/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 15:27:06,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 15:27:06,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 15:27:06,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 15:27:06,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 15:27:06,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 15:27:06,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 15:27:06,170 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 15:27:06,176 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 15:27:06,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 15:27:06,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 15:27:06,177 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 15:27:06,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 15:27:06,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 15:27:06,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 15:27:06,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 15:27:06,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 15:27:06,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 15:27:06,178 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 15:27:06,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 15:27:06,178 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 15:27:06,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 15:27:06,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 15:27:06,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 15:27:06,179 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 15:27:06,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 15:27:06,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:27:06,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 15:27:06,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 15:27:06,179 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 15:27:06,179 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 15:27:06,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 15:27:06,180 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 15:27:06,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 15:27:06,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 15:27:06,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 15:27:06,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 15:27:06,383 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 15:27:06,384 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 15:27:06,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2022-03-20 15:27:06,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a00cf8cf/cbf38ad9db284d8b9e8ceb55441a86ae/FLAG8bfa5fd9d [2022-03-20 15:27:06,719 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 15:27:06,720 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2022-03-20 15:27:06,723 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a00cf8cf/cbf38ad9db284d8b9e8ceb55441a86ae/FLAG8bfa5fd9d [2022-03-20 15:27:07,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a00cf8cf/cbf38ad9db284d8b9e8ceb55441a86ae [2022-03-20 15:27:07,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 15:27:07,169 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 15:27:07,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 15:27:07,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 15:27:07,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 15:27:07,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:27:07" (1/1) ... [2022-03-20 15:27:07,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ca3c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:07, skipping insertion in model container [2022-03-20 15:27:07,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:27:07" (1/1) ... [2022-03-20 15:27:07,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 15:27:07,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 15:27:07,329 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/hard-ll_valuebound10.c[538,551] [2022-03-20 15:27:07,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:27:07,356 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 15:27:07,365 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/hard-ll_valuebound10.c[538,551] [2022-03-20 15:27:07,381 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:27:07,390 INFO L208 MainTranslator]: Completed translation [2022-03-20 15:27:07,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:07 WrapperNode [2022-03-20 15:27:07,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 15:27:07,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 15:27:07,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 15:27:07,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 15:27:07,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:07" (1/1) ... [2022-03-20 15:27:07,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:07" (1/1) ... [2022-03-20 15:27:07,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:07" (1/1) ... [2022-03-20 15:27:07,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:07" (1/1) ... [2022-03-20 15:27:07,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:07" (1/1) ... [2022-03-20 15:27:07,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:07" (1/1) ... [2022-03-20 15:27:07,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:07" (1/1) ... [2022-03-20 15:27:07,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 15:27:07,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 15:27:07,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 15:27:07,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 15:27:07,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:07" (1/1) ... [2022-03-20 15:27:07,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:27:07,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:07,456 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) [2022-03-20 15:27:07,462 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 [2022-03-20 15:27:07,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 15:27:07,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 15:27:07,488 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 15:27:07,488 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 15:27:07,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 15:27:07,488 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 15:27:07,488 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 15:27:07,489 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 15:27:07,489 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 15:27:07,489 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 15:27:07,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 15:27:07,490 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 15:27:07,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 15:27:07,490 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 15:27:07,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 15:27:07,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 15:27:07,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 15:27:07,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 15:27:07,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 15:27:07,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 15:27:07,536 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 15:27:07,537 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 15:27:07,682 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 15:27:07,686 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 15:27:07,687 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 15:27:07,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:27:07 BoogieIcfgContainer [2022-03-20 15:27:07,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 15:27:07,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 15:27:07,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 15:27:07,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 15:27:07,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:27:07" (1/3) ... [2022-03-20 15:27:07,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2584ee25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:27:07, skipping insertion in model container [2022-03-20 15:27:07,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:27:07" (2/3) ... [2022-03-20 15:27:07,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2584ee25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:27:07, skipping insertion in model container [2022-03-20 15:27:07,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:27:07" (3/3) ... [2022-03-20 15:27:07,693 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound10.c [2022-03-20 15:27:07,696 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 15:27:07,696 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 15:27:07,738 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 15:27:07,742 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 [2022-03-20 15:27:07,742 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 15:27:07,750 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 15:27:07,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 15:27:07,756 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:07,756 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:07,756 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:07,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:07,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-03-20 15:27:07,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:07,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1620921881] [2022-03-20 15:27:07,772 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:07,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 2 times [2022-03-20 15:27:07,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:07,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279011699] [2022-03-20 15:27:07,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:07,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:07,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 15:27:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:07,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 15:27:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:07,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 15:27:07,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:07,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 15:27:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 15:27:07,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:07,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279011699] [2022-03-20 15:27:07,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279011699] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:07,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:07,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 15:27:07,965 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:07,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1620921881] [2022-03-20 15:27:07,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1620921881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:07,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:07,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 15:27:07,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851990536] [2022-03-20 15:27:07,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:07,972 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 15:27:07,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:07,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 15:27:07,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 15:27:07,993 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 15:27:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:08,075 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-03-20 15:27:08,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 15:27:08,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 15:27:08,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:08,087 INFO L225 Difference]: With dead ends: 69 [2022-03-20 15:27:08,087 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 15:27:08,090 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 15:27:08,095 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:08,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:27:08,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 15:27:08,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 15:27:08,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 15:27:08,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-20 15:27:08,132 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-20 