/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 03:20:01,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 03:20:01,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 03:20:01,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 03:20:01,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 03:20:01,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 03:20:01,514 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 03:20:01,515 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 03:20:01,523 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 03:20:01,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 03:20:01,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 03:20:01,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 03:20:01,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 03:20:01,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 03:20:01,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 03:20:01,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 03:20:01,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 03:20:01,526 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 03:20:01,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 03:20:01,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 03:20:01,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 03:20:01,526 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 03:20:01,526 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 03:20:01,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 03:20:01,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 03:20:01,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 03:20:01,527 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 03:20:01,527 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 03:20:01,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 03:20:01,527 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 03:20:01,527 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 03:20:01,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 03:20:01,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 03:20:01,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 03:20:01,729 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 03:20:01,730 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 03:20:01,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound20.c [2022-03-18 03:20:01,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77f556c00/1144e8a39afb4f50b185613a4637dd4e/FLAGb74783f45 [2022-03-18 03:20:02,154 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 03:20:02,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound20.c [2022-03-18 03:20:02,160 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77f556c00/1144e8a39afb4f50b185613a4637dd4e/FLAGb74783f45 [2022-03-18 03:20:02,173 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77f556c00/1144e8a39afb4f50b185613a4637dd4e [2022-03-18 03:20:02,175 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 03:20:02,177 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 03:20:02,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 03:20:02,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 03:20:02,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 03:20:02,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 03:20:02" (1/1) ... [2022-03-18 03:20:02,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@535bfe1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:20:02, skipping insertion in model container [2022-03-18 03:20:02,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 03:20:02" (1/1) ... [2022-03-18 03:20:02,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 03:20:02,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 03:20:02,358 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_valuebound20.c[538,551] [2022-03-18 03:20:02,378 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 03:20:02,386 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 03:20:02,393 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_valuebound20.c[538,551] [2022-03-18 03:20:02,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 03:20:02,418 INFO L208 MainTranslator]: Completed translation [2022-03-18 03:20:02,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:20:02 WrapperNode [2022-03-18 03:20:02,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 03:20:02,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 03:20:02,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 03:20:02,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 03:20:02,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:20:02" (1/1) ... [2022-03-18 03:20:02,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:20:02" (1/1) ... [2022-03-18 03:20:02,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:20:02" (1/1) ... [2022-03-18 03:20:02,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:20:02" (1/1) ... [2022-03-18 03:20:02,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:20:02" (1/1) ... [2022-03-18 03:20:02,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:20:02" (1/1) ... [2022-03-18 03:20:02,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:20:02" (1/1) ... [2022-03-18 03:20:02,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 03:20:02,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 03:20:02,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 03:20:02,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 03:20:02,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:20:02" (1/1) ... [2022-03-18 03:20:02,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 03:20:02,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:20:02,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 03:20:02,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 03:20:02,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 03:20:02,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 03:20:02,511 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 03:20:02,511 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 03:20:02,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 03:20:02,511 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 03:20:02,511 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 03:20:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 03:20:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 03:20:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 03:20:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-18 03:20:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 03:20:02,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 03:20:02,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 03:20:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 03:20:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 03:20:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 03:20:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 03:20:02,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 03:20:02,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 03:20:02,553 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 03:20:02,554 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 03:20:02,647 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 03:20:02,651 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 03:20:02,651 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 03:20:02,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 03:20:02 BoogieIcfgContainer [2022-03-18 03:20:02,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 03:20:02,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 03:20:02,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 03:20:02,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 03:20:02,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 03:20:02" (1/3) ... [2022-03-18 03:20:02,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14da2f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 03:20:02, skipping insertion in model container [2022-03-18 03:20:02,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:20:02" (2/3) ... [2022-03-18 03:20:02,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14da2f4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 03:20:02, skipping insertion in model container [2022-03-18 03:20:02,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 03:20:02" (3/3) ... [2022-03-18 03:20:02,657 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound20.c [2022-03-18 03:20:02,660 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 03:20:02,661 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 03:20:02,713 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 03:20:02,718 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 03:20:02,718 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 03:20:02,732 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) [2022-03-18 03:20:02,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 03:20:02,737 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:20:02,738 INFO L500 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] [2022-03-18 03:20:02,738 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:20:02,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:20:02,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-03-18 03:20:02,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:02,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [858726532] [2022-03-18 03:20:02,783 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:20:02,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 2 times [2022-03-18 03:20:02,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:20:02,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988440331] [2022-03-18 03:20:02,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:20:02,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:20:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:20:02,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:20:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:20:02,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 03:20:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:20:02,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 03:20:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:20:02,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 03:20:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:20:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 03:20:02,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:20:02,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988440331] [2022-03-18 03:20:02,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988440331] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:20:02,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:20:02,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 03:20:02,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:20:02,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [858726532] [2022-03-18 03:20:02,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [858726532] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:20:02,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:20:02,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 03:20:02,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140662722] [2022-03-18 03:20:02,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:20:02,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 03:20:02,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:03,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 03:20:03,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 03:20:03,005 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) [2022-03-18 03:20:03,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:20:03,091 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-03-18 03:20:03,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 03:20:03,093 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 [2022-03-18 03:20:03,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:20:03,097 INFO L225 Difference]: With dead ends: 69 [2022-03-18 03:20:03,098 