/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/poly2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 22:28:50,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 22:28:50,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 22:28:50,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 22:28:50,334 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-30 22:28:50,359 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 22:28:50,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 22:28:50,360 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 22:28:50,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 22:28:50,360 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 22:28:50,360 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 22:28:50,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 22:28:50,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 22:28:50,361 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 22:28:50,361 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 22:28:50,362 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 22:28:50,362 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 22:28:50,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 22:28:50,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 22:28:50,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 22:28:50,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 22:28:50,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 22:28:50,363 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 22:28:50,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 22:28:50,363 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 22:28:50,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 22:28:50,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 22:28:50,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 22:28:50,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 22:28:50,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:28:50,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 22:28:50,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 22:28:50,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 22:28:50,365 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 22:28:50,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 22:28:50,365 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 22:28:50,365 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 22:28:50,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 22:28:50,365 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 22:28:50,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 22:28:50,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 22:28:50,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 22:28:50,535 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 22:28:50,535 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 22:28:50,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/poly2.c [2022-01-30 22:28:50,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25b42534f/62031062c7fd4a2b8a0e0df7a0f81adc/FLAG718170b3d [2022-01-30 22:28:50,931 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 22:28:50,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/poly2.c [2022-01-30 22:28:50,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25b42534f/62031062c7fd4a2b8a0e0df7a0f81adc/FLAG718170b3d [2022-01-30 22:28:51,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25b42534f/62031062c7fd4a2b8a0e0df7a0f81adc [2022-01-30 22:28:51,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 22:28:51,389 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 22:28:51,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 22:28:51,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 22:28:51,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 22:28:51,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:28:51" (1/1) ... [2022-01-30 22:28:51,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a2a4450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:51, skipping insertion in model container [2022-01-30 22:28:51,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:28:51" (1/1) ... [2022-01-30 22:28:51,402 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 22:28:51,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 22:28:51,511 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/poly2.c[396,409] [2022-01-30 22:28:51,528 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:28:51,534 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 22:28:51,541 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/poly2.c[396,409] [2022-01-30 22:28:51,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:28:51,555 INFO L208 MainTranslator]: Completed translation [2022-01-30 22:28:51,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:51 WrapperNode [2022-01-30 22:28:51,555 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 22:28:51,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 22:28:51,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 22:28:51,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 22:28:51,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:51" (1/1) ... [2022-01-30 22:28:51,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:51" (1/1) ... [2022-01-30 22:28:51,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:51" (1/1) ... [2022-01-30 22:28:51,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:51" (1/1) ... [2022-01-30 22:28:51,571 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:51" (1/1) ... [2022-01-30 22:28:51,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:51" (1/1) ... [2022-01-30 22:28:51,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:51" (1/1) ... [2022-01-30 22:28:51,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 22:28:51,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 22:28:51,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 22:28:51,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 22:28:51,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:51" (1/1) ... [2022-01-30 22:28:51,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:28:51,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:51,601 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) [2022-01-30 22:28:51,615 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 [2022-01-30 22:28:51,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 22:28:51,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 22:28:51,636 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 22:28:51,636 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-30 22:28:51,636 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 22:28:51,636 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 22:28:51,636 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 22:28:51,636 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 22:28:51,636 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 22:28:51,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 22:28:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-30 22:28:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 22:28:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 22:28:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-30 22:28:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 22:28:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-30 22:28:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 22:28:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 22:28:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 22:28:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 22:28:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 22:28:51,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 22:28:51,684 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 22:28:51,685 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 22:28:51,774 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 22:28:51,778 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 22:28:51,778 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-30 22:28:51,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:28:51 BoogieIcfgContainer [2022-01-30 22:28:51,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 22:28:51,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 22:28:51,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 22:28:51,783 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 22:28:51,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 10:28:51" (1/3) ... [2022-01-30 22:28:51,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75dd6d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:28:51, skipping insertion in model container [2022-01-30 22:28:51,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:28:51" (2/3) ... [2022-01-30 22:28:51,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75dd6d3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:28:51, skipping insertion in model container [2022-01-30 22:28:51,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:28:51" (3/3) ... [2022-01-30 22:28:51,785 INFO L111 eAbstractionObserver]: Analyzing ICFG poly2.c [2022-01-30 22:28:51,788 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 22:28:51,788 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 22:28:51,817 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 22:28:51,821 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 22:28:51,822 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 22:28:51,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:28:51,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-30 22:28:51,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:51,835 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:51,836 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:51,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:51,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1582077252, now seen corresponding path program 1 times [2022-01-30 22:28:51,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:51,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985816847] [2022-01-30 22:28:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:51,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:52,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-30 22:28:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:28:52,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:52,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985816847] [2022-01-30 22:28:52,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985816847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:28:52,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:28:52,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 22:28:52,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021561454] [2022-01-30 22:28:52,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:28:52,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 22:28:52,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:52,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 22:28:52,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 22:28:52,051 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:28:52,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:52,116 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-01-30 22:28:52,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 22:28:52,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-30 22:28:52,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:52,124 INFO L225 Difference]: With dead ends: 49 [2022-01-30 22:28:52,124 INFO L226 Difference]: Without dead ends: 25 [2022-01-30 22:28:52,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-30 22:28:52,128 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:52,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 43 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:28:52,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-30 22:28:52,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-01-30 22:28:52,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:28:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-01-30 22:28:52,150 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2022-01-30 22:28:52,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:52,151 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-01-30 22:28:52,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:28:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-01-30 22:28:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-30 22:28:52,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:52,152 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:52,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-30 22:28:52,152 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:52,153 INFO L85 PathProgramCache]: Analyzing trace with hash -40870430, now seen corresponding path program 1 times [2022-01-30 22:28:52,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:52,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803635350] [2022-01-30 22:28:52,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:52,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:52,167 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:28:52,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899390710] [2022-01-30 22:28:52,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:52,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:52,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:52,169 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) [2022-01-30 22:28:52,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 22:28:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:52,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 22:28:52,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:28:52,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:28:52,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:52,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803635350] [2022-01-30 22:28:52,411 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:28:52,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899390710] [2022-01-30 22:28:52,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899390710] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:52,412 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:28:52,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-01-30 22:28:52,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875626849] [2022-01-30 22:28:52,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:52,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-30 22:28:52,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:52,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-30 22:28:52,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:28:52,414 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:28:52,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:52,447 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2022-01-30 22:28:52,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-30 22:28:52,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-30 22:28:52,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:52,448 INFO L225 Difference]: With dead ends: 41 [2022-01-30 22:28:52,448 INFO L226 Difference]: Without dead ends: 27 [2022-01-30 22:28:52,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:28:52,449 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:52,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:28:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-30 22:28:52,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-01-30 22:28:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:28:52,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-01-30 22:28:52,453 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2022-01-30 22:28:52,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:52,454 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-01-30 22:28:52,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:28:52,454 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-01-30 22:28:52,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 22:28:52,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:52,454 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:52,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-30 22:28:52,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:52,672 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:52,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:52,672 INFO L85 PathProgramCache]: Analyzing trace with hash -620464384, now seen corresponding path program 2 times [2022-01-30 22:28:52,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:52,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092275994] [2022-01-30 22:28:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:52,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:52,683 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:28:52,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1729278346] [2022-01-30 22:28:52,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:28:52,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:52,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:52,691 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) [2022-01-30 22:28:52,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 22:28:52,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-30 22:28:52,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:28:52,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 22:28:52,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-30 22:28:52,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:28:52,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:52,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092275994] [2022-01-30 22:28:52,778 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:28:52,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729278346] [2022-01-30 22:28:52,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729278346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:28:52,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:28:52,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 22:28:52,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788847915] [2022-01-30 22:28:52,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:28:52,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 22:28:52,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:52,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 22:28:52,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 22:28:52,779 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:28:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:52,805 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-01-30 22:28:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 22:28:52,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-30 22:28:52,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:52,806 INFO L225 Difference]: With