15:27:08,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:08,132 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-20 15:27:08,133 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 15:27:08,133 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-20 15:27:08,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 15:27:08,135 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:08,135 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:08,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 15:27:08,136 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:08,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:08,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-03-20 15:27:08,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:08,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [758026656] [2022-03-20 15:27:08,137 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:08,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 2 times [2022-03-20 15:27:08,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:08,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487463046] [2022-03-20 15:27:08,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:08,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:08,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 15:27:08,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:08,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 15:27:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:08,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 15:27:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:08,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 15:27:08,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 15:27:08,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:08,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487463046] [2022-03-20 15:27:08,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487463046] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:08,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:08,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:27:08,262 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:08,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [758026656] [2022-03-20 15:27:08,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [758026656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:08,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:08,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:27:08,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228789599] [2022-03-20 15:27:08,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:08,264 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:27:08,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:08,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:27:08,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:27:08,265 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 15:27:08,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:08,404 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-20 15:27:08,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 15:27:08,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-20 15:27:08,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:08,406 INFO L225 Difference]: With dead ends: 46 [2022-03-20 15:27:08,406 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 15:27:08,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:27:08,408 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:08,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:27:08,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 15:27:08,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-20 15:27:08,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 15:27:08,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-20 15:27:08,422 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-20 15:27:08,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:08,423 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-20 15:27:08,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 15:27:08,423 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-20 15:27:08,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 15:27:08,424 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:08,424 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:08,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 15:27:08,424 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:08,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:08,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-03-20 15:27:08,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:08,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [636267557] [2022-03-20 15:27:08,425 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:08,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 2 times [2022-03-20 15:27:08,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:08,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339997895] [2022-03-20 15:27:08,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:08,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:08,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 15:27:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:08,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 15:27:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:08,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 15:27:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:08,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 15:27:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:08,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 15:27:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 15:27:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 15:27:08,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:08,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339997895] [2022-03-20 15:27:08,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339997895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:08,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:08,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:27:08,546 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:08,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [636267557] [2022-03-20 15:27:08,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [636267557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:08,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:08,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:27:08,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933331946] [2022-03-20 15:27:08,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:08,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:27:08,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:08,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:27:08,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:27:08,548 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:27:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:08,704 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-20 15:27:08,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 15:27:08,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 15:27:08,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:08,707 INFO L225 Difference]: With dead ends: 50 [2022-03-20 15:27:08,707 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 15:27:08,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:27:08,710 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:08,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:27:08,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 15:27:08,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-20 15:27:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 15:27:08,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-20 15:27:08,729 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-20 15:27:08,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:08,729 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-20 15:27:08,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 15:27:08,730 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-20 15:27:08,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 15:27:08,730 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:08,730 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:08,730 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 15:27:08,731 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:08,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:08,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-03-20 15:27:08,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:08,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [844862015] [2022-03-20 15:27:08,731 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:08,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 2 times [2022-03-20 15:27:08,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:08,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540430748] [2022-03-20 15:27:08,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:08,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:08,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:08,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243158216] [2022-03-20 15:27:08,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:08,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:08,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:08,751 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) [2022-03-20 15:27:08,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 15:27:08,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:08,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:08,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 15:27:08,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 15:27:08,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:27:08,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:08,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540430748] [2022-03-20 15:27:08,939 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:08,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243158216] [2022-03-20 15:27:08,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243158216] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:08,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:08,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:27:08,940 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:08,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [844862015] [2022-03-20 15:27:08,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [844862015] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:08,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:08,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:27:08,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460896938] [2022-03-20 15:27:08,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:08,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:27:08,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:08,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:27:08,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:27:08,941 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 15:27:08,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:08,998 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-03-20 15:27:08,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:27:08,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-20 15:27:08,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:09,000 INFO L225 Difference]: With dead ends: 69 [2022-03-20 15:27:09,000 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 15:27:09,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:27:09,001 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:09,001 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 157 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:27:09,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 15:27:09,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 15:27:09,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 15:27:09,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-20 15:27:09,009 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-03-20 15:27:09,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:09,010 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-20 15:27:09,010 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 15:27:09,010 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-20 15:27:09,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 15:27:09,011 