecessors, (60), 56 states have return successors, (58), 56 states have call predecessors, (58), 57 states have call successors, (58) Word has length 518 [2022-03-18 04:08:03,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:08:03,032 INFO L225 Difference]: With dead ends: 529 [2022-03-18 04:08:03,032 INFO L226 Difference]: Without dead ends: 524 [2022-03-18 04:08:03,034 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1090 GetRequests, 932 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10821, Invalid=14301, Unknown=0, NotChecked=0, Total=25122 [2022-03-18 04:08:03,034 INFO L912 BasicCegarLoop]: 81 mSDtfsCounter, 216 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:08:03,034 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 516 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:08:03,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-03-18 04:08:03,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 524. [2022-03-18 04:08:03,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 404 states have (on average 1.141089108910891) internal successors, (461), 404 states have internal predecessors, (461), 61 states have call successors, (61), 60 states have call predecessors, (61), 58 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-03-18 04:08:03,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 581 transitions. [2022-03-18 04:08:03,077 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 581 transitions. Word has length 518 [2022-03-18 04:08:03,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:08:03,077 INFO L478 AbstractCegarLoop]: Abstraction has 524 states and 581 transitions. [2022-03-18 04:08:03,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 6.728813559322034) internal successors, (397), 58 states have internal predecessors, (397), 58 states have call successors, (60), 58 states have call predecessors, (60), 56 states have return successors, (58), 56 states have call predecessors, (58), 57 states have call successors, (58) [2022-03-18 04:08:03,078 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 581 transitions. [2022-03-18 04:08:03,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-03-18 04:08:03,080 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:08:03,080 INFO L500 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 56, 56, 56, 56, 56, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:08:03,100 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 04:08:03,291 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 04:08:03,291 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:08:03,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:08:03,292 INFO L85 PathProgramCache]: Analyzing trace with hash 549029910, now seen corresponding path program 111 times [2022-03-18 04:08:03,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:03,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [934491494] [2022-03-18 04:08:03,292 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:08:03,292 INFO L85 PathProgramCache]: Analyzing trace with hash 549029910, now seen corresponding path program 112 times [2022-03-18 04:08:03,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:08:03,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275796718] [2022-03-18 04:08:03,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:08:03,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:08:03,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:08:03,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71368647] [2022-03-18 04:08:03,301 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:08:03,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:08:03,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:08:03,302 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 04:08:03,302 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 04:08:03,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:08:03,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:08:03,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 117 conjunts are in the unsatisfiable core [2022-03-18 04:08:03,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:08:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 14088 backedges. 112 proven. 13972 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:08:05,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:08:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14088 backedges. 112 proven. 7812 refuted. 0 times theorem prover too weak. 6164 trivial. 0 not checked. [2022-03-18 04:08:07,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:08:07,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275796718] [2022-03-18 04:08:07,852 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:08:07,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71368647] [2022-03-18 04:08:07,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71368647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:08:07,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:08:07,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 104 [2022-03-18 04:08:07,852 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:08:07,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [934491494] [2022-03-18 04:08:07,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [934491494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:08:07,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:08:07,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-18 04:08:07,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392833635] [2022-03-18 04:08:07,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:08:07,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-18 04:08:07,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:07,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-18 04:08:07,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:08:07,854 INFO L87 Difference]: Start difference. First operand 524 states and 581 transitions. Second operand has 60 states, 60 states have (on average 6.733333333333333) internal successors, (404), 59 states have internal predecessors, (404), 59 states have call successors, (61), 59 states have call predecessors, (61), 57 states have return successors, (59), 57 states have call predecessors, (59), 58 states have call successors, (59) [2022-03-18 04:08:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:08:09,286 INFO L93 Difference]: Finished difference Result 538 states and 596 transitions. [2022-03-18 04:08:09,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-18 04:08:09,287 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 6.733333333333333) internal successors, (404), 59 states have internal predecessors, (404), 59 states have call successors, (61), 59 states have call predecessors, (61), 57 states have return successors, (59), 57 states have call predecessors, (59), 58 states have call successors, (59) Word has length 527 [2022-03-18 04:08:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:08:09,288 INFO L225 Difference]: With dead ends: 538 [2022-03-18 04:08:09,288 INFO L226 Difference]: Without dead ends: 533 [2022-03-18 04:08:09,289 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1109 GetRequests, 950 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10924, Invalid=14516, Unknown=0, NotChecked=0, Total=25440 [2022-03-18 04:08:09,289 INFO L912 BasicCegarLoop]: 82 mSDtfsCounter, 262 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:08:09,290 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 518 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:08:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-03-18 04:08:09,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 533. [2022-03-18 04:08:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 411 states have (on average 1.1411192214111923) internal successors, (469), 411 states have internal predecessors, (469), 62 states have call successors, (62), 61 states have call predecessors, (62), 59 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2022-03-18 04:08:09,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 591 transitions. [2022-03-18 04:08:09,314 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 591 transitions. Word has length 527 [2022-03-18 04:08:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:08:09,315 INFO L478 AbstractCegarLoop]: Abstraction has 533 states and 591 transitions. [2022-03-18 04:08:09,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 6.733333333333333) internal successors, (404), 59 states have internal predecessors, (404), 59 states have call successors, (61), 59 states have call predecessors, (61), 57 states have return successors, (59), 57 states have call predecessors, (59), 58 states have call successors, (59) [2022-03-18 04:08:09,315 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 591 transitions. [2022-03-18 04:08:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-03-18 04:08:09,318 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:08:09,318 INFO L500 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 57, 57, 57, 57, 57, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:08:09,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-18 04:08:09,518 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 04:08:09,518 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:08:09,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:08:09,519 INFO L85 PathProgramCache]: Analyzing trace with hash 881405980, now seen corresponding path program 113 times [2022-03-18 04:08:09,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:09,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [956729598] [2022-03-18 04:08:09,519 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:08:09,520 INFO L85 PathProgramCache]: Analyzing trace with hash 881405980, now seen corresponding path program 114 times [2022-03-18 04:08:09,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:08:09,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734073552] [2022-03-18 04:08:09,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:08:09,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:08:09,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:08:09,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234937764] [2022-03-18 04:08:09,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:08:09,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:08:09,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:08:09,534 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 04:08:09,549 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 04:08:09,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2022-03-18 04:08:09,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:08:09,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 119 conjunts are in the unsatisfiable core [2022-03-18 04:08:09,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:08:11,677 INFO L134 CoverageAnalysis]: Checked inductivity of 14596 backedges. 114 proven. 14478 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:08:11,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:08:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 14596 backedges. 114 proven. 8094 refuted. 0 times theorem prover too weak. 6388 trivial. 0 not checked. [2022-03-18 04:08:14,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:08:14,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734073552] [2022-03-18 04:08:14,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:08:14,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234937764] [2022-03-18 04:08:14,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234937764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:08:14,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:08:14,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 104 [2022-03-18 04:08:14,346 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:08:14,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [956729598] [2022-03-18 04:08:14,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [956729598] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:08:14,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:08:14,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-18 04:08:14,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576048114] [2022-03-18 04:08:14,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:08:14,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-18 04:08:14,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:14,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-18 04:08:14,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:08:14,347 INFO L87 Difference]: Start difference. First operand 533 states and 591 transitions. Second operand has 61 states, 61 states have (on average 6.737704918032787) internal successors, (411), 60 states have internal predecessors, (411), 60 states have call successors, (62), 60 states have call predecessors, (62), 58 states have return successors, (60), 58 states have call predecessors, (60), 59 states have call successors, (60) [2022-03-18 04:08:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:08:15,849 INFO L93 Difference]: Finished difference Result 547 states and 606 transitions. [2022-03-18 04:08:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-18 04:08:15,849 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 6.737704918032787) internal successors, (411), 60 states have internal predecessors, (411), 60 states have call successors, (62), 60 states have call predecessors, (62), 58 states have return successors, (60), 58 states have call predecessors, (60), 59 states have call successors, (60) Word has length 536 [2022-03-18 04:08:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:08:15,851 INFO L225 Difference]: With dead ends: 547 [2022-03-18 04:08:15,851 INFO L226 Difference]: Without dead ends: 542 [2022-03-18 04:08:15,852 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1128 GetRequests, 968 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=11027, Invalid=14733, Unknown=0, NotChecked=0, Total=25760 [2022-03-18 04:08:15,853 INFO L912 BasicCegarLoop]: 83 mSDtfsCounter, 232 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:08:15,853 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 550 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:08:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-03-18 04:08:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2022-03-18 04:08:15,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 418 states have (on average 1.1411483253588517) internal successors, (477), 418 states have internal predecessors, (477), 63 states have call successors, (63), 62 states have call predecessors, (63), 60 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-18 04:08:15,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 601 transitions. [2022-03-18 04:08:15,879 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 601 transitions. Word has length 536 [2022-03-18 04:08:15,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:08:15,880 INFO L478 AbstractCegarLoop]: Abstraction has 542 states and 601 transitions. [2022-03-18 04:08:15,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 6.737704918032787) internal successors, (411), 60 states have internal predecessors, (411), 60 states have call successors, (62), 60 states have call predecessors, (62), 58 states have return successors, (60), 58 states have call predecessors, (60), 59 states have call successors, (60) [2022-03-18 04:08:15,880 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 601 transitions. [2022-03-18 04:08:15,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2022-03-18 04:08:15,882 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:08:15,882 INFO L500 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 58, 58, 58, 58, 58, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:08:15,889 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 04:08:16,083 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 04:08:16,083 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:08:16,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:08:16,084 INFO L85 PathProgramCache]: Analyzing trace with hash -443601194, now seen corresponding path program 115 times [2022-03-18 04:08:16,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:16,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2127341055] [2022-03-18 04:08:16,084 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:08:16,085 INFO L85 PathProgramCache]: Analyzing trace with hash -443601194, now seen corresponding path program 116 times [2022-03-18 04:08:16,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:08:16,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881114202] [2022-03-18 04:08:16,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:08:16,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:08:16,105 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:08:16,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123930568] [2022-03-18 04:08:16,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:08:16,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:08:16,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:08:16,107 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 04:08:16,108 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 04:08:16,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:08:16,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:08:16,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 121 conjunts are in the unsatisfiable core [2022-03-18 04:08:16,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:08:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 15113 backedges. 116 proven. 14993 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:08:18,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:08:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 15113 backedges. 116 proven. 8381 refuted. 0 times theorem prover too weak. 6616 trivial. 0 not checked. [2022-03-18 04:08:20,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:08:20,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881114202] [2022-03-18 04:08:20,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:08:20,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123930568] [2022-03-18 04:08:20,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123930568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:08:20,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:08:20,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 104 [2022-03-18 04:08:20,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:08:20,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2127341055] [2022-03-18 04:08:20,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2127341055] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:08:20,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:08:20,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-18 04:08:20,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681419025] [2022-03-18 04:08:20,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:08:20,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-18 04:08:20,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:20,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-18 04:08:20,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:08:20,695 INFO L87 Difference]: Start difference. First operand 542 states and 601 transitions. Second operand has 62 states, 62 states have (on average 6.741935483870968) internal successors, (418), 61 states have internal predecessors, (418), 61 states have call successors, (63), 61 states have call predecessors, (63), 59 states have return successors, (61), 59 states have call predecessors, (61), 60 states have call successors, (61) [2022-03-18 04:08:22,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:08:22,263 INFO L93 Difference]: Finished difference Result 556 states and 616 transitions. [2022-03-18 04:08:22,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-03-18 04:08:22,264 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 6.741935483870968) internal successors, (418), 61 states have internal predecessors, (418), 61 states have call successors, (63), 61 states have call predecessors, (63), 59 states have return successors, (61), 59 states have call predecessors, (61), 60 states have call successors, (61) Word has length 545 [2022-03-18 04:08:22,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:08:22,265 INFO L225 Difference]: With dead ends: 556 [2022-03-18 04:08:22,265 INFO L226 Difference]: Without dead ends: 551 [2022-03-18 04:08:22,266 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1147 GetRequests, 986 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=11130, Invalid=14952, Unknown=0, NotChecked=0, Total=26082 [2022-03-18 04:08:22,266 INFO L912 BasicCegarLoop]: 84 mSDtfsCounter, 264 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 04:08:22,267 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 546 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 04:08:22,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-03-18 04:08:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2022-03-18 04:08:22,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 425 states have (on average 1.1411764705882352) internal successors, (485), 425 states have internal predecessors, (485), 64 states have call successors, (64), 63 states have call predecessors, (64), 61 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-03-18 04:08:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 611 transitions. [2022-03-18 04:08:22,301 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 611 transitions. Word has length 545 [2022-03-18 04:08:22,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:08:22,301 INFO L478 AbstractCegarLoop]: Abstraction has 551 states and 611 transitions. [2022-03-18 04:08:22,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 6.741935483870968) internal successors, (418), 61 states have internal predecessors, (418), 61 states have call successors, (63), 61 states have call predecessors, (63), 59 states have return successors, (61), 59 states have call predecessors, (61), 60 states have call successors, (61) [2022-03-18 04:08:22,302 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 611 transitions. [2022-03-18 04:08:22,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2022-03-18 04:08:22,304 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:08:22,304 INFO L500 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 59, 59, 59, 59, 59, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:08:22,322 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 04:08:22,505 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 04:08:22,505 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:08:22,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:08:22,505 INFO L85 PathProgramCache]: Analyzing trace with hash -440196772, now seen corresponding path program 117 times [2022-03-18 04:08:22,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:22,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2127694086] [2022-03-18 04:08:22,506 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:08:22,506 INFO L85 PathProgramCache]: Analyzing trace with hash -440196772, now seen corresponding path program 118 times [2022-03-18 04:08:22,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:08:22,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191668935] [2022-03-18 04:08:22,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:08:22,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:08:22,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:08:22,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190440127] [2022-03-18 04:08:22,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:08:22,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:08:22,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:08:22,516 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 04:08:22,517 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 04:08:22,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:08:22,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:08:22,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 123 conjunts are in the unsatisfiable core [2022-03-18 04:08:22,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:08:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 15639 backedges. 118 proven. 15517 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:08:24,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:08:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 15639 backedges. 118 proven. 8673 refuted. 0 times theorem prover too weak. 6848 trivial. 0 not checked. [2022-03-18 04:08:27,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:08:27,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191668935] [2022-03-18 04:08:27,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:08:27,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190440127] [2022-03-18 04:08:27,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190440127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:08:27,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:08:27,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 104 [2022-03-18 04:08:27,128 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:08:27,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2127694086] [2022-03-18 04:08:27,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2127694086] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:08:27,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:08:27,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-18 04:08:27,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168978781] [2022-03-18 04:08:27,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:08:27,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-18 04:08:27,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:27,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-18 04:08:27,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:08:27,130 INFO L87 Difference]: Start difference. First operand 551 states and 611 transitions. Second operand has 63 states, 63 states have (on average 6.746031746031746) internal successors, (425), 62 states have internal predecessors, (425), 62 states have call successors, (64), 62 states have call predecessors, (64), 60 states have return successors, (62), 60 states have call predecessors, (62), 61 states have call successors, (62) [2022-03-18 04:08:28,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:08:28,716 INFO L93 Difference]: Finished difference Result 565 states and 626 transitions. [2022-03-18 04:08:28,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-03-18 04:08:28,717 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 6.746031746031746) internal successors, (425), 62 states have internal predecessors, (425), 62 states have call successors, (64), 62 states have call predecessors, (64), 60 states have return successors, (62), 60 states have call predecessors, (62), 61 states have call successors, (62) Word has length 554 [2022-03-18 04:08:28,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:08:28,718 INFO L225 Difference]: With dead ends: 565 [2022-03-18 04:08:28,718 INFO L226 Difference]: Without dead ends: 560 [2022-03-18 04:08:28,720 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1166 GetRequests, 1004 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=11233, Invalid=15173, Unknown=0, NotChecked=0, Total=26406 [2022-03-18 04:08:28,720 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 265 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:08:28,720 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 560 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:08:28,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-03-18 04:08:28,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2022-03-18 04:08:28,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 432 states have (on average 1.1412037037037037) internal successors, (493), 432 states have internal predecessors, (493), 65 states have call successors, (65), 64 states have call predecessors, (65), 62 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-03-18 04:08:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 621 transitions. [2022-03-18 04:08:28,757 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 621 transitions. Word has length 554 [2022-03-18 04:08:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:08:28,757 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 621 transitions. [2022-03-18 04:08:28,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 6.746031746031746) internal successors, (425), 62 states have internal predecessors, (425), 62 states have call successors, (64), 62 states have call predecessors, (64), 60 states have return successors, (62), 60 states have call predecessors, (62), 61 states have call successors, (62) [2022-03-18 04:08:28,757 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 621 transitions. [2022-03-18 04:08:28,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2022-03-18 04:08:28,760 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:08:28,760 INFO L500 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 60, 60, 60, 60, 60, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:08:28,779 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 04:08:28,963 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 04:08:28,963 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:08:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:08:28,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1169119850, now seen corresponding path program 119 times [2022-03-18 04:08:28,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:28,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1188596888] [2022-03-18 04:08:28,964 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:08:28,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1169119850, now seen corresponding path program 120 times [2022-03-18 04:08:28,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:08:28,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62638314] [2022-03-18 04:08:28,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:08:28,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:08:28,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:08:28,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089084308] [2022-03-18 04:08:28,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:08:28,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:08:28,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:08:28,975 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 04:08:28,977 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 04:08:29,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2022-03-18 04:08:29,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:08:29,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1473 conjuncts, 125 conjunts are in the unsatisfiable core [2022-03-18 04:08:29,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:08:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16174 backedges. 120 proven. 16050 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:08:31,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:08:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16174 backedges. 120 proven. 8970 refuted. 0 times theorem prover too weak. 7084 trivial. 0 not checked. [2022-03-18 04:08:33,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:08:33,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62638314] [2022-03-18 04:08:33,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:08:33,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089084308] [2022-03-18 04:08:33,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089084308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:08:33,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:08:33,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 104 [2022-03-18 04:08:33,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:08:33,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1188596888] [2022-03-18 04:08:33,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1188596888] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:08:33,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:08:33,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-18 04:08:33,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752315410] [2022-03-18 04:08:33,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:08:33,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-18 04:08:33,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:33,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-18 04:08:33,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:08:33,860 INFO L87 Difference]: Start difference. First operand 560 states and 621 transitions. Second operand has 64 states, 64 states have (on average 6.75) internal successors, (432), 63 states have internal predecessors, (432), 63 states have call successors, (65), 63 states have call predecessors, (65), 61 states have return successors, (63), 61 states have call predecessors, (63), 62 states have call successors, (63) [2022-03-18 04:08:35,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:08:35,490 INFO L93 Difference]: Finished difference Result 574 states and 636 transitions. [2022-03-18 04:08:35,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-03-18 04:08:35,491 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 6.75) internal successors, (432), 63 states have internal predecessors, (432), 63 states have call successors, (65), 63 states have call predecessors, (65), 61 states have return successors, (63), 61 states have call predecessors, (63), 62 states have call successors, (63) Word has length 563 [2022-03-18 04:08:35,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:08:35,493 INFO L225 Difference]: With dead ends: 574 [2022-03-18 04:08:35,493 INFO L226 Difference]: Without dead ends: 569 [2022-03-18 04:08:35,494 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1185 GetRequests, 1022 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=11336, Invalid=15396, Unknown=0, NotChecked=0, Total=26732 [2022-03-18 04:08:35,494 INFO L912 BasicCegarLoop]: 86 mSDtfsCounter, 264 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:08:35,494 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 550 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:08:35,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-03-18 04:08:35,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2022-03-18 04:08:35,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 439 states have (on average 1.14123006833713) internal successors, (501), 439 states have internal predecessors, (501), 66 states have call successors, (66), 65 states have call predecessors, (66), 63 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-03-18 04:08:35,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 631 transitions. [2022-03-18 04:08:35,523 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 631 transitions. Word has length 563 [2022-03-18 04:08:35,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:08:35,523 INFO L478 AbstractCegarLoop]: Abstraction has 569 states and 631 transitions. [2022-03-18 04:08:35,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 6.75) internal successors, (432), 63 states have internal predecessors, (432), 63 states have call successors, (65), 63 states have call predecessors, (65), 61 states have return successors, (63), 61 states have call predecessors, (63), 62 states have call successors, (63) [2022-03-18 04:08:35,523 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 631 transitions. [2022-03-18 04:08:35,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2022-03-18 04:08:35,526 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:08:35,526 INFO L500 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 61, 61, 61, 61, 61, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:08:35,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-18 04:08:35,727 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 04:08:35,727 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:08:35,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:08:35,727 INFO L85 PathProgramCache]: Analyzing trace with hash -346340708, now seen corresponding path program 121 times [2022-03-18 04:08:35,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:35,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1572761223] [2022-03-18 04:08:35,728 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:08:35,728 INFO L85 PathProgramCache]: Analyzing trace with hash -346340708, now seen corresponding path program 122 times [2022-03-18 04:08:35,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:08:35,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453935439] [2022-03-18 04:08:35,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:08:35,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:08:35,737 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:08:35,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303343209] [2022-03-18 04:08:35,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:08:35,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:08:35,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:08:35,739 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 04:08:35,741 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 04:08:35,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:08:35,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:08:35,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 127 conjunts are in the unsatisfiable core [2022-03-18 04:08:35,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:08:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16718 backedges. 122 proven. 16592 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:08:37,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:08:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16718 backedges. 122 proven. 9272 refuted. 0 times theorem prover too weak. 7324 trivial. 