dead ends: 43 [2022-01-30 22:28:52,807 INFO L226 Difference]: Without dead ends: 32 [2022-01-30 22:28:52,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 22:28:52,808 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:52,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 31 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:28:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-30 22:28:52,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-01-30 22:28:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:28:52,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-01-30 22:28:52,814 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2022-01-30 22:28:52,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:52,814 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-01-30 22:28:52,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:28:52,815 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-01-30 22:28:52,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-30 22:28:52,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:52,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:52,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 22:28:53,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-30 22:28:53,031 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:53,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:53,032 INFO L85 PathProgramCache]: Analyzing trace with hash 642109534, now seen corresponding path program 1 times [2022-01-30 22:28:53,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:53,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867059128] [2022-01-30 22:28:53,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:53,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:53,044 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:28:53,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114488164] [2022-01-30 22:28:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:53,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:53,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:53,062 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) [2022-01-30 22:28:53,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 22:28:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:28:53,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 22:28:53,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:53,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-30 22:28:53,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-30 22:28:53,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:53,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867059128] [2022-01-30 22:28:53,247 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:28:53,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114488164] [2022-01-30 22:28:53,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114488164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:53,247 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:28:53,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-01-30 22:28:53,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349686875] [2022-01-30 22:28:53,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:53,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-30 22:28:53,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:53,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-30 22:28:53,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-30 22:28:53,251 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:28:53,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:53,319 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2022-01-30 22:28:53,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-30 22:28:53,320 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-30 22:28:53,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:53,323 INFO L225 Difference]: With dead ends: 50 [2022-01-30 22:28:53,323 INFO L226 Difference]: Without dead ends: 39 [2022-01-30 22:28:53,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-30 22:28:53,331 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:53,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 31 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:28:53,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-30 22:28:53,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-01-30 22:28:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:28:53,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-01-30 22:28:53,336 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2022-01-30 22:28:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:53,336 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-01-30 22:28:53,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:28:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-01-30 22:28:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-30 22:28:53,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:53,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:53,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 22:28:53,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:53,552 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:53,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:53,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1500100036, now seen corresponding path program 2 times [2022-01-30 22:28:53,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:53,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999690053] [2022-01-30 22:28:53,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:53,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:53,567 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:28:53,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1356073212] [2022-01-30 22:28:53,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:28:53,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:53,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:53,568 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) [2022-01-30 22:28:53,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 22:28:53,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:28:53,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:28:53,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-30 22:28:53,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:53,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-01-30 22:28:53,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:28:53,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-30 22:28:53,782 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-01-30 22:28:53,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-01-30 22:28:53,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 101 [2022-01-30 22:28:53,871 INFO L353 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2022-01-30 22:28:53,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 102 [2022-01-30 22:28:53,912 INFO L353 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-01-30 22:28:53,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 26 [2022-01-30 22:28:53,954 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-01-30 22:28:53,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:28:53,989 INFO L353 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-01-30 22:28:53,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 30 [2022-01-30 22:28:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:28:54,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:54,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-01-30 22:28:54,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-30 22:28:54,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-30 22:28:54,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 56 [2022-01-30 22:28:54,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-30 22:28:54,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2022-01-30 22:28:54,477 INFO L353 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2022-01-30 22:28:54,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 74 [2022-01-30 22:28:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:28:54,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:54,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999690053] [2022-01-30 22:28:54,537 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:28:54,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356073212] [2022-01-30 22:28:54,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356073212] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:54,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:28:54,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 19 [2022-01-30 22:28:54,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697347015] [2022-01-30 22:28:54,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:54,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-30 22:28:54,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:54,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-30 22:28:54,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-01-30 22:28:54,539 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:28:54,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:54,687 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2022-01-30 22:28:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-30 22:28:54,689 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-30 22:28:54,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:54,689 INFO L225 Difference]: With dead ends: 62 [2022-01-30 22:28:54,689 INFO L226 Difference]: Without dead ends: 60 [2022-01-30 22:28:54,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-30 22:28:54,690 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:54,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 166 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 153 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2022-01-30 22:28:54,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-30 22:28:54,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2022-01-30 22:28:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:28:54,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-01-30 22:28:54,698 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 24 [2022-01-30 22:28:54,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:54,698 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-01-30 22:28:54,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:28:54,698 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-01-30 22:28:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-30 22:28:54,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:54,699 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:54,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 22:28:54,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:54,928 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:54,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1271829722, now seen corresponding path program 3 times [2022-01-30 22:28:54,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:54,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938350783] [2022-01-30 22:28:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:54,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:54,937 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:28:54,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511550734] [2022-01-30 22:28:54,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:28:54,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:54,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:54,939 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) [2022-01-30 22:28:54,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 22:28:55,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-30 22:28:55,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:28:55,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-30 22:28:55,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:28:55,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:55,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:28:55,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938350783] [2022-01-30 22:28:55,179 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:28:55,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511550734] [2022-01-30 22:28:55,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511550734] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:55,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:28:55,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-30 22:28:55,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584728561] [2022-01-30 22:28:55,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:55,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-30 22:28:55,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:55,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-30 22:28:55,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-30 22:28:55,180 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:28:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:55,357 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2022-01-30 22:28:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-30 22:28:55,358 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-30 22:28:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:55,359 INFO L225 Difference]: With dead ends: 92 [2022-01-30 22:28:55,359 INFO L226 Difference]: Without dead ends: 81 [2022-01-30 22:28:55,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-01-30 22:28:55,360 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 42 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:55,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 145 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:28:55,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-30 22:28:55,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2022-01-30 22:28:55,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.15) internal successors, (46), 41 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:28:55,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-01-30 22:28:55,367 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 26 [2022-01-30 22:28:55,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:55,367 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-01-30 22:28:55,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:28:55,367 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-01-30 22:28:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-30 22:28:55,368 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:55,368 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:55,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 22:28:55,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:55,598 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:55,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:55,599 INFO L85 PathProgramCache]: Analyzing trace with hash -497803400, now seen corresponding path program 4 times [2022-01-30 22:28:55,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:55,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828317526] [2022-01-30 22:28:55,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:55,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:55,609 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:28:55,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690692481] [2022-01-30 22:28:55,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:28:55,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:55,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:55,610 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) [2022-01-30 22:28:55,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 22:28:55,667 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:28:55,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:28:55,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-30 22:28:55,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:28:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-30 22:28:55,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:28:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-30 22:28:55,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:28:55,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828317526] [2022-01-30 22:28:55,788 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:28:55,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690692481] [2022-01-30 22:28:55,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690692481] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:28:55,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:28:55,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-30 22:28:55,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750175676] [2022-01-30 22:28:55,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:28:55,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-30 22:28:55,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:28:55,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-30 22:28:55,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-30 22:28:55,789 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:28:55,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:28:55,887 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2022-01-30 22:28:55,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-30 22:28:55,887 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-30 22:28:55,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:28:55,888 INFO L225 Difference]: With dead ends: 95 [2022-01-30 22:28:55,888 INFO L226 Difference]: Without dead ends: 68 [2022-01-30 22:28:55,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-01-30 22:28:55,889 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 69 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:28:55,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 72 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:28:55,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-30 22:28:55,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2022-01-30 22:28:55,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:28:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-01-30 22:28:55,895 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 28 [2022-01-30 22:28:55,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:28:55,895 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-01-30 22:28:55,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:28:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-01-30 22:28:55,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-30 22:28:55,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:28:55,896 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:28:55,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 22:28:56,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:56,113 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:28:56,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:28:56,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1929388104, now