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:09,011 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:09,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 15:27:09,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:09,220 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:09,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:09,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-03-20 15:27:09,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:09,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1929768112] [2022-03-20 15:27:09,221 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:09,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 2 times [2022-03-20 15:27:09,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:09,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691813607] [2022-03-20 15:27:09,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:09,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:09,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:09,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386742898] [2022-03-20 15:27:09,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:09,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:09,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:09,236 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) [2022-03-20 15:27:09,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 15:27:09,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:09,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:09,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 15:27:09,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 15:27:09,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:27:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 15:27:09,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:09,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691813607] [2022-03-20 15:27:09,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:09,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386742898] [2022-03-20 15:27:09,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386742898] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 15:27:09,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:27:09,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-20 15:27:09,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:09,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1929768112] [2022-03-20 15:27:09,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1929768112] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:09,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:09,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:27:09,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700805125] [2022-03-20 15:27:09,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:09,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:27:09,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:09,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:27:09,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 15:27:09,675 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 15:27:09,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:09,729 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-03-20 15:27:09,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:27:09,730 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-03-20 15:27:09,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:09,733 INFO L225 Difference]: With dead ends: 68 [2022-03-20 15:27:09,733 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 15:27:09,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:27:09,737 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:09,737 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:27:09,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 15:27:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-20 15:27:09,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 15:27:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-03-20 15:27:09,756 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-03-20 15:27:09,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:09,757 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-03-20 15:27:09,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 15:27:09,757 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-03-20 15:27:09,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 15:27:09,762 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:09,762 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:09,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 15:27:09,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:09,977 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:09,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:09,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-03-20 15:27:09,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:09,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1644698558] [2022-03-20 15:27:09,978 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:09,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 2 times [2022-03-20 15:27:09,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:09,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142733764] [2022-03-20 15:27:09,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:09,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:09,987 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:09,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250722586] [2022-03-20 15:27:09,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:09,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:09,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:09,989 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) [2022-03-20 15:27:09,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 15:27:10,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:10,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:10,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 15:27:10,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 15:27:10,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:27:10,332 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-20 15:27:10,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:10,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142733764] [2022-03-20 15:27:10,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:10,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250722586] [2022-03-20 15:27:10,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250722586] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 15:27:10,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:27:10,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 15:27:10,333 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:10,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1644698558] [2022-03-20 15:27:10,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1644698558] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:10,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:10,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:27:10,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986972075] [2022-03-20 15:27:10,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:10,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:27:10,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:10,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:27:10,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:27:10,335 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 15:27:10,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:10,391 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-03-20 15:27:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:27:10,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-03-20 15:27:10,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:10,393 INFO L225 Difference]: With dead ends: 76 [2022-03-20 15:27:10,393 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 15:27:10,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 15:27:10,393 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:10,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:27:10,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 15:27:10,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-03-20 15:27:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 15:27:10,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-03-20 15:27:10,403 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-03-20 15:27:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:10,403 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-03-20 15:27:10,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 15:27:10,403 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-03-20 15:27:10,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 15:27:10,404 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:10,404 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:10,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 15:27:10,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:10,621 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:10,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:10,621 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-03-20 15:27:10,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:10,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1853333962] [2022-03-20 15:27:10,622 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:10,622 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 2 times [2022-03-20 15:27:10,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:10,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443543585] [2022-03-20 15:27:10,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:10,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:10,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:10,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507531190] [2022-03-20 15:27:10,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:10,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:10,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:10,639 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) [2022-03-20 15:27:10,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 15:27:10,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:10,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:10,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 15:27:10,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 15:27:10,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:27:10,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:10,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443543585] [2022-03-20 15:27:10,777 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:10,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507531190] [2022-03-20 15:27:10,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507531190] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:10,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:10,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:27:10,778 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:10,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1853333962] [2022-03-20 15:27:10,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1853333962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:10,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:10,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:27:10,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263222843] [2022-03-20 15:27:10,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:10,779 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:27:10,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:10,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:27:10,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:27:10,779 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 15:27:10,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:10,824 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-03-20 15:27:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:27:10,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-20 15:27:10,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:10,828 INFO L225 Difference]: With dead ends: 79 [2022-03-20 15:27:10,828 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 15:27:10,828 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:27:10,829 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:10,829 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:27:10,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 