0 not checked. [2022-03-18 04:08:40,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:08:40,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453935439] [2022-03-18 04:08:40,472 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:08:40,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303343209] [2022-03-18 04:08:40,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303343209] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:08:40,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:08:40,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 104 [2022-03-18 04:08:40,472 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:08:40,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1572761223] [2022-03-18 04:08:40,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1572761223] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:08:40,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:08:40,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-18 04:08:40,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697643079] [2022-03-18 04:08:40,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:08:40,473 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-18 04:08:40,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:40,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-18 04:08:40,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:08:40,475 INFO L87 Difference]: Start difference. First operand 569 states and 631 transitions. Second operand has 65 states, 65 states have (on average 6.753846153846154) internal successors, (439), 64 states have internal predecessors, (439), 64 states have call successors, (66), 64 states have call predecessors, (66), 62 states have return successors, (64), 62 states have call predecessors, (64), 63 states have call successors, (64) [2022-03-18 04:08:42,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:08:42,159 INFO L93 Difference]: Finished difference Result 583 states and 646 transitions. [2022-03-18 04:08:42,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-18 04:08:42,160 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 6.753846153846154) internal successors, (439), 64 states have internal predecessors, (439), 64 states have call successors, (66), 64 states have call predecessors, (66), 62 states have return successors, (64), 62 states have call predecessors, (64), 63 states have call successors, (64) Word has length 572 [2022-03-18 04:08:42,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:08:42,161 INFO L225 Difference]: With dead ends: 583 [2022-03-18 04:08:42,161 INFO L226 Difference]: Without dead ends: 578 [2022-03-18 04:08:42,162 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1204 GetRequests, 1040 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=11439, Invalid=15621, Unknown=0, NotChecked=0, Total=27060 [2022-03-18 04:08:42,163 INFO L912 BasicCegarLoop]: 87 mSDtfsCounter, 213 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:08:42,163 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 582 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:08:42,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-03-18 04:08:42,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2022-03-18 04:08:42,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 446 states have (on average 1.141255605381166) internal successors, (509), 446 states have internal predecessors, (509), 67 states have call successors, (67), 66 states have call predecessors, (67), 64 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2022-03-18 04:08:42,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 641 transitions. [2022-03-18 04:08:42,194 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 641 transitions. Word has length 572 [2022-03-18 04:08:42,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:08:42,194 INFO L478 AbstractCegarLoop]: Abstraction has 578 states and 641 transitions. [2022-03-18 04:08:42,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 6.753846153846154) internal successors, (439), 64 states have internal predecessors, (439), 64 states have call successors, (66), 64 states have call predecessors, (66), 62 states have return successors, (64), 62 states have call predecessors, (64), 63 states have call successors, (64) [2022-03-18 04:08:42,195 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 641 transitions. [2022-03-18 04:08:42,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2022-03-18 04:08:42,197 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:08:42,197 INFO L500 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 62, 62, 62, 62, 62, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:08:42,215 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 04:08:42,398 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 04:08:42,398 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:08:42,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:08:42,398 INFO L85 PathProgramCache]: Analyzing trace with hash 162131030, now seen corresponding path program 123 times [2022-03-18 04:08:42,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:42,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [208382625] [2022-03-18 04:08:42,399 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:08:42,399 INFO L85 PathProgramCache]: Analyzing trace with hash 162131030, now seen corresponding path program 124 times [2022-03-18 04:08:42,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:08:42,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009086199] [2022-03-18 04:08:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:08:42,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:08:42,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:08:42,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426908089] [2022-03-18 04:08:42,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:08:42,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:08:42,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:08:42,410 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 04:08:42,411 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 04:08:42,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:08:42,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:08:42,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 1519 conjuncts, 129 conjunts are in the unsatisfiable core [2022-03-18 04:08:42,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:08:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17271 backedges. 124 proven. 17143 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:08:44,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:08:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 17271 backedges. 124 proven. 9579 refuted. 0 times theorem prover too weak. 7568 trivial. 0 not checked. [2022-03-18 04:08:47,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:08:47,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009086199] [2022-03-18 04:08:47,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:08:47,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426908089] [2022-03-18 04:08:47,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426908089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:08:47,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:08:47,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 104 [2022-03-18 04:08:47,095 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:08:47,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [208382625] [2022-03-18 04:08:47,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [208382625] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:08:47,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:08:47,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-18 04:08:47,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154639899] [2022-03-18 04:08:47,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:08:47,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-18 04:08:47,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:47,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-18 04:08:47,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:08:47,097 INFO L87 Difference]: Start difference. First operand 578 states and 641 transitions. Second operand has 66 states, 66 states have (on average 6.757575757575758) internal successors, (446), 65 states have internal predecessors, (446), 65 states have call successors, (67), 65 states have call predecessors, (67), 63 states have return successors, (65), 63 states have call predecessors, (65), 64 states have call successors, (65) [2022-03-18 04:08:48,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:08:48,875 INFO L93 Difference]: Finished difference Result 592 states and 656 transitions. [2022-03-18 04:08:48,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-03-18 04:08:48,875 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 6.757575757575758) internal successors, (446), 65 states have internal predecessors, (446), 65 states have call successors, (67), 65 states have call predecessors, (67), 63 states have return successors, (65), 63 states have call predecessors, (65), 64 states have call successors, (65) Word has length 581 [2022-03-18 04:08:48,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:08:48,877 INFO L225 Difference]: With dead ends: 592 [2022-03-18 04:08:48,877 INFO L226 Difference]: Without dead ends: 587 [2022-03-18 04:08:48,878 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1223 GetRequests, 1058 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2089 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=11542, Invalid=15848, Unknown=0, NotChecked=0, Total=27390 [2022-03-18 04:08:48,878 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 211 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:08:48,878 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 584 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:08:48,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-03-18 04:08:48,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2022-03-18 04:08:48,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 453 states have (on average 1.141280353200883) internal successors, (517), 453 states have internal predecessors, (517), 68 states have call successors, (68), 67 states have call predecessors, (68), 65 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-03-18 04:08:48,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 651 transitions. [2022-03-18 04:08:48,914 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 651 transitions. Word has length 581 [2022-03-18 04:08:48,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:08:48,914 INFO L478 AbstractCegarLoop]: Abstraction has 587 states and 651 transitions. [2022-03-18 04:08:48,915 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 6.757575757575758) internal successors, (446), 65 states have internal predecessors, (446), 65 states have call successors, (67), 65 states have call predecessors, (67), 63 states have return successors, (65), 63 states have call predecessors, (65), 64 states have call successors, (65) [2022-03-18 04:08:48,915 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 651 transitions. [2022-03-18 04:08:48,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2022-03-18 04:08:48,917 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:08:48,918 INFO L500 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 63, 63, 63, 63, 63, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:08:48,936 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 04:08:49,118 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 04:08:49,118 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:08:49,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:08:49,118 INFO L85 PathProgramCache]: Analyzing trace with hash 472224732, now seen corresponding path program 125 times [2022-03-18 04:08:49,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:49,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [486265974] [2022-03-18 04:08:49,119 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:08:49,119 INFO L85 PathProgramCache]: Analyzing trace with hash 472224732, now seen corresponding path program 126 times [2022-03-18 04:08:49,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:08:49,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656365739] [2022-03-18 04:08:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:08:49,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:08:49,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:08:49,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18379791] [2022-03-18 04:08:49,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:08:49,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:08:49,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:08:49,130 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 04:08:49,132 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 04:08:49,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2022-03-18 04:08:49,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:08:49,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 131 conjunts are in the unsatisfiable core [2022-03-18 04:08:49,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:08:51,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17833 backedges. 126 proven. 17703 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:08:51,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:08:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17833 backedges. 126 proven. 9891 refuted. 0 times theorem prover too weak. 7816 trivial. 0 not checked. [2022-03-18 04:08:54,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:08:54,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656365739] [2022-03-18 04:08:54,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:08:54,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18379791] [2022-03-18 04:08:54,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18379791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:08:54,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:08:54,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 104 [2022-03-18 04:08:54,103 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:08:54,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [486265974] [2022-03-18 04:08:54,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [486265974] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:08:54,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:08:54,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-18 04:08:54,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689796127] [2022-03-18 04:08:54,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:08:54,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-18 04:08:54,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:54,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-18 04:08:54,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:08:54,105 INFO L87 Difference]: Start difference. First operand 587 states and 651 transitions. Second operand has 67 states, 67 states have (on average 6.7611940298507465) internal successors, (453), 66 states have internal predecessors, (453), 66 states have call successors, (68), 66 states have call predecessors, (68), 64 states have return successors, (66), 64 states have call predecessors, (66), 65 states have call successors, (66) [2022-03-18 04:08:55,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:08:55,882 INFO L93 Difference]: Finished difference Result 601 states and 666 transitions. [2022-03-18 04:08:55,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-03-18 04:08:55,883 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 6.7611940298507465) internal successors, (453), 66 states have internal predecessors, (453), 66 states have call successors, (68), 66 states have call predecessors, (68), 64 states have return successors, (66), 64 states have call predecessors, (66), 65 states have call successors, (66) Word has length 590 [2022-03-18 04:08:55,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:08:55,885 INFO L225 Difference]: With dead ends: 601 [2022-03-18 04:08:55,885 INFO L226 Difference]: Without dead ends: 596 [2022-03-18 04:08:55,886 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1242 GetRequests, 1076 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2151 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=11645, Invalid=16077, Unknown=0, NotChecked=0, Total=27722 [2022-03-18 04:08:55,886 INFO L912 BasicCegarLoop]: 89 mSDtfsCounter, 217 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:08:55,886 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 610 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:08:55,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-03-18 04:08:55,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2022-03-18 04:08:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 460 states have (on average 1.141304347826087) internal successors, (525), 460 states have internal predecessors, (525), 69 states have call successors, (69), 68 states have call predecessors, (69), 66 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-03-18 04:08:55,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 661 transitions. [2022-03-18 04:08:55,922 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 661 transitions. Word has length 590 [2022-03-18 04:08:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:08:55,923 INFO L478 AbstractCegarLoop]: Abstraction has 596 states and 661 transitions. [2022-03-18 04:08:55,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 6.7611940298507465) internal successors, (453), 66 states have internal predecessors, (453), 66 states have call successors, (68), 66 states have call predecessors, (68), 64 states have return successors, (66), 64 states have call predecessors, (66), 65 states have call successors, (66) [2022-03-18 04:08:55,923 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 661 transitions. [2022-03-18 04:08:55,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 600 [2022-03-18 04:08:55,926 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:08:55,926 INFO L500 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 64, 64, 64, 64, 64, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:08:55,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-18 04:08:56,127 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 04:08:56,127 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:08:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:08:56,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1799815958, now seen corresponding path program 127 times [2022-03-18 04:08:56,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:08:56,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [892938967] [2022-03-18 04:08:56,128 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:08:56,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1799815958, now seen corresponding path program 128 times [2022-03-18 04:08:56,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:08:56,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918443854] [2022-03-18 04:08:56,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:08:56,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:08:56,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:08:56,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284158432] [2022-03-18 04:08:56,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:08:56,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:08:56,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:08:56,139 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 04:08:56,140 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 04:08:56,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:08:56,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:08:56,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 1565 conjuncts, 133 conjunts are in the unsatisfiable core [2022-03-18 04:08:56,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:08:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18404 backedges. 128 proven. 18272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:08:58,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:09:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18404 backedges. 128 proven. 10208 refuted. 0 times theorem prover too weak. 8068 trivial. 0 not checked. [2022-03-18 04:09:00,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:09:00,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918443854] [2022-03-18 04:09:00,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:09:00,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284158432] [2022-03-18 04:09:00,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284158432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:09:00,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:09:00,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 104 [2022-03-18 04:09:00,870 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:09:00,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [892938967] [2022-03-18 04:09:00,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [892938967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:09:00,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:09:00,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-18 04:09:00,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656765827] [2022-03-18 04:09:00,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:09:00,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-18 04:09:00,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:09:00,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-18 04:09:00,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:09:00,872 INFO L87 Difference]: Start difference. First operand 596 states and 661 transitions. Second operand has 68 states, 68 states have (on average 6.764705882352941) internal successors, (460), 67 states have internal predecessors, (460), 67 states have call successors, (69), 67 states have call predecessors, (69), 65 states have return successors, (67), 65 states have call predecessors, (67), 66 states have call successors, (67) [2022-03-18 04:09:02,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:09:02,739 INFO L93 Difference]: Finished difference Result 610 states and 676 transitions. [2022-03-18 04:09:02,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-18 04:09:02,740 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 6.764705882352941) internal successors, (460), 67 states have internal predecessors, (460), 67 states have call successors, (69), 67 states have call predecessors, (69), 65 states have return successors, (67), 65 states have call predecessors, (67), 66 states have call successors, (67) Word has length 599 [2022-03-18 04:09:02,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:09:02,741 INFO L225 Difference]: With dead ends: 610 [2022-03-18 04:09:02,741 INFO L226 Difference]: Without dead ends: 605 [2022-03-18 04:09:02,743 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1261 GetRequests, 1094 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11748, Invalid=16308, Unknown=0, NotChecked=0, Total=28056 [2022-03-18 04:09:02,743 INFO L912 BasicCegarLoop]: 90 mSDtfsCounter, 243 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:09:02,743 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 594 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:09:02,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-03-18 04:09:02,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2022-03-18 04:09:02,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 467 states have (on average 1.1413276231263383) internal successors, (533), 467 states have internal predecessors, (533), 70 states have call successors, (70), 69 states have call predecessors, (70), 67 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2022-03-18 04:09:02,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 671 transitions. [2022-03-18 04:09:02,784 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 671 transitions. Word has length 599 [2022-03-18 04:09:02,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:09:02,784 INFO L478 AbstractCegarLoop]: Abstraction has 605 states and 671 transitions. [2022-03-18 04:09:02,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 6.764705882352941) internal successors, (460), 67 states have internal predecessors, (460), 67 states have call successors, (69), 67 states have call predecessors, (69), 65 states have return successors, (67), 65 states have call predecessors, (67), 66 states have call successors, (67) [2022-03-18 04:09:02,785 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 671 transitions. [2022-03-18 04:09:02,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2022-03-18 04:09:02,787 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:09:02,788 INFO L500 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 65, 65, 65, 65, 65, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:09:02,806 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 04:09:02,988 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 04:09:02,988 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:09:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:09:02,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1040837348, now seen corresponding path program 129 times [2022-03-18 04:09:02,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:09:02,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1229225543] [2022-03-18 04:09:02,989 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:09:02,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1040837348, now seen corresponding path program 130 times [2022-03-18 04:09:02,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:09:02,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030124098] [2022-03-18 04:09:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:09:02,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:09:03,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:09:03,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [730521615] [2022-03-18 04:09:03,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:09:03,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:09:03,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:09:03,001 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 04:09:03,002 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 04:09:03,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:09:03,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:09:03,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 135 conjunts are in the unsatisfiable core [2022-03-18 04:09:03,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:09:05,293 INFO L134 CoverageAnalysis]: Checked inductivity of 18984 backedges. 130 proven. 18850 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:09:05,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:09:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 18984 backedges. 130 proven. 10530 refuted. 0 times theorem prover too weak. 8324 trivial. 0 not checked. [2022-03-18 04:09:07,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:09:07,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030124098] [2022-03-18 04:09:07,763 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:09:07,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730521615] [2022-03-18 04:09:07,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730521615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:09:07,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:09:07,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 104 [2022-03-18 04:09:07,764 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:09:07,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1229225543] [2022-03-18 04:09:07,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1229225543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:09:07,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:09:07,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-18 04:09:07,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244873077] [2022-03-18 04:09:07,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:09:07,765 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-18 04:09:07,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:09:07,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-18 04:09:07,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:09:07,766 INFO L87 Difference]: Start difference. First operand 605 states and 671 transitions. Second operand has 69 states, 69 states have (on average 6.768115942028985) internal successors, (467), 68 states have internal predecessors, (467), 68 states have call successors, (70), 68 states have call predecessors, (70), 66 states have return successors, (68), 66 states have call predecessors, (68), 67 states have call successors, (68) [2022-03-18 04:09:09,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:09:09,703 INFO L93 Difference]: Finished difference Result 619 states and 686 transitions. [2022-03-18 04:09:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-03-18 04:09:09,703 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 6.768115942028985) internal successors, (467), 68 states have internal predecessors, (467), 68 states have call successors, (70), 68 states have call predecessors, (70), 66 states have return successors, (68), 66 states have call predecessors, (68), 67 states have call successors, (68) Word has length 608 [2022-03-18 04:09:09,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:09:09,705 INFO L225 Difference]: With dead ends: 619 [2022-03-18 04:09:09,705 INFO L226 Difference]: Without dead ends: 614 [2022-03-18 04:09:09,707 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1280 GetRequests, 1112 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11851, Invalid=16541, Unknown=0, NotChecked=0, Total=28392 [2022-03-18 04:09:09,707 INFO L912 BasicCegarLoop]: 91 mSDtfsCounter, 205 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:09:09,707 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 638 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:09:09,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-03-18 04:09:09,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2022-03-18 04:09:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 474 states have (on average 1.141350210970464) internal successors, (541), 474 states have internal predecessors, (541), 71 states have call successors, (71), 70 states have call predecessors, (71), 68 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-18 04:09:09,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 681 transitions. [2022-03-18 04:09:09,751 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 681 transitions. Word has length 608 [2022-03-18 04:09:09,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:09:09,752 INFO L478 AbstractCegarLoop]: Abstraction has 614 states and 681 transitions. [2022-03-18 04:09:09,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 6.768115942028985) internal successors, (467), 68 states have internal predecessors, (467), 68 states have call successors, (70), 68 states have call predecessors, (70), 66 states have return successors, (68), 66 states have call predecessors, (68), 67 states have call successors, (68) [2022-03-18 04:09:09,752 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 681 transitions. [2022-03-18 04:09:09,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2022-03-18 04:09:09,756 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:09:09,756 INFO L500 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 66, 66, 66, 66, 66, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:09:09,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-18 04:09:09,975 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 04:09:09,975 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:09:09,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:09:09,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1674832342, now seen corresponding path program 131 times [2022-03-18 04:09:09,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:09:09,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1627959650] [2022-03-18 04:09:09,976 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:09:09,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1674832342, now seen corresponding path program 132 times [2022-03-18 04:09:09,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:09:09,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712204775] [2022-03-18 04:09:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:09:09,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:09:09,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:09:09,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906094140] [2022-03-18 04:09:09,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:09:09,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:09:09,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:09:09,989 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 04:09:09,989 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 04:09:10,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2022-03-18 04:09:10,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:09:10,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 1611 conjuncts, 137 conjunts are in the unsatisfiable core [2022-03-18 04:09:10,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:09:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 19573 backedges. 132 proven. 19437 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:09:12,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:09:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 19573 backedges. 132 proven. 10857 refuted. 0 times theorem prover too weak. 8584 trivial. 0 not checked. [2022-03-18 04:09:15,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:09:15,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712204775] [2022-03-18 04:09:15,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:09:15,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906094140] [2022-03-18 04:09:15,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906094140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:09:15,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:09:15,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 104 [2022-03-18 04:09:15,011 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:09:15,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1627959650] [2022-03-18 04:09:15,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1627959650] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:09:15,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:09:15,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-18 04:09:15,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447343418] [2022-03-18 04:09:15,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:09:15,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-18 04:09:15,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:09:15,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-18 04:09:15,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:09:15,013 INFO L87 Difference]: Start difference. First operand 614 states and 681 transitions. Second operand has 70 states, 70 states have (on average 6.771428571428571) internal successors, (474), 69 states have internal predecessors, (474), 69 states have call successors, (71), 69 states have call predecessors, (71), 67 states have return successors, (69), 67 states have call predecessors, (69), 68 states have call successors, (69) [2022-03-18 04:09:16,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:09:16,952 INFO L93 Difference]: Finished difference Result 628 states and 696 transitions. [2022-03-18 04:09:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-03-18 04:09:16,953 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.771428571428571) internal successors, (474), 69 states have internal predecessors, (474), 69 states have call successors, (71), 69 states have call predecessors, (71), 67 states have return successors, (69), 67 states have call predecessors, (69), 68 states have call successors, (69) Word has length 617 [2022-03-18 04:09:16,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:09:16,955 INFO L225 Difference]: With dead ends: 628 [2022-03-18 04:09:16,955 INFO L226 Difference]: Without dead ends: 623 [2022-03-18 04:09:16,956 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1299 GetRequests, 1130 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=11954, Invalid=16776, Unknown=0, NotChecked=0, Total=28730 [2022-03-18 04:09:16,956 INFO L912 BasicCegarLoop]: 92 mSDtfsCounter, 302 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:09:16,956 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 616 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:09:16,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-03-18 04:09:17,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2022-03-18 04:09:17,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 481 states have (on average 1.1413721413721414) internal successors, (549), 481 states have internal predecessors, (549), 72 states have call successors, (72), 71 states have call predecessors, (72), 69 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-03-18 04:09:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 691 transitions. [2022-03-18 04:09:17,003 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 691 transitions. Word has length 617 [2022-03-18 04:09:17,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:09:17,003 INFO L478 AbstractCegarLoop]: Abstraction has 623 states and 691 transitions. [2022-03-18 04:09:17,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 6.771428571428571) internal successors, (474), 69 states have internal predecessors, (474), 69 states have call successors, (71), 69 states have call predecessors, (71), 67 states have return successors, (69), 67 states have call predecessors, (69), 68 states have call successors, (69) [2022-03-18 04:09:17,004 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 691 transitions. [2022-03-18 04:09:17,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2022-03-18 04:09:17,007 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:09:17,008 INFO L500 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 67, 67, 67, 67, 67, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:09:17,015 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 04:09:17,211 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 04:09:17,211 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:09:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:09:17,211 INFO L85 PathProgramCache]: Analyzing trace with hash -643774884, now seen corresponding path program 133 times [2022-03-18 04:09:17,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:09:17,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [430272031] [2022-03-18 04:09:17,212 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:09:17,212 INFO L85 PathProgramCache]: Analyzing trace with hash -643774884, now seen corresponding path program 134 times [2022-03-18 04:09:17,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:09:17,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970605879] [2022-03-18 04:09:17,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:09:17,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:09:17,225 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:09:17,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943653613] [2022-03-18 04:09:17,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:09:17,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:09:17,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:09:17,227 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 04:09:17,228 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 04:09:17,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:09:17,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:09:17,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 1634 conjuncts, 139 conjunts are in the unsatisfiable core [2022-03-18 04:09:17,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:09:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20171 backedges. 