seen corresponding path program 5 times [2022-01-30 22:28:56,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:28:56,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655914868] [2022-01-30 22:28:56,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:28:56,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:28:56,121 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:28:56,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391401577] [2022-01-30 22:28:56,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:28:56,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:28:56,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:28:56,123 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) [2022-01-30 22:28:56,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 22:29:01,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-30 22:29:01,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:29:01,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-30 22:29:01,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:01,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-01-30 22:29:01,771 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:29:01,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-30 22:29:01,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 66 [2022-01-30 22:29:01,821 INFO L353 Elim1Store]: treesize reduction 102, result has 20.9 percent of original size [2022-01-30 22:29:01,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 85 [2022-01-30 22:29:01,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:01,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 36 [2022-01-30 22:29:01,881 INFO L353 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2022-01-30 22:29:01,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2022-01-30 22:29:01,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 98 [2022-01-30 22:29:02,004 INFO L353 Elim1Store]: treesize reduction 313, result has 11.6 percent of original size [2022-01-30 22:29:02,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 97 treesize of output 118 [2022-01-30 22:29:02,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:02,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:02,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:02,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 35 [2022-01-30 22:29:02,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2022-01-30 22:29:02,098 INFO L353 Elim1Store]: treesize reduction 193, result has 15.0 percent of original size [2022-01-30 22:29:02,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 66 treesize of output 89 [2022-01-30 22:29:02,115 INFO L353 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2022-01-30 22:29:02,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 37 [2022-01-30 22:29:02,155 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-01-30 22:29:02,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:29:02,197 INFO L353 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2022-01-30 22:29:02,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 27 [2022-01-30 22:29:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:29:02,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:29:07,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-01-30 22:29:07,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-30 22:29:07,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 56 [2022-01-30 22:29:07,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-30 22:29:07,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2022-01-30 22:29:07,573 INFO L353 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2022-01-30 22:29:07,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 535 treesize of output 524 [2022-01-30 22:29:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:29:08,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:08,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655914868] [2022-01-30 22:29:08,025 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:29:08,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391401577] [2022-01-30 22:29:08,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391401577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:29:08,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:29:08,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2022-01-30 22:29:08,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369337159] [2022-01-30 22:29:08,025 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:29:08,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-30 22:29:08,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:29:08,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-30 22:29:08,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=736, Unknown=2, NotChecked=0, Total=870 [2022-01-30 22:29:08,026 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 30 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 29 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:29:08,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:29:08,272 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2022-01-30 22:29:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 22:29:08,272 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 29 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-30 22:29:08,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:29:08,273 INFO L225 Difference]: With dead ends: 86 [2022-01-30 22:29:08,273 INFO L226 Difference]: Without dead ends: 84 [2022-01-30 22:29:08,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=169, Invalid=1019, Unknown=2, NotChecked=0, Total=1190 [2022-01-30 22:29:08,274 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:29:08,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 203 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 172 Invalid, 0 Unknown, 153 Unchecked, 0.1s Time] [2022-01-30 22:29:08,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-30 22:29:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2022-01-30 22:29:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 71 states have internal predecessors, (79), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:29:08,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2022-01-30 22:29:08,282 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 28 [2022-01-30 22:29:08,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:29:08,282 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2022-01-30 22:29:08,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 29 states have internal predecessors, (39), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:29:08,282 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2022-01-30 22:29:08,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-30 22:29:08,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:29:08,283 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:29:08,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-30 22:29:08,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:08,492 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:29:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:29:08,492 INFO L85 PathProgramCache]: Analyzing trace with hash -652335245, now seen corresponding path program 1 times [2022-01-30 22:29:08,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:29:08,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651092105] [2022-01-30 22:29:08,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:08,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:29:08,507 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:29:08,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950562536] [2022-01-30 22:29:08,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:08,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:08,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:08,510 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) [2022-01-30 22:29:08,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 22:29:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:08,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-30 22:29:08,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:08,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-30 22:29:08,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-01-30 22:29:08,648 INFO L353 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2022-01-30 22:29:08,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 65 [2022-01-30 22:29:08,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:08,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2022-01-30 22:29:08,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-01-30 22:29:08,790 INFO L353 Elim1Store]: treesize reduction 52, result has 5.5 percent of original size [2022-01-30 22:29:08,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 27 [2022-01-30 22:29:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:29:08,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:29:09,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-01-30 22:29:09,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-30 22:29:09,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 56 [2022-01-30 22:29:09,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2022-01-30 22:29:09,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-30 22:29:09,318 INFO L353 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2022-01-30 22:29:09,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 46 [2022-01-30 22:29:09,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:29:09,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:09,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651092105] [2022-01-30 22:29:09,407 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:29:09,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950562536] [2022-01-30 22:29:09,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950562536] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:29:09,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:29:09,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2022-01-30 22:29:09,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715169637] [2022-01-30 22:29:09,408 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:29:09,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-30 22:29:09,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:29:09,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-30 22:29:09,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-30 22:29:09,409 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:29:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:29:09,691 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2022-01-30 22:29:09,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-30 22:29:09,691 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-01-30 22:29:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:29:09,692 INFO L225 Difference]: With dead ends: 91 [2022-01-30 22:29:09,692 INFO L226 Difference]: Without dead ends: 70 [2022-01-30 22:29:09,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-30 22:29:09,693 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:29:09,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 213 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 212 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-01-30 22:29:09,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-30 22:29:09,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2022-01-30 22:29:09,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:29:09,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2022-01-30 22:29:09,699 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 32 [2022-01-30 22:29:09,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:29:09,699 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2022-01-30 22:29:09,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 19 states have internal predecessors, (38), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:29:09,699 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2022-01-30 22:29:09,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-30 22:29:09,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:29:09,700 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:29:09,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 22:29:09,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-30 22:29:09,911 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:29:09,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:29:09,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1434142516, now seen corresponding path program 6 times [2022-01-30 22:29:09,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:29:09,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93761641] [2022-01-30 22:29:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:09,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:29:09,926 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:29:09,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207147185] [2022-01-30 22:29:09,926 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 22:29:09,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:09,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:09,933 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) [2022-01-30 22:29:09,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 22:29:10,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-30 22:29:10,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:29:10,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-30 22:29:10,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:10,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-01-30 22:29:10,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:29:10,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-30 22:29:10,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-30 22:29:10,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-30 22:29:10,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2022-01-30 22:29:10,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-30 22:29:10,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-30 22:29:10,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2022-01-30 22:29:10,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-30 22:29:10,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 101 [2022-01-30 22:29:10,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 102 [2022-01-30 22:29:10,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 26 [2022-01-30 22:29:10,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-30 22:29:10,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-30 22:29:10,520 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:29:10,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2022-01-30 22:29:10,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-30 22:29:10,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-30 22:29:10,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2022-01-30 22:29:10,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-30 22:29:10,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-30 22:29:10,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2022-01-30 22:29:10,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-30 22:29:10,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:10,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-30 22:29:10,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 27 [2022-01-30 22:29:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:29:10,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:29:11,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-01-30 22:29:11,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-30 22:29:11,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-30 22:29:11,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 56 [2022-01-30 22:29:12,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2022-01-30 22:29:12,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-30 22:29:12,137 INFO L353 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2022-01-30 22:29:12,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2461 treesize of output 2440 [2022-01-30 22:29:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:29:12,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:12,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93761641] [2022-01-30 22:29:12,573 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:29:12,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207147185] [2022-01-30 22:29:12,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207147185] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:29:12,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:29:12,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24] total 40 [2022-01-30 22:29:12,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054276619] [2022-01-30 22:29:12,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:29:12,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-30 22:29:12,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:29:12,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-30 22:29:12,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2022-01-30 22:29:12,575 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 40 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 39 states have internal predecessors, (51), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:29:13,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:29:13,845 INFO L93 Difference]: Finished difference Result 127 states and 146 transitions. [2022-01-30 22:29:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-30 22:29:13,845 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 39 states have internal predecessors, (51), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-30 22:29:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:29:13,846 INFO L225 Difference]: With dead ends: 127 [2022-01-30 22:29:13,846 INFO L226 Difference]: Without dead ends: 125 [2022-01-30 22:29:13,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=570, Invalid=3720, Unknown=0, NotChecked=0, Total=4290 [2022-01-30 22:29:13,848 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 85 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 512 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:29:13,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 183 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 350 Invalid, 0 Unknown, 512 Unchecked, 0.2s Time] [2022-01-30 22:29:13,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-30 22:29:13,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 70. [2022-01-30 22:29:13,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 63 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:29:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-01-30 22:29:13,858 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 32 [2022-01-30 22:29:13,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:29:13,858 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-01-30 22:29:13,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 39 states have internal predecessors, (51), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:29:13,858 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-01-30 22:29:13,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-30 22:29:13,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:29:13,859 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-30 22:29:13,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-30 22:29:14,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-30 22:29:14,077 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:29:14,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:29:14,077 INFO L85 PathProgramCache]: Analyzing trace with hash -330792721, now seen corresponding path program 2 times [2022-01-30 22:29:14,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:29:14,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327801403] [2022-01-30 22:29:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:14,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:29:14,084 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:29:14,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180194224] [2022-01-30 22:29:14,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:29:14,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:14,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:14,085 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) [2022-01-30 22:29:14,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-30 22:29:14,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:29:14,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:29:14,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-30 22:29:14,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:14,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-01-30 22:29:14,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-30 22:29:14,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:29:14,254 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:29:14,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:29:14,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-01-30 22:29:14,296 INFO L353 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2022-01-30 22:29:14,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 65 [2022-01-30 22:29:14,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:29:14,321 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-30 22:29:14,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 26 [2022-01-30 22:29:14,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 101 [2022-01-30 22:29:14,354 INFO L353 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2022-01-30 22:29:14,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 102 [2022-01-30 22:29:14,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:14,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2022-01-30 22:29:14,420 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:29:14,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:29:14,537 INFO L353 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-01-30 22:29:14,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 26 [2022-01-30 22:29:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:29:14,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:29:15,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-01-30 22:29:15,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-30 22:29:15,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-30 22:29:15,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 56 [2022-01-30 22:29:15,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2022-01-30 22:29:15,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-30 22:29:15,466 INFO L353 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2022-01-30 22:29:15,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 78 [2022-01-30 22:29:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:29:15,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:15,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327801403] [2022-01-30 22:29:15,574 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:29:15,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180194224] [2022-01-30 22:29:15,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180194224] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:29:15,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:29:15,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2022-01-30 22:29:15,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365300947] [2022-01-30 22:29:15,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:29:15,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 22:29:15,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:29:15,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 22:29:15,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-30 22:29:15,575 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:29:15,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:29:15,947 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2022-01-30 22:29:15,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-30 22:29:15,955 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2022-01-30 22:29:15,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:29:15,956 INFO L225 Difference]: With dead ends: 97 [2022-01-30 22:29:15,956 INFO L226 Difference]: Without dead ends: 95 [2022-01-30 22:29:15,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-01-30 22:29:15,957 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 19 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:29:15,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 287 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 273 Invalid, 0 Unknown, 138 Unchecked, 0.2s Time] [2022-01-30 22:29:15,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-30 22:29:15,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2022-01-30 22:29:15,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.173913043478261) internal successors, (81), 70 states have internal predecessors, (81), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:29:15,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2022-01-30 22:29:15,982 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 36 [2022-01-30 22:29:15,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:29:15,982 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2022-01-30 22:29:15,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:29:15,982 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2022-01-30 22:29:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-30 22:29:15,987 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:29:15,987 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:29:16,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-30 22:29:16,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-30 22:29:16,204 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:29:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:29:16,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1582530736, now seen corresponding path program 7 times [2022-01-30 22:29:16,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:29:16,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244959563] [2022-01-30 22:29:16,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:16,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:29:16,212 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:29:16,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737915653] [2022-01-30 22:29:16,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-30 22:29:16,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:16,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:16,223 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) [2022-01-30 22:29:16,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-30 22:29:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:29:16,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-30 22:29:16,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:16,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-01-30 22:29:16,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:29:16,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-30 22:29:16,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 66 [2022-01-30 22:29:16,530 INFO L353 Elim1Store]: treesize reduction 102, result has 20.9 percent of original size [2022-01-30 22:29:16,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 85 [2022-01-30 22:29:16,547 INFO L353 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2022-01-30 22:29:16,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 40 [2022-01-30 22:29:16,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 66 [2022-01-30 22:29:16,584 INFO L353 Elim1Store]: treesize reduction 102, result has 20.9 percent of original size [2022-01-30 22:29:16,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 85 [2022-01-30 22:29:16,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:29:16,602 INFO L353 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2022-01-30 22:29:16,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 40 [2022-01-30 22:29:16,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-30 22:29:16,633 INFO L353 Elim1Store]: treesize reduction 54, result has 16.9 percent of original size [2022-01-30 22:29:16,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 61 [2022-01-30 22:29:16,647 INFO L353 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-01-30 22:29:16,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 24 [2022-01-30 22:29:16,667 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-01-30 22:29:16,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-01-30 22:29:16,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 101 [2022-01-30 22:29:16,708 INFO L353 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2022-01-30 22:29:16,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 102 [2022-01-30 22:29:16,726 INFO L353 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-01-30 22:29:16,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2022-01-30 22:29:16,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 68 [2022-01-30 22:29:16,775 INFO L353 Elim1Store]: treesize reduction 102, result has 20.9 percent of original size [2022-01-30 22:29:16,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 87 [2022-01-30 22:29:16,792 INFO L353 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2022-01-30 22:29:16,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 42 [2022-01-30 22:29:16,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-01-30 22:29:16,837 INFO L353 Elim1Store]: treesize reduction 54, result has 16.9 percent of original size [2022-01-30 22:29:16,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 63 [2022-01-30 22:29:16,851 INFO L353 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-01-30 22:29:16,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2022-01-30 22:29:16,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-01-30 22:29:16,888 INFO L353 Elim1Store]: treesize reduction 54, result has 16.9 percent of original size [2022-01-30 22:29:16,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 63 [2022-01-30 22:29:16,902 INFO L353 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2022-01-30 22:29:16,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2022-01-30 22:29:16,927 INFO L353 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-01-30 22:29:16,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:29:16,987 INFO L353 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-01-30 22:29:16,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 30 [2022-01-30 22:29:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:29:17,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:29:18,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-01-30 22:29:18,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-30 22:29:18,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-30 22:29:18,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 56 [2022-01-30 22:29:18,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-30 22:29:19,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2022-01-30 22:29:19,194 INFO L353 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2022-01-30 22:29:19,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 953 treesize of output 944 [2022-01-30 22:29:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:29:19,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:19,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244959563] [2022-01-30 22:29:19,507 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:29:19,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737915653] [2022-01-30 22:29:19,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737915653] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:29:19,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:29:19,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 37 [2022-01-30 22:29:19,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616058164] [2022-01-30 22:29:19,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:29:19,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-30 22:29:19,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:29:19,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-30 22:29:19,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-01-30 22:29:19,508 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 37 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 36 states have internal predecessors, (53), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:29:19,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:29:19,753 INFO L93 Difference]: Finished difference Result 136 states and 158 transitions. [2022-01-30 22:29:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-30 22:29:19,753 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 36 states have internal predecessors, (53), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-30 22:29:19,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:29:19,754 INFO L225 Difference]: With dead ends: 136 [2022-01-30 22:29:19,754 INFO L226 Difference]: Without dead ends: 134 [2022-01-30 22:29:19,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=231, Invalid=1251, Unknown=0, NotChecked=0, Total=1482 [2022-01-30 22:29:19,755 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:29:19,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 192 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 215 Invalid, 0 Unknown, 167 Unchecked, 0.1s Time] [2022-01-30 22:29:19,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-30 22:29:19,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 93. [2022-01-30 22:29:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 83 states have (on average 1.2289156626506024) internal successors, (102), 84 states have internal predecessors, (102), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:29:19,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2022-01-30 22:29:19,766 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 36 [2022-01-30 22:29:19,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:29:19,766 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2022-01-30 22:29:19,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 36 states have internal predecessors, (53), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:29:19,766 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2022-01-30 22:29:19,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-30 22:29:19,766 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:29:19,767 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:29:19,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-30 22:29:19,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-30 22:29:19,983 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:29:19,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:29:19,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1751503701, now seen corresponding path program 3 times [2022-01-30 22:29:19,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:29:19,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462341563] [2022-01-30 22:29:19,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:19,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:29:19,991 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:29:19,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922452163] [2022-01-30 22:29:19,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:29:19,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:19,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:19,992 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) [2022-01-30 22:29:19,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-30 22:29:20,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-30 22:29:20,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:29:20,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 46 conjunts are in the unsatisfiable core [2022-01-30 22:29:20,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:20,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-01-30 22:29:20,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-01-30 22:29:20,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-30 22:29:20,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 106 [2022-01-30 22:29:20,348 INFO L353 Elim1Store]: treesize reduction 235, result has 19.0 percent of original size [2022-01-30 22:29:20,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 105 treesize of output 142 [2022-01-30 22:29:20,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:20,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:20,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:20,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 39 [2022-01-30 22:29:20,419 INFO L353 Elim1Store]: treesize reduction 70, result has 1.4 percent of original size [2022-01-30 22:29:20,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 57 [2022-01-30 22:29:20,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:20,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:20,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:29:20,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 57 [2022-01-30 22:29:20,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 77 [2022-01-30 22:29:20,797 INFO L353 Elim1Store]: treesize reduction 78, result has 31.0 percent of original size [2022-01-30 22:29:20,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 106 [2022-01-30 22:29:20,826 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:29:20,855 INFO L353 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-01-30 22:29:20,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 78 [2022-01-30 22:29:24,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 129 [2022-01-30 22:29:24,255 INFO L353 Elim1Store]: treesize reduction 233, result has 19.9 percent of original size [2022-01-30 22:29:24,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 128 treesize of output 164 [2022-01-30 22:29:24,347 INFO L353 Elim1Store]: treesize reduction 47, result has 25.4 percent of original size [2022-01-30 22:29:24,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 105 [2022-01-30 22:29:26,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 237 treesize of output 228 [2022-01-30 22:29:26,649 INFO L353 Elim1Store]: treesize reduction 160, result has 23.4 percent of original size [2022-01-30 22:29:26,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 227 treesize of output 267 [2022-01-30 22:29:27,160 INFO L353 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-01-30 22:29:27,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 244 treesize of output 211 [2022-01-30 22:29:30,908 INFO L353 Elim1Store]: treesize reduction 52, result has 5.5 percent of original size [2022-01-30 22:29:30,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 50 [2022-01-30 22:29:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-30 22:29:31,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:29:32,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-01-30 22:29:32,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-30 22:29:32,700 INFO L353 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-01-30 22:29:32,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 1 [2022-01-30 22:29:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-01-30 22:29:32,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:32,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462341563] [2022-01-30 22:29:32,719 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:29:32,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922452163] [2022-01-30 22:29:32,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922452163] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:29:32,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:29:32,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20] total 40 [2022-01-30 22:29:32,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69076626] [2022-01-30 22:29:32,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:29:32,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-30 22:29:32,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:29:32,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-30 22:29:32,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1344, Unknown=2, NotChecked=0, Total=1560 [2022-01-30 22:29:32,720 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 40 states, 38 states have (on average 1.5) internal successors, (57), 39 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:29:35,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:29:35,123 INFO L93 Difference]: Finished difference Result 136 states and 155 transitions. [2022-01-30 22:29:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-30 22:29:35,124 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.5) internal successors, (57), 39 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2022-01-30 22:29:35,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:29:35,125 INFO L225 Difference]: With dead ends: 136 [2022-01-30 22:29:35,125 INFO L226 Difference]: Without dead ends: 134 [2022-01-30 22:29:35,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=267, Invalid=1711, Unknown=2, NotChecked=0, Total=1980 [2022-01-30 22:29:35,126 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:29:35,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 319 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2022-01-30 22:29:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-30 22:29:35,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 102. [2022-01-30 22:29:35,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 90 states have (on average 1.2333333333333334) internal successors, (111), 92 states have internal predecessors, (111), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:29:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 122 transitions. [2022-01-30 22:29:35,149 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 122 transitions. Word has length 40 [2022-01-30 22:29:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:29:35,149 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 122 transitions. [2022-01-30 22:29:35,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.5) internal successors, (57), 39 states have internal predecessors, (57), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:29:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 122 transitions. [2022-01-30 22:29:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-30 22:29:35,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:29:35,151 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:29:35,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-30 22:29:35,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-30 22:29:35,369 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:29:35,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:29:35,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1661836524, now seen corresponding path program 8 times [2022-01-30 22:29:35,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:29:35,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702926180] [2022-01-30 22:29:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:35,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:29:35,389 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:29:35,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162289212] [2022-01-30 22:29:35,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:29:35,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:35,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:35,391 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) [2022-01-30 22:29:35,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-30 22:29:35,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:29:35,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:29:35,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-30 22:29:35,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 64 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:29:35,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:29:35,738 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 64 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:29:35,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:35,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702926180] [2022-01-30 22:29:35,738 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:29:35,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162289212] [2022-01-30 22:29:35,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162289212] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:29:35,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:29:35,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2022-01-30 22:29:35,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499529955] [2022-01-30 22:29:35,738 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:29:35,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 22:29:35,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:29:35,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 22:29:35,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2022-01-30 22:29:35,739 INFO L87 Difference]: Start difference. First operand 102 states and 122 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:29:36,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:29:36,445 INFO L93 Difference]: Finished difference Result 259 states and 299 transitions. [2022-01-30 22:29:36,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-30 22:29:36,445 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-30 22:29:36,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:29:36,446 INFO L225 Difference]: With dead ends: 259 [2022-01-30 22:29:36,446 INFO L226 Difference]: Without dead ends: 226 [2022-01-30 22:29:36,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=733, Invalid=2023, Unknown=0, NotChecked=0, Total=2756 [2022-01-30 22:29:36,448 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 128 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-30 22:29:36,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 242 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-30 22:29:36,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-30 22:29:36,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 111. [2022-01-30 22:29:36,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 101 states have (on average 1.1782178217821782) internal successors, (119), 102 states have internal predecessors, (119), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:29:36,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2022-01-30 22:29:36,466 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 40 [2022-01-30 22:29:36,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:29:36,467 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2022-01-30 22:29:36,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:29:36,467 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2022-01-30 22:29:36,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-30 22:29:36,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:29:36,467 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:29:36,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-30 22:29:36,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-30 22:29:36,683 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:29:36,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:29:36,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1138240137, now seen corresponding path program 4 times [2022-01-30 22:29:36,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:29:36,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999093167] [2022-01-30 22:29:36,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:36,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:29:36,695 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:29:36,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333510490] [2022-01-30 22:29:36,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:29:36,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:36,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:36,696 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) [2022-01-30 22:29:36,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-30 22:29:36,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:29:36,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:29:36,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-30 22:29:36,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:29:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-30 22:29:36,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:29:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-30 22:29:36,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:29:36,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999093167] [2022-01-30 22:29:36,985 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:29:36,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333510490] [2022-01-30 22:29:36,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333510490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:29:36,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:29:36,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-01-30 22:29:36,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615311209] [2022-01-30 22:29:36,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:29:36,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-30 22:29:36,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:29:36,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-30 22:29:36,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-30 22:29:36,986 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 22:29:37,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:29:37,165 INFO L93 Difference]: Finished difference Result 198 states and 227 transitions. [2022-01-30 22:29:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-30 22:29:37,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-01-30 22:29:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:29:37,166 INFO L225 Difference]: With dead ends: 198 [2022-01-30 22:29:37,166 INFO L226 Difference]: Without dead ends: 152 [2022-01-30 22:29:37,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-01-30 22:29:37,167 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 76 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:29:37,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 103 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:29:37,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-30 22:29:37,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 132. [2022-01-30 22:29:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 117 states have (on average 1.1452991452991452) internal successors, (134), 118 states have internal predecessors, (134), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-30 22:29:37,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 148 transitions. [2022-01-30 22:29:37,186 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 148 transitions. Word has length 42 [2022-01-30 22:29:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:29:37,186 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 148 transitions. [2022-01-30 22:29:37,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 22:29:37,186 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 148 transitions. [2022-01-30 22:29:37,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-30 22:29:37,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:29:37,187 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:29:37,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-30 22:29:37,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:37,388 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:29:37,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:29:37,389 INFO L85 PathProgramCache]: Analyzing trace with hash 2077096713, now seen corresponding path program 5 times [2022-01-30 22:29:37,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:29:37,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185173570] [2022-01-30 22:29:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:29:37,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:29:37,397 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:29:37,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61231987] [2022-01-30 22:29:37,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:29:37,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:29:37,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:29:37,398 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) [2022-01-30 22:29:37,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-30 22:30:11,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-30 22:30:11,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:30:11,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 22:30:11,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:30:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-30 22:30:11,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:30:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-30 22:30:11,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:30:11,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185173570] [2022-01-30 22:30:11,240 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:30:11,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61231987] [2022-01-30 22:30:11,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61231987] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:30:11,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:30:11,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-01-30 22:30:11,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575658148] [2022-01-30 22:30:11,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:30:11,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-30 22:30:11,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:30:11,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-30 22:30:11,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-01-30 22:30:11,241 INFO L87 Difference]: Start difference. First operand 132 states and 148 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 22:30:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:30:11,546 INFO L93 Difference]: Finished difference Result 203 states and 226 transitions. [2022-01-30 22:30:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-30 22:30:11,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-01-30 22:30:11,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:30:11,553 INFO L225 Difference]: With dead ends: 203 [2022-01-30 22:30:11,554 INFO L226 Difference]: Without dead ends: 186 [2022-01-30 22:30:11,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-01-30 22:30:11,555 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 72 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:30:11,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 195 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 22:30:11,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-30 22:30:11,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 132. [2022-01-30 22:30:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 118 states have internal predecessors, (133), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-30 22:30:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 147 transitions. [2022-01-30 22:30:11,577 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 147 transitions. Word has length 42 [2022-01-30 22:30:11,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:30:11,577 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 147 transitions. [2022-01-30 22:30:11,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 22:30:11,577 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 147 transitions. [2022-01-30 22:30:11,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-30 22:30:11,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:30:11,577 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-01-30 22:30:11,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-30 22:30:11,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-30 22:30:11,791 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:30:11,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:30:11,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1746139942, now seen corresponding path program 6 times [2022-01-30 22:30:11,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:30:11,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140245193] [2022-01-30 22:30:11,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:30:11,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:30:11,796 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:30:11,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923680868] [2022-01-30 22:30:11,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 22:30:11,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:30:11,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:30:11,797 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) [2022-01-30 22:30:11,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-30 22:30:11,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-30 22:30:11,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:30:11,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 40 conjunts are in the unsatisfiable core [2022-01-30 22:30:11,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:30:11,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-30 22:30:11,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-01-30 22:30:11,998 INFO L353 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2022-01-30 22:30:11,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 65 [2022-01-30 22:30:12,016 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:30:12,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:30:12,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2022-01-30 22:30:12,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-01-30 22:30:12,093 INFO L353 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2022-01-30 22:30:12,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 65 [2022-01-30 22:30:12,102 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:30:12,112 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-30 22:30:12,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 26 [2022-01-30 22:30:12,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 93 [2022-01-30 22:30:12,165 INFO L353 Elim1Store]: treesize reduction 224, result has 10.8 percent of original size [2022-01-30 22:30:12,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 92 treesize of output 101 [2022-01-30 22:30:12,186 INFO L353 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-01-30 22:30:12,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 22 [2022-01-30 22:30:12,355 INFO L353 Elim1Store]: treesize reduction 52, result has 5.5 percent of original size [2022-01-30 22:30:12,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 27 [2022-01-30 22:30:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-30 22:30:12,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:30:13,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-01-30 22:30:13,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-30 22:30:13,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 56 [2022-01-30 22:30:13,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2022-01-30 22:30:13,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-30 22:30:13,289 INFO L353 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2022-01-30 22:30:13,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 112 [2022-01-30 22:30:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-30 22:30:13,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:30:13,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140245193] [2022-01-30 22:30:13,459 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:30:13,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923680868] [2022-01-30 22:30:13,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923680868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:30:13,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:30:13,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 34 [2022-01-30 22:30:13,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252703072] [2022-01-30 22:30:13,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:30:13,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-30 22:30:13,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:30:13,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-30 22:30:13,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-01-30 22:30:13,462 INFO L87 Difference]: Start difference. First operand 132 states and 147 transitions. Second operand has 34 states, 32 states have (on average 1.875) internal successors, (60), 33 states have internal predecessors, (60), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:30:13,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:30:13,879 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2022-01-30 22:30:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 22:30:13,880 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.875) internal successors, (60), 33 states have internal predecessors, (60), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2022-01-30 22:30:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:30:13,880 INFO L225 Difference]: With dead ends: 141 [2022-01-30 22:30:13,880 INFO L226 Difference]: Without dead ends: 110 [2022-01-30 22:30:13,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2022-01-30 22:30:13,881 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:30:13,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 241 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 315 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-01-30 22:30:13,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-01-30 22:30:13,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2022-01-30 22:30:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 93 states have (on average 1.1612903225806452) internal successors, (108), 94 states have internal predecessors, (108), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:30:13,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2022-01-30 22:30:13,895 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 44 [2022-01-30 22:30:13,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:30:13,895 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2022-01-30 22:30:13,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.875) internal successors, (60), 33 states have internal predecessors, (60), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:30:13,895 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2022-01-30 22:30:13,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-30 22:30:13,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:30:13,896 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:30:13,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-30 22:30:14,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-30 22:30:14,109 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:30:14,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:30:14,109 INFO L85 PathProgramCache]: Analyzing trace with hash 981092775, now seen corresponding path program 7 times [2022-01-30 22:30:14,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:30:14,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182028320] [2022-01-30 22:30:14,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:30:14,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:30:14,120 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:30:14,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322503071] [2022-01-30 22:30:14,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-30 22:30:14,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:30:14,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:30:14,141 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:30:14,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-30 22:30:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:30:14,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-30 22:30:14,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:30:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 34 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-30 22:30:14,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:30:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-30 22:30:14,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:30:14,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182028320] [2022-01-30 22:30:14,421 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:30:14,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322503071] [2022-01-30 22:30:14,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322503071] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:30:14,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:30:14,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2022-01-30 22:30:14,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938122732] [2022-01-30 22:30:14,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:30:14,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-30 22:30:14,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:30:14,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-30 22:30:14,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-01-30 22:30:14,422 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 22:30:14,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:30:14,638 INFO L93 Difference]: Finished difference Result 183 states and 208 transitions. [2022-01-30 22:30:14,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-30 22:30:14,638 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2022-01-30 22:30:14,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:30:14,639 INFO L225 Difference]: With dead ends: 183 [2022-01-30 22:30:14,639 INFO L226 Difference]: Without dead ends: 141 [2022-01-30 22:30:14,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2022-01-30 22:30:14,640 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 81 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:30:14,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 160 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:30:14,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-30 22:30:14,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 119. [2022-01-30 22:30:14,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 104 states have (on average 1.1346153846153846) internal successors, (118), 106 states have internal predecessors, (118), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-30 22:30:14,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2022-01-30 22:30:14,658 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 44 [2022-01-30 22:30:14,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:30:14,658 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2022-01-30 22:30:14,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 22:30:14,658 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2022-01-30 22:30:14,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-30 22:30:14,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:30:14,659 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:30:14,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-30 22:30:14,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-30 22:30:14,875 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:30:14,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:30:14,875 INFO L85 PathProgramCache]: Analyzing trace with hash 575121895, now seen corresponding path program 8 times [2022-01-30 22:30:14,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:30:14,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383294819] [2022-01-30 22:30:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:30:14,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:30:14,882 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:30:14,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38238811] [2022-01-30 22:30:14,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:30:14,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:30:14,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:30:14,884 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:30:14,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-30 22:30:15,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:30:15,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:30:15,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-30 22:30:15,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:30:15,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-01-30 22:30:15,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:30:15,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-30 22:30:15,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-01-30 22:30:15,295 INFO L353 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2022-01-30 22:30:15,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 65 [2022-01-30 22:30:15,310 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-30 22:30:15,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 26 [2022-01-30 22:30:15,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-01-30 22:30:15,343 INFO L353 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2022-01-30 22:30:15,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 65 [2022-01-30 22:30:15,347 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:30:15,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:30:15,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2022-01-30 22:30:15,383 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:30:15,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:30:15,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-01-30 22:30:15,425 INFO L353 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2022-01-30 22:30:15,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 65 [2022-01-30 22:30:15,439 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-30 22:30:15,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 26 [2022-01-30 22:30:15,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 101 [2022-01-30 22:30:15,475 INFO L353 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2022-01-30 22:30:15,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 102 [2022-01-30 22:30:15,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:30:15,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2022-01-30 22:30:15,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 64 [2022-01-30 22:30:15,542 INFO L353 Elim1Store]: treesize reduction 102, result has 20.9 percent of original size [2022-01-30 22:30:15,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 83 [2022-01-30 22:30:15,558 INFO L353 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2022-01-30 22:30:15,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 38 [2022-01-30 22:30:15,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 64 [2022-01-30 22:30:15,598 INFO L353 Elim1Store]: treesize reduction 102, result has 20.9 percent of original size [2022-01-30 22:30:15,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 83 [2022-01-30 22:30:15,601 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:30:15,616 INFO L353 Elim1Store]: treesize reduction 22, result has 4.3 percent of original size [2022-01-30 22:30:15,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 38 [2022-01-30 22:30:15,645 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:30:15,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:30:15,740 INFO L353 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-01-30 22:30:15,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 26 [2022-01-30 22:30:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:30:15,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:30:18,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-01-30 22:30:18,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-30 22:30:18,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-30 22:30:18,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 56 [2022-01-30 22:30:18,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2022-01-30 22:30:18,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-30 22:30:18,505 INFO L353 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2022-01-30 22:30:18,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 285 treesize of output 276 [2022-01-30 22:30:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:30:18,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:30:18,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383294819] [2022-01-30 22:30:18,712 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:30:18,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38238811] [2022-01-30 22:30:18,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38238811] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:30:18,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:30:18,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26] total 38 [2022-01-30 22:30:18,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173481330] [2022-01-30 22:30:18,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:30:18,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-30 22:30:18,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:30:18,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-30 22:30:18,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1215, Unknown=0, NotChecked=0, Total=1406 [2022-01-30 22:30:18,725 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand has 38 states, 36 states have (on average 1.75) internal successors, (63), 37 states have internal predecessors, (63), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:30:19,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:30:19,373 INFO L93 Difference]: Finished difference Result 164 states and 182 transitions. [2022-01-30 22:30:19,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-30 22:30:19,374 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.75) internal successors, (63), 37 states have internal predecessors, (63), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2022-01-30 22:30:19,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:30:19,374 INFO L225 Difference]: With dead ends: 164 [2022-01-30 22:30:19,374 INFO L226 Difference]: Without dead ends: 162 [2022-01-30 22:30:19,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2022-01-30 22:30:19,375 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:30:19,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 322 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 334 Invalid, 0 Unknown, 403 Unchecked, 0.2s Time] [2022-01-30 22:30:19,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-30 22:30:19,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 148. [2022-01-30 22:30:19,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 131 states have (on average 1.1450381679389312) internal successors, (150), 133 states have internal predecessors, (150), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-30 22:30:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 166 transitions. [2022-01-30 22:30:19,398 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 166 transitions. Word has length 44 [2022-01-30 22:30:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:30:19,398 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 166 transitions. [2022-01-30 22:30:19,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.75) internal successors, (63), 37 states have internal predecessors, (63), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:30:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 166 transitions. [2022-01-30 22:30:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-30 22:30:19,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:30:19,398 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:30:19,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-30 22:30:19,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:30:19,615 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:30:19,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:30:19,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1160309410, now seen corresponding path program 9 times [2022-01-30 22:30:19,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:30:19,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556792116] [2022-01-30 22:30:19,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:30:19,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:30:19,621 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:30:19,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689532734] [2022-01-30 22:30:19,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:30:19,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:30:19,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:30:19,622 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:30:19,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-30 22:30:19,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-30 22:30:19,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:30:19,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 74 conjunts are in the unsatisfiable core [2022-01-30 22:30:19,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:30:20,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 45 [2022-01-30 22:30:20,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-30 22:30:20,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 45 [2022-01-30 22:30:20,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:30:20,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 13 [2022-01-30 22:30:20,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-01-30 22:30:20,069 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:30:20,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-30 22:30:20,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 66 [2022-01-30 22:30:20,130 INFO L353 Elim1Store]: treesize reduction 102, result has 20.9 percent of original size [2022-01-30 22:30:20,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 85 [2022-01-30 22:30:20,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:30:20,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 25 [2022-01-30 22:30:20,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-01-30 22:30:20,248 INFO L353 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2022-01-30 22:30:20,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 65 [2022-01-30 22:30:20,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:30:20,264 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-30 22:30:20,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 26 [2022-01-30 22:30:20,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-01-30 22:30:20,308 INFO L353 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2022-01-30 22:30:20,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 65 [2022-01-30 22:30:20,323 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-30 22:30:20,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 26 [2022-01-30 22:30:20,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 93 [2022-01-30 22:30:20,384 INFO L353 Elim1Store]: treesize reduction 220, result has 12.4 percent of original size [2022-01-30 22:30:20,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 92 treesize of output 105 [2022-01-30 22:30:20,403 INFO L353 Elim1Store]: treesize reduction 52, result has 5.5 percent of original size [2022-01-30 22:30:20,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 35 [2022-01-30 22:30:20,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 60 [2022-01-30 22:30:20,468 INFO L353 Elim1Store]: treesize reduction 102, result has 20.9 percent of original size [2022-01-30 22:30:20,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 79 [2022-01-30 22:30:20,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:30:20,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 25 [2022-01-30 22:30:21,104 INFO L353 Elim1Store]: treesize reduction 146, result has 2.0 percent of original size [2022-01-30 22:30:21,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 35 [2022-01-30 22:30:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:30:21,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:30:37,449 WARN L228 SmtUtils]: Spent 15.83s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-30 22:31:04,645 WARN L228 SmtUtils]: Spent 12.25s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-30 22:31:21,224 WARN L228 SmtUtils]: Spent 11.05s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-30 22:31:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 28 refuted. 2 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 22:31:25,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:31:25,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556792116] [2022-01-30 22:31:25,732 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:31:25,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689532734] [2022-01-30 22:31:25,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689532734] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:31:25,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:31:25,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 31] total 62 [2022-01-30 22:31:25,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343588419] [2022-01-30 22:31:25,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:31:25,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-30 22:31:25,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:31:25,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-30 22:31:25,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=3290, Unknown=4, NotChecked=0, Total=3782 [2022-01-30 22:31:25,733 INFO L87 Difference]: Start difference. First operand 148 states and 166 transitions. Second operand has 62 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 59 states have internal predecessors, (75), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-30 22:31:41,276 WARN L228 SmtUtils]: Spent 9.12s on a formula simplification. DAG size of input: 125 DAG size of output: 4 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-30 22:31:43,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:31:43,132 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2022-01-30 22:31:43,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-30 22:31:43,133 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 59 states have internal predecessors, (75), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2022-01-30 22:31:43,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:31:43,134 INFO L225 Difference]: With dead ends: 160 [2022-01-30 22:31:43,134 INFO L226 Difference]: Without dead ends: 158 [2022-01-30 22:31:43,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2379 ImplicationChecksByTransitivity, 76.4s TimeCoverageRelationStatistics Valid=987, Invalid=7196, Unknown=7, NotChecked=0, Total=8190 [2022-01-30 22:31:43,136 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 89 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 616 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-30 22:31:43,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 289 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 485 Invalid, 0 Unknown, 616 Unchecked, 0.7s Time] [2022-01-30 22:31:43,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-30 22:31:43,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2022-01-30 22:31:43,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 133 states have (on average 1.1428571428571428) internal successors, (152), 134 states have internal predecessors, (152), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-30 22:31:43,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 168 transitions. [2022-01-30 22:31:43,182 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 168 transitions. Word has length 48 [2022-01-30 22:31:43,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:31:43,182 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 168 transitions. [2022-01-30 22:31:43,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 59 states have internal predecessors, (75), 8 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-30 22:31:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 168 transitions. [2022-01-30 22:31:43,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-30 22:31:43,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:31:43,183 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:31:43,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-30 22:31:43,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:31:43,400 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:31:43,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:31:43,401 INFO L85 PathProgramCache]: Analyzing trace with hash -329258874, now seen corresponding path program 9 times [2022-01-30 22:31:43,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:31:43,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132492508] [2022-01-30 22:31:43,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:31:43,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:31:43,409 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:31:43,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206704425] [2022-01-30 22:31:43,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:31:43,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:31:43,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:31:43,410 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:31:43,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-30 22:31:44,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-01-30 22:31:44,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:31:44,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-30 22:31:44,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:31:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 100 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:31:44,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:31:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 100 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:31:45,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:31:45,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132492508] [2022-01-30 22:31:45,105 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:31:45,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206704425] [2022-01-30 22:31:45,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206704425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:31:45,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:31:45,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2022-01-30 22:31:45,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098314155] [2022-01-30 22:31:45,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:31:45,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-30 22:31:45,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:31:45,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-30 22:31:45,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-01-30 22:31:45,107 INFO L87 Difference]: Start difference. First operand 150 states and 168 transitions. Second operand has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:31:46,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:31:46,631 INFO L93 Difference]: Finished difference Result 464 states and 539 transitions. [2022-01-30 22:31:46,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-30 22:31:46,631 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-30 22:31:46,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:31:46,634 INFO L225 Difference]: With dead ends: 464 [2022-01-30 22:31:46,634 INFO L226 Difference]: Without dead ends: 410 [2022-01-30 22:31:46,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1453, Invalid=5027, Unknown=0, NotChecked=0, Total=6480 [2022-01-30 22:31:46,636 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 682 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 726 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 726 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-30 22:31:46,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 194 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [726 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-30 22:31:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-01-30 22:31:46,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 287. [2022-01-30 22:31:46,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 246 states have (on average 1.0853658536585367) internal successors, (267), 253 states have internal predecessors, (267), 29 states have call successors, (29), 13 states have call predecessors, (29), 11 states have return successors, (25), 20 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-30 22:31:46,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 321 transitions. [2022-01-30 22:31:46,708 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 321 transitions. Word has length 46 [2022-01-30 22:31:46,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:31:46,708 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 321 transitions. [2022-01-30 22:31:46,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1176470588235294) internal successors, (72), 34 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:31:46,709 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 321 transitions. [2022-01-30 22:31:46,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-30 22:31:46,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:31:46,710 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:31:46,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-30 22:31:46,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-01-30 22:31:46,924 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:31:46,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:31:46,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1907774911, now seen corresponding path program 10 times [2022-01-30 22:31:46,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:31:46,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124336169] [2022-01-30 22:31:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:31:46,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:31:46,932 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:31:46,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30120371] [2022-01-30 22:31:46,932 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:31:46,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:31:46,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:31:46,933 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:31:46,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-30 22:31:47,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:31:47,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:31:47,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-30 22:31:47,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:31:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 58 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-30 22:31:47,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:31:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 27 proven. 58 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-01-30 22:31:47,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:31:47,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124336169] [2022-01-30 22:31:47,331 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:31:47,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30120371] [2022-01-30 22:31:47,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30120371] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:31:47,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:31:47,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2022-01-30 22:31:47,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235608429] [2022-01-30 22:31:47,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:31:47,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-30 22:31:47,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:31:47,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-30 22:31:47,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-01-30 22:31:47,332 INFO L87 Difference]: Start difference. First operand 287 states and 321 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 22:31:47,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:31:47,816 INFO L93 Difference]: Finished difference Result 414 states and 470 transitions. [2022-01-30 22:31:47,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-30 22:31:47,816 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2022-01-30 22:31:47,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:31:47,817 INFO L225 Difference]: With dead ends: 414 [2022-01-30 22:31:47,817 INFO L226 Difference]: Without dead ends: 374 [2022-01-30 22:31:47,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2022-01-30 22:31:47,818 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 94 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 22:31:47,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 189 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 22:31:47,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-01-30 22:31:47,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 280. [2022-01-30 22:31:47,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 241 states have (on average 1.0746887966804979) internal successors, (259), 247 states have internal predecessors, (259), 27 states have call successors, (27), 13 states have call predecessors, (27), 11 states have return successors, (23), 19 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-30 22:31:47,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 309 transitions. [2022-01-30 22:31:47,883 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 309 transitions. Word has length 50 [2022-01-30 22:31:47,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:31:47,883 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 309 transitions. [2022-01-30 22:31:47,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 22:31:47,883 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 309 transitions. [2022-01-30 22:31:47,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-30 22:31:47,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:31:47,884 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:31:47,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-30 22:31:48,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-01-30 22:31:48,100 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:31:48,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:31:48,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2101957602, now seen corresponding path program 11 times [2022-01-30 22:31:48,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:31:48,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909655133] [2022-01-30 22:31:48,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:31:48,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:31:48,110 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:31:48,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321297357] [2022-01-30 22:31:48,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:31:48,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:31:48,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:31:48,112 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:31:48,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-30 22:36:24,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-01-30 22:36:24,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:36:24,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 51 conjunts are in the unsatisfiable core [2022-01-30 22:36:24,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:36:24,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-01-30 22:36:24,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:36:24,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-30 22:36:24,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-01-30 22:36:24,265 INFO L353 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2022-01-30 22:36:24,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 65 [2022-01-30 22:36:24,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:36:24,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:36:24,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2022-01-30 22:36:24,306 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:36:24,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:36:24,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-01-30 22:36:24,349 INFO L353 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2022-01-30 22:36:24,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 65 [2022-01-30 22:36:24,363 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-30 22:36:24,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 26 [2022-01-30 22:36:24,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-01-30 22:36:24,400 INFO L353 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2022-01-30 22:36:24,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 65 [2022-01-30 22:36:24,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:36:24,428 INFO L353 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-01-30 22:36:24,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 26 [2022-01-30 22:36:24,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 101 [2022-01-30 22:36:24,467 INFO L353 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2022-01-30 22:36:24,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 102 [2022-01-30 22:36:24,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:36:24,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 19 [2022-01-30 22:36:24,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-01-30 22:36:24,538 INFO L353 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2022-01-30 22:36:24,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 65 [2022-01-30 22:36:24,547 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-30 22:36:24,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-30 22:36:24,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 17 [2022-01-30 22:36:24,598 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-30 22:36:24,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-01-30 22:36:24,799 INFO L353 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-01-30 22:36:24,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 26 [2022-01-30 22:36:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-30 22:36:24,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:36:28,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2022-01-30 22:36:28,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-30 22:36:28,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-30 22:36:28,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 56 [2022-01-30 22:36:28,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2022-01-30 22:36:28,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-30 22:36:28,497 INFO L353 Elim1Store]: treesize reduction 43, result has 21.8 percent of original size [2022-01-30 22:36:28,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 289 treesize of output 276 [2022-01-30 22:36:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-30 22:36:28,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:36:28,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909655133] [2022-01-30 22:36:28,728 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:36:28,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321297357] [2022-01-30 22:36:28,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321297357] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:36:28,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:36:28,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26] total 38 [2022-01-30 22:36:28,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728901016] [2022-01-30 22:36:28,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:36:28,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-30 22:36:28,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:36:28,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-30 22:36:28,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1240, Unknown=1, NotChecked=0, Total=1406 [2022-01-30 22:36:28,730 INFO L87 Difference]: Start difference. First operand 280 states and 309 transitions. Second operand has 38 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 37 states have internal predecessors, (67), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:36:30,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:36:30,520 INFO L93 Difference]: Finished difference Result 311 states and 339 transitions. [2022-01-30 22:36:30,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-30 22:36:30,520 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 37 states have internal predecessors, (67), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 52 [2022-01-30 22:36:30,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:36:30,522 INFO L225 Difference]: With dead ends: 311 [2022-01-30 22:36:30,522 INFO L226 Difference]: Without dead ends: 307 [2022-01-30 22:36:30,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 58 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=232, Invalid=1659, Unknown=1, NotChecked=0, Total=1892 [2022-01-30 22:36:30,524 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 22:36:30,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 316 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 316 Invalid, 0 Unknown, 195 Unchecked, 0.3s Time] [2022-01-30 22:36:30,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-01-30 22:36:30,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2022-01-30 22:36:30,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 261 states have (on average 1.0651340996168583) internal successors, (278), 268 states have internal predecessors, (278), 30 states have call successors, (30), 17 states have call predecessors, (30), 15 states have return successors, (26), 21 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-30 22:36:30,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 334 transitions. [2022-01-30 22:36:30,597 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 334 transitions. Word has length 52 [2022-01-30 22:36:30,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:36:30,597 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 334 transitions. [2022-01-30 22:36:30,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 37 states have internal predecessors, (67), 7 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:36:30,597 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 334 transitions. [2022-01-30 22:36:30,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-30 22:36:30,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:36:30,598 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:36:30,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-30 22:36:30,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:36:30,824 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:36:30,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:36:30,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1178539582, now seen corresponding path program 10 times [2022-01-30 22:36:30,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:36:30,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017273496] [2022-01-30 22:36:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:36:30,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:36:30,832 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:36:30,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992478937] [2022-01-30 22:36:30,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:36:30,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:36:30,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:36:30,834 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:36:30,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-30 22:36:30,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:36:30,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:36:30,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-30 22:36:30,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:36:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:36:31,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:36:31,377 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:36:31,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:36:31,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017273496] [2022-01-30 22:36:31,377 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:36:31,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992478937] [2022-01-30 22:36:31,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992478937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:36:31,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:36:31,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2022-01-30 22:36:31,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095205128] [2022-01-30 22:36:31,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:36:31,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-30 22:36:31,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:36:31,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-30 22:36:31,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-01-30 22:36:31,378 INFO L87 Difference]: Start difference. First operand 307 states and 334 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:36:32,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:36:32,314 INFO L93 Difference]: Finished difference Result 459 states and 516 transitions. [2022-01-30 22:36:32,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-30 22:36:32,315 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-30 22:36:32,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:36:32,316 INFO L225 Difference]: With dead ends: 459 [2022-01-30 22:36:32,316 INFO L226 Difference]: Without dead ends: 422 [2022-01-30 22:36:32,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=1887, Unknown=0, NotChecked=0, Total=2450 [2022-01-30 22:36:32,317 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 131 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-30 22:36:32,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 321 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-30 22:36:32,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-01-30 22:36:32,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 338. [2022-01-30 22:36:32,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 284 states have (on average 1.056338028169014) internal successors, (300), 291 states have internal predecessors, (300), 37 states have call successors, (37), 18 states have call predecessors, (37), 16 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-30 22:36:32,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 369 transitions. [2022-01-30 22:36:32,398 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 369 transitions. Word has length 50 [2022-01-30 22:36:32,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:36:32,398 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 369 transitions. [2022-01-30 22:36:32,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-30 22:36:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 369 transitions. [2022-01-30 22:36:32,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-30 22:36:32,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:36:32,399 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:36:32,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-30 22:36:32,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:36:32,614 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:36:32,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:36:32,614 INFO L85 PathProgramCache]: Analyzing trace with hash -2070648033, now seen corresponding path program 12 times [2022-01-30 22:36:32,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:36:32,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193172026] [2022-01-30 22:36:32,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:36:32,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:36:32,626 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:36:32,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [908811906] [2022-01-30 22:36:32,626 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-30 22:36:32,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:36:32,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:36:32,627 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:36:32,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-30 22:36:39,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-30 22:36:39,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:36:39,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-30 22:36:39,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:36:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 49 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-30 22:36:39,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:36:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 51 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-30 22:36:40,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:36:40,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193172026] [2022-01-30 22:36:40,017 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:36:40,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908811906] [2022-01-30 22:36:40,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908811906] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:36:40,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:36:40,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2022-01-30 22:36:40,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557293585] [2022-01-30 22:36:40,017 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:36:40,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-30 22:36:40,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:36:40,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-30 22:36:40,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2022-01-30 22:36:40,018 INFO L87 Difference]: Start difference. First operand 338 states and 369 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 22:36:40,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:36:40,988 INFO L93 Difference]: Finished difference Result 455 states and 499 transitions. [2022-01-30 22:36:40,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-30 22:36:40,989 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-01-30 22:36:40,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:36:40,990 INFO L225 Difference]: With dead ends: 455 [2022-01-30 22:36:40,990 INFO L226 Difference]: Without dead ends: 404 [2022-01-30 22:36:40,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=583, Invalid=1967, Unknown=0, NotChecked=0, Total=2550 [2022-01-30 22:36:40,992 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 179 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-30 22:36:40,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 377 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-30 22:36:40,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-30 22:36:41,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 371. [2022-01-30 22:36:41,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 309 states have (on average 1.0485436893203883) internal successors, (324), 314 states have internal predecessors, (324), 42 states have call successors, (42), 21 states have call predecessors, (42), 19 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-01-30 22:36:41,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 401 transitions. [2022-01-30 22:36:41,079 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 401 transitions. Word has length 52 [2022-01-30 22:36:41,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:36:41,079 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 401 transitions. [2022-01-30 22:36:41,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-30 22:36:41,079 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 401 transitions. [2022-01-30 22:36:41,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-30 22:36:41,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:36:41,080 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:36:41,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-30 22:36:41,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-01-30 22:36:41,292 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:36:41,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:36:41,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1202756256, now seen corresponding path program 11 times [2022-01-30 22:36:41,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:36:41,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804005460] [2022-01-30 22:36:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:36:41,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:36:41,300 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:36:41,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288053841] [2022-01-30 22:36:41,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:36:41,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:36:41,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:36:41,316 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:36:41,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process