15:27:10,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-20 15:27:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 15:27:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-03-20 15:27:10,844 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-03-20 15:27:10,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:10,844 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-03-20 15:27:10,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 15:27:10,844 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-03-20 15:27:10,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 15:27:10,845 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:10,846 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:10,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 15:27:11,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:11,059 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:11,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:11,060 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2022-03-20 15:27:11,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:11,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2047949497] [2022-03-20 15:27:11,060 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:11,061 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 2 times [2022-03-20 15:27:11,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:11,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380505707] [2022-03-20 15:27:11,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:11,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:11,068 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:11,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237469470] [2022-03-20 15:27:11,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:11,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:11,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:11,070 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) [2022-03-20 15:27:11,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 15:27:11,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:11,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:11,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 15:27:11,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:11,683 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-20 15:27:11,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:27:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-20 15:27:13,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:13,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380505707] [2022-03-20 15:27:13,600 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:13,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237469470] [2022-03-20 15:27:13,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237469470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:27:13,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:27:13,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 15:27:13,601 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:13,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2047949497] [2022-03-20 15:27:13,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2047949497] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:13,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:13,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 15:27:13,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883468555] [2022-03-20 15:27:13,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:13,602 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 15:27:13,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:13,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 15:27:13,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:27:13,602 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 15:27:13,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:13,784 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2022-03-20 15:27:13,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 15:27:13,784 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2022-03-20 15:27:13,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:13,786 INFO L225 Difference]: With dead ends: 135 [2022-03-20 15:27:13,786 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 15:27:13,787 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-20 15:27:13,788 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:13,789 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 326 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:27:13,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 15:27:13,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-03-20 15:27:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.140625) internal successors, (73), 67 states have internal predecessors, (73), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 15:27:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2022-03-20 15:27:13,806 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 75 [2022-03-20 15:27:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:13,807 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2022-03-20 15:27:13,807 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 15:27:13,807 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2022-03-20 15:27:13,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 15:27:13,807 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:13,807 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:13,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 15:27:14,024 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:14,025 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:14,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:14,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 3 times [2022-03-20 15:27:14,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:14,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [417850945] [2022-03-20 15:27:14,026 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:14,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 4 times [2022-03-20 15:27:14,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:14,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552468125] [2022-03-20 15:27:14,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:14,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:14,033 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:14,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [15012759] [2022-03-20 15:27:14,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:27:14,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:14,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:14,035 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) [2022-03-20 15:27:14,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 15:27:14,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:27:14,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:14,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 15:27:14,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-20 15:27:14,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:27:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-20 15:27:16,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:16,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552468125] [2022-03-20 15:27:16,007 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:16,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15012759] [2022-03-20 15:27:16,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15012759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:27:16,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:27:16,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-03-20 15:27:16,008 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:16,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [417850945] [2022-03-20 15:27:16,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [417850945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:16,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:16,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:27:16,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946490411] [2022-03-20 15:27:16,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:16,009 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:27:16,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:16,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:27:16,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:27:16,009 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 15:27:16,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:16,128 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2022-03-20 15:27:16,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 15:27:16,128 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2022-03-20 15:27:16,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:16,129 INFO L225 Difference]: With dead ends: 133 [2022-03-20 15:27:16,129 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 15:27:16,129 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:27:16,130 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:16,130 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 265 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:27:16,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 15:27:16,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-20 15:27:16,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.106060606060606) internal successors, (73), 70 states have internal predecessors, (73), 28 states have call successors, (28), 16 states have call predecessors, (28), 15 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 15:27:16,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2022-03-20 15:27:16,140 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 80 [2022-03-20 15:27:16,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:16,140 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2022-03-20 15:27:16,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-20 15:27:16,140 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2022-03-20 15:27:16,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 15:27:16,141 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:16,141 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:16,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 15:27:16,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:16,355 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:16,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:16,356 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2022-03-20 15:27:16,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:16,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [855575988] [2022-03-20 15:27:16,356 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:16,356 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 2 times [2022-03-20 15:27:16,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:16,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991185335] [2022-03-20 15:27:16,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:16,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:16,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:16,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920328966] [2022-03-20 15:27:16,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:27:16,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:16,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:16,369 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) [2022-03-20 15:27:16,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 15:27:16,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:27:16,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:16,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 15:27:16,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:17,289 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 15:27:17,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:27:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-20 15:27:31,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:27:31,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991185335] [2022-03-20 15:27:31,777 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:27:31,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920328966] [2022-03-20 15:27:31,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920328966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:27:31,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:27:31,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-03-20 15:27:31,779 