134 proven. 20033 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:09:19,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:09:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 20171 backedges. 134 proven. 11189 refuted. 0 times theorem prover too weak. 8848 trivial. 0 not checked. [2022-03-18 04:09:22,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:09:22,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970605879] [2022-03-18 04:09:22,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:09:22,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943653613] [2022-03-18 04:09:22,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943653613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:09:22,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:09:22,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 104 [2022-03-18 04:09:22,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:09:22,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [430272031] [2022-03-18 04:09:22,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [430272031] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:09:22,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:09:22,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-18 04:09:22,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731860252] [2022-03-18 04:09:22,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:09:22,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-18 04:09:22,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:09:22,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-18 04:09:22,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:09:22,020 INFO L87 Difference]: Start difference. First operand 623 states and 691 transitions. Second operand has 71 states, 71 states have (on average 6.774647887323944) internal successors, (481), 70 states have internal predecessors, (481), 70 states have call successors, (72), 70 states have call predecessors, (72), 68 states have return successors, (70), 68 states have call predecessors, (70), 69 states have call successors, (70) [2022-03-18 04:09:24,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:09:24,003 INFO L93 Difference]: Finished difference Result 637 states and 706 transitions. [2022-03-18 04:09:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-03-18 04:09:24,004 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.774647887323944) internal successors, (481), 70 states have internal predecessors, (481), 70 states have call successors, (72), 70 states have call predecessors, (72), 68 states have return successors, (70), 68 states have call predecessors, (70), 69 states have call successors, (70) Word has length 626 [2022-03-18 04:09:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:09:24,005 INFO L225 Difference]: With dead ends: 637 [2022-03-18 04:09:24,005 INFO L226 Difference]: Without dead ends: 632 [2022-03-18 04:09:24,007 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1318 GetRequests, 1148 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=12057, Invalid=17013, Unknown=0, NotChecked=0, Total=29070 [2022-03-18 04:09:24,007 INFO L912 BasicCegarLoop]: 93 mSDtfsCounter, 261 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:09:24,007 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 624 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:09:24,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-03-18 04:09:24,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 632. [2022-03-18 04:09:24,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 488 states have (on average 1.1413934426229508) internal successors, (557), 488 states have internal predecessors, (557), 73 states have call successors, (73), 72 states have call predecessors, (73), 70 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-03-18 04:09:24,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 701 transitions. [2022-03-18 04:09:24,049 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 701 transitions. Word has length 626 [2022-03-18 04:09:24,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:09:24,049 INFO L478 AbstractCegarLoop]: Abstraction has 632 states and 701 transitions. [2022-03-18 04:09:24,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 6.774647887323944) internal successors, (481), 70 states have internal predecessors, (481), 70 states have call successors, (72), 70 states have call predecessors, (72), 68 states have return successors, (70), 68 states have call predecessors, (70), 69 states have call successors, (70) [2022-03-18 04:09:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 701 transitions. [2022-03-18 04:09:24,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 636 [2022-03-18 04:09:24,052 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:09:24,052 INFO L500 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 68, 68, 68, 68, 68, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:09:24,070 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 04:09:24,253 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 04:09:24,253 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:09:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:09:24,253 INFO L85 PathProgramCache]: Analyzing trace with hash 620535958, now seen corresponding path program 135 times [2022-03-18 04:09:24,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:09:24,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1603860882] [2022-03-18 04:09:24,254 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:09:24,254 INFO L85 PathProgramCache]: Analyzing trace with hash 620535958, now seen corresponding path program 136 times [2022-03-18 04:09:24,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:09:24,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116110087] [2022-03-18 04:09:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:09:24,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:09:24,268 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:09:24,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474179951] [2022-03-18 04:09:24,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:09:24,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:09:24,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:09:24,269 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 04:09:24,270 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 04:09:24,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:09:24,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:09:24,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 141 conjunts are in the unsatisfiable core [2022-03-18 04:09:24,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:09:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20778 backedges. 136 proven. 20638 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:09:26,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:09:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20778 backedges. 136 proven. 11526 refuted. 0 times theorem prover too weak. 9116 trivial. 0 not checked. [2022-03-18 04:09:29,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:09:29,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116110087] [2022-03-18 04:09:29,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:09:29,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474179951] [2022-03-18 04:09:29,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474179951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:09:29,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:09:29,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 104 [2022-03-18 04:09:29,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:09:29,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1603860882] [2022-03-18 04:09:29,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1603860882] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:09:29,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:09:29,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-18 04:09:29,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889857201] [2022-03-18 04:09:29,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:09:29,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-18 04:09:29,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:09:29,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-18 04:09:29,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:09:29,124 INFO L87 Difference]: Start difference. First operand 632 states and 701 transitions. Second operand has 72 states, 72 states have (on average 6.777777777777778) internal successors, (488), 71 states have internal predecessors, (488), 71 states have call successors, (73), 71 states have call predecessors, (73), 69 states have return successors, (71), 69 states have call predecessors, (71), 70 states have call successors, (71) [2022-03-18 04:09:31,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:09:31,190 INFO L93 Difference]: Finished difference Result 646 states and 716 transitions. [2022-03-18 04:09:31,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-03-18 04:09:31,190 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 6.777777777777778) internal successors, (488), 71 states have internal predecessors, (488), 71 states have call successors, (73), 71 states have call predecessors, (73), 69 states have return successors, (71), 69 states have call predecessors, (71), 70 states have call successors, (71) Word has length 635 [2022-03-18 04:09:31,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:09:31,197 INFO L225 Difference]: With dead ends: 646 [2022-03-18 04:09:31,197 INFO L226 Difference]: Without dead ends: 641 [2022-03-18 04:09:31,198 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1337 GetRequests, 1166 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=12160, Invalid=17252, Unknown=0, NotChecked=0, Total=29412 [2022-03-18 04:09:31,198 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 263 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:09:31,198 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 650 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:09:31,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-03-18 04:09:31,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 641. [2022-03-18 04:09:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 495 states have (on average 1.1414141414141414) internal successors, (565), 495 states have internal predecessors, (565), 74 states have call successors, (74), 73 states have call predecessors, (74), 71 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-18 04:09:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 711 transitions. [2022-03-18 04:09:31,230 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 711 transitions. Word has length 635 [2022-03-18 04:09:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:09:31,230 INFO L478 AbstractCegarLoop]: Abstraction has 641 states and 711 transitions. [2022-03-18 04:09:31,231 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 6.777777777777778) internal successors, (488), 71 states have internal predecessors, (488), 71 states have call successors, (73), 71 states have call predecessors, (73), 69 states have return successors, (71), 69 states have call predecessors, (71), 70 states have call successors, (71) [2022-03-18 04:09:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 711 transitions. [2022-03-18 04:09:31,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2022-03-18 04:09:31,235 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:09:31,235 INFO L500 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 69, 69, 69, 69, 69, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:09:31,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-18 04:09:31,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:09:31,451 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:09:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:09:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1392093084, now seen corresponding path program 137 times [2022-03-18 04:09:31,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:09:31,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1619877292] [2022-03-18 04:09:31,452 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:09:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1392093084, now seen corresponding path program 138 times [2022-03-18 04:09:31,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:09:31,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861615121] [2022-03-18 04:09:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:09:31,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:09:31,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:09:31,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441751347] [2022-03-18 04:09:31,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:09:31,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:09:31,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:09:31,463 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:09:31,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-18 04:09:31,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2022-03-18 04:09:31,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:09:31,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 1680 conjuncts, 143 conjunts are in the unsatisfiable core [2022-03-18 04:09:31,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:09:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 21394 backedges. 138 proven. 21252 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:09:34,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:09:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21394 backedges. 138 proven. 11868 refuted. 0 times theorem prover too weak. 9388 trivial. 0 not checked. [2022-03-18 04:09:36,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:09:36,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861615121] [2022-03-18 04:09:36,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:09:36,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441751347] [2022-03-18 04:09:36,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441751347] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:09:36,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:09:36,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 104 [2022-03-18 04:09:36,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:09:36,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1619877292] [2022-03-18 04:09:36,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1619877292] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:09:36,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:09:36,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-18 04:09:36,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166470361] [2022-03-18 04:09:36,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:09:36,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-18 04:09:36,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:09:36,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-18 04:09:36,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:09:36,613 INFO L87 Difference]: Start difference. First operand 641 states and 711 transitions. Second operand has 73 states, 73 states have (on average 6.780821917808219) internal successors, (495), 72 states have internal predecessors, (495), 72 states have call successors, (74), 72 states have call predecessors, (74), 70 states have return successors, (72), 70 states have call predecessors, (72), 71 states have call successors, (72) [2022-03-18 04:09:38,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:09:38,705 INFO L93 Difference]: Finished difference Result 655 states and 726 transitions. [2022-03-18 04:09:38,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-03-18 04:09:38,706 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 6.780821917808219) internal successors, (495), 72 states have internal predecessors, (495), 72 states have call successors, (74), 72 states have call predecessors, (74), 70 states have return successors, (72), 70 states have call predecessors, (72), 71 states have call successors, (72) Word has length 644 [2022-03-18 04:09:38,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:09:38,707 INFO L225 Difference]: With dead ends: 655 [2022-03-18 04:09:38,707 INFO L226 Difference]: Without dead ends: 650 [2022-03-18 04:09:38,709 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1356 GetRequests, 1184 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=12263, Invalid=17493, Unknown=0, NotChecked=0, Total=29756 [2022-03-18 04:09:38,709 INFO L912 BasicCegarLoop]: 95 mSDtfsCounter, 327 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:09:38,709 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 628 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:09:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-03-18 04:09:38,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2022-03-18 04:09:38,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 502 states have (on average 1.1414342629482073) internal successors, (573), 502 states have internal predecessors, (573), 75 states have call successors, (75), 74 states have call predecessors, (75), 72 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2022-03-18 04:09:38,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 721 transitions. [2022-03-18 04:09:38,744 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 721 transitions. Word has length 644 [2022-03-18 04:09:38,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:09:38,744 INFO L478 AbstractCegarLoop]: Abstraction has 650 states and 721 transitions. [2022-03-18 04:09:38,744 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 6.780821917808219) internal successors, (495), 72 states have internal predecessors, (495), 72 states have call successors, (74), 72 states have call predecessors, (74), 70 states have return successors, (72), 70 states have call predecessors, (72), 71 states have call successors, (72) [2022-03-18 04:09:38,745 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 721 transitions. [2022-03-18 04:09:38,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 654 [2022-03-18 04:09:38,748 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:09:38,748 INFO L500 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 70, 70, 70, 70, 70, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:09:38,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-18 04:09:38,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-03-18 04:09:38,948 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:09:38,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:09:38,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1298999126, now seen corresponding path program 139 times [2022-03-18 04:09:38,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:09:38,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2056193835] [2022-03-18 04:09:38,949 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:09:38,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1298999126, now seen corresponding path program 140 times [2022-03-18 04:09:38,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:09:38,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691433078] [2022-03-18 04:09:38,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:09:38,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:09:38,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:09:38,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694588707] [2022-03-18 04:09:38,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:09:38,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:09:38,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:09:38,960 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:09:38,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-18 04:09:39,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:09:39,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:09:39,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 1703 conjuncts, 145 conjunts are in the unsatisfiable core [2022-03-18 04:09:39,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:09:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 22019 backedges. 140 proven. 21875 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:09:41,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:09:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 22019 backedges. 140 proven. 12215 refuted. 0 times theorem prover too weak. 9664 trivial. 0 not checked. [2022-03-18 04:09:43,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:09:43,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691433078] [2022-03-18 04:09:43,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:09:43,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694588707] [2022-03-18 04:09:43,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694588707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:09:43,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:09:43,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 104 [2022-03-18 04:09:43,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:09:43,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2056193835] [2022-03-18 04:09:43,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2056193835] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:09:43,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:09:43,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-18 04:09:43,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760551355] [2022-03-18 04:09:43,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:09:43,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-18 04:09:43,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:09:43,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-18 04:09:43,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:09:43,837 INFO L87 Difference]: Start difference. First operand 650 states and 721 transitions. Second operand has 74 states, 74 states have (on average 6.783783783783784) internal successors, (502), 73 states have internal predecessors, (502), 73 states have call successors, (75), 73 states have call predecessors, (75), 71 states have return successors, (73), 71 states have call predecessors, (73), 72 states have call successors, (73) [2022-03-18 04:09:45,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:09:45,998 INFO L93 Difference]: Finished difference Result 664 states and 736 transitions. [2022-03-18 04:09:45,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-03-18 04:09:45,999 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 6.783783783783784) internal successors, (502), 73 states have internal predecessors, (502), 73 states have call successors, (75), 73 states have call predecessors, (75), 71 states have return successors, (73), 71 states have call predecessors, (73), 72 states have call successors, (73) Word has length 653 [2022-03-18 04:09:45,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:09:46,000 INFO L225 Difference]: With dead ends: 664 [2022-03-18 04:09:46,000 INFO L226 Difference]: Without dead ends: 659 [2022-03-18 04:09:46,001 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1375 GetRequests, 1202 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2613 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=12366, Invalid=17736, Unknown=0, NotChecked=0, Total=30102 [2022-03-18 04:09:46,002 INFO L912 BasicCegarLoop]: 96 mSDtfsCounter, 273 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:09:46,002 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 654 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:09:46,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-03-18 04:09:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 659. [2022-03-18 04:09:46,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 509 states have (on average 1.1414538310412574) internal successors, (581), 509 states have internal predecessors, (581), 76 states have call successors, (76), 75 states have call predecessors, (76), 73 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2022-03-18 04:09:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 731 transitions. [2022-03-18 04:09:46,036 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 731 transitions. Word has length 653 [2022-03-18 04:09:46,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:09:46,037 INFO L478 AbstractCegarLoop]: Abstraction has 659 states and 731 transitions. [2022-03-18 04:09:46,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 6.783783783783784) internal successors, (502), 73 states have internal predecessors, (502), 73 states have call successors, (75), 73 states have call predecessors, (75), 71 states have return successors, (73), 71 states have call predecessors, (73), 72 states have call successors, (73) [2022-03-18 04:09:46,037 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 731 transitions. [2022-03-18 04:09:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2022-03-18 04:09:46,041 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:09:46,041 INFO L500 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 71, 71, 71, 71, 71, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:09:46,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-18 04:09:46,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:09:46,263 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:09:46,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:09:46,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1356118236, now seen corresponding path program 141 times [2022-03-18 04:09:46,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:09:46,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1063645369] [2022-03-18 04:09:46,264 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:09:46,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1356118236, now seen corresponding path program 142 times [2022-03-18 04:09:46,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:09:46,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335120937] [2022-03-18 04:09:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:09:46,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:09:46,274 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:09:46,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237702808] [2022-03-18 04:09:46,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:09:46,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:09:46,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:09:46,275 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:09:46,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-18 04:09:46,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:09:46,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:09:46,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 1726 conjuncts, 147 conjunts are in the unsatisfiable core [2022-03-18 04:09:46,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:09:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 22653 backedges. 142 proven. 22507 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:09:48,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:09:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 22653 backedges. 142 proven. 12567 refuted. 0 times theorem prover too weak. 9944 trivial. 0 not checked. [2022-03-18 04:09:51,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:09:51,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335120937] [2022-03-18 04:09:51,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:09:51,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237702808] [2022-03-18 04:09:51,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237702808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:09:51,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:09:51,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 104 [2022-03-18 04:09:51,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:09:51,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1063645369] [2022-03-18 04:09:51,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1063645369] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:09:51,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:09:51,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-18 04:09:51,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774690048] [2022-03-18 04:09:51,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:09:51,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-18 04:09:51,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:09:51,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-18 04:09:51,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:09:51,203 INFO L87 Difference]: Start difference. First operand 659 states and 731 transitions. Second operand has 75 states, 75 states have (on average 6.786666666666667) internal successors, (509), 74 states have internal predecessors, (509), 74 states have call successors, (76), 74 states have call predecessors, (76), 72 states have return successors, (74), 72 states have call predecessors, (74), 73 states have call successors, (74) [2022-03-18 04:09:53,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:09:53,463 INFO L93 Difference]: Finished difference Result 673 states and 746 transitions. [2022-03-18 04:09:53,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-03-18 04:09:53,463 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 6.786666666666667) internal successors, (509), 74 states have internal predecessors, (509), 74 states have call successors, (76), 74 states have call predecessors, (76), 72 states have return successors, (74), 72 states have call predecessors, (74), 73 states have call successors, (74) Word has length 662 [2022-03-18 04:09:53,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:09:53,465 INFO L225 Difference]: With dead ends: 673 [2022-03-18 04:09:53,465 INFO L226 Difference]: Without dead ends: 668 [2022-03-18 04:09:53,467 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1394 GetRequests, 1220 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2683 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12469, Invalid=17981, Unknown=0, NotChecked=0, Total=30450 [2022-03-18 04:09:53,467 INFO L912 BasicCegarLoop]: 97 mSDtfsCounter, 251 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 04:09:53,467 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 662 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 04:09:53,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-03-18 04:09:53,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 668. [2022-03-18 04:09:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 516 states have (on average 1.1414728682170543) internal successors, (589), 516 states have internal predecessors, (589), 77 states have call successors, (77), 76 states have call predecessors, (77), 74 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2022-03-18 04:09:53,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 741 transitions. [2022-03-18 04:09:53,519 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 741 transitions. Word has length 662 [2022-03-18 04:09:53,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:09:53,519 INFO L478 AbstractCegarLoop]: Abstraction has 668 states and 741 transitions. [2022-03-18 04:09:53,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 6.786666666666667) internal successors, (509), 74 states have internal predecessors, (509), 74 states have call successors, (76), 74 states have call predecessors, (76), 72 states have return successors, (74), 72 states have call predecessors, (74), 73 states have call successors, (74) [2022-03-18 04:09:53,519 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 741 transitions. [2022-03-18 04:09:53,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2022-03-18 04:09:53,522 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:09:53,523 INFO L500 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 72, 72, 72, 72, 72, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:09:53,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-18 04:09:53,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:09:53,723 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:09:53,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:09:53,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1462665706, now seen corresponding path program 143 times [2022-03-18 04:09:53,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:09:53,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [508425345] [2022-03-18 04:09:53,724 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:09:53,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1462665706, now seen corresponding path program 144 times [2022-03-18 04:09:53,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:09:53,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979196728] [2022-03-18 04:09:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:09:53,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:09:53,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:09:53,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411252887] [2022-03-18 04:09:53,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:09:53,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:09:53,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:09:53,735 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:09:53,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-18 04:09:54,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2022-03-18 04:09:54,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:09:54,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 1749 conjuncts, 149 conjunts are in the unsatisfiable core [2022-03-18 04:09:54,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:09:56,683 INFO L134 CoverageAnalysis]: Checked inductivity of 23296 backedges. 144 proven. 23148 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:09:56,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:09:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 23296 backedges. 144 proven. 12924 refuted. 0 times theorem prover too weak. 10228 trivial. 