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 03:20:03,101 INFO L911 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 [2022-03-18 03:20:03,103 INFO L912 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:20:03,104 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:20:03,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 03:20:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-18 03:20:03,131 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) [2022-03-18 03:20:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-18 03:20:03,133 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-18 03:20:03,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:20:03,134 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-18 03:20:03,134 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) [2022-03-18 03:20:03,134 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-18 03:20:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 03:20:03,135 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:20:03,135 INFO L500 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] [2022-03-18 03:20:03,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 03:20:03,136 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:20:03,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:20:03,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-03-18 03:20:03,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:03,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1772362763] [2022-03-18 03:20:03,137 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:20:03,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 2 times [2022-03-18 03:20:03,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:20:03,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801190364] [2022-03-18 03:20:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:20:03,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:20:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:20:03,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:20:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:20:03,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 03:20:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:20:03,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 03:20:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:20:03,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 03:20:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:20:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 03:20:03,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:20:03,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801190364] [2022-03-18 03:20:03,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801190364] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:20:03,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:20:03,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:20:03,287 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:20:03,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1772362763] [2022-03-18 03:20:03,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1772362763] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:20:03,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:20:03,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:20:03,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844551208] [2022-03-18 03:20:03,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:20:03,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 03:20:03,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:03,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 03:20:03,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:20:03,289 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) [2022-03-18 03:20:03,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:20:03,491 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-18 03:20:03,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 03:20:03,491 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 [2022-03-18 03:20:03,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:20:03,492 INFO L225 Difference]: With dead ends: 46 [2022-03-18 03:20:03,492 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 03:20:03,492 INFO L911 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 [2022-03-18 03:20:03,493 INFO L912 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 03:20:03,494 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 03:20:03,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 03:20:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-18 03:20:03,506 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) [2022-03-18 03:20:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-18 03:20:03,507 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-18 03:20:03,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:20:03,507 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-18 03:20:03,507 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) [2022-03-18 03:20:03,507 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-18 03:20:03,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-18 03:20:03,508 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:20:03,508 INFO L500 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] [2022-03-18 03:20:03,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 03:20:03,508 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:20:03,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:20:03,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-03-18 03:20:03,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:03,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1047450614] [2022-03-18 03:20:03,509 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:20:03,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 2 times [2022-03-18 03:20:03,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:20:03,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941801385] [2022-03-18 03:20:03,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:20:03,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:20:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:20:03,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:20:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:20:03,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 03:20:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:20:03,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-18 03:20:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:20:03,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-18 03:20:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:20:03,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-18 03:20:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:20:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 03:20:03,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:20:03,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941801385] [2022-03-18 03:20:03,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941801385] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:20:03,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:20:03,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:20:03,627 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:20:03,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1047450614] [2022-03-18 03:20:03,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1047450614] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:20:03,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:20:03,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:20:03,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794801419] [2022-03-18 03:20:03,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:20:03,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 03:20:03,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:03,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 03:20:03,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:20:03,629 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) [2022-03-18 03:20:03,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:20:03,829 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-18 03:20:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 03:20:03,829 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 [2022-03-18 03:20:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:20:03,833 INFO L225 Difference]: With dead ends: 50 [2022-03-18 03:20:03,834 INFO L226 Difference]: Without dead ends: 48 [2022-03-18 03:20:03,835 INFO L911 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 [2022-03-18 03:20:03,837 INFO L912 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 [2022-03-18 03:20:03,837 INFO L913 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] [2022-03-18 03:20:03,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-18 03:20:03,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-18 03:20:03,845 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) [2022-03-18 03:20:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-18 03:20:03,846 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-18 03:20:03,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:20:03,846 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-18 03:20:03,846 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) [2022-03-18 03:20:03,847 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-18 03:20:03,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 03:20:03,850 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:20:03,850 INFO L500 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] [2022-03-18 03:20:03,850 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 03:20:03,852 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:20:03,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:20:03,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-03-18 03:20:03,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:03,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [267733379] [2022-03-18 03:20:03,856 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:20:03,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 2 times [2022-03-18 03:20:03,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:20:03,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881535644] [2022-03-18 03:20:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:20:03,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:20:03,884 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:20:03,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842763282] [2022-03-18 03:20:03,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:20:03,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:20:03,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:20:03,887 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:20:03,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 03:20:03,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:20:03,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:20:03,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 03:20:03,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:20:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 03:20:04,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:20:04,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:20:04,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881535644] [2022-03-18 03:20:04,092 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:20:04,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842763282] [2022-03-18 03:20:04,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842763282] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:20:04,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:20:04,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:20:04,092 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:20:04,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [267733379] [2022-03-18 03:20:04,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [267733379] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:20:04,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:20:04,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:20:04,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62867312] [2022-03-18 