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:27:31,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [855575988] [2022-03-20 15:27:31,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [855575988] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:27:31,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:27:31,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 15:27:31,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266922454] [2022-03-20 15:27:31,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:27:31,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 15:27:31,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:31,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 15:27:31,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-20 15:27:31,782 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 15:27:32,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:27:32,842 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2022-03-20 15:27:32,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 15:27:32,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2022-03-20 15:27:32,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:27:32,844 INFO L225 Difference]: With dead ends: 116 [2022-03-20 15:27:32,844 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 15:27:32,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-03-20 15:27:32,845 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 15:27:32,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 342 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 15:27:32,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 15:27:32,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-20 15:27:32,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 15:27:32,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2022-03-20 15:27:32,851 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 86 [2022-03-20 15:27:32,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:27:32,852 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2022-03-20 15:27:32,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-20 15:27:32,852 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2022-03-20 15:27:32,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 15:27:32,852 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:27:32,852 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:27:32,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 15:27:33,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:33,060 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:27:33,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:27:33,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 5 times [2022-03-20 15:27:33,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:27:33,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1108219163] [2022-03-20 15:27:33,060 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:27:33,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 6 times [2022-03-20 15:27:33,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:27:33,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830554646] [2022-03-20 15:27:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:27:33,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:27:33,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:27:33,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371894520] [2022-03-20 15:27:33,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:27:33,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:27:33,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:27:33,071 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) [2022-03-20 15:27:33,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 15:27:33,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 15:27:33,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:27:33,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-20 15:27:33,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:27:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-20 15:27:47,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:28:30,863 WARN L232 SmtUtils]: Spent 24.84s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 15:29:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-20 15:29:28,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:29:28,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830554646] [2022-03-20 15:29:28,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:29:28,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371894520] [2022-03-20 15:29:28,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371894520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:29:28,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:29:28,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2022-03-20 15:29:28,743 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:29:28,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1108219163] [2022-03-20 15:29:28,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1108219163] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:29:28,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:29:28,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:29:28,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021697683] [2022-03-20 15:29:28,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:29:28,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:29:28,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:29:28,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:29:28,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=163, Unknown=1, NotChecked=0, Total=210 [2022-03-20 15:29:28,744 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 15:29:30,774 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:29:32,472 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:29:32,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:29:32,896 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-03-20 15:29:32,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 15:29:32,897 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2022-03-20 15:29:32,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:29:32,897 INFO L225 Difference]: With dead ends: 112 [2022-03-20 15:29:32,897 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 15:29:32,898 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2022-03-20 15:29:32,898 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:29:32,898 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 258 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 211 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2022-03-20 15:29:32,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 15:29:32,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-03-20 15:29:32,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.11864406779661) internal successors, (66), 63 states have internal predecessors, (66), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 15:29:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2022-03-20 15:29:32,906 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 92 [2022-03-20 15:29:32,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:29:32,906 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2022-03-20 15:29:32,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-20 15:29:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2022-03-20 15:29:32,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 15:29:32,906 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:29:32,907 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:29:32,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 15:29:33,113 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,SelfDestructingSolverStorable10 [2022-03-20 15:29:33,113 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:29:33,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:29:33,113 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 7 times [2022-03-20 15:29:33,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:29:33,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1830355413] [2022-03-20 15:29:33,114 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:29:33,114 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 8 times [2022-03-20 15:29:33,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:29:33,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574870193] [2022-03-20 15:29:33,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:29:33,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:29:33,120 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:29:33,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055081039] [2022-03-20 15:29:33,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:29:33,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:29:33,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:29:33,122 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) [2022-03-20 15:29:33,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 15:29:33,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:29:33,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:29:33,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 15:29:33,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:29:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-20 15:29:33,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:29:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-20 15:29:35,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:29:35,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574870193] [2022-03-20 15:29:35,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:29:35,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055081039] [2022-03-20 15:29:35,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055081039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:29:35,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:29:35,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 15:29:35,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:29:35,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1830355413] [2022-03-20 15:29:35,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1830355413] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:29:35,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:29:35,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 15:29:35,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132611230] [2022-03-20 15:29:35,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:29:35,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 15:29:35,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:29:35,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 15:29:35,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:29:35,770 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 15:29:36,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:29:36,011 INFO L93 Difference]: Finished difference Result 177 states and 223 transitions. [2022-03-20 15:29:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 15:29:36,011 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2022-03-20 15:29:36,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:29:36,012 INFO L225 Difference]: With dead ends: 177 [2022-03-20 15:29:36,012 INFO L226 Difference]: Without dead ends: 138 [2022-03-20 15:29:36,013 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-20 15:29:36,013 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:29:36,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 400 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:29:36,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-20 15:29:36,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-03-20 15:29:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 88 states have internal predecessors, (92), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 15:29:36,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 167 transitions. [2022-03-20 15:29:36,028 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 167 transitions. Word has length 97 [2022-03-20 15:29:36,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:29:36,028 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 167 transitions. [2022-03-20 15:29:36,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-20 15:29:36,028 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 167 transitions. [2022-03-20 15:29:36,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 15:29:36,029 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:29:36,029 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:29:36,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 15:29:36,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:29:36,232 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:29:36,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:29:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 9 times [2022-03-20 15:29:36,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:29:36,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [316604039] [2022-03-20 15:29:36,232 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:29:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 10 times [2022-03-20 15:29:36,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:29:36,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165034510] [2022-03-20 15:29:36,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:29:36,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:29:36,239 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:29:36,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583864048] [2022-03-20 15:29:36,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:29:36,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:29:36,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:29:36,240 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) [2022-03-20 15:29:36,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 15:29:36,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:29:36,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:29:36,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 15:29:36,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:29:37,456 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 58 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 15:29:37,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:30:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 58 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-20 15:30:22,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:30:22,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165034510] [2022-03-20 15:30:22,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:30:22,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583864048] [2022-03-20 15:30:22,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583864048] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:30:22,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:30:22,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-20 15:30:22,805 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:30:22,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [316604039] [2022-03-20 15:30:22,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [316604039] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:30:22,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:30:22,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 15:30:22,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213605592] [2022-03-20 15:30:22,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:30:22,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 15:30:22,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:30:22,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 15:30:22,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-03-20 15:30:22,806 INFO L87 Difference]: Start difference. First operand 138 states and 167 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 15:30:24,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:30:24,136 INFO L93 Difference]: Finished difference Result 184 states and 208 transitions. [2022-03-20 15:30:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 15:30:24,136 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 105 [2022-03-20 15:30:24,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:30:24,137 INFO L225 Difference]: With dead ends: 184 [2022-03-20 15:30:24,137 INFO L226 Difference]: Without dead ends: 147 [2022-03-20 15:30:24,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-03-20 15:30:24,138 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 17 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 15:30:24,139 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 511 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 15:30:24,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-20 15:30:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-03-20 15:30:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 95 states have internal predecessors, (98), 36 states have call successors, (36), 21 states have call predecessors, (36), 20 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 15:30:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 167 transitions. [2022-03-20 15:30:24,152 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 167 transitions. Word has length 105 [2022-03-20 15:30:24,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:30:24,152 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 167 transitions. [2022-03-20 15:30:24,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-20 15:30:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 167 transitions. [2022-03-20 15:30:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 15:30:24,154 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:30:24,154 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:30:24,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 15:30:24,359 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,SelfDestructingSolverStorable12 [2022-03-20 15:30:24,359 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:30:24,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:30:24,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 11 times [2022-03-20 15:30:24,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:30:24,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [973217216] [2022-03-20 15:30:24,360 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:30:24,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 12 times [2022-03-20 15:30:24,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:30:24,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476529166] [2022-03-20 15:30:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:30:24,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:30:24,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:30:24,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574805955] [2022-03-20 15:30:24,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:30:24,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:30:24,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:30:24,367 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) [2022-03-20 15:30:24,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 15:30:24,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-20 15:30:24,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:30:24,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-20 15:30:24,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:30:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 96 proven. 4 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2022-03-20 15:30:24,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:30:25,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:30:25,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476529166] [2022-03-20 15:30:25,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:30:25,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574805955] [2022-03-20 15:30:25,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574805955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:30:25,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:30:25,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 15:30:25,124 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:30:25,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [973217216] [2022-03-20 15:30:25,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [973217216] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:30:25,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:30:25,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:30:25,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230410419] [2022-03-20 15:30:25,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:30:25,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:30:25,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:30:25,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:30:25,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-03-20 15:30:25,125 INFO L87 Difference]: Start difference. First operand 147 states and 167 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 15:30:25,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:30:25,448 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2022-03-20 15:30:25,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 15:30:25,448 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 114 [2022-03-20 15:30:25,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:30:25,451 INFO L225 Difference]: With dead ends: 168 [2022-03-20 15:30:25,451 INFO L226 Difference]: Without dead ends: 156 [2022-03-20 15:30:25,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:30:25,451 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 20 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:30:25,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 288 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 215 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-03-20 15:30:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-20 15:30:25,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2022-03-20 15:30:25,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 100 states have internal predecessors, (103), 38 states have call successors, (38), 22 states have call predecessors, (38), 21 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 15:30:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 176 transitions. [2022-03-20 15:30:25,463 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 176 transitions. Word has length 114 [2022-03-20 15:30:25,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:30:25,464 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 176 transitions. [2022-03-20 15:30:25,464 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 15:30:25,464 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 176 transitions. [2022-03-20 15:30:25,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 15:30:25,465 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:30:25,465 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:30:25,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 15:30:25,683 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,SelfDestructingSolverStorable13 [2022-03-20 15:30:25,683 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:30:25,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:30:25,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 3 times [2022-03-20 15:30:25,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:30:25,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [41210104] [2022-03-20 15:30:25,684 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:30:25,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 4 times [2022-03-20 15:30:25,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:30:25,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736171712] [2022-03-20 15:30:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:30:25,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:30:25,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:30:25,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103927676] [2022-03-20 15:30:25,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:30:25,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:30:25,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:30:25,691 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) [2022-03-20 15:30:25,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 15:30:25,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:30:25,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:30:25,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 15:30:25,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:30:26,428 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:30:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-03-20 15:30:26,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:30:26,617 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 15:30:36,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:30:36,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736171712] [2022-03-20 15:30:36,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:30:36,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103927676] [2022-03-20 