0 not checked. [2022-03-18 04:09:58,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:09:58,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979196728] [2022-03-18 04:09:58,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:09:58,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411252887] [2022-03-18 04:09:58,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411252887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:09:58,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:09:58,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 104 [2022-03-18 04:09:58,951 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:09:58,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [508425345] [2022-03-18 04:09:58,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [508425345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:09:58,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:09:58,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-18 04:09:58,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991150445] [2022-03-18 04:09:58,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:09:58,952 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-18 04:09:58,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:09:58,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-18 04:09:58,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:09:58,953 INFO L87 Difference]: Start difference. First operand 668 states and 741 transitions. Second operand has 76 states, 76 states have (on average 6.7894736842105265) internal successors, (516), 75 states have internal predecessors, (516), 75 states have call successors, (77), 75 states have call predecessors, (77), 73 states have return successors, (75), 73 states have call predecessors, (75), 74 states have call successors, (75) [2022-03-18 04:10:01,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:10:01,232 INFO L93 Difference]: Finished difference Result 682 states and 756 transitions. [2022-03-18 04:10:01,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-03-18 04:10:01,233 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 6.7894736842105265) internal successors, (516), 75 states have internal predecessors, (516), 75 states have call successors, (77), 75 states have call predecessors, (77), 73 states have return successors, (75), 73 states have call predecessors, (75), 74 states have call successors, (75) Word has length 671 [2022-03-18 04:10:01,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:10:01,235 INFO L225 Difference]: With dead ends: 682 [2022-03-18 04:10:01,235 INFO L226 Difference]: Without dead ends: 677 [2022-03-18 04:10:01,236 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1413 GetRequests, 1238 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2754 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12572, Invalid=18228, Unknown=0, NotChecked=0, Total=30800 [2022-03-18 04:10:01,237 INFO L912 BasicCegarLoop]: 98 mSDtfsCounter, 312 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:10:01,237 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 670 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:10:01,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-03-18 04:10:01,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 677. [2022-03-18 04:10:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 523 states have (on average 1.1414913957934991) internal successors, (597), 523 states have internal predecessors, (597), 78 states have call successors, (78), 77 states have call predecessors, (78), 75 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-03-18 04:10:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 751 transitions. [2022-03-18 04:10:01,273 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 751 transitions. Word has length 671 [2022-03-18 04:10:01,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:10:01,273 INFO L478 AbstractCegarLoop]: Abstraction has 677 states and 751 transitions. [2022-03-18 04:10:01,273 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 6.7894736842105265) internal successors, (516), 75 states have internal predecessors, (516), 75 states have call successors, (77), 75 states have call predecessors, (77), 73 states have return successors, (75), 73 states have call predecessors, (75), 74 states have call successors, (75) [2022-03-18 04:10:01,274 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 751 transitions. [2022-03-18 04:10:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2022-03-18 04:10:01,286 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:10:01,287 INFO L500 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 73, 73, 73, 73, 73, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:10:01,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-18 04:10:01,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-18 04:10:01,487 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:10:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:10:01,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1761999388, now seen corresponding path program 145 times [2022-03-18 04:10:01,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:10:01,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1485970712] [2022-03-18 04:10:01,488 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:10:01,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1761999388, now seen corresponding path program 146 times [2022-03-18 04:10:01,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:10:01,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887698805] [2022-03-18 04:10:01,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:10:01,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:10:01,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:10:01,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882397717] [2022-03-18 04:10:01,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:10:01,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:10:01,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:10:01,499 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:10:01,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-18 04:10:01,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:10:01,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:10:01,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 151 conjunts are in the unsatisfiable core [2022-03-18 04:10:01,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:10:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 23948 backedges. 146 proven. 23798 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:10:04,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:10:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 23948 backedges. 146 proven. 13286 refuted. 0 times theorem prover too weak. 10516 trivial. 0 not checked. [2022-03-18 04:10:06,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:10:06,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887698805] [2022-03-18 04:10:06,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:10:06,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882397717] [2022-03-18 04:10:06,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882397717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:10:06,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:10:06,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 104 [2022-03-18 04:10:06,423 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:10:06,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1485970712] [2022-03-18 04:10:06,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1485970712] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:10:06,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:10:06,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-18 04:10:06,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257217984] [2022-03-18 04:10:06,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:10:06,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-18 04:10:06,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:10:06,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-18 04:10:06,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:10:06,425 INFO L87 Difference]: Start difference. First operand 677 states and 751 transitions. Second operand has 77 states, 77 states have (on average 6.792207792207792) internal successors, (523), 76 states have internal predecessors, (523), 76 states have call successors, (78), 76 states have call predecessors, (78), 74 states have return successors, (76), 74 states have call predecessors, (76), 75 states have call successors, (76) [2022-03-18 04:10:08,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:10:08,733 INFO L93 Difference]: Finished difference Result 691 states and 766 transitions. [2022-03-18 04:10:08,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-03-18 04:10:08,734 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 6.792207792207792) internal successors, (523), 76 states have internal predecessors, (523), 76 states have call successors, (78), 76 states have call predecessors, (78), 74 states have return successors, (76), 74 states have call predecessors, (76), 75 states have call successors, (76) Word has length 680 [2022-03-18 04:10:08,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:10:08,736 INFO L225 Difference]: With dead ends: 691 [2022-03-18 04:10:08,736 INFO L226 Difference]: Without dead ends: 686 [2022-03-18 04:10:08,737 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1432 GetRequests, 1256 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2826 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=12675, Invalid=18477, Unknown=0, NotChecked=0, Total=31152 [2022-03-18 04:10:08,737 INFO L912 BasicCegarLoop]: 99 mSDtfsCounter, 344 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:10:08,738 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 666 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:10:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-03-18 04:10:08,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 686. [2022-03-18 04:10:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 530 states have (on average 1.1415094339622642) internal successors, (605), 530 states have internal predecessors, (605), 79 states have call successors, (79), 78 states have call predecessors, (79), 76 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-18 04:10:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 761 transitions. [2022-03-18 04:10:08,777 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 761 transitions. Word has length 680 [2022-03-18 04:10:08,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:10:08,778 INFO L478 AbstractCegarLoop]: Abstraction has 686 states and 761 transitions. [2022-03-18 04:10:08,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 6.792207792207792) internal successors, (523), 76 states have internal predecessors, (523), 76 states have call successors, (78), 76 states have call predecessors, (78), 74 states have return successors, (76), 74 states have call predecessors, (76), 75 states have call successors, (76) [2022-03-18 04:10:08,778 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 761 transitions. [2022-03-18 04:10:08,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2022-03-18 04:10:08,781 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:10:08,782 INFO L500 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 74, 74, 74, 74, 74, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:10:08,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-18 04:10:08,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-18 04:10:08,983 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:10:08,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:10:08,983 INFO L85 PathProgramCache]: Analyzing trace with hash -271211306, now seen corresponding path program 147 times [2022-03-18 04:10:08,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:10:08,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [391018113] [2022-03-18 04:10:08,984 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:10:08,984 INFO L85 PathProgramCache]: Analyzing trace with hash -271211306, now seen corresponding path program 148 times [2022-03-18 04:10:08,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:10:08,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040953143] [2022-03-18 04:10:08,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:10:08,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:10:08,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:10:08,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426179680] [2022-03-18 04:10:08,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:10:08,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:10:08,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:10:08,995 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:10:08,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-18 04:10:09,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:10:09,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:10:09,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 1795 conjuncts, 153 conjunts are in the unsatisfiable core [2022-03-18 04:10:09,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:10:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 24609 backedges. 148 proven. 24457 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:10:11,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:10:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 24609 backedges. 148 proven. 13653 refuted. 0 times theorem prover too weak. 10808 trivial. 0 not checked. [2022-03-18 04:10:13,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:10:13,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040953143] [2022-03-18 04:10:13,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:10:13,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426179680] [2022-03-18 04:10:13,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426179680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:10:13,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:10:13,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 104 [2022-03-18 04:10:13,990 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:10:13,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [391018113] [2022-03-18 04:10:13,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [391018113] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:10:13,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:10:13,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-18 04:10:13,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283467057] [2022-03-18 04:10:13,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:10:13,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-18 04:10:13,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:10:13,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-18 04:10:13,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:10:13,992 INFO L87 Difference]: Start difference. First operand 686 states and 761 transitions. Second operand has 78 states, 78 states have (on average 6.794871794871795) internal successors, (530), 77 states have internal predecessors, (530), 77 states have call successors, (79), 77 states have call predecessors, (79), 75 states have return successors, (77), 75 states have call predecessors, (77), 76 states have call successors, (77) [2022-03-18 04:10:16,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:10:16,386 INFO L93 Difference]: Finished difference Result 700 states and 776 transitions. [2022-03-18 04:10:16,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-03-18 04:10:16,386 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 6.794871794871795) internal successors, (530), 77 states have internal predecessors, (530), 77 states have call successors, (79), 77 states have call predecessors, (79), 75 states have return successors, (77), 75 states have call predecessors, (77), 76 states have call successors, (77) Word has length 689 [2022-03-18 04:10:16,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:10:16,388 INFO L225 Difference]: With dead ends: 700 [2022-03-18 04:10:16,388 INFO L226 Difference]: Without dead ends: 695 [2022-03-18 04:10:16,389 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1451 GetRequests, 1274 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2899 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12778, Invalid=18728, Unknown=0, NotChecked=0, Total=31506 [2022-03-18 04:10:16,390 INFO L912 BasicCegarLoop]: 100 mSDtfsCounter, 288 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:10:16,390 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 674 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:10:16,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-03-18 04:10:16,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 695. [2022-03-18 04:10:16,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 537 states have (on average 1.1415270018621975) internal successors, (613), 537 states have internal predecessors, (613), 80 states have call successors, (80), 79 states have call predecessors, (80), 77 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-03-18 04:10:16,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 771 transitions. [2022-03-18 04:10:16,443 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 771 transitions. Word has length 689 [2022-03-18 04:10:16,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:10:16,444 INFO L478 AbstractCegarLoop]: Abstraction has 695 states and 771 transitions. [2022-03-18 04:10:16,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 6.794871794871795) internal successors, (530), 77 states have internal predecessors, (530), 77 states have call successors, (79), 77 states have call predecessors, (79), 75 states have return successors, (77), 75 states have call predecessors, (77), 76 states have call successors, (77) [2022-03-18 04:10:16,444 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 771 transitions. [2022-03-18 04:10:16,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2022-03-18 04:10:16,449 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:10:16,449 INFO L500 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 75, 75, 75, 75, 75, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:10:16,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-18 04:10:16,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:10:16,663 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:10:16,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:10:16,664 INFO L85 PathProgramCache]: Analyzing trace with hash -463377572, now seen corresponding path program 149 times [2022-03-18 04:10:16,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:10:16,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [938683653] [2022-03-18 04:10:16,664 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:10:16,664 INFO L85 PathProgramCache]: Analyzing trace with hash -463377572, now seen corresponding path program 150 times [2022-03-18 04:10:16,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:10:16,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623678706] [2022-03-18 04:10:16,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:10:16,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:10:16,676 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:10:16,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755266265] [2022-03-18 04:10:16,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:10:16,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:10:16,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:10:16,677 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:10:16,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-18 04:10:17,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2022-03-18 04:10:17,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:10:17,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 1818 conjuncts, 155 conjunts are in the unsatisfiable core [2022-03-18 04:10:17,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:10:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25279 backedges. 150 proven. 25125 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:10:19,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:10:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25279 backedges. 150 proven. 14025 refuted. 0 times theorem prover too weak. 11104 trivial. 0 not checked. [2022-03-18 04:10:22,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:10:22,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623678706] [2022-03-18 04:10:22,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:10:22,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755266265] [2022-03-18 04:10:22,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755266265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:10:22,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:10:22,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 104 [2022-03-18 04:10:22,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:10:22,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [938683653] [2022-03-18 04:10:22,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [938683653] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:10:22,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:10:22,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-18 04:10:22,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023400118] [2022-03-18 04:10:22,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:10:22,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-18 04:10:22,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:10:22,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-18 04:10:22,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:10:22,081 INFO L87 Difference]: Start difference. First operand 695 states and 771 transitions. Second operand has 79 states, 79 states have (on average 6.7974683544303796) internal successors, (537), 78 states have internal predecessors, (537), 78 states have call successors, (80), 78 states have call predecessors, (80), 76 states have return successors, (78), 76 states have call predecessors, (78), 77 states have call successors, (78) [2022-03-18 04:10:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:10:24,506 INFO L93 Difference]: Finished difference Result 709 states and 786 transitions. [2022-03-18 04:10:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-03-18 04:10:24,506 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 6.7974683544303796) internal successors, (537), 78 states have internal predecessors, (537), 78 states have call successors, (80), 78 states have call predecessors, (80), 76 states have return successors, (78), 76 states have call predecessors, (78), 77 states have call successors, (78) Word has length 698 [2022-03-18 04:10:24,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:10:24,509 INFO L225 Difference]: With dead ends: 709 [2022-03-18 04:10:24,509 INFO L226 Difference]: Without dead ends: 704 [2022-03-18 04:10:24,510 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1470 GetRequests, 1292 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12881, Invalid=18981, Unknown=0, NotChecked=0, Total=31862 [2022-03-18 04:10:24,510 INFO L912 BasicCegarLoop]: 101 mSDtfsCounter, 293 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:10:24,510 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 676 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:10:24,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-03-18 04:10:24,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 704. [2022-03-18 04:10:24,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 544 states have (on average 1.1415441176470589) internal successors, (621), 544 states have internal predecessors, (621), 81 states have call successors, (81), 80 states have call predecessors, (81), 78 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-18 04:10:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 781 transitions. [2022-03-18 04:10:24,565 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 781 transitions. Word has length 698 [2022-03-18 04:10:24,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:10:24,566 INFO L478 AbstractCegarLoop]: Abstraction has 704 states and 781 transitions. [2022-03-18 04:10:24,566 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 6.7974683544303796) internal successors, (537), 78 states have internal predecessors, (537), 78 states have call successors, (80), 78 states have call predecessors, (80), 76 states have return successors, (78), 76 states have call predecessors, (78), 77 states have call successors, (78) [2022-03-18 04:10:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 781 transitions. [2022-03-18 04:10:24,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2022-03-18 04:10:24,571 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:10:24,571 INFO L500 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 76, 76, 76, 76, 76, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:10:24,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-18 04:10:24,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:10:24,780 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:10:24,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:10:24,780 INFO L85 PathProgramCache]: Analyzing trace with hash -2010801258, now seen corresponding path program 151 times [2022-03-18 04:10:24,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:10:24,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1769686823] [2022-03-18 04:10:24,781 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:10:24,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2010801258, now seen corresponding path program 152 times [2022-03-18 04:10:24,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:10:24,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308262598] [2022-03-18 04:10:24,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:10:24,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:10:24,790 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:10:24,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417677275] [2022-03-18 04:10:24,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:10:24,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:10:24,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:10:24,792 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:10:24,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-18 04:10:24,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:10:24,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:10:25,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 157 conjunts are in the unsatisfiable core [2022-03-18 04:10:25,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:10:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 25958 backedges. 152 proven. 25802 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:10:27,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:10:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25958 backedges. 152 proven. 14402 refuted. 0 times theorem prover too weak. 11404 trivial. 0 not checked. [2022-03-18 04:10:29,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:10:29,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308262598] [2022-03-18 04:10:29,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:10:29,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417677275] [2022-03-18 04:10:29,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417677275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:10:29,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:10:29,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 104 [2022-03-18 04:10:29,810 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:10:29,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1769686823] [2022-03-18 04:10:29,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1769686823] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:10:29,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:10:29,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-18 04:10:29,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561199430] [2022-03-18 04:10:29,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:10:29,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-18 04:10:29,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:10:29,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-18 04:10:29,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:10:29,812 INFO L87 Difference]: Start difference. First operand 704 states and 781 transitions. Second operand has 80 states, 80 states have (on average 6.8) internal successors, (544), 79 states have internal predecessors, (544), 79 states have call successors, (81), 79 states have call predecessors, (81), 77 states have return successors, (79), 77 states have call predecessors, (79), 78 states have call successors, (79) [2022-03-18 04:10:32,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:10:32,343 INFO L93 Difference]: Finished difference Result 718 states and 796 transitions. [2022-03-18 04:10:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-03-18 04:10:32,343 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 6.8) internal successors, (544), 79 states have internal predecessors, (544), 79 states have call successors, (81), 79 states have call predecessors, (81), 77 states have return successors, (79), 77 states have call predecessors, (79), 78 states have call successors, (79) Word has length 707 [2022-03-18 04:10:32,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:10:32,346 INFO L225 Difference]: With dead ends: 718 [2022-03-18 04:10:32,346 INFO L226 Difference]: Without dead ends: 713 [2022-03-18 04:10:32,348 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1489 GetRequests, 1310 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3048 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12984, Invalid=19236, Unknown=0, NotChecked=0, Total=32220 [2022-03-18 04:10:32,348 INFO L912 BasicCegarLoop]: 102 mSDtfsCounter, 260 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 04:10:32,348 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 708 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 04:10:32,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-03-18 04:10:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2022-03-18 04:10:32,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 551 states have (on average 1.1415607985480944) internal successors, (629), 551 states have internal predecessors, (629), 82 states have call successors, (82), 81 states have call predecessors, (82), 79 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2022-03-18 04:10:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 791 transitions. [2022-03-18 04:10:32,387 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 791 transitions. Word has length 707 [2022-03-18 04:10:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:10:32,388 INFO L478 AbstractCegarLoop]: Abstraction has 713 states and 791 transitions. [2022-03-18 04:10:32,388 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 6.8) internal successors, (544), 79 states have internal predecessors, (544), 79 states have call successors, (81), 79 states have call predecessors, (81), 77 states have return successors, (79), 77 states have call predecessors, (79), 78 states have call successors, (79) [2022-03-18 04:10:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 791 transitions. [2022-03-18 04:10:32,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2022-03-18 04:10:32,392 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:10:32,392 INFO L500 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 77, 77, 77, 77, 77, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:10:32,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-18 04:10:32,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-18 04:10:32,592 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:10:32,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:10:32,593 INFO L85 PathProgramCache]: Analyzing trace with hash -21295972, now seen corresponding path program 153 times [2022-03-18 04:10:32,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:10:32,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [677172976] [2022-03-18 04:10:32,593 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:10:32,593 INFO L85 PathProgramCache]: Analyzing trace with hash -21295972, now seen corresponding path program 154 times [2022-03-18 04:10:32,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:10:32,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854180728] [2022-03-18 04:10:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:10:32,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:10:32,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:10:32,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157546061] [2022-03-18 04:10:32,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:10:32,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:10:32,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:10:32,612 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:10:32,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-18 04:10:32,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:10:32,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:10:32,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1864 conjuncts, 159 conjunts are in the unsatisfiable core [2022-03-18 04:10:32,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:10:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 26646 backedges. 154 proven. 26488 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:10:35,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:10:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 26646 backedges. 154 proven. 14784 refuted. 0 times theorem prover too weak. 11708 trivial. 0 not checked. [2022-03-18 04:10:37,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:10:37,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854180728] [2022-03-18 04:10:37,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:10:37,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157546061] [2022-03-18 04:10:37,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157546061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:10:37,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:10:37,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 104 [2022-03-18 04:10:37,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:10:37,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [677172976] [2022-03-18 04:10:37,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [677172976] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:10:37,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:10:37,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-18 04:10:37,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996608643] [2022-03-18 04:10:37,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:10:37,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-18 04:10:37,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:10:37,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-18 04:10:37,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:10:37,690 INFO L87 Difference]: Start difference. First operand 713 states and 791 transitions. Second operand has 81 states, 81 states have (on average 6.802469135802469) internal successors, (551), 80 states have internal predecessors, (551), 80 states have call successors, (82), 80 states have call predecessors, (82), 78 states have return successors, (80), 78 states have call predecessors, (80), 79 states have call successors, (80) [2022-03-18 04:10:40,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:10:40,239 INFO L93 Difference]: Finished difference Result 727 states and 806 transitions. [2022-03-18 04:10:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-03-18 04:10:40,239 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 6.802469135802469) internal successors, (551), 80 states have internal predecessors, (551), 80 states have call successors, (82), 80 states have call predecessors, (82), 78 states have return successors, (80), 78 states have call predecessors, (80), 79 states have call successors, (80) Word has length 716 [2022-03-18 04:10:40,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:10:40,242 INFO L225 Difference]: With dead ends: 727 [2022-03-18 04:10:40,242 INFO L226 Difference]: Without dead ends: 722 [2022-03-18 04:10:40,244 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1508 GetRequests, 1328 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3124 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=13087, Invalid=19493, Unknown=0, NotChecked=0, Total=32580 [2022-03-18 04:10:40,244 INFO L912 BasicCegarLoop]: 103 mSDtfsCounter, 352 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:10:40,244 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 698 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:10:40,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-03-18 04:10:40,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 722. [2022-03-18 04:10:40,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 558 states have (on average 1.1415770609318996) internal successors, (637), 558 states have internal predecessors, (637), 83 states have call successors, (83), 82 states have call predecessors, (83), 80 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2022-03-18 04:10:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 801 transitions. [2022-03-18 04:10:40,316 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 801 transitions. Word has length 716 [2022-03-18 04:10:40,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:10:40,317 INFO L478 AbstractCegarLoop]: Abstraction has 722 states and 801 transitions. [2022-03-18 04:10:40,317 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 6.802469135802469) internal successors, (551), 80 states have internal predecessors, (551), 80 states have call successors, (82), 80 states have call predecessors, (82), 78 states have return successors, (80), 78 states have call predecessors, (80), 79 states have call successors, (80) [2022-03-18 04:10:40,317 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 801 transitions. [2022-03-18 04:10:40,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2022-03-18 04:10:40,321 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:10:40,321 INFO L500 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 78, 78, 78, 78, 78, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:10:40,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-18 04:10:40,521 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:10:40,521 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:10:40,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:10:40,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1148019286, now seen corresponding path program 155 times [2022-03-18 04:10:40,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:10:40,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [797858983] [2022-03-18 04:10:40,522 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:10:40,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1148019286, now seen corresponding path program 156 times [2022-03-18 04:10:40,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:10:40,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008835993] [2022-03-18 04:10:40,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:10:40,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:10:40,533 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:10:40,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978639803] [2022-03-18 04:10:40,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:10:40,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:10:40,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:10:40,534 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:10:40,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-18 04:10:41,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2022-03-18 04:10:41,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:10:41,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 161 conjunts are in the unsatisfiable core [2022-03-18 04:10:41,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:10:43,867 INFO L134 CoverageAnalysis]: Checked inductivity of 27343 backedges. 156 proven. 27183 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:10:43,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:10:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 27343 backedges. 156 proven. 15171 refuted. 0 times theorem prover too weak. 12016 trivial. 0 not checked. [2022-03-18 04:10:45,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:10:45,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008835993] [2022-03-18 04:10:45,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:10:45,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978639803] [2022-03-18 04:10:45,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978639803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:10:45,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:10:45,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 104 [2022-03-18 04:10:45,950 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:10:45,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [797858983] [2022-03-18 04:10:45,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [797858983] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:10:45,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:10:45,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-18 04:10:45,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136238869] [2022-03-18 04:10:45,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:10:45,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-18 04:10:45,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:10:45,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-18 04:10:45,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:10:45,952 INFO L87 Difference]: Start difference. First operand 722 states and 801 transitions. Second operand has 82 states, 82 states have (on average 6.804878048780488) internal successors, (558), 81 states have internal predecessors, (558), 81 states have call successors, (83), 81 states have call predecessors, (83), 79 states have return successors, (81), 79 states have call predecessors, (81), 80 states have call successors, (81) [2022-03-18 04:10:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:10:48,552 INFO L93 Difference]: Finished difference Result 736 states and 816 transitions. [2022-03-18 04:10:48,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-03-18 04:10:48,552 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 6.804878048780488) internal successors, (558), 81 states have internal predecessors, (558), 81 states have call successors, (83), 81 states have call predecessors, (83), 79 states have return successors, (81), 79 states have call predecessors, (81), 80 states have call successors, (81) Word has length 725 [2022-03-18 04:10:48,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:10:48,554 INFO L225 Difference]: With dead ends: 736 [2022-03-18 04:10:48,555 INFO L226 Difference]: Without dead ends: 731 [2022-03-18 04:10:48,556 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1527 GetRequests, 1346 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3201 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=13190, Invalid=19752, Unknown=0, NotChecked=0, Total=32942 [2022-03-18 04:10:48,556 INFO L912 BasicCegarLoop]: 104 mSDtfsCounter, 325 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:10:48,557 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 712 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:10:48,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-18 04:10:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 731. [2022-03-18 04:10:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 565 states have (on average 1.1415929203539823) internal successors, (645), 565 states have internal predecessors, (645), 84 states have call successors, (84), 83 states have call predecessors, (84), 81 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-18 04:10:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 811 transitions. [2022-03-18 04:10:48,597 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 811 transitions. Word has length 725 [2022-03-18 04:10:48,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:10:48,597 INFO L478 AbstractCegarLoop]: Abstraction has 731 states and 811 transitions. [2022-03-18 04:10:48,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 6.804878048780488) internal successors, (558), 81 states have internal predecessors, (558), 81 states have call successors, (83), 81 states have call predecessors, (83), 79 states have return successors, (81), 79 states have call predecessors, (81), 80 states have call successors, (81) [2022-03-18 04:10:48,597 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 811 transitions. [2022-03-18 04:10:48,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 735 [2022-03-18 04:10:48,602 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:10:48,602 INFO L500 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 79, 79, 79, 79, 79, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:10:48,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-18 04:10:48,805 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:10:48,805 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:10:48,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:10:48,806 INFO L85 PathProgramCache]: Analyzing trace with hash 652664284, now seen corresponding path program 157 times [2022-03-18 04:10:48,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:10:48,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [122881838] [2022-03-18 04:10:48,806 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:10:48,806 INFO L85 PathProgramCache]: Analyzing trace with hash 652664284, now seen corresponding path program 158 times [2022-03-18 04:10:48,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:10:48,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354872731] [2022-03-18 04:10:48,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:10:48,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:10:48,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:10:48,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385282082] [2022-03-18 04:10:48,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:10:48,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:10:48,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:10:48,818 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:10:48,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-18 04:10:49,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:10:49,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:10:49,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 1910 conjuncts, 163 conjunts are in the unsatisfiable core [2022-03-18 04:10:49,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:10:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 28049 backedges. 158 proven. 27887 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:10:51,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:10:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 28049 backedges. 158 proven. 15563 refuted. 0 times theorem prover too weak. 12328 trivial. 0 not checked. [2022-03-18 04:10:53,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:10:53,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354872731] [2022-03-18 04:10:53,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:10:53,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385282082] [2022-03-18 04:10:53,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385282082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:10:53,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:10:53,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 104 [2022-03-18 04:10:53,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:10:53,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [122881838] [2022-03-18 04:10:53,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [122881838] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:10:53,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:10:53,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-18 04:10:53,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000769611] [2022-03-18 04:10:53,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:10:53,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-18 04:10:53,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:10:53,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-18 04:10:53,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:10:53,917 INFO L87 Difference]: Start difference. First operand 731 states and 811 transitions. Second operand has 83 states, 83 states have (on average 6.807228915662651) internal successors, (565), 82 states have internal predecessors, (565), 82 states have call successors, (84), 82 states have call predecessors, (84), 80 states have return successors, (82), 80 states have call predecessors, (82), 81 states have call successors, (82) [2022-03-18 04:10:56,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:10:56,613 INFO L93 Difference]: Finished difference Result 745 states and 826 transitions. [2022-03-18 04:10:56,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-03-18 04:10:56,613 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 6.807228915662651) internal successors, (565), 82 states have internal predecessors, (565), 82 states have call successors, (84), 82 states have call predecessors, (84), 80 states have return successors, (82), 80 states have call predecessors, (82), 81 states have call successors, (82) Word has length 734 [2022-03-18 04:10:56,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:10:56,615 INFO L225 Difference]: With dead ends: 745 [2022-03-18 04:10:56,615 INFO L226 Difference]: Without dead ends: 740 [2022-03-18 04:10:56,617 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1546 GetRequests, 1364 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3279 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=13293, Invalid=20013, Unknown=0, NotChecked=0, Total=33306 [2022-03-18 04:10:56,617 INFO L912 BasicCegarLoop]: 105 mSDtfsCounter, 362 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 04:10:56,617 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 726 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 04:10:56,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-03-18 04:10:56,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 740. [2022-03-18 04:10:56,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 572 states have (on average 1.1416083916083917) internal successors, (653), 572 states have internal predecessors, (653), 85 states have call successors, (85), 84 states have call predecessors, (85), 82 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-18 04:10:56,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 821 transitions. [2022-03-18 04:10:56,690 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 821 transitions. Word has length 734 [2022-03-18 04:10:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:10:56,691 INFO L478 AbstractCegarLoop]: Abstraction has 740 states and 821 transitions. [2022-03-18 04:10:56,691 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 6.807228915662651) internal successors, (565), 82 states have internal predecessors, (565), 82 states have call successors, (84), 82 states have call predecessors, (84), 80 states have return successors, (82), 80 states have call predecessors, (82), 81 states have call successors, (82) [2022-03-18 04:10:56,691 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 821 transitions. [2022-03-18 04:10:56,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 744 [2022-03-18 04:10:56,696 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:10:56,696 INFO L500 BasicCegarLoop]: trace histogram [81, 81, 80, 80, 80, 80, 80, 80, 80, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:10:56,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-18 04:10:56,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-03-18 04:10:56,919 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:10:56,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:10:56,920 INFO L85 PathProgramCache]: Analyzing trace with hash 609810710, now seen corresponding path program 159 times [2022-03-18 04:10:56,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:10:56,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [476322307] [2022-03-18 04:10:56,920 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:10:56,920 INFO L85 PathProgramCache]: Analyzing trace with hash 609810710, now seen corresponding path program 160 times [2022-03-18 04:10:56,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:10:56,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124606774] [2022-03-18 04:10:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:10:56,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:10:56,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:10:56,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928469747] [2022-03-18 04:10:56,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:10:56,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:10:56,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:10:56,933 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:10:56,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-18 04:10:57,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:10:57,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:10:57,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 1933 conjuncts, 165 conjunts are in the unsatisfiable core [2022-03-18 04:10:57,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:11:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 28764 backedges. 160 proven. 28600 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:11:00,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:11:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 28764 backedges. 160 proven. 15960 refuted. 0 times theorem prover too weak. 12644 trivial. 0 not checked. [2022-03-18 04:11:02,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:11:02,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124606774] [2022-03-18 04:11:02,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:11:02,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928469747] [2022-03-18 04:11:02,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928469747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:11:02,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:11:02,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 104 [2022-03-18 04:11:02,240 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:11:02,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [476322307] [2022-03-18 04:11:02,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [476322307] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:11:02,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:11:02,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-18 04:11:02,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579433051] [2022-03-18 04:11:02,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:11:02,241 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-18 04:11:02,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:11:02,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-18 04:11:02,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:11:02,242 INFO L87 Difference]: Start difference. First operand 740 states and 821 transitions. Second operand has 84 states, 84 states have (on average 6.809523809523809) internal successors, (572), 83 states have internal predecessors, (572), 83 states have call successors, (85), 83 states have call predecessors, (85), 81 states have return successors, (83), 81 states have call predecessors, (83), 82 states have call successors, (83) [2022-03-18 04:11:04,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:11:04,979 INFO L93 Difference]: Finished difference Result 754 states and 836 transitions. [2022-03-18 04:11:04,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-03-18 04:11:04,980 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 6.809523809523809) internal successors, (572), 83 states have internal predecessors, (572), 83 states have call successors, (85), 83 states have call predecessors, (85), 81 states have return successors, (83), 81 states have call predecessors, (83), 82 states have call successors, (83) Word has length 743 [2022-03-18 04:11:04,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:11:04,982 INFO L225 Difference]: With dead ends: 754 [2022-03-18 04:11:04,982 INFO L226 Difference]: Without dead ends: 749 [2022-03-18 04:11:04,983 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1565 GetRequests, 1382 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3358 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13396, Invalid=20276, Unknown=0, NotChecked=0, Total=33672 [2022-03-18 04:11:04,983 INFO L912 BasicCegarLoop]: 106 mSDtfsCounter, 359 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 04:11:04,984 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 710 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 04:11:04,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-03-18 04:11:05,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-03-18 04:11:05,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 579 states have (on average 1.1416234887737478) internal successors, (661), 579 states have internal predecessors, (661), 86 states have call successors, (86), 85 states have call predecessors, (86), 83 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2022-03-18 04:11:05,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 831 transitions. [2022-03-18 04:11:05,021 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 831 transitions. Word has length 743 [2022-03-18 04:11:05,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:11:05,021 INFO L478 AbstractCegarLoop]: Abstraction has 749 states and 831 transitions. [2022-03-18 04:11:05,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 6.809523809523809) internal successors, (572), 83 states have internal predecessors, (572), 83 states have call successors, (85), 83 states have call predecessors, (85), 81 states have return successors, (83), 81 states have call predecessors, (83), 82 states have call successors, (83) [2022-03-18 04:11:05,022 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 831 transitions. [2022-03-18 04:11:05,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2022-03-18 04:11:05,026 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:11:05,026 INFO L500 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 81, 81, 81, 81, 81, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:11:05,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-18 04:11:05,226 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:11:05,226 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:11:05,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:11:05,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1052303132, now seen corresponding path program 161 times [2022-03-18 04:11:05,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:11:05,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [559744587] [2022-03-18 04:11:05,228 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:11:05,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1052303132, now seen corresponding path program 162 times [2022-03-18 04:11:05,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:11:05,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566017147] [2022-03-18 04:11:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:11:05,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:11:05,239 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:11:05,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848315654] [2022-03-18 04:11:05,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:11:05,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:11:05,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:11:05,240 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:11:05,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-18 04:11:05,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2022-03-18 04:11:05,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:11:05,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 167 conjunts are in the unsatisfiable core [2022-03-18 04:11:05,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:11:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 29488 backedges. 162 proven. 29322 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:11:08,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:11:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 29488 backedges. 162 proven. 16362 refuted. 0 times theorem prover too weak. 12964 trivial. 0 not checked. [2022-03-18 04:11:10,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:11:10,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566017147] [2022-03-18 04:11:10,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:11:10,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848315654] [2022-03-18 04:11:10,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848315654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:11:10,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:11:10,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 104 [2022-03-18 04:11:10,918 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:11:10,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [559744587] [2022-03-18 04:11:10,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [559744587] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:11:10,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:11:10,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-18 04:11:10,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474204823] [2022-03-18 04:11:10,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:11:10,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-18 04:11:10,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:11:10,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-18 04:11:10,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:11:10,921 INFO L87 Difference]: Start difference. First operand 749 states and 831 transitions. Second operand has 85 states, 85 states have (on average 6.811764705882353) internal successors, (579), 84 states have internal predecessors, (579), 84 states have call successors, (86), 84 states have call predecessors, (86), 82 states have return successors, (84), 82 states have call predecessors, (84), 83 states have call successors, (84) [2022-03-18 04:11:13,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:11:13,727 INFO L93 Difference]: Finished difference Result 763 states and 846 transitions. [2022-03-18 04:11:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-03-18 04:11:13,728 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 6.811764705882353) internal successors, (579), 84 states have internal predecessors, (579), 84 states have call successors, (86), 84 states have call predecessors, (86), 82 states have return successors, (84), 82 states have call predecessors, (84), 83 states have call successors, (84) Word has length 752 [2022-03-18 04:11:13,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:11:13,730 INFO L225 Difference]: With dead ends: 763 [2022-03-18 04:11:13,730 INFO L226 Difference]: Without dead ends: 758 [2022-03-18 04:11:13,733 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1400 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3438 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13499, Invalid=20541, Unknown=0, NotChecked=0, Total=34040 [2022-03-18 04:11:13,733 INFO L912 BasicCegarLoop]: 107 mSDtfsCounter, 392 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 04:11:13,733 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 724 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 04:11:13,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-03-18 04:11:13,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 758. [2022-03-18 04:11:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 586 states have (on average 1.1416382252559727) internal successors, (669), 586 states have internal predecessors, (669), 87 states have call successors, (87), 86 states have call predecessors, (87), 84 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-18 04:11:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 841 transitions. [2022-03-18 04:11:13,787 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 841 transitions. Word has length 752 [2022-03-18 04:11:13,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:11:13,788 INFO L478 AbstractCegarLoop]: Abstraction has 758 states and 841 transitions. [2022-03-18 04:11:13,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 6.811764705882353) internal successors, (579), 84 states have internal predecessors, (579), 84 states have call successors, (86), 84 states have call predecessors, (86), 82 states have return successors, (84), 82 states have call predecessors, (84), 83 states have call successors, (84) [2022-03-18 04:11:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 841 transitions. [2022-03-18 04:11:13,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2022-03-18 04:11:13,792 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:11:13,792 INFO L500 BasicCegarLoop]: trace histogram [83, 83, 82, 82, 82, 82, 82, 82, 82, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:11:13,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-18 04:11:13,993 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:11:13,993 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:11:13,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:11:13,993 INFO L85 PathProgramCache]: Analyzing trace with hash 345268182, now seen corresponding path program 163 times [2022-03-18 04:11:13,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:11:13,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1223414754] [2022-03-18 04:11:13,994 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:11:13,994 INFO L85 PathProgramCache]: Analyzing trace with hash 345268182, now seen corresponding path program 164 times [2022-03-18 04:11:13,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:11:13,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592195615] [2022-03-18 04:11:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:11:13,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:11:14,005 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:11:14,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694138888] [2022-03-18 04:11:14,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:11:14,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:11:14,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:11:14,007 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:11:14,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-18 04:11:14,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:11:14,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:11:14,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 169 conjunts are in the unsatisfiable core [2022-03-18 04:11:14,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:11:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 30221 backedges. 164 proven. 30053 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:11:17,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:11:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30221 backedges. 164 proven. 16769 refuted. 0 times theorem prover too weak. 13288 trivial. 0 not checked. [2022-03-18 04:11:19,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:11:19,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592195615] [2022-03-18 04:11:19,217 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:11:19,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694138888] [2022-03-18 04:11:19,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694138888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:11:19,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:11:19,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 104 [2022-03-18 04:11:19,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:11:19,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1223414754] [2022-03-18 04:11:19,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1223414754] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:11:19,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:11:19,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-18 04:11:19,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111183352] [2022-03-18 04:11:19,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:11:19,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-18 04:11:19,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:11:19,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-18 04:11:19,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:11:19,221 INFO L87 Difference]: Start difference. First operand 758 states and 841 transitions. Second operand has 86 states, 86 states have (on average 6.813953488372093) internal successors, (586), 85 states have internal predecessors, (586), 85 states have call successors, (87), 85 states have call predecessors, (87), 83 states have return successors, (85), 83 states have call predecessors, (85), 84 states have call successors, (85) [2022-03-18 04:11:22,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:11:22,185 INFO L93 Difference]: Finished difference Result 772 states and 856 transitions. [2022-03-18 04:11:22,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-03-18 04:11:22,185 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 6.813953488372093) internal successors, (586), 85 states have internal predecessors, (586), 85 states have call successors, (87), 85 states have call predecessors, (87), 83 states have return successors, (85), 83 states have call predecessors, (85), 84 states have call successors, (85) Word has length 761 [2022-03-18 04:11:22,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:11:22,187 INFO L225 Difference]: With dead ends: 772 [2022-03-18 04:11:22,187 INFO L226 Difference]: Without dead ends: 767 [2022-03-18 04:11:22,189 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1603 GetRequests, 1418 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3519 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13602, Invalid=20808, Unknown=0, NotChecked=0, Total=34410 [2022-03-18 04:11:22,189 INFO L912 BasicCegarLoop]: 108 mSDtfsCounter, 303 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 04:11:22,189 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 768 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 04:11:22,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-03-18 04:11:22,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2022-03-18 04:11:22,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 593 states have (on average 1.1416526138279932) internal successors, (677), 593 states have internal predecessors, (677), 88 states have call successors, (88), 87 states have call predecessors, (88), 85 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2022-03-18 04:11:22,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 851 transitions. [2022-03-18 04:11:22,231 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 851 transitions. Word has length 761 [2022-03-18 04:11:22,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:11:22,232 INFO L478 AbstractCegarLoop]: Abstraction has 767 states and 851 transitions. [2022-03-18 04:11:22,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 6.813953488372093) internal successors, (586), 85 states have internal predecessors, (586), 85 states have call successors, (87), 85 states have call predecessors, (87), 83 states have return successors, (85), 83 states have call predecessors, (85), 84 states have call successors, (85) [2022-03-18 04:11:22,232 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 851 transitions. [2022-03-18 04:11:22,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2022-03-18 04:11:22,236 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:11:22,236 INFO L500 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 83, 83, 83, 83, 83, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:11:22,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-18 04:11:22,437 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:11:22,437 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:11:22,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:11:22,437 INFO L85 PathProgramCache]: Analyzing trace with hash -620425124, now seen corresponding path program 165 times [2022-03-18 04:11:22,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:11:22,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [22362170] [2022-03-18 04:11:22,438 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:11:22,438 INFO L85 PathProgramCache]: Analyzing trace with hash -620425124, now seen corresponding path program 166 times [2022-03-18 04:11:22,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:11:22,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15937039] [2022-03-18 04:11:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:11:22,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:11:22,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:11:22,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184840105] [2022-03-18 04:11:22,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:11:22,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:11:22,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:11:22,450 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:11:22,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-18 04:11:22,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:11:22,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:11:22,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 2002 conjuncts, 171 conjunts are in the unsatisfiable core [2022-03-18 04:11:22,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:11:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 30963 backedges. 166 proven. 30793 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:11:25,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:11:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 30963 backedges. 166 proven. 17181 refuted. 0 times theorem prover too weak. 13616 trivial. 0 not checked. [2022-03-18 04:11:27,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:11:27,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15937039] [2022-03-18 04:11:27,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:11:27,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184840105] [2022-03-18 04:11:27,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184840105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:11:27,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:11:27,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 104 [2022-03-18 04:11:27,728 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:11:27,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [22362170] [2022-03-18 04:11:27,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [22362170] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:11:27,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:11:27,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-18 04:11:27,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506069202] [2022-03-18 04:11:27,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:11:27,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-18 04:11:27,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:11:27,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-18 04:11:27,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:11:27,730 INFO L87 Difference]: Start difference. First operand 767 states and 851 transitions. Second operand has 87 states, 87 states have (on average 6.816091954022989) internal successors, (593), 86 states have internal predecessors, (593), 86 states have call successors, (88), 86 states have call predecessors, (88), 84 states have return successors, (86), 84 states have call predecessors, (86), 85 states have call successors, (86) [2022-03-18 04:11:30,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:11:30,663 INFO L93 Difference]: Finished difference Result 781 states and 866 transitions. [2022-03-18 04:11:30,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-03-18 04:11:30,664 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 6.816091954022989) internal successors, (593), 86 states have internal predecessors, (593), 86 states have call successors, (88), 86 states have call predecessors, (88), 84 states have return successors, (86), 84 states have call predecessors, (86), 85 states have call successors, (86) Word has length 770 [2022-03-18 04:11:30,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:11:30,666 INFO L225 Difference]: With dead ends: 781 [2022-03-18 04:11:30,666 INFO L226 Difference]: Without dead ends: 776 [2022-03-18 04:11:30,669 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1622 GetRequests, 1436 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3601 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13705, Invalid=21077, Unknown=0, NotChecked=0, Total=34782 [2022-03-18 04:11:30,669 INFO L912 BasicCegarLoop]: 109 mSDtfsCounter, 315 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 04:11:30,669 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 764 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 04:11:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-03-18 04:11:30,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 776. [2022-03-18 04:11:30,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 600 states have (on average 1.1416666666666666) internal successors, (685), 600 states have internal predecessors, (685), 89 states have call successors, (89), 88 states have call predecessors, (89), 86 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-18 04:11:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 861 transitions. [2022-03-18 04:11:30,709 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 861 transitions. Word has length 770 [2022-03-18 04:11:30,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:11:30,709 INFO L478 AbstractCegarLoop]: Abstraction has 776 states and 861 transitions. [2022-03-18 04:11:30,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 6.816091954022989) internal successors, (593), 86 states have internal predecessors, (593), 86 states have call successors, (88), 86 states have call predecessors, (88), 84 states have return successors, (86), 84 states have call predecessors, (86), 85 states have call successors, (86) [2022-03-18 04:11:30,709 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 861 transitions. [2022-03-18 04:11:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2022-03-18 04:11:30,714 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:11:30,714 INFO L500 BasicCegarLoop]: trace histogram [85, 85, 84, 84, 84, 84, 84, 84, 84, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:11:30,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-18 04:11:30,914 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:11:30,914 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:11:30,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:11:30,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1362389354, now seen corresponding path program 167 times [2022-03-18 04:11:30,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:11:30,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1481931216] [2022-03-18 04:11:30,915 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:11:30,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1362389354, now seen corresponding path program 168 times [2022-03-18 04:11:30,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:11:30,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895865149] [2022-03-18 04:11:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:11:30,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:11:30,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:11:30,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188401327] [2022-03-18 04:11:30,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:11:30,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:11:30,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:11:30,936 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:11:30,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-18 04:11:31,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2022-03-18 04:11:31,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:11:31,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 2025 conjuncts, 173 conjunts are in the unsatisfiable core [2022-03-18 04:11:31,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:11:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 31714 backedges. 168 proven. 31542 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:11:34,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:11:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 31714 backedges. 168 proven. 17598 refuted. 0 times theorem prover too weak. 13948 trivial. 0 not checked. [2022-03-18 04:11:36,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:11:36,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895865149] [2022-03-18 04:11:36,555 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:11:36,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188401327] [2022-03-18 04:11:36,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188401327] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:11:36,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:11:36,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 104 [2022-03-18 04:11:36,555 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:11:36,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1481931216] [2022-03-18 04:11:36,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1481931216] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:11:36,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:11:36,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-18 04:11:36,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665530220] [2022-03-18 04:11:36,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:11:36,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-18 04:11:36,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:11:36,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-18 04:11:36,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:11:36,557 INFO L87 Difference]: Start difference. First operand 776 states and 861 transitions. Second operand has 88 states, 88 states have (on average 6.818181818181818) internal successors, (600), 87 states have internal predecessors, (600), 87 states have call successors, (89), 87 states have call predecessors, (89), 85 states have return successors, (87), 85 states have call predecessors, (87), 86 states have call successors, (87) [2022-03-18 04:11:39,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:11:39,554 INFO L93 Difference]: Finished difference Result 790 states and 876 transitions. [2022-03-18 04:11:39,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-03-18 04:11:39,554 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 6.818181818181818) internal successors, (600), 87 states have internal predecessors, (600), 87 states have call successors, (89), 87 states have call predecessors, (89), 85 states have return successors, (87), 85 states have call predecessors, (87), 86 states have call successors, (87) Word has length 779 [2022-03-18 04:11:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:11:39,557 INFO L225 Difference]: With dead ends: 790 [2022-03-18 04:11:39,557 INFO L226 Difference]: Without dead ends: 785 [2022-03-18 04:11:39,559 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1641 GetRequests, 1454 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3684 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13808, Invalid=21348, Unknown=0, NotChecked=0, Total=35156 [2022-03-18 04:11:39,559 INFO L912 BasicCegarLoop]: 110 mSDtfsCounter, 314 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 04:11:39,559 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 766 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 04:11:39,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-03-18 04:11:39,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 785. [2022-03-18 04:11:39,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 607 states have (on average 1.14168039538715) internal successors, (693), 607 states have internal predecessors, (693), 90 states have call successors, (90), 89 states have call predecessors, (90), 87 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2022-03-18 04:11:39,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 871 transitions. [2022-03-18 04:11:39,599 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 871 transitions. Word has length 779 [2022-03-18 04:11:39,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:11:39,600 INFO L478 AbstractCegarLoop]: Abstraction has 785 states and 871 transitions. [2022-03-18 04:11:39,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 6.818181818181818) internal successors, (600), 87 states have internal predecessors, (600), 87 states have call successors, (89), 87 states have call predecessors, (89), 85 states have return successors, (87), 85 states have call predecessors, (87), 86 states have call successors, (87) [2022-03-18 04:11:39,600 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 871 transitions. [2022-03-18 04:11:39,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 789 [2022-03-18 04:11:39,605 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:11:39,605 INFO L500 BasicCegarLoop]: trace histogram [86, 86, 85, 85, 85, 85, 85, 85, 85, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:11:39,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-18 04:11:39,805 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:11:39,805 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:11:39,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:11:39,805 INFO L85 PathProgramCache]: Analyzing trace with hash -2086702692, now seen corresponding path program 169 times [2022-03-18 04:11:39,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:11:39,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [803264501] [2022-03-18 04:11:39,806 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:11:39,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2086702692, now seen corresponding path program 170 times [2022-03-18 04:11:39,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:11:39,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694465519] [2022-03-18 04:11:39,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:11:39,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:11:39,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:11:39,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148000983] [2022-03-18 04:11:39,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:11:39,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:11:39,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:11:39,819 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:11:39,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-18 04:11:40,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:11:40,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:11:40,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 2048 conjuncts, 175 conjunts are in the unsatisfiable core [2022-03-18 04:11:40,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:11:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 32474 backedges. 170 proven. 32300 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:11:43,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:11:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 32474 backedges. 170 proven. 18020 refuted. 0 times theorem prover too weak. 14284 trivial. 0 not checked. [2022-03-18 04:11:45,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:11:45,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694465519] [2022-03-18 04:11:45,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:11:45,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148000983] [2022-03-18 04:11:45,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148000983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:11:45,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:11:45,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 104 [2022-03-18 04:11:45,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:11:45,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [803264501] [2022-03-18 04:11:45,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [803264501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:11:45,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:11:45,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-18 04:11:45,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330684891] [2022-03-18 04:11:45,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:11:45,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-18 04:11:45,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:11:45,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-18 04:11:45,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:11:45,138 INFO L87 Difference]: Start difference. First operand 785 states and 871 transitions. Second operand has 89 states, 89 states have (on average 6.820224719101123) internal successors, (607), 88 states have internal predecessors, (607), 88 states have call successors, (90), 88 states have call predecessors, (90), 86 states have return successors, (88), 86 states have call predecessors, (88), 87 states have call successors, (88) [2022-03-18 04:11:48,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:11:48,193 INFO L93 Difference]: Finished difference Result 799 states and 886 transitions. [2022-03-18 04:11:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-03-18 04:11:48,194 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 6.820224719101123) internal successors, (607), 88 states have internal predecessors, (607), 88 states have call successors, (90), 88 states have call predecessors, (90), 86 states have return successors, (88), 86 states have call predecessors, (88), 87 states have call successors, (88) Word has length 788 [2022-03-18 04:11:48,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:11:48,195 INFO L225 Difference]: With dead ends: 799 [2022-03-18 04:11:48,195 INFO L226 Difference]: Without dead ends: 794 [2022-03-18 04:11:48,197 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1660 GetRequests, 1472 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3768 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13911, Invalid=21621, Unknown=0, NotChecked=0, Total=35532 [2022-03-18 04:11:48,197 INFO L912 BasicCegarLoop]: 111 mSDtfsCounter, 341 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 04:11:48,198 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 768 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 04:11:48,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-03-18 04:11:48,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 794. [2022-03-18 04:11:48,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 614 states have (on average 1.1416938110749186) internal successors, (701), 614 states have internal predecessors, (701), 91 states have call successors, (91), 90 states have call predecessors, (91), 88 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2022-03-18 04:11:48,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 881 transitions. [2022-03-18 04:11:48,254 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 881 transitions. Word has length 788 [2022-03-18 04:11:48,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:11:48,255 INFO L478 AbstractCegarLoop]: Abstraction has 794 states and 881 transitions. [2022-03-18 04:11:48,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 6.820224719101123) internal successors, (607), 88 states have internal predecessors, (607), 88 states have call successors, (90), 88 states have call predecessors, (90), 86 states have return successors, (88), 86 states have call predecessors, (88), 87 states have call successors, (88) [2022-03-18 04:11:48,255 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 881 transitions. [2022-03-18 04:11:48,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2022-03-18 04:11:48,259 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:11:48,260 INFO L500 BasicCegarLoop]: trace histogram [87, 87, 86, 86, 86, 86, 86, 86, 86, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:11:48,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-18 04:11:48,460 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-18 04:11:48,460 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:11:48,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:11:48,460 INFO L85 PathProgramCache]: Analyzing trace with hash -106259114, now seen corresponding path program 171 times [2022-03-18 04:11:48,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:11:48,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [343094780] [2022-03-18 04:11:48,461 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:11:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash -106259114, now seen corresponding path program 172 times [2022-03-18 04:11:48,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:11:48,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890358684] [2022-03-18 04:11:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:11:48,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:11:48,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:11:48,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377424476] [2022-03-18 04:11:48,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:11:48,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:11:48,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:11:48,478 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:11:48,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-18 04:11:48,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:11:48,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:11:48,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 2071 conjuncts, 177 conjunts are in the unsatisfiable core [2022-03-18 04:11:48,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:11:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 33243 backedges. 172 proven. 33067 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:11:51,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:11:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 33243 backedges. 172 proven. 18447 refuted. 0 times theorem prover too weak. 14624 trivial. 0 not checked. [2022-03-18 04:11:53,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:11:53,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890358684] [2022-03-18 04:11:53,786 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:11:53,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377424476] [2022-03-18 04:11:53,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377424476] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:11:53,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:11:53,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 104 [2022-03-18 04:11:53,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:11:53,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [343094780] [2022-03-18 04:11:53,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [343094780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:11:53,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:11:53,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-18 04:11:53,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9644131] [2022-03-18 04:11:53,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:11:53,788 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-18 04:11:53,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:11:53,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-18 04:11:53,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:11:53,790 INFO L87 Difference]: Start difference. First operand 794 states and 881 transitions. Second operand has 90 states, 90 states have (on average 6.822222222222222) internal successors, (614), 89 states have internal predecessors, (614), 89 states have call successors, (91), 89 states have call predecessors, (91), 87 states have return successors, (89), 87 states have call predecessors, (89), 88 states have call successors, (89) [2022-03-18 04:11:56,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:11:56,915 INFO L93 Difference]: Finished difference Result 808 states and 896 transitions. [2022-03-18 04:11:56,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-03-18 04:11:56,916 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 6.822222222222222) internal successors, (614), 89 states have internal predecessors, (614), 89 states have call successors, (91), 89 states have call predecessors, (91), 87 states have return successors, (89), 87 states have call predecessors, (89), 88 states have call successors, (89) Word has length 797 [2022-03-18 04:11:56,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:11:56,917 INFO L225 Difference]: With dead ends: 808 [2022-03-18 04:11:56,917 INFO L226 Difference]: Without dead ends: 803 [2022-03-18 04:11:56,919 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1679 GetRequests, 1490 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3853 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=14014, Invalid=21896, Unknown=0, NotChecked=0, Total=35910 [2022-03-18 04:11:56,920 INFO L912 BasicCegarLoop]: 112 mSDtfsCounter, 390 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 04:11:56,920 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 764 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 04:11:56,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-03-18 04:11:56,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 803. [2022-03-18 04:11:56,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 621 states have (on average 1.14170692431562) internal successors, (709), 621 states have internal predecessors, (709), 92 states have call successors, (92), 91 states have call predecessors, (92), 89 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) [2022-03-18 04:11:56,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 891 transitions. [2022-03-18 04:11:56,974 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 891 transitions. Word has length 797 [2022-03-18 04:11:56,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:11:56,975 INFO L478 AbstractCegarLoop]: Abstraction has 803 states and 891 transitions. [2022-03-18 04:11:56,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 6.822222222222222) internal successors, (614), 89 states have internal predecessors, (614), 89 states have call successors, (91), 89 states have call predecessors, (91), 87 states have return successors, (89), 87 states have call predecessors, (89), 88 states have call successors, (89) [2022-03-18 04:11:56,975 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 891 transitions. [2022-03-18 04:11:56,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 807 [2022-03-18 04:11:56,981 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:11:56,981 INFO L500 BasicCegarLoop]: trace histogram [88, 88, 87, 87, 87, 87, 87, 87, 87, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:11:57,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-18 04:11:57,181 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-18 04:11:57,182 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:11:57,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:11:57,182 INFO L85 PathProgramCache]: Analyzing trace with hash -212073764, now seen corresponding path program 173 times [2022-03-18 04:11:57,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:11:57,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [298208695] [2022-03-18 04:11:57,182 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:11:57,183 INFO L85 PathProgramCache]: Analyzing trace with hash -212073764, now seen corresponding path program 174 times [2022-03-18 04:11:57,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:11:57,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110549677] [2022-03-18 04:11:57,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:11:57,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:11:57,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:11:57,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735540518] [2022-03-18 04:11:57,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:11:57,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:11:57,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:11:57,195 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:11:57,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-18 04:11:57,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 88 check-sat command(s) [2022-03-18 04:11:57,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:11:57,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 2094 conjuncts, 179 conjunts are in the unsatisfiable core [2022-03-18 04:11:57,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:12:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 34021 backedges. 174 proven. 33843 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:12:01,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:12:03,075 INFO L134 CoverageAnalysis]: Checked inductivity of 34021 backedges. 174 proven. 18879 refuted. 0 times theorem prover too weak. 14968 trivial. 0 not checked. [2022-03-18 04:12:03,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:12:03,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110549677] [2022-03-18 04:12:03,075 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:12:03,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735540518] [2022-03-18 04:12:03,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735540518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:12:03,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:12:03,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 104 [2022-03-18 04:12:03,076 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:12:03,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [298208695] [2022-03-18 04:12:03,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [298208695] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:12:03,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:12:03,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-18 04:12:03,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102810268] [2022-03-18 04:12:03,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:12:03,077 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-18 04:12:03,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:12:03,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-18 04:12:03,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:12:03,078 INFO L87 Difference]: Start difference. First operand 803 states and 891 transitions. Second operand has 91 states, 91 states have (on average 6.824175824175824) internal successors, (621), 90 states have internal predecessors, (621), 90 states have call successors, (92), 90 states have call predecessors, (92), 88 states have return successors, (90), 88 states have call predecessors, (90), 89 states have call successors, (90) [2022-03-18 04:12:06,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:12:06,279 INFO L93 Difference]: Finished difference Result 817 states and 906 transitions. [2022-03-18 04:12:06,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2022-03-18 04:12:06,279 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 6.824175824175824) internal successors, (621), 90 states have internal predecessors, (621), 90 states have call successors, (92), 90 states have call predecessors, (92), 88 states have return successors, (90), 88 states have call predecessors, (90), 89 states have call successors, (90) Word has length 806 [2022-03-18 04:12:06,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:12:06,281 INFO L225 Difference]: With dead ends: 817 [2022-03-18 04:12:06,281 INFO L226 Difference]: Without dead ends: 812 [2022-03-18 04:12:06,283 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1698 GetRequests, 1508 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3939 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=14117, Invalid=22173, Unknown=0, NotChecked=0, Total=36290 [2022-03-18 04:12:06,283 INFO L912 BasicCegarLoop]: 113 mSDtfsCounter, 341 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 04:12:06,284 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 784 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 04:12:06,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-03-18 04:12:06,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2022-03-18 04:12:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 628 states have (on average 1.14171974522293) internal successors, (717), 628 states have internal predecessors, (717), 93 states have call successors, (93), 92 states have call predecessors, (93), 90 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-18 04:12:06,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 901 transitions. [2022-03-18 04:12:06,362 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 901 transitions. Word has length 806 [2022-03-18 04:12:06,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:12:06,363 INFO L478 AbstractCegarLoop]: Abstraction has 812 states and 901 transitions. [2022-03-18 04:12:06,363 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 6.824175824175824) internal successors, (621), 90 states have internal predecessors, (621), 90 states have call successors, (92), 90 states have call predecessors, (92), 88 states have return successors, (90), 88 states have call predecessors, (90), 89 states have call successors, (90) [2022-03-18 04:12:06,363 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 901 transitions. [2022-03-18 04:12:06,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 816 [2022-03-18 04:12:06,369 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:12:06,369 INFO L500 BasicCegarLoop]: trace histogram [89, 89, 88, 88, 88, 88, 88, 88, 88, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:12:06,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-18 04:12:06,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:12:06,580 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:12:06,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:12:06,580 INFO L85 PathProgramCache]: Analyzing trace with hash 685601814, now seen corresponding path program 175 times [2022-03-18 04:12:06,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:12:06,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1709895860] [2022-03-18 04:12:06,581 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:12:06,581 INFO L85 PathProgramCache]: Analyzing trace with hash 685601814, now seen corresponding path program 176 times [2022-03-18 04:12:06,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:12:06,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204561260] [2022-03-18 04:12:06,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:12:06,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:12:06,592 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:12:06,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029096653] [2022-03-18 04:12:06,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:12:06,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:12:06,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:12:06,593 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:12:06,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-18 04:12:06,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:12:06,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:12:06,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 2117 conjuncts, 181 conjunts are in the unsatisfiable core [2022-03-18 04:12:06,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:12:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 34808 backedges. 176 proven. 34628 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:12:10,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:12:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 34808 backedges. 176 proven. 19316 refuted. 0 times theorem prover too weak. 15316 trivial. 0 not checked. [2022-03-18 04:12:11,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:12:11,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204561260] [2022-03-18 04:12:11,995 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:12:11,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029096653] [2022-03-18 04:12:11,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029096653] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:12:11,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:12:11,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 104 [2022-03-18 04:12:11,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:12:11,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1709895860] [2022-03-18 04:12:11,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1709895860] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:12:11,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:12:11,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-18 04:12:11,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083620218] [2022-03-18 04:12:11,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:12:11,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-18 04:12:11,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:12:11,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-18 04:12:11,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:12:11,998 INFO L87 Difference]: Start difference. First operand 812 states and 901 transitions. Second operand has 92 states, 92 states have (on average 6.826086956521739) internal successors, (628), 91 states have internal predecessors, (628), 91 states have call successors, (93), 91 states have call predecessors, (93), 89 states have return successors, (91), 89 states have call predecessors, (91), 90 states have call successors, (91) [2022-03-18 04:12:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:12:15,293 INFO L93 Difference]: Finished difference Result 826 states and 916 transitions. [2022-03-18 04:12:15,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-03-18 04:12:15,293 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 6.826086956521739) internal successors, (628), 91 states have internal predecessors, (628), 91 states have call successors, (93), 91 states have call predecessors, (93), 89 states have return successors, (91), 89 states have call predecessors, (91), 90 states have call successors, (91) Word has length 815 [2022-03-18 04:12:15,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:12:15,295 INFO L225 Difference]: With dead ends: 826 [2022-03-18 04:12:15,295 INFO L226 Difference]: Without dead ends: 821 [2022-03-18 04:12:15,297 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1717 GetRequests, 1526 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4026 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=14220, Invalid=22452, Unknown=0, NotChecked=0, Total=36672 [2022-03-18 04:12:15,297 INFO L912 BasicCegarLoop]: 114 mSDtfsCounter, 303 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 04:12:15,297 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 810 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 04:12:15,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-03-18 04:12:15,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 821. [2022-03-18 04:12:15,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 635 states have (on average 1.141732283464567) internal successors, (725), 635 states have internal predecessors, (725), 94 states have call successors, (94), 93 states have call predecessors, (94), 91 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-03-18 04:12:15,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 911 transitions. [2022-03-18 04:12:15,354 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 911 transitions. Word has length 815 [2022-03-18 04:12:15,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:12:15,354 INFO L478 AbstractCegarLoop]: Abstraction has 821 states and 911 transitions. [2022-03-18 04:12:15,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 6.826086956521739) internal successors, (628), 91 states have internal predecessors, (628), 91 states have call successors, (93), 91 states have call predecessors, (93), 89 states have return successors, (91), 89 states have call predecessors, (91), 90 states have call successors, (91) [2022-03-18 04:12:15,355 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 911 transitions. [2022-03-18 04:12:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 825 [2022-03-18 04:12:15,359 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:12:15,359 INFO L500 BasicCegarLoop]: trace histogram [90, 90, 89, 89, 89, 89, 89, 89, 89, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:12:15,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-18 04:12:15,560 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:12:15,560 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:12:15,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:12:15,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1477362716, now seen corresponding path program 177 times [2022-03-18 04:12:15,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:12:15,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [40399246] [2022-03-18 04:12:15,561 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:12:15,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1477362716, now seen corresponding path program 178 times [2022-03-18 04:12:15,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:12:15,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550659352] [2022-03-18 04:12:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:12:15,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:12:15,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:12:15,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849278764] [2022-03-18 04:12:15,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:12:15,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:12:15,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:12:15,577 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:12:15,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-18 04:12:15,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:12:15,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:12:15,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 2140 conjuncts, 183 conjunts are in the unsatisfiable core [2022-03-18 04:12:15,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:12:19,305 INFO L134 CoverageAnalysis]: Checked inductivity of 35604 backedges. 178 proven. 35422 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:12:19,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:12:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 35604 backedges. 178 proven. 19758 refuted. 0 times theorem prover too weak. 15668 trivial. 0 not checked. [2022-03-18 04:12:21,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:12:21,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550659352] [2022-03-18 04:12:21,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:12:21,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849278764] [2022-03-18 04:12:21,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849278764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:12:21,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:12:21,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 104 [2022-03-18 04:12:21,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:12:21,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [40399246] [2022-03-18 04:12:21,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [40399246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:12:21,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:12:21,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-18 04:12:21,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086928043] [2022-03-18 04:12:21,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:12:21,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-18 04:12:21,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:12:21,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-18 04:12:21,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:12:21,004 INFO L87 Difference]: Start difference. First operand 821 states and 911 transitions. Second operand has 93 states, 93 states have (on average 6.827956989247312) internal successors, (635), 92 states have internal predecessors, (635), 92 states have call successors, (94), 92 states have call predecessors, (94), 90 states have return successors, (92), 90 states have call predecessors, (92), 91 states have call successors, (92) [2022-03-18 04:12:24,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:12:24,428 INFO L93 Difference]: Finished difference Result 835 states and 926 transitions. [2022-03-18 04:12:24,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2022-03-18 04:12:24,429 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 6.827956989247312) internal successors, (635), 92 states have internal predecessors, (635), 92 states have call successors, (94), 92 states have call predecessors, (94), 90 states have return successors, (92), 90 states have call predecessors, (92), 91 states have call successors, (92) Word has length 824 [2022-03-18 04:12:24,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:12:24,431 INFO L225 Difference]: With dead ends: 835 [2022-03-18 04:12:24,431 INFO L226 Difference]: Without dead ends: 830 [2022-03-18 04:12:24,432 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1736 GetRequests, 1544 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4114 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14323, Invalid=22733, Unknown=0, NotChecked=0, Total=37056 [2022-03-18 04:12:24,432 INFO L912 BasicCegarLoop]: 115 mSDtfsCounter, 318 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 04:12:24,432 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 818 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 04:12:24,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-03-18 04:12:24,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 830. [2022-03-18 04:12:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 642 states have (on average 1.1417445482866044) internal successors, (733), 642 states have internal predecessors, (733), 95 states have call successors, (95), 94 states have call predecessors, (95), 92 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2022-03-18 04:12:24,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 921 transitions. [2022-03-18 04:12:24,486 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 921 transitions. Word has length 824 [2022-03-18 04:12:24,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:12:24,487 INFO L478 AbstractCegarLoop]: Abstraction has 830 states and 921 transitions. [2022-03-18 04:12:24,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 6.827956989247312) internal successors, (635), 92 states have internal predecessors, (635), 92 states have call successors, (94), 92 states have call predecessors, (94), 90 states have return successors, (92), 90 states have call predecessors, (92), 91 states have call successors, (92) [2022-03-18 04:12:24,487 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 921 transitions. [2022-03-18 04:12:24,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 834 [2022-03-18 04:12:24,493 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:12:24,493 INFO L500 BasicCegarLoop]: trace histogram [91, 91, 90, 90, 90, 90, 90, 90, 90, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:12:24,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-18 04:12:24,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:12:24,693 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:12:24,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:12:24,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1561336534, now seen corresponding path program 179 times [2022-03-18 04:12:24,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:12:24,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1191368035] [2022-03-18 04:12:24,694 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:12:24,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1561336534, now seen corresponding path program 180 times [2022-03-18 04:12:24,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:12:24,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929617729] [2022-03-18 04:12:24,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:12:24,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:12:24,706 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:12:24,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292332213] [2022-03-18 04:12:24,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:12:24,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:12:24,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:12:24,707 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:12:24,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-18 04:12:25,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2022-03-18 04:12:25,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:12:25,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 2163 conjuncts, 185 conjunts are in the unsatisfiable core [2022-03-18 04:12:25,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:12:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 36409 backedges. 180 proven. 36225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:12:29,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:12:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 36409 backedges. 180 proven. 20205 refuted. 0 times theorem prover too weak. 16024 trivial. 0 not checked. [2022-03-18 04:12:30,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:12:30,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929617729] [2022-03-18 04:12:30,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:12:30,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292332213] [2022-03-18 04:12:30,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292332213] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:12:30,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:12:30,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 104 [2022-03-18 04:12:30,719 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:12:30,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1191368035] [2022-03-18 04:12:30,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1191368035] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:12:30,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:12:30,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-18 04:12:30,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890183489] [2022-03-18 04:12:30,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:12:30,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-18 04:12:30,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:12:30,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-18 04:12:30,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:12:30,722 INFO L87 Difference]: Start difference. First operand 830 states and 921 transitions. Second operand has 94 states, 94 states have (on average 6.829787234042553) internal successors, (642), 93 states have internal predecessors, (642), 93 states have call successors, (95), 93 states have call predecessors, (95), 91 states have return successors, (93), 91 states have call predecessors, (93), 92 states have call successors, (93) [2022-03-18 04:12:34,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:12:34,152 INFO L93 Difference]: Finished difference Result 844 states and 936 transitions. [2022-03-18 04:12:34,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-03-18 04:12:34,152 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 6.829787234042553) internal successors, (642), 93 states have internal predecessors, (642), 93 states have call successors, (95), 93 states have call predecessors, (95), 91 states have return successors, (93), 91 states have call predecessors, (93), 92 states have call successors, (93) Word has length 833 [2022-03-18 04:12:34,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:12:34,154 INFO L225 Difference]: With dead ends: 844 [2022-03-18 04:12:34,154 INFO L226 Difference]: Without dead ends: 839 [2022-03-18 04:12:34,155 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1755 GetRequests, 1562 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4203 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=14426, Invalid=23016, Unknown=0, NotChecked=0, Total=37442 [2022-03-18 04:12:34,156 INFO L912 BasicCegarLoop]: 116 mSDtfsCounter, 424 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 04:12:34,156 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 808 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 04:12:34,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-03-18 04:12:34,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 839. [2022-03-18 04:12:34,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 649 states have (on average 1.1417565485362096) internal successors, (741), 649 states have internal predecessors, (741), 96 states have call successors, (96), 95 states have call predecessors, (96), 93 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-18 04:12:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 931 transitions. [2022-03-18 04:12:34,200 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 931 transitions. Word has length 833 [2022-03-18 04:12:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:12:34,200 INFO L478 AbstractCegarLoop]: Abstraction has 839 states and 931 transitions. [2022-03-18 04:12:34,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 6.829787234042553) internal successors, (642), 93 states have internal predecessors, (642), 93 states have call successors, (95), 93 states have call predecessors, (95), 91 states have return successors, (93), 91 states have call predecessors, (93), 92 states have call successors, (93) [2022-03-18 04:12:34,200 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 931 transitions. [2022-03-18 04:12:34,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 843 [2022-03-18 04:12:34,205 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:12:34,205 INFO L500 BasicCegarLoop]: trace histogram [92, 92, 91, 91, 91, 91, 91, 91, 91, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:12:34,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-18 04:12:34,406 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:12:34,406 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:12:34,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:12:34,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1836337828, now seen corresponding path program 181 times [2022-03-18 04:12:34,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:12:34,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [272756647] [2022-03-18 04:12:34,407 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:12:34,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1836337828, now seen corresponding path program 182 times [2022-03-18 04:12:34,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:12:34,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139501870] [2022-03-18 04:12:34,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:12:34,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:12:34,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:12:34,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752235436] [2022-03-18 04:12:34,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:12:34,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:12:34,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:12:34,425 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:12:34,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-18 04:12:34,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:12:34,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:12:34,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 2186 conjuncts, 187 conjunts are in the unsatisfiable core [2022-03-18 04:12:34,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:12:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 37223 backedges. 182 proven. 37037 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:12:38,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:12:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 37223 backedges. 182 proven. 20657 refuted. 0 times theorem prover too weak. 16384 trivial. 0 not checked. [2022-03-18 04:12:39,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:12:39,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139501870] [2022-03-18 04:12:39,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:12:39,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752235436] [2022-03-18 04:12:39,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752235436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:12:39,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:12:39,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 104 [2022-03-18 04:12:39,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:12:39,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [272756647] [2022-03-18 04:12:39,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [272756647] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:12:39,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:12:39,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-18 04:12:39,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248852267] [2022-03-18 04:12:39,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:12:39,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-18 04:12:39,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:12:39,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-18 04:12:39,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:12:39,892 INFO L87 Difference]: Start difference. First operand 839 states and 931 transitions. Second operand has 95 states, 95 states have (on average 6.831578947368421) internal successors, (649), 94 states have internal predecessors, (649), 94 states have call successors, (96), 94 states have call predecessors, (96), 92 states have return successors, (94), 92 states have call predecessors, (94), 93 states have call successors, (94) [2022-03-18 04:12:43,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:12:43,395 INFO L93 Difference]: Finished difference Result 853 states and 946 transitions. [2022-03-18 04:12:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2022-03-18 04:12:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 6.831578947368421) internal successors, (649), 94 states have internal predecessors, (649), 94 states have call successors, (96), 94 states have call predecessors, (96), 92 states have return successors, (94), 92 states have call predecessors, (94), 93 states have call successors, (94) Word has length 842 [2022-03-18 04:12:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:12:43,398 INFO L225 Difference]: With dead ends: 853 [2022-03-18 04:12:43,398 INFO L226 Difference]: Without dead ends: 848 [2022-03-18 04:12:43,399 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1774 GetRequests, 1580 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4293 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14529, Invalid=23301, Unknown=0, NotChecked=0, Total=37830 [2022-03-18 04:12:43,400 INFO L912 BasicCegarLoop]: 117 mSDtfsCounter, 423 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 04:12:43,400 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 822 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 04:12:43,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-03-18 04:12:43,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 848. [2022-03-18 04:12:43,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 656 states have (on average 1.141768292682927) internal successors, (749), 656 states have internal predecessors, (749), 97 states have call successors, (97), 96 states have call predecessors, (97), 94 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-18 04:12:43,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 941 transitions. [2022-03-18 04:12:43,445 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 941 transitions. Word has length 842 [2022-03-18 04:12:43,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:12:43,445 INFO L478 AbstractCegarLoop]: Abstraction has 848 states and 941 transitions. [2022-03-18 04:12:43,446 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 6.831578947368421) internal successors, (649), 94 states have internal predecessors, (649), 94 states have call successors, (96), 94 states have call predecessors, (96), 92 states have return successors, (94), 92 states have call predecessors, (94), 93 states have call successors, (94) [2022-03-18 04:12:43,446 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 941 transitions. [2022-03-18 04:12:43,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2022-03-18 04:12:43,451 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:12:43,451 INFO L500 BasicCegarLoop]: trace histogram [93, 93, 92, 92, 92, 92, 92, 92, 92, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:12:43,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-18 04:12:43,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:12:43,651 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:12:43,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:12:43,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1676579222, now seen corresponding path program 183 times [2022-03-18 04:12:43,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:12:43,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1289516636] [2022-03-18 04:12:43,652 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:12:43,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1676579222, now seen corresponding path program 184 times [2022-03-18 04:12:43,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:12:43,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461169932] [2022-03-18 04:12:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:12:43,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:12:43,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:12:43,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210899257] [2022-03-18 04:12:43,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:12:43,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:12:43,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:12:43,666 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:12:43,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-18 04:12:43,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:12:43,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:12:43,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 2209 conjuncts, 189 conjunts are in the unsatisfiable core [2022-03-18 04:12:43,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:12:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 38046 backedges. 184 proven. 37858 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:12:47,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:12:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 38046 backedges. 184 proven. 21114 refuted. 0 times theorem prover too weak. 16748 trivial. 0 not checked. [2022-03-18 04:12:49,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:12:49,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461169932] [2022-03-18 04:12:49,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:12:49,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210899257] [2022-03-18 04:12:49,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210899257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:12:49,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:12:49,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 104 [2022-03-18 04:12:49,191 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:12:49,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1289516636] [2022-03-18 04:12:49,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1289516636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:12:49,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:12:49,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-18 04:12:49,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777514628] [2022-03-18 04:12:49,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:12:49,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-18 04:12:49,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:12:49,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-18 04:12:49,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:12:49,193 INFO L87 Difference]: Start difference. First operand 848 states and 941 transitions. Second operand has 96 states, 96 states have (on average 6.833333333333333) internal successors, (656), 95 states have internal predecessors, (656), 95 states have call successors, (97), 95 states have call predecessors, (97), 93 states have return successors, (95), 93 states have call predecessors, (95), 94 states have call successors, (95) [2022-03-18 04:12:52,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:12:52,727 INFO L93 Difference]: Finished difference Result 862 states and 956 transitions. [2022-03-18 04:12:52,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-03-18 04:12:52,727 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 6.833333333333333) internal successors, (656), 95 states have internal predecessors, (656), 95 states have call successors, (97), 95 states have call predecessors, (97), 93 states have return successors, (95), 93 states have call predecessors, (95), 94 states have call successors, (95) Word has length 851 [2022-03-18 04:12:52,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:12:52,729 INFO L225 Difference]: With dead ends: 862 [2022-03-18 04:12:52,729 INFO L226 Difference]: Without dead ends: 857 [2022-03-18 04:12:52,732 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1793 GetRequests, 1598 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4384 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14632, Invalid=23588, Unknown=0, NotChecked=0, Total=38220 [2022-03-18 04:12:52,732 INFO L912 BasicCegarLoop]: 118 mSDtfsCounter, 383 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 04:12:52,732 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 836 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 04:12:52,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-03-18 04:12:52,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 857. [2022-03-18 04:12:52,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 663 states have (on average 1.1417797888386123) internal successors, (757), 663 states have internal predecessors, (757), 98 states have call successors, (98), 97 states have call predecessors, (98), 95 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2022-03-18 04:12:52,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 951 transitions. [2022-03-18 04:12:52,792 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 951 transitions. Word has length 851 [2022-03-18 04:12:52,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:12:52,793 INFO L478 AbstractCegarLoop]: Abstraction has 857 states and 951 transitions. [2022-03-18 04:12:52,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 6.833333333333333) internal successors, (656), 95 states have internal predecessors, (656), 95 states have call successors, (97), 95 states have call predecessors, (97), 93 states have return successors, (95), 93 states have call predecessors, (95), 94 states have call successors, (95) [2022-03-18 04:12:52,793 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 951 transitions. [2022-03-18 04:12:52,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 861 [2022-03-18 04:12:52,798 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:12:52,798 INFO L500 BasicCegarLoop]: trace histogram [94, 94, 93, 93, 93, 93, 93, 93, 93, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:12:52,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-18 04:12:52,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-18 04:12:52,999 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:12:52,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:12:52,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1990645404, now seen corresponding path program 185 times [2022-03-18 04:12:52,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:12:52,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1782125151] [2022-03-18 04:12:53,000 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:12:53,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1990645404, now seen corresponding path program 186 times [2022-03-18 04:12:53,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:12:53,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913178216] [2022-03-18 04:12:53,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:12:53,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:12:53,015 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:12:53,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358516415] [2022-03-18 04:12:53,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:12:53,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:12:53,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:12:53,016 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:12:53,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-18 04:12:53,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 94 check-sat command(s) [2022-03-18 04:12:53,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:12:53,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 2232 conjuncts, 191 conjunts are in the unsatisfiable core [2022-03-18 04:12:53,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:12:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 38878 backedges. 186 proven. 38688 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:12:57,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:12:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 38878 backedges. 186 proven. 21576 refuted. 0 times theorem prover too weak. 17116 trivial. 0 not checked. [2022-03-18 04:12:59,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:12:59,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913178216] [2022-03-18 04:12:59,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:12:59,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358516415] [2022-03-18 04:12:59,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358516415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:12:59,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:12:59,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 104 [2022-03-18 04:12:59,107 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:12:59,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1782125151] [2022-03-18 04:12:59,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1782125151] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:12:59,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:12:59,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-18 04:12:59,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271244218] [2022-03-18 04:12:59,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:12:59,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-18 04:12:59,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:12:59,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-18 04:12:59,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:12:59,110 INFO L87 Difference]: Start difference. First operand 857 states and 951 transitions. Second operand has 97 states, 97 states have (on average 6.835051546391752) internal successors, (663), 96 states have internal predecessors, (663), 96 states have call successors, (98), 96 states have call predecessors, (98), 94 states have return successors, (96), 94 states have call predecessors, (96), 95 states have call successors, (96) [2022-03-18 04:13:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:13:02,797 INFO L93 Difference]: Finished difference Result 871 states and 966 transitions. [2022-03-18 04:13:02,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-03-18 04:13:02,797 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 6.835051546391752) internal successors, (663), 96 states have internal predecessors, (663), 96 states have call successors, (98), 96 states have call predecessors, (98), 94 states have return successors, (96), 94 states have call predecessors, (96), 95 states have call successors, (96) Word has length 860 [2022-03-18 04:13:02,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:13:02,799 INFO L225 Difference]: With dead ends: 871 [2022-03-18 04:13:02,799 INFO L226 Difference]: Without dead ends: 866 [2022-03-18 04:13:02,801 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1812 GetRequests, 1616 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4476 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14735, Invalid=23877, Unknown=0, NotChecked=0, Total=38612 [2022-03-18 04:13:02,801 INFO L912 BasicCegarLoop]: 119 mSDtfsCounter, 446 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 04:13:02,801 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 844 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 04:13:02,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-03-18 04:13:02,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2022-03-18 04:13:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 670 states have (on average 1.1417910447761195) internal successors, (765), 670 states have internal predecessors, (765), 99 states have call successors, (99), 98 states have call predecessors, (99), 96 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-03-18 04:13:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 961 transitions. [2022-03-18 04:13:02,871 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 961 transitions. Word has length 860 [2022-03-18 04:13:02,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:13:02,871 INFO L478 AbstractCegarLoop]: Abstraction has 866 states and 961 transitions. [2022-03-18 04:13:02,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 6.835051546391752) internal successors, (663), 96 states have internal predecessors, (663), 96 states have call successors, (98), 96 states have call predecessors, (98), 94 states have return successors, (96), 94 states have call predecessors, (96), 95 states have call successors, (96) [2022-03-18 04:13:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 961 transitions. [2022-03-18 04:13:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2022-03-18 04:13:02,878 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:13:02,879 INFO L500 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:13:02,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-18 04:13:03,089 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:13:03,089 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:13:03,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:13:03,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2015680598, now seen corresponding path program 187 times [2022-03-18 04:13:03,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:13:03,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [541631102] [2022-03-18 04:13:03,090 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:13:03,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2015680598, now seen corresponding path program 188 times [2022-03-18 04:13:03,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:13:03,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904202920] [2022-03-18 04:13:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:13:03,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:13:03,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:13:03,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116623623] [2022-03-18 04:13:03,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:13:03,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:13:03,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:13:03,103 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:13:03,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-18 04:13:03,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:13:03,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:13:03,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 2255 conjuncts, 193 conjunts are in the unsatisfiable core [2022-03-18 04:13:03,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:13:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 39719 backedges. 188 proven. 39527 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:13:07,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:13:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 39719 backedges. 188 proven. 22043 refuted. 0 times theorem prover too weak. 17488 trivial. 0 not checked. [2022-03-18 04:13:08,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:13:08,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904202920] [2022-03-18 04:13:08,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:13:08,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116623623] [2022-03-18 04:13:08,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116623623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:13:08,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:13:08,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 104 [2022-03-18 04:13:08,661 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:13:08,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [541631102] [2022-03-18 04:13:08,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [541631102] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:13:08,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:13:08,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-18 04:13:08,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491150542] [2022-03-18 04:13:08,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:13:08,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-18 04:13:08,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:13:08,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-18 04:13:08,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:13:08,663 INFO L87 Difference]: Start difference. First operand 866 states and 961 transitions. Second operand has 98 states, 98 states have (on average 6.836734693877551) internal successors, (670), 97 states have internal predecessors, (670), 97 states have call successors, (99), 97 states have call predecessors, (99), 95 states have return successors, (97), 95 states have call predecessors, (97), 96 states have call successors, (97) [2022-03-18 04:13:12,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:13:12,381 INFO L93 Difference]: Finished difference Result 880 states and 976 transitions. [2022-03-18 04:13:12,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-03-18 04:13:12,381 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 6.836734693877551) internal successors, (670), 97 states have internal predecessors, (670), 97 states have call successors, (99), 97 states have call predecessors, (99), 95 states have return successors, (97), 95 states have call predecessors, (97), 96 states have call successors, (97) Word has length 869 [2022-03-18 04:13:12,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:13:12,383 INFO L225 Difference]: With dead ends: 880 [2022-03-18 04:13:12,383 INFO L226 Difference]: Without dead ends: 875 [2022-03-18 04:13:12,385 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1831 GetRequests, 1634 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4569 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14838, Invalid=24168, Unknown=0, NotChecked=0, Total=39006 [2022-03-18 04:13:12,386 INFO L912 BasicCegarLoop]: 120 mSDtfsCounter, 388 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 04:13:12,386 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 852 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 04:13:12,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-03-18 04:13:12,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 875. [2022-03-18 04:13:12,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 677 states have (on average 1.1418020679468242) internal successors, (773), 677 states have internal predecessors, (773), 100 states have call successors, (100), 99 states have call predecessors, (100), 97 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2022-03-18 04:13:12,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 971 transitions. [2022-03-18 04:13:12,433 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 971 transitions. Word has length 869 [2022-03-18 04:13:12,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:13:12,447 INFO L478 AbstractCegarLoop]: Abstraction has 875 states and 971 transitions. [2022-03-18 04:13:12,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 6.836734693877551) internal successors, (670), 97 states have internal predecessors, (670), 97 states have call successors, (99), 97 states have call predecessors, (99), 95 states have return successors, (97), 95 states have call predecessors, (97), 96 states have call successors, (97) [2022-03-18 04:13:12,448 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 971 transitions. [2022-03-18 04:13:12,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2022-03-18 04:13:12,453 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:13:12,453 INFO L500 BasicCegarLoop]: trace histogram [96, 96, 95, 95, 95, 95, 95, 95, 95, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:13:12,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-18 04:13:12,653 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:13:12,654 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:13:12,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:13:12,654 INFO L85 PathProgramCache]: Analyzing trace with hash 187967452, now seen corresponding path program 189 times [2022-03-18 04:13:12,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:13:12,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [192734608] [2022-03-18 04:13:12,655 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:13:12,655 INFO L85 PathProgramCache]: Analyzing trace with hash 187967452, now seen corresponding path program 190 times [2022-03-18 04:13:12,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:13:12,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391909970] [2022-03-18 04:13:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:13:12,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:13:12,666 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:13:12,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802207310] [2022-03-18 04:13:12,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:13:12,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:13:12,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:13:12,668 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:13:12,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-18 04:13:12,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:13:12,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:13:12,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 2278 conjuncts, 195 conjunts are in the unsatisfiable core [2022-03-18 04:13:12,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:13:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 40569 backedges. 190 proven. 40375 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:13:16,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:13:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 40569 backedges. 190 proven. 22515 refuted. 0 times theorem prover too weak. 17864 trivial. 0 not checked. [2022-03-18 04:13:18,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:13:18,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391909970] [2022-03-18 04:13:18,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:13:18,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802207310] [2022-03-18 04:13:18,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802207310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:13:18,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:13:18,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 104 [2022-03-18 04:13:18,311 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:13:18,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [192734608] [2022-03-18 04:13:18,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [192734608] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:13:18,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:13:18,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-18 04:13:18,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086124410] [2022-03-18 04:13:18,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:13:18,312 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-18 04:13:18,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:13:18,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-18 04:13:18,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:13:18,313 INFO L87 Difference]: Start difference. First operand 875 states and 971 transitions. Second operand has 99 states, 99 states have (on average 6.838383838383838) internal successors, (677), 98 states have internal predecessors, (677), 98 states have call successors, (100), 98 states have call predecessors, (100), 96 states have return successors, (98), 96 states have call predecessors, (98), 97 states have call successors, (98) [2022-03-18 04:13:22,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:13:22,133 INFO L93 Difference]: Finished difference Result 889 states and 986 transitions. [2022-03-18 04:13:22,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2022-03-18 04:13:22,133 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 6.838383838383838) internal successors, (677), 98 states have internal predecessors, (677), 98 states have call successors, (100), 98 states have call predecessors, (100), 96 states have return successors, (98), 96 states have call predecessors, (98), 97 states have call successors, (98) Word has length 878 [2022-03-18 04:13:22,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:13:22,135 INFO L225 Difference]: With dead ends: 889 [2022-03-18 04:13:22,135 INFO L226 Difference]: Without dead ends: 884 [2022-03-18 04:13:22,137 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1850 GetRequests, 1652 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4663 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=14941, Invalid=24461, Unknown=0, NotChecked=0, Total=39402 [2022-03-18 04:13:22,137 INFO L912 BasicCegarLoop]: 121 mSDtfsCounter, 406 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 04:13:22,137 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 854 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 04:13:22,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-03-18 04:13:22,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 884. [2022-03-18 04:13:22,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 684 states have (on average 1.141812865497076) internal successors, (781), 684 states have internal predecessors, (781), 101 states have call successors, (101), 100 states have call predecessors, (101), 98 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-18 04:13:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 981 transitions. [2022-03-18 04:13:22,185 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 981 transitions. Word has length 878 [2022-03-18 04:13:22,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:13:22,185 INFO L478 AbstractCegarLoop]: Abstraction has 884 states and 981 transitions. [2022-03-18 04:13:22,186 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 6.838383838383838) internal successors, (677), 98 states have internal predecessors, (677), 98 states have call successors, (100), 98 states have call predecessors, (100), 96 states have return successors, (98), 96 states have call predecessors, (98), 97 states have call successors, (98) [2022-03-18 04:13:22,186 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 981 transitions. [2022-03-18 04:13:22,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 888 [2022-03-18 04:13:22,191 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:13:22,192 INFO L500 BasicCegarLoop]: trace histogram [97, 97, 96, 96, 96, 96, 96, 96, 96, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:13:22,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-18 04:13:22,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-18 04:13:22,393 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:13:22,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:13:22,394 INFO L85 PathProgramCache]: Analyzing trace with hash 22998806, now seen corresponding path program 191 times [2022-03-18 04:13:22,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:13:22,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1768116651] [2022-03-18 04:13:22,394 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:13:22,394 INFO L85 PathProgramCache]: Analyzing trace with hash 22998806, now seen corresponding path program 192 times [2022-03-18 04:13:22,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:13:22,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147354763] [2022-03-18 04:13:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:13:22,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:13:22,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:13:22,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949637440] [2022-03-18 04:13:22,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:13:22,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:13:22,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:13:22,410 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:13:22,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-18 04:13:23,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2022-03-18 04:13:23,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:13:23,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 2301 conjuncts, 197 conjunts are in the unsatisfiable core [2022-03-18 04:13:23,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:13:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 41428 backedges. 192 proven. 41232 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:13:27,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:13:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 41428 backedges. 192 proven. 22992 refuted. 0 times theorem prover too weak. 18244 trivial. 0 not checked. [2022-03-18 04:13:28,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:13:28,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147354763] [2022-03-18 04:13:28,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:13:28,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949637440] [2022-03-18 04:13:28,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949637440] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:13:28,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:13:28,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 104 [2022-03-18 04:13:28,849 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:13:28,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1768116651] [2022-03-18 04:13:28,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1768116651] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:13:28,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:13:28,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-18 04:13:28,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9785323] [2022-03-18 04:13:28,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:13:28,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-18 04:13:28,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:13:28,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-18 04:13:28,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:13:28,851 INFO L87 Difference]: Start difference. First operand 884 states and 981 transitions. Second operand has 100 states, 100 states have (on average 6.84) internal successors, (684), 99 states have internal predecessors, (684), 99 states have call successors, (101), 99 states have call predecessors, (101), 97 states have return successors, (99), 97 states have call predecessors, (99), 98 states have call successors, (99) [2022-03-18 04:13:32,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:13:32,795 INFO L93 Difference]: Finished difference Result 898 states and 996 transitions. [2022-03-18 04:13:32,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-03-18 04:13:32,796 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 6.84) internal successors, (684), 99 states have internal predecessors, (684), 99 states have call successors, (101), 99 states have call predecessors, (101), 97 states have return successors, (99), 97 states have call predecessors, (99), 98 states have call successors, (99) Word has length 887 [2022-03-18 04:13:32,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:13:32,798 INFO L225 Difference]: With dead ends: 898 [2022-03-18 04:13:32,798 INFO L226 Difference]: Without dead ends: 893 [2022-03-18 04:13:32,800 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1869 GetRequests, 1670 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4758 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15044, Invalid=24756, Unknown=0, NotChecked=0, Total=39800 [2022-03-18 04:13:32,800 INFO L912 BasicCegarLoop]: 122 mSDtfsCounter, 324 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 04:13:32,800 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 898 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 04:13:32,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-03-18 04:13:32,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2022-03-18 04:13:32,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 691 states have (on average 1.1418234442836468) internal successors, (789), 691 states have internal predecessors, (789), 102 states have call successors, (102), 101 states have call predecessors, (102), 99 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-03-18 04:13:32,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 991 transitions. [2022-03-18 04:13:32,864 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 991 transitions. Word has length 887 [2022-03-18 04:13:32,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:13:32,864 INFO L478 AbstractCegarLoop]: Abstraction has 893 states and 991 transitions. [2022-03-18 04:13:32,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 6.84) internal successors, (684), 99 states have internal predecessors, (684), 99 states have call successors, (101), 99 states have call predecessors, (101), 97 states have return successors, (99), 97 states have call predecessors, (99), 98 states have call successors, (99) [2022-03-18 04:13:32,865 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 991 transitions. [2022-03-18 04:13:32,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 897 [2022-03-18 04:13:32,870 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:13:32,871 INFO L500 BasicCegarLoop]: trace histogram [98, 98, 97, 97, 97, 97, 97, 97, 97, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:13:32,880 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-18 04:13:33,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:13:33,071 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:13:33,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:13:33,071 INFO L85 PathProgramCache]: Analyzing trace with hash -905467620, now seen corresponding path program 193 times [2022-03-18 04:13:33,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:13:33,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2051489687] [2022-03-18 04:13:33,072 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:13:33,072 INFO L85 PathProgramCache]: Analyzing trace with hash -905467620, now seen corresponding path program 194 times [2022-03-18 04:13:33,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:13:33,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648395481] [2022-03-18 04:13:33,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:13:33,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:13:33,084 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:13:33,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724796692] [2022-03-18 04:13:33,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:13:33,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:13:33,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:13:33,085 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:13:33,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-18 04:13:33,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:13:33,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:13:33,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 2324 conjuncts, 199 conjunts are in the unsatisfiable core [2022-03-18 04:13:33,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:13:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42296 backedges. 194 proven. 42098 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:13:37,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:13:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 42296 backedges. 194 proven. 23474 refuted. 0 times theorem prover too weak. 18628 trivial. 0 not checked. [2022-03-18 04:13:38,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:13:38,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648395481] [2022-03-18 04:13:38,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:13:38,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724796692] [2022-03-18 04:13:38,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724796692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:13:38,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:13:38,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 104 [2022-03-18 04:13:38,707 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:13:38,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2051489687] [2022-03-18 04:13:38,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2051489687] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:13:38,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:13:38,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-18 04:13:38,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607077997] [2022-03-18 04:13:38,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:13:38,708 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-18 04:13:38,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:13:38,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-18 04:13:38,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:13:38,710 INFO L87 Difference]: Start difference. First operand 893 states and 991 transitions. Second operand has 101 states, 101 states have (on average 6.841584158415841) internal successors, (691), 100 states have internal predecessors, (691), 100 states have call successors, (102), 100 states have call predecessors, (102), 98 states have return successors, (100), 98 states have call predecessors, (100), 99 states have call successors, (100) [2022-03-18 04:13:42,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:13:42,741 INFO L93 Difference]: Finished difference Result 907 states and 1006 transitions. [2022-03-18 04:13:42,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-03-18 04:13:42,741 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 6.841584158415841) internal successors, (691), 100 states have internal predecessors, (691), 100 states have call successors, (102), 100 states have call predecessors, (102), 98 states have return successors, (100), 98 states have call predecessors, (100), 99 states have call successors, (100) Word has length 896 [2022-03-18 04:13:42,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:13:42,743 INFO L225 Difference]: With dead ends: 907 [2022-03-18 04:13:42,743 INFO L226 Difference]: Without dead ends: 902 [2022-03-18 04:13:42,745 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1888 GetRequests, 1688 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4854 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=15147, Invalid=25053, Unknown=0, NotChecked=0, Total=40200 [2022-03-18 04:13:42,745 INFO L912 BasicCegarLoop]: 123 mSDtfsCounter, 423 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 04:13:42,745 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 870 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 04:13:42,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-03-18 04:13:42,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 902. [2022-03-18 04:13:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 698 states have (on average 1.1418338108882522) internal successors, (797), 698 states have internal predecessors, (797), 103 states have call successors, (103), 102 states have call predecessors, (103), 100 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2022-03-18 04:13:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1001 transitions. [2022-03-18 04:13:42,849 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1001 transitions. Word has length 896 [2022-03-18 04:13:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:13:42,849 INFO L478 AbstractCegarLoop]: Abstraction has 902 states and 1001 transitions. [2022-03-18 04:13:42,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 6.841584158415841) internal successors, (691), 100 states have internal predecessors, (691), 100 states have call successors, (102), 100 states have call predecessors, (102), 98 states have return successors, (100), 98 states have call predecessors, (100), 99 states have call successors, (100) [2022-03-18 04:13:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1001 transitions. [2022-03-18 04:13:42,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 906 [2022-03-18 04:13:42,857 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:13:42,857 INFO L500 BasicCegarLoop]: trace histogram [99, 99, 98, 98, 98, 98, 98, 98, 98, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:13:42,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-18 04:13:43,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:13:43,071 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:13:43,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:13:43,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1414059478, now seen corresponding path program 195 times [2022-03-18 04:13:43,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:13:43,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1013201847] [2022-03-18 04:13:43,072 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:13:43,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1414059478, now seen corresponding path program 196 times [2022-03-18 04:13:43,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:13:43,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061213571] [2022-03-18 04:13:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:13:43,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:13:43,084 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:13:43,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301640266] [2022-03-18 04:13:43,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 04:13:43,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:13:43,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:13:43,086 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:13:43,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-18 04:13:43,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 04:13:43,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:13:43,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 2347 conjuncts, 201 conjunts are in the unsatisfiable core [2022-03-18 04:13:43,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:13:47,462 INFO L134 CoverageAnalysis]: Checked inductivity of 43173 backedges. 196 proven. 42973 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:13:47,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:13:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 43173 backedges. 196 proven. 23961 refuted. 0 times theorem prover too weak. 19016 trivial. 0 not checked. [2022-03-18 04:13:48,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:13:48,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061213571] [2022-03-18 04:13:48,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:13:48,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301640266] [2022-03-18 04:13:48,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301640266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:13:48,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:13:48,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 104 [2022-03-18 04:13:48,825 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:13:48,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1013201847] [2022-03-18 04:13:48,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1013201847] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:13:48,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:13:48,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-18 04:13:48,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130008512] [2022-03-18 04:13:48,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:13:48,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-18 04:13:48,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:13:48,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-18 04:13:48,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-18 04:13:48,827 INFO L87 Difference]: Start difference. First operand 902 states and 1001 transitions. Second operand has 102 states, 102 states have (on average 6.8431372549019605) internal successors, (698), 101 states have internal predecessors, (698), 101 states have call successors, (103), 101 states have call predecessors, (103), 99 states have return successors, (101), 99 states have call predecessors, (101), 100 states have call successors, (101) [2022-03-18 04:13:52,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:13:52,956 INFO L93 Difference]: Finished difference Result 916 states and 1016 transitions. [2022-03-18 04:13:52,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2022-03-18 04:13:52,957 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 6.8431372549019605) internal successors, (698), 101 states have internal predecessors, (698), 101 states have call successors, (103), 101 states have call predecessors, (103), 99 states have return successors, (101), 99 states have call predecessors, (101), 100 states have call successors, (101) Word has length 905 [2022-03-18 04:13:52,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:13:52,959 INFO L225 Difference]: With dead ends: 916 [2022-03-18 04:13:52,959 INFO L226 Difference]: Without dead ends: 911 [2022-03-18 04:13:52,961 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1907 GetRequests, 1706 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=15250, Invalid=25352, Unknown=0, NotChecked=0, Total=40602 [2022-03-18 04:13:52,961 INFO L912 BasicCegarLoop]: 124 mSDtfsCounter, 546 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 04:13:52,961 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 878 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 04:13:52,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-03-18 04:13:53,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 911. [2022-03-18 04:13:53,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 705 states have (on average 1.1418439716312057) internal successors, (805), 705 states have internal predecessors, (805), 104 states have call successors, (104), 103 states have call predecessors, (104), 101 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2022-03-18 04:13:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1011 transitions. [2022-03-18 04:13:53,014 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1011 transitions. Word has length 905 [2022-03-18 04:13:53,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:13:53,014 INFO L478 AbstractCegarLoop]: Abstraction has 911 states and 1011 transitions. [2022-03-18 04:13:53,015 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 6.8431372549019605) internal successors, (698), 101 states have internal predecessors, (698), 101 states have call successors, (103), 101 states have call predecessors, (103), 99 states have return successors, (101), 99 states have call predecessors, (101), 100 states have call successors, (101) [2022-03-18 04:13:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1011 transitions. [2022-03-18 04:13:53,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 915 [2022-03-18 04:13:53,020 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:13:53,021 INFO L500 BasicCegarLoop]: trace histogram [100, 100, 99, 99, 99, 99, 99, 99, 99, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:13:53,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-18 04:13:53,221 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-18 04:13:53,221 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:13:53,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:13:53,221 INFO L85 PathProgramCache]: Analyzing trace with hash -537568676, now seen corresponding path program 197 times [2022-03-18 04:13:53,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:13:53,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [296327487] [2022-03-18 04:13:53,222 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:13:53,222 INFO L85 PathProgramCache]: Analyzing trace with hash -537568676, now seen corresponding path program 198 times [2022-03-18 04:13:53,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:13:53,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830574931] [2022-03-18 04:13:53,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:13:53,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:13:53,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:13:53,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046007707] [2022-03-18 04:13:53,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 04:13:53,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:13:53,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:13:53,235 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:13:53,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-18 04:13:54,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 100 check-sat command(s) [2022-03-18 04:13:54,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 04:13:54,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 2370 conjuncts, 203 conjunts are in the unsatisfiable core [2022-03-18 04:13:54,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 04:13:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 44059 backedges. 198 proven. 43857 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 04:13:58,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 04:13:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 44059 backedges. 198 proven. 24453 refuted. 0 times theorem prover too weak. 19408 trivial. 0 not checked. [2022-03-18 04:13:59,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 04:13:59,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830574931] [2022-03-18 04:13:59,752 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 04:13:59,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046007707] [2022-03-18 04:13:59,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046007707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 04:13:59,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 04:13:59,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2022-03-18 04:13:59,752 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 04:13:59,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [296327487] [2022-03-18 04:13:59,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [296327487] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 04:13:59,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 04:13:59,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-03-18 04:13:59,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186757638] [2022-03-18 04:13:59,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 04:13:59,753 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-18 04:13:59,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 04:13:59,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-18 04:13:59,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-18 04:13:59,754 INFO L87 Difference]: Start difference. First operand 911 states and 1011 transitions. Second operand has 103 states, 103 states have (on average 6.844660194174757) internal successors, (705), 102 states have internal predecessors, (705), 102 states have call successors, (104), 102 states have call predecessors, (104), 100 states have return successors, (102), 100 states have call predecessors, (102), 101 states have call successors, (102) [2022-03-18 04:14:03,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 04:14:03,967 INFO L93 Difference]: Finished difference Result 925 states and 1026 transitions. [2022-03-18 04:14:03,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-03-18 04:14:03,967 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 6.844660194174757) internal successors, (705), 102 states have internal predecessors, (705), 102 states have call successors, (104), 102 states have call predecessors, (104), 100 states have return successors, (102), 100 states have call predecessors, (102), 101 states have call successors, (102) Word has length 914 [2022-03-18 04:14:03,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 04:14:03,969 INFO L225 Difference]: With dead ends: 925 [2022-03-18 04:14:03,969 INFO L226 Difference]: Without dead ends: 920 [2022-03-18 04:14:03,971 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1926 GetRequests, 1725 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=15251, Invalid=25351, Unknown=0, NotChecked=0, Total=40602 [2022-03-18 04:14:03,971 INFO L912 BasicCegarLoop]: 125 mSDtfsCounter, 471 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 04:14:03,971 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 874 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 04:14:03,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-03-18 04:14:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 920. [2022-03-18 04:14:04,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 712 states have (on average 1.1418539325842696) internal successors, (813), 712 states have internal predecessors, (813), 105 states have call successors, (105), 104 states have call predecessors, (105), 102 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-18 04:14:04,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1021 transitions. [2022-03-18 04:14:04,024 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1021 transitions. Word has length 914 [2022-03-18 04:14:04,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 04:14:04,025 INFO L478 AbstractCegarLoop]: Abstraction has 920 states and 1021 transitions. [2022-03-18 04:14:04,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 6.844660194174757) internal successors, (705), 102 states have internal predecessors, (705), 102 states have call successors, (104), 102 states have call predecessors, (104), 100 states have return successors, (102), 100 states have call predecessors, (102), 101 states have call successors, (102) [2022-03-18 04:14:04,025 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1021 transitions. [2022-03-18 04:14:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 924 [2022-03-18 04:14:04,032 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 04:14:04,032 INFO L500 BasicCegarLoop]: trace histogram [101, 101, 100, 100, 100, 100, 100, 100, 100, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 04:14:04,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-18 04:14:04,232 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-18 04:14:04,232 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 04:14:04,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 04:14:04,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1921944726, now seen corresponding path program 199 times [2022-03-18 04:14:04,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 04:14:04,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1117692767] [2022-03-18 04:14:04,233 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 04:14:04,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1921944726, now seen corresponding path program 200 times [2022-03-18 04:14:04,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 04:14:04,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977824630] [2022-03-18 04:14:04,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 04:14:04,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 04:14:04,245 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 04:14:04,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19952740] [2022-03-18 04:14:04,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 04:14:04,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 04:14:04,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 04:14:04,247 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 04:14:04,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-18 04:14:04,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 04:14:04,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-18 04:14:04,557 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-18 04:14:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-18 04:14:05,089 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-18 04:14:05,089 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-18 04:14:05,089 INFO L614 BasicCegarLoop]: Counterexample is feasible [2022-03-18 04:14:05,096 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 04:14:05,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-18 04:14:05,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-18 04:14:05,306 INFO L718 BasicCegarLoop]: Path program histogram: [200, 2, 2, 2, 2] [2022-03-18 04:14:05,309 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 04:14:05,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 04:14:05 BoogieIcfgContainer [2022-03-18 04:14:05,378 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 04:14:05,378 INFO L158 Benchmark]: Toolchain (without parser) took 531944.96ms. Allocated memory was 191.9MB in the beginning and 405.8MB in the end (delta: 213.9MB). Free memory was 142.7MB in the beginning and 307.5MB in the end (delta: -164.8MB). Peak memory consumption was 258.8MB. Max. memory is 8.0GB. [2022-03-18 04:14:05,378 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 191.9MB. Free memory was 158.7MB in the beginning and 158.7MB in the end (delta: 69.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 04:14:05,378 INFO L158 Benchmark]: CACSL2BoogieTranslator took 268.53ms. Allocated memory is still 191.9MB. Free memory was 142.5MB in the beginning and 167.9MB in the end (delta: -25.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 04:14:05,379 INFO L158 Benchmark]: Boogie Preprocessor took 38.91ms. Allocated memory is still 191.9MB. Free memory was 167.9MB in the beginning and 166.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 04:14:05,379 INFO L158 Benchmark]: RCFGBuilder took 306.50ms. Allocated memory is still 191.9MB. Free memory was 166.5MB in the beginning and 156.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 04:14:05,379 INFO L158 Benchmark]: TraceAbstraction took 531325.49ms. Allocated memory was 191.9MB in the beginning and 405.8MB in the end (delta: 213.9MB). Free memory was 155.5MB in the beginning and 307.5MB in the end (delta: -152.0MB). Peak memory consumption was 271.4MB. Max. memory is 8.0GB. [2022-03-18 04:14:05,379 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 191.9MB. Free memory was 158.7MB in the beginning and 158.7MB in the end (delta: 69.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 268.53ms. Allocated memory is still 191.9MB. Free memory was 142.5MB in the beginning and 167.9MB in the end (delta: -25.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.91ms. Allocated memory is still 191.9MB. Free memory was 167.9MB in the beginning and 166.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 306.50ms. Allocated memory is still 191.9MB. Free memory was 166.5MB in the beginning and 156.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 531325.49ms. Allocated memory was 191.9MB in the beginning and 405.8MB in the end (delta: 213.9MB). Free memory was 155.5MB in the beginning and 307.5MB in the end (delta: -152.0MB). Peak memory consumption was 271.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) [L13] COND FALSE !(!cond) [L29] RET assume_abort_if_not(x1 >= 0) [L30] CALL assume_abort_if_not(x2 != 0) [L13] COND FALSE !(!cond) [L30] RET assume_abort_if_not(x2 != 0) [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND FALSE !(counter++<100) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) [L16] COND TRUE !(cond) [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 531.2s, OverallIterations: 104, TraceHistogramMax: 101, PathProgramHistogramMax: 200, EmptinessCheckTime: 0.3s, AutomataDifference: 150.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 20220 SdHoareTripleChecker+Valid, 23.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 20217 mSDsluCounter, 48453 SdHoareTripleChecker+Invalid, 19.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 40827 mSDsCounter, 2783 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 35180 IncrementalHoareTripleChecker+Invalid, 37963 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2783 mSolverCounterUnsat, 7626 mSDtfsCounter, 35180 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 98620 GetRequests, 85856 SyntacticMatches, 51 SemanticMatches, 12713 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175334 ImplicationChecksByTransitivity, 306.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=920occurred in iteration=103, InterpolantAutomatonStates: 10316, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.3s AutomataMinimizationTime, 103 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-18 04:14:05,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...