03:20:04,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:20:04,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 03:20:04,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:04,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 03:20:04,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:20:04,094 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) [2022-03-18 03:20:04,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:20:04,153 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-03-18 03:20:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 03:20:04,153 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 [2022-03-18 03:20:04,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:20:04,154 INFO L225 Difference]: With dead ends: 69 [2022-03-18 03:20:04,154 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 03:20:04,155 INFO L911 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 [2022-03-18 03:20:04,155 INFO L912 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 [2022-03-18 03:20:04,156 INFO L913 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] [2022-03-18 03:20:04,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 03:20:04,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-18 03:20:04,171 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) [2022-03-18 03:20:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-18 03:20:04,172 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-03-18 03:20:04,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:20:04,172 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-18 03:20:04,172 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) [2022-03-18 03:20:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-18 03:20:04,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 03:20:04,173 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:20:04,173 INFO L500 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] [2022-03-18 03:20:04,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 03:20:04,379 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 [2022-03-18 03:20:04,380 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:20:04,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:20:04,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-03-18 03:20:04,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:04,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1018000760] [2022-03-18 03:20:04,381 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:20:04,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 2 times [2022-03-18 03:20:04,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:20:04,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411751718] [2022-03-18 03:20:04,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:20:04,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:20:04,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:20:04,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189604078] [2022-03-18 03:20:04,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:20:04,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:20:04,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:20:04,401 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:20:04,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 03:20:04,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:20:04,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:20:04,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 03:20:04,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:20:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 03:20:04,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 03:20:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 03:20:04,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:20:04,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411751718] [2022-03-18 03:20:04,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:20:04,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189604078] [2022-03-18 03:20:04,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189604078] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 03:20:04,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 03:20:04,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-18 03:20:04,924 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:20:04,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1018000760] [2022-03-18 03:20:04,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1018000760] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:20:04,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:20:04,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:20:04,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127139765] [2022-03-18 03:20:04,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:20:04,928 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 03:20:04,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:04,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 03:20:04,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-18 03:20:04,930 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) [2022-03-18 03:20:04,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:20:04,989 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-03-18 03:20:04,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 03:20:04,989 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 [2022-03-18 03:20:04,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:20:05,000 INFO L225 Difference]: With dead ends: 68 [2022-03-18 03:20:05,001 INFO L226 Difference]: Without dead ends: 66 [2022-03-18 03:20:05,001 INFO L911 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 [2022-03-18 03:20:05,003 INFO L912 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 [2022-03-18 03:20:05,004 INFO L913 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] [2022-03-18 03:20:05,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-18 03:20:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-18 03:20:05,027 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) [2022-03-18 03:20:05,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-03-18 03:20:05,032 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-03-18 03:20:05,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:20:05,033 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-03-18 03:20:05,033 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) [2022-03-18 03:20:05,033 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-03-18 03:20:05,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 03:20:05,039 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:20:05,039 INFO L500 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] [2022-03-18 03:20:05,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 03:20:05,247 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 [2022-03-18 03:20:05,248 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:20:05,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:20:05,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-03-18 03:20:05,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:05,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [946574810] [2022-03-18 03:20:05,249 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:20:05,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 2 times [2022-03-18 03:20:05,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:20:05,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501992911] [2022-03-18 03:20:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:20:05,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:20:05,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:20:05,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129531957] [2022-03-18 03:20:05,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:20:05,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:20:05,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:20:05,263 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:20:05,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 03:20:05,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:20:05,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:20:05,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-18 03:20:05,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:20:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-18 03:20:05,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 03:20:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-18 03:20:05,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:20:05,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501992911] [2022-03-18 03:20:05,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:20:05,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129531957] [2022-03-18 03:20:05,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129531957] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 03:20:05,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 03:20:05,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-18 03:20:05,632 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:20:05,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [946574810] [2022-03-18 03:20:05,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [946574810] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:20:05,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:20:05,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:20:05,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720130574] [2022-03-18 03:20:05,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:20:05,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 03:20:05,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:05,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 03:20:05,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 03:20:05,644 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) [2022-03-18 03:20:05,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:20:05,690 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-03-18 03:20:05,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 03:20:05,690 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 [2022-03-18 03:20:05,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:20:05,694 INFO L225 Difference]: With dead ends: 76 [2022-03-18 03:20:05,694 INFO L226 Difference]: Without dead ends: 74 [2022-03-18 03:20:05,694 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-18 03:20:05,696 INFO L912 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 [2022-03-18 03:20:05,696 INFO L913 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] [2022-03-18 03:20:05,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-18 03:20:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-03-18 03:20:05,717 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) [2022-03-18 03:20:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-03-18 03:20:05,720 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-03-18 03:20:05,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:20:05,720 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-03-18 03:20:05,720 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) [2022-03-18 03:20:05,720 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-03-18 03:20:05,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-18 03:20:05,722 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:20:05,722 INFO L500 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] [2022-03-18 03:20:05,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 03:20:05,927 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 [2022-03-18 03:20:05,928 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:20:05,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:20:05,928 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-03-18 03:20:05,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:05,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [38491824] [2022-03-18 03:20:05,928 