15:30:36,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103927676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 15:30:36,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 15:30:36,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-20 15:30:36,922 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:30:36,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [41210104] [2022-03-20 15:30:36,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [41210104] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:30:36,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:30:36,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 15:30:36,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745602487] [2022-03-20 15:30:36,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:30:36,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 15:30:36,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:30:36,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 15:30:36,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-03-20 15:30:36,923 INFO L87 Difference]: Start difference. First operand 155 states and 176 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 15:30:37,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:30:37,938 INFO L93 Difference]: Finished difference Result 161 states and 181 transitions. [2022-03-20 15:30:37,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 15:30:37,938 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 116 [2022-03-20 15:30:37,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:30:37,939 INFO L225 Difference]: With dead ends: 161 [2022-03-20 15:30:37,939 INFO L226 Difference]: Without dead ends: 124 [2022-03-20 15:30:37,940 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2022-03-20 15:30:37,940 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 15:30:37,940 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 438 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 15:30:37,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-20 15:30:37,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-03-20 15:30:37,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 79 states have internal predecessors, (82), 31 states have call successors, (31), 18 states have call predecessors, (31), 17 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 15:30:37,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2022-03-20 15:30:37,957 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 116 [2022-03-20 15:30:37,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:30:37,958 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2022-03-20 15:30:37,958 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-20 15:30:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2022-03-20 15:30:37,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-20 15:30:37,959 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:30:37,959 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:30:37,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 15:30:38,167 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,SelfDestructingSolverStorable14 [2022-03-20 15:30:38,167 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:30:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:30:38,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1921791003, now seen corresponding path program 5 times [2022-03-20 15:30:38,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:30:38,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1381945787] [2022-03-20 15:30:38,168 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:30:38,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1921791003, now seen corresponding path program 6 times [2022-03-20 15:30:38,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:30:38,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305742698] [2022-03-20 15:30:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:30:38,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:30:38,174 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:30:38,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227269494] [2022-03-20 15:30:38,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:30:38,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:30:38,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:30:38,176 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) [2022-03-20 15:30:38,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 15:30:38,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 15:30:38,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:30:38,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-20 15:30:38,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:30:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2022-03-20 15:30:38,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:30:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2022-03-20 15:30:38,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:30:38,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305742698] [2022-03-20 15:30:38,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:30:38,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227269494] [2022-03-20 15:30:38,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227269494] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:30:38,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:30:38,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2022-03-20 15:30:38,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:30:38,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1381945787] [2022-03-20 15:30:38,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1381945787] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:30:38,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:30:38,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:30:38,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719926255] [2022-03-20 15:30:38,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:30:38,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:30:38,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:30:38,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:30:38,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:30:38,698 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2022-03-20 15:30:38,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:30:38,779 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2022-03-20 15:30:38,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 15:30:38,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 120 [2022-03-20 15:30:38,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:30:38,784 INFO L225 Difference]: With dead ends: 150 [2022-03-20 15:30:38,784 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 15:30:38,784 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 230 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:30:38,784 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 20 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:30:38,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 112 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:30:38,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 15:30:38,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-20 15:30:38,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 83 states have (on average 1.108433734939759) internal successors, (92), 87 states have internal predecessors, (92), 36 states have call successors, (36), 18 states have call predecessors, (36), 17 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 15:30:38,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2022-03-20 15:30:38,799 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 120 [2022-03-20 15:30:38,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:30:38,799 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2022-03-20 15:30:38,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2022-03-20 15:30:38,800 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2022-03-20 15:30:38,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 15:30:38,800 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:30:38,800 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:30:38,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 15:30:39,016 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,SelfDestructingSolverStorable15 [2022-03-20 15:30:39,017 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:30:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:30:39,017 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 13 times [2022-03-20 15:30:39,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:30:39,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [461579959] [2022-03-20 15:30:39,018 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:30:39,018 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 14 times [2022-03-20 15:30:39,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:30:39,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110658204] [2022-03-20 15:30:39,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:30:39,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:30:39,023 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:30:39,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753948930] [2022-03-20 15:30:39,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:30:39,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:30:39,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:30:39,025 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) [2022-03-20 15:30:39,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 15:30:39,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:30:39,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:30:39,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 15:30:39,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:30:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2022-03-20 15:30:39,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:31:28,596 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2022-03-20 15:31:28,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:31:28,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110658204] [2022-03-20 15:31:28,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:31:28,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753948930] [2022-03-20 15:31:28,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753948930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:31:28,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:31:28,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2022-03-20 15:31:28,597 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:31:28,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [461579959] [2022-03-20 15:31:28,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [461579959] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:31:28,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:31:28,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 15:31:28,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325043559] [2022-03-20 15:31:28,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:31:28,597 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 15:31:28,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:31:28,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 15:31:28,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2022-03-20 15:31:28,598 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-20 15:31:29,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:31:29,257 INFO L93 Difference]: Finished difference Result 241 states and 293 transitions. [2022-03-20 15:31:29,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 15:31:29,257 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) Word has length 122 [2022-03-20 15:31:29,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:31:29,258 INFO L225 Difference]: With dead ends: 241 [2022-03-20 15:31:29,258 INFO L226 Difference]: Without dead ends: 195 [2022-03-20 15:31:29,259 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-03-20 15:31:29,259 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 30 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 15:31:29,259 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 519 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 15:31:29,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-20 15:31:29,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2022-03-20 15:31:29,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 123 states have internal predecessors, (131), 49 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-20 15:31:29,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 