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:20:05,929 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 2 times [2022-03-18 03:20:05,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:20:05,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148264335] [2022-03-18 03:20:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:20:05,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:20:05,936 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:20:05,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364923962] [2022-03-18 03:20:05,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:20:05,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:20:05,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:20:05,937 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:20:05,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 03:20:05,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:20:05,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:20:05,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 03:20:05,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:20:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 03:20:06,089 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:20:06,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:20:06,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148264335] [2022-03-18 03:20:06,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:20:06,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364923962] [2022-03-18 03:20:06,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364923962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:20:06,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:20:06,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:20:06,090 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:20:06,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [38491824] [2022-03-18 03:20:06,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [38491824] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:20:06,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:20:06,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:20:06,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162167436] [2022-03-18 03:20:06,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:20:06,091 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 03:20:06,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:06,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 03:20:06,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:20:06,092 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) [2022-03-18 03:20:06,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:20:06,139 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-03-18 03:20:06,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 03:20:06,140 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 [2022-03-18 03:20:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:20:06,143 INFO L225 Difference]: With dead ends: 79 [2022-03-18 03:20:06,143 INFO L226 Difference]: Without dead ends: 72 [2022-03-18 03:20:06,143 INFO L911 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 [2022-03-18 03:20:06,144 INFO L912 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 [2022-03-18 03:20:06,144 INFO L913 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] [2022-03-18 03:20:06,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-18 03:20:06,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-18 03:20:06,157 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) [2022-03-18 03:20:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-03-18 03:20:06,159 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-03-18 03:20:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:20:06,159 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-03-18 03:20:06,159 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) [2022-03-18 03:20:06,159 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-03-18 03:20:06,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-18 03:20:06,160 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:20:06,160 INFO L500 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] [2022-03-18 03:20:06,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 03:20:06,377 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 [2022-03-18 03:20:06,377 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:20:06,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:20:06,377 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2022-03-18 03:20:06,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:06,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [79364693] [2022-03-18 03:20:06,378 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:20:06,378 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 2 times [2022-03-18 03:20:06,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:20:06,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390783258] [2022-03-18 03:20:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:20:06,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:20:06,386 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:20:06,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59342981] [2022-03-18 03:20:06,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:20:06,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:20:06,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:20:06,388 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:20:06,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 03:20:06,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:20:06,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:20:06,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 03:20:06,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:20:07,019 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-18 03:20:07,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 03:20:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-18 03:20:08,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:20:08,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390783258] [2022-03-18 03:20:08,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:20:08,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59342981] [2022-03-18 03:20:08,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59342981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 03:20:08,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 03:20:08,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-18 03:20:08,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:20:08,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [79364693] [2022-03-18 03:20:08,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [79364693] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:20:08,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:20:08,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 03:20:08,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632323146] [2022-03-18 03:20:08,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:20:08,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 03:20:08,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:08,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 03:20:08,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-18 03:20:08,122 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) [2022-03-18 03:20:08,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:20:08,279 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2022-03-18 03:20:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 03:20:08,279 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 [2022-03-18 03:20:08,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:20:08,281 INFO L225 Difference]: With dead ends: 135 [2022-03-18 03:20:08,281 INFO L226 Difference]: Without dead ends: 108 [2022-03-18 03:20:08,282 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-18 03:20:08,283 INFO L912 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 [2022-03-18 03:20:08,283 INFO L913 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] [2022-03-18 03:20:08,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-18 03:20:08,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-03-18 03:20:08,295 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) [2022-03-18 03:20:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2022-03-18 03:20:08,296 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 75 [2022-03-18 03:20:08,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:20:08,296 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2022-03-18 03:20:08,296 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) [2022-03-18 03:20:08,297 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2022-03-18 03:20:08,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-18 03:20:08,297 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:20:08,298 INFO L500 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] [2022-03-18 03:20:08,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 03:20:08,515 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 [2022-03-18 03:20:08,515 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:20:08,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:20:08,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 3 times [2022-03-18 03:20:08,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:08,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [212986501] [2022-03-18 03:20:08,516 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:20:08,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 4 times [2022-03-18 03:20:08,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:20:08,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013057930] [2022-03-18 03:20:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:20:08,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:20:08,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:20:08,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567437188] [2022-03-18 03:20:08,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 03:20:08,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:20:08,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:20:08,525 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:20:08,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 03:20:08,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 03:20:08,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:20:08,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-18 03:20:08,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:20:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-18 03:20:08,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 03:20:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-18 03:20:10,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:20:10,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013057930] [2022-03-18 03:20:10,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:20:10,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567437188] [2022-03-18 03:20:10,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567437188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 03:20:10,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 03:20:10,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-03-18 03:20:10,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:20:10,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [212986501] [2022-03-18 03:20:10,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [212986501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:20:10,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:20:10,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 03:20:10,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957982078] [2022-03-18 03:20:10,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:20:10,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 03:20:10,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:10,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 03:20:10,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 03:20:10,645 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) [2022-03-18 03:20:10,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:20:10,770 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2022-03-18 03:20:10,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 03:20:10,771 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 [2022-03-18 03:20:10,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:20:10,772 INFO L225 Difference]: With dead ends: 133 [2022-03-18 03:20:10,772 INFO L226 Difference]: Without dead ends: 110 [2022-03-18 03:20:10,773 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-18 03:20:10,773 INFO L912 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 [2022-03-18 03:20:10,774 INFO L913 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] [2022-03-18 03:20:10,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-18 03:20:10,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-18 03:20:10,788 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) [2022-03-18 03:20:10,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2022-03-18 03:20:10,789 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 80 [2022-03-18 03:20:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:20:10,789 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2022-03-18 03:20:10,789 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) [2022-03-18 03:20:10,789 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2022-03-18 03:20:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-18 03:20:10,790 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:20:10,790 INFO L500 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] [2022-03-18 03:20:10,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 03:20:10,995 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 [2022-03-18 03:20:10,995 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:20:10,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:20:10,996 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2022-03-18 03:20:10,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:10,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1664601708] [2022-03-18 03:20:10,996 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:20:10,996 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 2 times [2022-03-18 03:20:10,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:20:10,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106810911] [2022-03-18 03:20:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:20:10,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:20:11,003 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:20:11,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135546028] [2022-03-18 03:20:11,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:20:11,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:20:11,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:20:11,005 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:20:11,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 03:20:11,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:20:11,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:20:11,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-18 03:20:11,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:20:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-18 03:20:12,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 03:20:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-18 03:20:25,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:20:25,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106810911] [2022-03-18 03:20:25,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:20:25,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135546028] [2022-03-18 03:20:25,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135546028] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 03:20:25,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 03:20:25,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-03-18 03:20:25,317 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:20:25,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1664601708] [2022-03-18 03:20:25,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1664601708] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:20:25,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:20:25,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-18 03:20:25,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566813140] [2022-03-18 03:20:25,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:20:25,317 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 03:20:25,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:25,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 03:20:25,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-18 03:20:25,318 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) [2022-03-18 03:20:26,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:20:26,326 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2022-03-18 03:20:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 03:20:26,327 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 [2022-03-18 03:20:26,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:20:26,327 INFO L225 Difference]: With dead ends: 116 [2022-03-18 03:20:26,328 INFO L226 Difference]: Without dead ends: 88 [2022-03-18 03:20:26,328 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-03-18 03:20:26,328 INFO L912 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 [2022-03-18 03:20:26,328 INFO L913 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] [2022-03-18 03:20:26,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-18 03:20:26,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-18 03:20:26,335 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) [2022-03-18 03:20:26,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2022-03-18 03:20:26,335 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 86 [2022-03-18 03:20:26,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:20:26,335 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2022-03-18 03:20:26,335 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) [2022-03-18 03:20:26,336 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2022-03-18 03:20:26,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-18 03:20:26,337 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:20:26,338 INFO L500 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] [2022-03-18 03:20:26,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-18 03:20:26,552 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 [2022-03-18 03:20:26,552 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:20:26,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:20:26,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 5 times [2022-03-18 03:20:26,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:20:26,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [381188760] [2022-03-18 03:20:26,553 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:20:26,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 6 times [2022-03-18 03:20:26,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:20:26,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703754518] [2022-03-18 03:20:26,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:20:26,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:20:26,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:20:26,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2021589286] [2022-03-18 03:20:26,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 03:20:26,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:20:26,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:20:26,577 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:20:26,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 03:20:26,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-18 03:20:26,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:20:26,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-18 03:20:26,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:20:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-18 03:20:39,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 03:21:25,816 WARN L232 SmtUtils]: Spent 26.33s 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) [2022-03-18 03:22:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-18 03:22:30,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:22:30,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703754518] [2022-03-18 03:22:30,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:22:30,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021589286] [2022-03-18 03:22:30,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021589286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 03:22:30,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 03:22:30,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2022-03-18 03:22:30,634 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:22:30,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [381188760] [2022-03-18 03:22:30,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [381188760] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:22:30,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:22:30,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 03:22:30,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481685124] [2022-03-18 03:22:30,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:22:30,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 03:22:30,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:22:30,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 03:22:30,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-18 03:22:30,636 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) [2022-03-18 03:22:33,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:22:33,128 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-03-18 03:22:33,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 03:22:33,129 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 [2022-03-18 03:22:33,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:22:33,131 INFO L225 Difference]: With dead ends: 112 [2022-03-18 03:22:33,132 INFO L226 Difference]: Without dead ends: 100 [2022-03-18 03:22:33,132 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 31.4s TimeCoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2022-03-18 03:22:33,132 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 03:22:33,133 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 259 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 03:22:33,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-18 03:22:33,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-03-18 03:22:33,141 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) [2022-03-18 03:22:33,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2022-03-18 03:22:33,142 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 92 [2022-03-18 03:22:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:22:33,143 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2022-03-18 03:22:33,144 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) [2022-03-18 03:22:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2022-03-18 03:22:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-18 03:22:33,144 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:22:33,144 INFO L500 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] [2022-03-18 03:22:33,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 03:22:33,355 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 [2022-03-18 03:22:33,355 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:22:33,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:22:33,356 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 7 times [2022-03-18 03:22:33,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:22:33,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [767273281] [2022-03-18 03:22:33,356 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:22:33,356 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 8 times [2022-03-18 03:22:33,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:22:33,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616036886] [2022-03-18 03:22:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:22:33,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:22:33,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:22:33,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274012888] [2022-03-18 03:22:33,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:22:33,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:22:33,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:22:33,374 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:22:33,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 03:22:33,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:22:33,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:22:33,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-18 03:22:33,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:22:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-18 03:22:33,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 03:22:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-18 03:22:36,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:22:36,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616036886] [2022-03-18 03:22:36,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:22:36,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274012888] [2022-03-18 03:22:36,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274012888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 03:22:36,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 03:22:36,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-18 03:22:36,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:22:36,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [767273281] [2022-03-18 03:22:36,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [767273281] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:22:36,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:22:36,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 03:22:36,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643883677] [2022-03-18 03:22:36,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:22:36,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 03:22:36,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:22:36,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 03:22:36,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-18 03:22:36,458 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) [2022-03-18 03:22:36,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:22:36,748 INFO L93 Difference]: Finished difference Result 177 states and 223 transitions. [2022-03-18 03:22:36,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 03:22:36,748 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 [2022-03-18 03:22:36,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:22:36,749 INFO L225 Difference]: With dead ends: 177 [2022-03-18 03:22:36,749 INFO L226 Difference]: Without dead ends: 138 [2022-03-18 03:22:36,750 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-18 03:22:36,750 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:22:36,750 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 400 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:22:36,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-18 03:22:36,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-03-18 03:22:36,774 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) [2022-03-18 03:22:36,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 167 transitions. [2022-03-18 03:22:36,776 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 167 transitions. Word has length 97 [2022-03-18 03:22:36,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:22:36,777 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 167 transitions. [2022-03-18 03:22:36,777 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) [2022-03-18 03:22:36,777 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 167 transitions. [2022-03-18 03:22:36,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-18 03:22:36,778 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:22:36,778 INFO L500 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] [2022-03-18 03:22:36,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 03:22:36,995 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 [2022-03-18 03:22:36,995 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:22:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:22:36,996 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 9 times [2022-03-18 03:22:36,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:22:36,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [113650913] [2022-03-18 03:22:36,996 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:22:36,996 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 10 times [2022-03-18 03:22:36,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:22:36,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200776545] [2022-03-18 03:22:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:22:36,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:22:37,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:22:37,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969161121] [2022-03-18 03:22:37,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 03:22:37,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:22:37,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:22:37,008 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:22:37,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 03:22:37,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 03:22:37,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:22:37,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-18 03:22:37,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:22:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 58 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-18 03:22:38,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 03:23:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 58 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-18 03:23:22,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:23:22,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200776545] [2022-03-18 03:23:22,549 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:23:22,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969161121] [2022-03-18 03:23:22,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969161121] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 03:23:22,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 03:23:22,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-18 03:23:22,549 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:23:22,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [113650913] [2022-03-18 03:23:22,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [113650913] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:22,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:22,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 03:23:22,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175879907] [2022-03-18 03:23:22,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:23:22,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 03:23:22,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:22,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 03:23:22,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-03-18 03:23:22,551 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) [2022-03-18 03:23:23,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:23:23,705 INFO L93 Difference]: Finished difference Result 184 states and 208 transitions. [2022-03-18 03:23:23,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 03:23:23,705 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 [2022-03-18 03:23:23,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:23:23,706 INFO L225 Difference]: With dead ends: 184 [2022-03-18 03:23:23,706 INFO L226 Difference]: Without dead ends: 147 [2022-03-18 03:23:23,706 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-03-18 03:23:23,707 INFO L912 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 [2022-03-18 03:23:23,707 INFO L913 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] [2022-03-18 03:23:23,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-18 03:23:23,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-03-18 03:23:23,718 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) [2022-03-18 03:23:23,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 167 transitions. [2022-03-18 03:23:23,718 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 167 transitions. Word has length 105 [2022-03-18 03:23:23,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:23:23,719 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 167 transitions. [2022-03-18 03:23:23,719 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) [2022-03-18 03:23:23,719 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 167 transitions. [2022-03-18 03:23:23,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-18 03:23:23,720 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:23:23,720 INFO L500 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] [2022-03-18 03:23:23,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 03:23:23,933 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 [2022-03-18 03:23:23,934 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:23:23,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:23:23,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 11 times [2022-03-18 03:23:23,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:23,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2009364607] [2022-03-18 03:23:23,935 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:23:23,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 12 times [2022-03-18 03:23:23,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:23:23,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113694318] [2022-03-18 03:23:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:23:23,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:23:23,941 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:23:23,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053962473] [2022-03-18 03:23:23,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 03:23:23,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:23:23,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:23:23,942 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:23:23,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 03:23:24,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 03:23:24,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:23:24,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 03:23:24,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:23:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 96 proven. 