227 transitions. [2022-03-20 15:31:29,275 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 227 transitions. Word has length 122 [2022-03-20 15:31:29,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:31:29,276 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 227 transitions. [2022-03-20 15:31:29,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2022-03-20 15:31:29,276 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 227 transitions. [2022-03-20 15:31:29,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 15:31:29,277 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:31:29,277 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:31:29,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 15:31:29,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:31:29,483 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:31:29,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:31:29,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1224833083, now seen corresponding path program 15 times [2022-03-20 15:31:29,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:31:29,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1955072516] [2022-03-20 15:31:29,484 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:31:29,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1224833083, now seen corresponding path program 16 times [2022-03-20 15:31:29,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:31:29,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226394395] [2022-03-20 15:31:29,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:31:29,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:31:29,490 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:31:29,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106617772] [2022-03-20 15:31:29,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:31:29,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:31:29,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:31:29,491 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) [2022-03-20 15:31:29,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 15:31:29,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:31:29,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:31:29,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 15:31:29,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:31:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 34 proven. 47 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-03-20 15:31:30,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:31:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-03-20 15:31:48,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:31:48,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226394395] [2022-03-20 15:31:48,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:31:48,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106617772] [2022-03-20 15:31:48,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106617772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:31:48,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:31:48,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 25 [2022-03-20 15:31:48,168 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:31:48,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1955072516] [2022-03-20 15:31:48,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1955072516] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:31:48,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:31:48,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 15:31:48,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492562639] [2022-03-20 15:31:48,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:31:48,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 15:31:48,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:31:48,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 15:31:48,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-03-20 15:31:48,169 INFO L87 Difference]: Start difference. First operand 192 states and 227 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-20 15:31:49,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:31:49,075 INFO L93 Difference]: Finished difference Result 238 states and 285 transitions. [2022-03-20 15:31:49,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 15:31:49,076 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) Word has length 127 [2022-03-20 15:31:49,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:31:49,077 INFO L225 Difference]: With dead ends: 238 [2022-03-20 15:31:49,077 INFO L226 Difference]: Without dead ends: 209 [2022-03-20 15:31:49,078 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 15:31:49,078 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 33 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 15:31:49,078 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 699 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 15:31:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-20 15:31:49,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2022-03-20 15:31:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 128 states have (on average 1.1015625) internal successors, (141), 135 states have internal predecessors, (141), 52 states have call successors, (52), 27 states have call predecessors, (52), 26 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-20 15:31:49,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 242 transitions. [2022-03-20 15:31:49,097 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 242 transitions. Word has length 127 [2022-03-20 15:31:49,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:31:49,098 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 242 transitions. [2022-03-20 15:31:49,098 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-20 15:31:49,098 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 242 transitions. [2022-03-20 15:31:49,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 15:31:49,099 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:31:49,099 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:31:49,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 15:31:49,315 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,SelfDestructingSolverStorable17 [2022-03-20 15:31:49,315 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:31:49,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:31:49,316 INFO L85 PathProgramCache]: Analyzing trace with hash -243845479, now seen corresponding path program 17 times [2022-03-20 15:31:49,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:31:49,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [138618891] [2022-03-20 15:31:49,316 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:31:49,316 INFO L85 PathProgramCache]: Analyzing trace with hash -243845479, now seen corresponding path program 18 times [2022-03-20 15:31:49,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:31:49,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219463270] [2022-03-20 15:31:49,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:31:49,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:31:49,322 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:31:49,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1861408703] [2022-03-20 15:31:49,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:31:49,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:31:49,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:31:49,324 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) [2022-03-20 15:31:49,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 15:31:49,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-20 15:31:49,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:31:49,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-20 15:31:49,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:32:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 134 proven. 50 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2022-03-20 15:32:37,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:32:53,960 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~B~0 4294967296))) (or (= c_main_~p~0 1) (not (= c_main_~d~0 (* c_main_~p~0 .cse0))) (let ((.cse5 (= (mod c_main_~p~0 2) 0)) (.cse7 (div c_main_~d~0 2)) (.cse11 (div c_main_~p~0 2))) (let ((.cse6 (* (+ c_main_~q~0 .cse11 1) .cse0)) (.cse1 (mod c_main_~A~0 4294967296)) (.cse2 (* (+ c_main_~q~0 .cse11) .cse0)) (.cse3 (* (- 1) .cse7)) (.cse4 (not .cse5)) (.cse9 (< c_main_~d~0 0)) (.cse8 (= (mod c_main_~d~0 2) 0))) (and (or (and (or (= .cse1 (+ (- 1) .cse2 c_main_~r~0 .cse3)) .cse4) (or .cse5 (= .cse1 (+ (- 1) c_main_~r~0 .cse3 .cse6)))) (not (<= (+ .cse7 1) c_main_~r~0)) .cse8 (not .cse9)) (or (let ((.cse10 (< c_main_~p~0 0))) (and (or (= .cse1 (+ c_main_~r~0 .cse3 .cse6)) .cse5 (not .cse10)) (or (= .cse1 (+ .cse2 c_main_~r~0 .cse3)) (and .cse4 .cse10)))) (and .cse9 (not .cse8)) (not (<= .cse7 c_main_~r~0)))))))) is different from true [2022-03-20 15:33:36,785 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse11 (mod c_main_~B~0 4294967296))) (or (let ((.cse5 (= (mod c_main_~p~0 2) 0)) (.cse0 (div c_main_~d~0 2)) (.cse12 (div c_main_~p~0 2))) (let ((.cse9 (< c_main_~d~0 0)) (.cse8 (= (mod c_main_~d~0 2) 0)) (.cse4 (* (+ c_main_~q~0 c_main_~p~0 .cse12 1) .cse11)) (.cse1 (mod c_main_~A~0 4294967296)) (.cse6 (* .cse11 (+ c_main_~q~0 c_main_~p~0 .cse12))) (.cse2 (* (- 1) c_main_~d~0)) (.cse3 (* (- 1) .cse0)) (.cse7 (not .cse5))) (and (or (not (<= (+ c_main_~d~0 .cse0 1) c_main_~r~0)) (and (or (= .cse1 (+ (- 1) .cse2 c_main_~r~0 .cse3 .cse4)) .cse5) (or (= .cse1 (+ (- 1) .cse6 .cse2 c_main_~r~0 .cse3)) .cse7)) .cse8 (not .cse9)) (or (not (<= (+ c_main_~d~0 .cse0) c_main_~r~0)) (and .cse9 (not .cse8)) (let ((.cse10 (< c_main_~p~0 0))) (and (or (= .cse1 (+ .cse2 c_main_~r~0 .cse3 .cse4)) .cse5 (not .cse10)) (or (= .cse1 (+ .cse6 .cse2 c_main_~r~0 .cse3)) (and .cse7 .cse10)))))))) (= c_main_~p~0 1) (not (= c_main_~d~0 (* c_main_~p~0 .cse11))))) is different from true [2022-03-20 15:34:56,209 WARN L232 SmtUtils]: Spent 34.58s on a formula simplification that was a NOOP. DAG size: 133 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 15:37:05,132 WARN L833 $PredicateComparison]: unable to prove that (or (= c_main_~p~0 1) (let ((.cse16 (mod c_main_~B~0 4294967296)) (.cse19 (div c_main_~p~0 2)) (.cse22 (< c_main_~d~0 0)) (.cse4 (= (mod c_main_~d~0 2) 0)) (.cse2 (div c_main_~d~0 2))) (let ((.cse3 (+ .cse2 1)) (.cse0 (and .cse22 (not .cse4))) (.cse6 (mod c_main_~A~0 4294967296)) (.cse9 (* (- 1) c_main_~d~0)) (.cse17 (* .cse16 .cse19)) (.cse5 (= (mod c_main_~p~0 2) 0)) (.cse21 (< c_main_~p~0 0))) (and (let ((.cse20 (+ .cse19 1))) (let ((.cse1 (* .cse20 .cse16))) (or (and (or .cse0 (not (= .cse1 .cse2))) (or (not (= .cse3 .cse1)) .cse4)) .cse5 (let ((.cse18 (div .cse20 2)) (.cse11 (= (mod .cse20 2) 0))) (let ((.cse12 (not .cse11)) (.cse13 (* (+ c_main_~q~0 .cse18 c_main_~p~0 .cse19 1) .cse16)) (.cse7 (* (- 1) (div .cse1 2))) (.cse8 (* (+ c_main_~q~0 .cse18 2 c_main_~p~0 .cse19) .cse16)) (.cse10 (* (- 1) .cse1)) (.cse15 (div (+ .cse16 .cse17) 2)) (.cse14 (= (mod .cse1 2) 0))) (and (or (and (or (= .cse6 (+ .cse7 .cse8 .cse9 c_main_~r~0 .cse10)) .cse11) (or .cse12 (= (+ .cse7 .cse13 .cse9 c_main_~r~0 .cse10) .cse6))) (not .cse14) (not (<= (+ c_main_~d~0 .cse15 .cse16 .cse17) c_main_~r~0))) (or (and (or .cse12 (= .cse6 (+ (- 1) .cse7 .cse13 .cse9 c_main_~r~0 .cse10))) (or (= (+ (- 1) .cse7 .cse8 .cse9 c_main_~r~0 .cse10) .cse6) .cse11)) (not (<= (+ c_main_~d~0 .cse15 .cse16 .cse17 1) c_main_~r~0)) .cse14)))) (not .cse21)))) (or (= .cse19 1) (and (or (not (= .cse3 .cse17)) .cse4 (not .cse22)) (or .cse0 (not (= .cse2 .cse17)))) (let ((.cse30 (div .cse17 2)) (.cse33 (div .cse19 2)) (.cse24 (= (mod .cse19 2) 0))) (let ((.cse23 (= (mod .cse17 2) 0)) (.cse31 (< .cse17 0)) (.cse29 (not .cse24)) (.cse28 (* (+ c_main_~q~0 c_main_~p~0 .cse19 .cse33) .cse16)) (.cse25 (* (- 1) .cse30)) (.cse26 (* (- 1) .cse17)) (.cse27 (* .cse16 (+ c_main_~q~0 c_main_~p~0 .cse19 .cse33 1)))) (and (or .cse23 (and (or .cse24 (= (+ (- 1) .cse25 .cse26 .cse9 c_main_~r~0 .cse27) .cse6)) (or (= .cse6 (+ (- 1) .cse25 .cse26 .cse9 .cse28 c_main_~r~0)) .cse29)) (not (<= (+ c_main_~d~0 .cse17 1 .cse30) c_main_~r~0)) (not .cse31)) (or (and (not .cse23) .cse31) (let ((.cse32 (< .cse19 0))) (and (or (and .cse29 .cse32) (= .cse6 (+ .cse25 .cse26 .cse9 .cse28 c_main_~r~0))) (or (not .cse32) (= .cse6 (+ .cse25 .cse26 .cse9 c_main_~r~0 .cse27)) .cse24))) (not (<= (+ c_main_~d~0 .cse17 .cse30) c_main_~r~0)))))) (and (not .cse5) .cse21)))))) is different from false