4 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2022-03-18 03:23:24,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 03:23:24,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:23:24,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113694318] [2022-03-18 03:23:24,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:23:24,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053962473] [2022-03-18 03:23:24,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053962473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 03:23:24,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 03:23:24,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-18 03:23:24,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:23:24,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2009364607] [2022-03-18 03:23:24,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2009364607] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:24,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:24,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 03:23:24,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401335709] [2022-03-18 03:23:24,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:23:24,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 03:23:24,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:24,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 03:23:24,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-03-18 03:23:24,683 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) [2022-03-18 03:23:25,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:23:25,022 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2022-03-18 03:23:25,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 03:23:25,023 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 [2022-03-18 03:23:25,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:23:25,024 INFO L225 Difference]: With dead ends: 168 [2022-03-18 03:23:25,024 INFO L226 Difference]: Without dead ends: 156 [2022-03-18 03:23:25,024 INFO L911 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 [2022-03-18 03:23:25,024 INFO L912 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 [2022-03-18 03:23:25,025 INFO L913 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] [2022-03-18 03:23:25,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-18 03:23:25,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2022-03-18 03:23:25,040 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) [2022-03-18 03:23:25,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 176 transitions. [2022-03-18 03:23:25,041 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 176 transitions. Word has length 114 [2022-03-18 03:23:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:23:25,041 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 176 transitions. [2022-03-18 03:23:25,041 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) [2022-03-18 03:23:25,041 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 176 transitions. [2022-03-18 03:23:25,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-18 03:23:25,042 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:23:25,042 INFO L500 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] [2022-03-18 03:23:25,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 03:23:25,251 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 [2022-03-18 03:23:25,251 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:23:25,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:23:25,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 3 times [2022-03-18 03:23:25,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:25,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [91754358] [2022-03-18 03:23:25,252 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:23:25,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 4 times [2022-03-18 03:23:25,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:23:25,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692351338] [2022-03-18 03:23:25,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:23:25,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:23:25,260 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:23:25,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800075267] [2022-03-18 03:23:25,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 03:23:25,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:23:25,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:23:25,262 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:23:25,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 03:23:25,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 03:23:25,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:23:25,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 03:23:25,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:23:26,070 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 03:23:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-03-18 03:23:26,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 03:23:26,240 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 03:23:36,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:23:36,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692351338] [2022-03-18 03:23:36,738 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:23:36,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800075267] [2022-03-18 03:23:36,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800075267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 03:23:36,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 03:23:36,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-18 03:23:36,738 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:23:36,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [91754358] [2022-03-18 03:23:36,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [91754358] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:36,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:36,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 03:23:36,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873740937] [2022-03-18 03:23:36,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:23:36,739 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 03:23:36,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:36,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 03:23:36,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-03-18 03:23:36,739 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) [2022-03-18 03:23:37,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:23:37,754 INFO L93 Difference]: Finished difference Result 161 states and 181 transitions. [2022-03-18 03:23:37,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 03:23:37,755 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 [2022-03-18 03:23:37,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:23:37,756 INFO L225 Difference]: With dead ends: 161 [2022-03-18 03:23:37,756 INFO L226 Difference]: Without dead ends: 124 [2022-03-18 03:23:37,756 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2022-03-18 03:23:37,756 INFO L912 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 [2022-03-18 03:23:37,756 INFO L913 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] [2022-03-18 03:23:37,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-18 03:23:37,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-03-18 03:23:37,765 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) [2022-03-18 03:23:37,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2022-03-18 03:23:37,766 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 116 [2022-03-18 03:23:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:23:37,766 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2022-03-18 03:23:37,766 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) [2022-03-18 03:23:37,766 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2022-03-18 03:23:37,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-18 03:23:37,767 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:23:37,767 INFO L500 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] [2022-03-18 03:23:37,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 03:23:37,974 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 [2022-03-18 03:23:37,974 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:23:37,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:23:37,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1921791003, now seen corresponding path program 5 times [2022-03-18 03:23:37,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:37,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1234500159] [2022-03-18 03:23:37,975 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:23:37,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1921791003, now seen corresponding path program 6 times [2022-03-18 03:23:37,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:23:37,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636191257] [2022-03-18 03:23:37,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:23:37,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:23:37,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:23:37,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345876216] [2022-03-18 03:23:37,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 03:23:37,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:23:37,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:23:37,988 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:23:37,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 03:23:38,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 03:23:38,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:23:38,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 03:23:38,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:23:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2022-03-18 03:23:38,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 03:23:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2022-03-18 03:23:38,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:23:38,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636191257] [2022-03-18 03:23:38,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:23:38,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345876216] [2022-03-18 03:23:38,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345876216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 03:23:38,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 03:23:38,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2022-03-18 03:23:38,550 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:23:38,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1234500159] [2022-03-18 03:23:38,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1234500159] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:23:38,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:23:38,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:23:38,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244332633] [2022-03-18 03:23:38,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:23:38,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 03:23:38,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:38,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 03:23:38,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:23:38,552 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) [2022-03-18 03:23:38,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:23:38,612 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2022-03-18 03:23:38,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 03:23:38,615 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 [2022-03-18 03:23:38,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:23:38,616 INFO L225 Difference]: With dead ends: 150 [2022-03-18 03:23:38,616 INFO L226 Difference]: Without dead ends: 137 [2022-03-18 03:23:38,617 INFO L911 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 [2022-03-18 03:23:38,617 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 20 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 03:23:38,617 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 112 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 03:23:38,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-18 03:23:38,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-18 03:23:38,627 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) [2022-03-18 03:23:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2022-03-18 03:23:38,628 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 120 [2022-03-18 03:23:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:23:38,628 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2022-03-18 03:23:38,628 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) [2022-03-18 03:23:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2022-03-18 03:23:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-18 03:23:38,629 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:23:38,629 INFO L500 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] [2022-03-18 03:23:38,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 03:23:38,841 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 [2022-03-18 03:23:38,843 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:23:38,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:23:38,844 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 13 times [2022-03-18 03:23:38,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:23:38,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1690391877] [2022-03-18 03:23:38,844 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:23:38,844 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 14 times [2022-03-18 03:23:38,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:23:38,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997020457] [2022-03-18 03:23:38,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:23:38,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:23:38,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:23:38,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302256261] [2022-03-18 03:23:38,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:23:38,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:23:38,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:23:38,854 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:23:38,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 03:23:38,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:23:38,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:23:38,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-18 03:23:38,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:23:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 46 proven. 70 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2022-03-18 03:23:39,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 03:24:14,530 WARN L232 SmtUtils]: Spent 7.68s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 03:24:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 46 proven. 70 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2022-03-18 03:24:53,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:24:53,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997020457] [2022-03-18 03:24:53,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:24:53,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302256261] [2022-03-18 03:24:53,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302256261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 03:24:53,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 03:24:53,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-03-18 03:24:53,028 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:24:53,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1690391877] [2022-03-18 03:24:53,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1690391877] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:24:53,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:24:53,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-18 03:24:53,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419509406] [2022-03-18 03:24:53,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:24:53,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 03:24:53,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:24:53,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 03:24:53,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-03-18 03:24:53,029 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-18 03:24:54,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:24:54,040 INFO L93 Difference]: Finished difference Result 241 states and 293 transitions. [2022-03-18 03:24:54,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 03:24:54,041 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 122 [2022-03-18 03:24:54,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:24:54,042 INFO L225 Difference]: With dead ends: 241 [2022-03-18 03:24:54,042 INFO L226 Difference]: Without dead ends: 195 [2022-03-18 03:24:54,042 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2022-03-18 03:24:54,043 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 03:24:54,043 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 518 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 03:24:54,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-18 03:24:54,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2022-03-18 03:24:54,058 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) [2022-03-18 03:24:54,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 227 transitions. [2022-03-18 03:24:54,059 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 227 transitions. Word has length 122 [2022-03-18 03:24:54,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:24:54,059 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 227 transitions. [2022-03-18 03:24:54,060 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-18 03:24:54,060 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 227 transitions. [2022-03-18 03:24:54,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-18 03:24:54,060 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:24:54,061 INFO L500 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] [2022-03-18 03:24:54,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-18 03:24:54,266 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 [2022-03-18 03:24:54,266 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:24:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:24:54,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1224833083, now seen corresponding path program 15 times [2022-03-18 03:24:54,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:24:54,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1217185695] [2022-03-18 03:24:54,267 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:24:54,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1224833083, now seen corresponding path program 16 times [2022-03-18 03:24:54,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:24:54,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490142027] [2022-03-18 03:24:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:24:54,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:24:54,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:24:54,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13679354] [2022-03-18 03:24:54,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 03:24:54,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:24:54,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:24:54,274 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:24:54,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 03:24:54,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 03:24:54,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:24:54,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 03:24:54,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:24:54,730 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-03-18 03:24:54,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 03:25:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-03-18 03:25:09,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:25:09,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490142027] [2022-03-18 03:25:09,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:25:09,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13679354] [2022-03-18 03:25:09,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13679354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 03:25:09,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 03:25:09,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2022-03-18 03:25:09,942 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:25:09,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1217185695] [2022-03-18 03:25:09,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1217185695] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:25:09,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:25:09,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 03:25:09,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336098985] [2022-03-18 03:25:09,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:25:09,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 03:25:09,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:25:09,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 03:25:09,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-03-18 03:25:09,943 INFO L87 Difference]: Start difference. First operand 192 states and 227 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-18 03:25:10,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:25:10,297 INFO L93 Difference]: Finished difference Result 238 states and 285 transitions. [2022-03-18 03:25:10,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 03:25:10,297 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 127 [2022-03-18 03:25:10,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:25:10,298 INFO L225 Difference]: With dead ends: 238 [2022-03-18 03:25:10,298 INFO L226 Difference]: Without dead ends: 209 [2022-03-18 03:25:10,299 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-03-18 03:25:10,299 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 12 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 03:25:10,299 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 574 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 03:25:10,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-18 03:25:10,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2022-03-18 03:25:10,316 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) [2022-03-18 03:25:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 242 transitions. [2022-03-18 03:25:10,317 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 242 transitions. Word has length 127 [2022-03-18 03:25:10,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:25:10,317 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 242 transitions. [2022-03-18 03:25:10,317 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-18 03:25:10,317 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 242 transitions. [2022-03-18 03:25:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-18 03:25:10,318 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:25:10,319 INFO L500 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] [2022-03-18 03:25:10,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 03:25:10,545 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 [2022-03-18 03:25:10,546 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:25:10,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:25:10,546 INFO L85 PathProgramCache]: Analyzing trace with hash -243845479, now seen corresponding path program 17 times [2022-03-18 03:25:10,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:25:10,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [431689540] [2022-03-18 03:25:10,546 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:25:10,546 INFO L85 PathProgramCache]: Analyzing trace with hash -243845479, now seen corresponding path program 18 times [2022-03-18 03:25:10,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:25:10,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17200260] [2022-03-18 03:25:10,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:25:10,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:25:10,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:25:10,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301363384] [2022-03-18 03:25:10,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 03:25:10,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:25:10,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:25:10,560 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:25:10,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 03:25:10,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-18 03:25:10,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:25:10,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-18 03:25:10,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:25:13,193 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful