/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-fpi/brs1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 00:42:33,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 00:42:33,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 00:42:33,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 00:42:33,991 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 [2022-01-31 00:42:34,015 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 00:42:34,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 00:42:34,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 00:42:34,015 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 00:42:34,016 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 00:42:34,016 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 00:42:34,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 00:42:34,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 00:42:34,017 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 00:42:34,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 00:42:34,017 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 00:42:34,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 00:42:34,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 00:42:34,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 00:42:34,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 00:42:34,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 00:42:34,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 00:42:34,018 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 00:42:34,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 00:42:34,018 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 00:42:34,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 00:42:34,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 00:42:34,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 00:42:34,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 00:42:34,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 00:42:34,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 00:42:34,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 00:42:34,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 00:42:34,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 00:42:34,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 00:42:34,019 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 00:42:34,019 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 00:42:34,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 00:42:34,019 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 00:42:34,170 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 00:42:34,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 00:42:34,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 00:42:34,194 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 00:42:34,195 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 00:42:34,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs1.c [2022-01-31 00:42:34,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81caf573a/aeff27e74de84646aa597591e2102d86/FLAG31e44cb38 [2022-01-31 00:42:34,566 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 00:42:34,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs1.c [2022-01-31 00:42:34,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81caf573a/aeff27e74de84646aa597591e2102d86/FLAG31e44cb38 [2022-01-31 00:42:35,006 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81caf573a/aeff27e74de84646aa597591e2102d86 [2022-01-31 00:42:35,009 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 00:42:35,012 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 00:42:35,015 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 00:42:35,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 00:42:35,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 00:42:35,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:42:35" (1/1) ... [2022-01-31 00:42:35,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5284cb3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:42:35, skipping insertion in model container [2022-01-31 00:42:35,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 12:42:35" (1/1) ... [2022-01-31 00:42:35,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 00:42:35,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 00:42:35,136 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-fpi/brs1.c[587,600] [2022-01-31 00:42:35,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 00:42:35,164 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 00:42:35,171 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-fpi/brs1.c[587,600] [2022-01-31 00:42:35,175 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 00:42:35,183 INFO L208 MainTranslator]: Completed translation [2022-01-31 00:42:35,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:42:35 WrapperNode [2022-01-31 00:42:35,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 00:42:35,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 00:42:35,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 00:42:35,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 00:42:35,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:42:35" (1/1) ... [2022-01-31 00:42:35,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:42:35" (1/1) ... [2022-01-31 00:42:35,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:42:35" (1/1) ... [2022-01-31 00:42:35,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:42:35" (1/1) ... [2022-01-31 00:42:35,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:42:35" (1/1) ... [2022-01-31 00:42:35,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:42:35" (1/1) ... [2022-01-31 00:42:35,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:42:35" (1/1) ... [2022-01-31 00:42:35,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 00:42:35,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 00:42:35,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 00:42:35,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 00:42:35,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:42:35" (1/1) ... [2022-01-31 00:42:35,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 00:42:35,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:42:35,255 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) [2022-01-31 00:42:35,262 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 [2022-01-31 00:42:35,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 00:42:35,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 00:42:35,284 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 00:42:35,284 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 00:42:35,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 00:42:35,287 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 00:42:35,287 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 00:42:35,287 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 00:42:35,287 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 00:42:35,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 00:42:35,288 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 00:42:35,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 00:42:35,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 00:42:35,288 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 00:42:35,288 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 00:42:35,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 00:42:35,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 00:42:35,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 00:42:35,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 00:42:35,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 00:42:35,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 00:42:35,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 00:42:35,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 00:42:35,353 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 00:42:35,355 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 00:42:35,486 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 00:42:35,490 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 00:42:35,490 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 00:42:35,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:42:35 BoogieIcfgContainer [2022-01-31 00:42:35,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 00:42:35,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 00:42:35,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 00:42:35,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 00:42:35,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 12:42:35" (1/3) ... [2022-01-31 00:42:35,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ec26e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:42:35, skipping insertion in model container [2022-01-31 00:42:35,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 12:42:35" (2/3) ... [2022-01-31 00:42:35,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45ec26e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 12:42:35, skipping insertion in model container [2022-01-31 00:42:35,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 12:42:35" (3/3) ... [2022-01-31 00:42:35,511 INFO L111 eAbstractionObserver]: Analyzing ICFG brs1.c [2022-01-31 00:42:35,514 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 00:42:35,514 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 00:42:35,543 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 00:42:35,547 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 [2022-01-31 00:42:35,547 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 00:42:35,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 00:42:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 00:42:35,561 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:42:35,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:42:35,562 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:42:35,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:42:35,565 INFO L85 PathProgramCache]: Analyzing trace with hash 816154861, now seen corresponding path program 1 times [2022-01-31 00:42:35,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:42:35,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438787095] [2022-01-31 00:42:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:42:35,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:42:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:35,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:42:35,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:35,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 00:42:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:42:35,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:42:35,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438787095] [2022-01-31 00:42:35,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438787095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 00:42:35,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 00:42:35,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 00:42:35,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425904786] [2022-01-31 00:42:35,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 00:42:35,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 00:42:35,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:42:35,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 00:42:35,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 00:42:35,828 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:42:35,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:42:35,893 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2022-01-31 00:42:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 00:42:35,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-01-31 00:42:35,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:42:35,898 INFO L225 Difference]: With dead ends: 56 [2022-01-31 00:42:35,899 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 00:42:35,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 00:42:35,904 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 00:42:35,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 00:42:35,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 00:42:35,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 00:42:35,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:42:35,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-01-31 00:42:35,934 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2022-01-31 00:42:35,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:42:35,934 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-01-31 00:42:35,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:42:35,934 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-01-31 00:42:35,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 00:42:35,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:42:35,936 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:42:35,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 00:42:35,937 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:42:35,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:42:35,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1231644863, now seen corresponding path program 1 times [2022-01-31 00:42:35,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:42:35,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128212261] [2022-01-31 00:42:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:42:35,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:42:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:36,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:42:36,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:36,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 00:42:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:42:36,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:42:36,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128212261] [2022-01-31 00:42:36,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128212261] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 00:42:36,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 00:42:36,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 00:42:36,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139730265] [2022-01-31 00:42:36,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 00:42:36,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 00:42:36,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:42:36,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 00:42:36,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 00:42:36,036 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:42:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:42:36,111 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-01-31 00:42:36,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 00:42:36,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-01-31 00:42:36,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:42:36,113 INFO L225 Difference]: With dead ends: 42 [2022-01-31 00:42:36,113 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 00:42:36,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 00:42:36,118 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 00:42:36,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 29 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 00:42:36,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 00:42:36,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-01-31 00:42:36,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:42:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-01-31 00:42:36,129 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2022-01-31 00:42:36,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:42:36,129 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-01-31 00:42:36,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:42:36,129 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-01-31 00:42:36,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 00:42:36,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:42:36,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:42:36,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 00:42:36,130 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:42:36,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:42:36,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1305126266, now seen corresponding path program 1 times [2022-01-31 00:42:36,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:42:36,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146994527] [2022-01-31 00:42:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:42:36,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:42:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:36,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:42:36,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:36,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 00:42:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 00:42:36,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:42:36,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146994527] [2022-01-31 00:42:36,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146994527] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 00:42:36,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 00:42:36,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 00:42:36,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601398238] [2022-01-31 00:42:36,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 00:42:36,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 00:42:36,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:42:36,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 00:42:36,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-01-31 00:42:36,287 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:42:36,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:42:36,400 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-01-31 00:42:36,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 00:42:36,401 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-01-31 00:42:36,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:42:36,401 INFO L225 Difference]: With dead ends: 38 [2022-01-31 00:42:36,402 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 00:42:36,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-31 00:42:36,403 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:42:36,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 66 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 00:42:36,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 00:42:36,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-01-31 00:42:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:42:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-01-31 00:42:36,407 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2022-01-31 00:42:36,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:42:36,407 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-01-31 00:42:36,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:42:36,407 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-01-31 00:42:36,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 00:42:36,408 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:42:36,408 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:42:36,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 00:42:36,408 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:42:36,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:42:36,409 INFO L85 PathProgramCache]: Analyzing trace with hash -455123849, now seen corresponding path program 1 times [2022-01-31 00:42:36,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:42:36,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366990879] [2022-01-31 00:42:36,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:42:36,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:42:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:36,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:42:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:36,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 00:42:36,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:42:36,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:42:36,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366990879] [2022-01-31 00:42:36,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366990879] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 00:42:36,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781856779] [2022-01-31 00:42:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:42:36,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:42:36,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:42:36,484 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) [2022-01-31 00:42:36,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 00:42:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:36,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 00:42:36,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:42:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:42:36,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:42:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:42:36,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781856779] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:42:36,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 00:42:36,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-01-31 00:42:36,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580518725] [2022-01-31 00:42:36,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 00:42:36,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 00:42:36,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:42:36,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 00:42:36,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-31 00:42:36,809 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:42:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:42:36,913 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2022-01-31 00:42:36,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 00:42:36,914 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-01-31 00:42:36,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:42:36,915 INFO L225 Difference]: With dead ends: 54 [2022-01-31 00:42:36,915 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 00:42:36,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-01-31 00:42:36,916 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:42:36,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 51 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 00:42:36,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 00:42:36,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2022-01-31 00:42:36,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:42:36,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-01-31 00:42:36,919 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 30 [2022-01-31 00:42:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:42:36,920 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-01-31 00:42:36,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:42:36,920 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-01-31 00:42:36,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 00:42:36,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:42:36,921 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:42:36,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 00:42:37,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:42:37,122 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:42:37,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:42:37,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1723075679, now seen corresponding path program 2 times [2022-01-31 00:42:37,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:42:37,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680569236] [2022-01-31 00:42:37,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:42:37,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:42:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:37,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:42:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:37,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 00:42:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:42:37,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:42:37,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680569236] [2022-01-31 00:42:37,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680569236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 00:42:37,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008732247] [2022-01-31 00:42:37,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 00:42:37,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:42:37,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:42:37,500 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) [2022-01-31 00:42:37,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 00:42:37,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 00:42:37,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:42:37,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 00:42:37,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:42:37,697 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 15 treesize of output 11 [2022-01-31 00:42:37,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:42:37,835 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 23 treesize of output 22 [2022-01-31 00:42:37,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:42:37,975 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 00:42:37,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 41 [2022-01-31 00:42:44,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:42:44,399 INFO L353 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-01-31 00:42:44,399 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 1 case distinctions, treesize of input 34 treesize of output 13 [2022-01-31 00:42:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:42:44,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:42:48,635 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 106 treesize of output 98 [2022-01-31 00:42:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:42:48,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008732247] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:42:48,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 00:42:48,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 38 [2022-01-31 00:42:48,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059419051] [2022-01-31 00:42:48,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 00:42:48,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 00:42:48,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:42:48,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 00:42:48,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1222, Unknown=5, NotChecked=0, Total=1406 [2022-01-31 00:42:48,840 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 38 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 00:42:57,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:42:57,335 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-01-31 00:42:57,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 00:42:57,337 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2022-01-31 00:42:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:42:57,339 INFO L225 Difference]: With dead ends: 49 [2022-01-31 00:42:57,339 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 00:42:57,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=324, Invalid=2117, Unknown=9, NotChecked=0, Total=2450 [2022-01-31 00:42:57,342 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 00:42:57,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 110 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 315 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2022-01-31 00:42:57,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 00:42:57,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2022-01-31 00:42:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:42:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-01-31 00:42:57,354 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 33 [2022-01-31 00:42:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:42:57,354 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-01-31 00:42:57,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 4 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 00:42:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-01-31 00:42:57,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 00:42:57,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:42:57,357 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:42:57,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 00:42:57,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:42:57,557 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:42:57,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:42:57,558 INFO L85 PathProgramCache]: Analyzing trace with hash -434352270, now seen corresponding path program 3 times [2022-01-31 00:42:57,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:42:57,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318959053] [2022-01-31 00:42:57,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:42:57,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:42:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:57,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:42:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:57,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 00:42:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:57,627 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:42:57,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:42:57,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318959053] [2022-01-31 00:42:57,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318959053] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 00:42:57,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531733108] [2022-01-31 00:42:57,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 00:42:57,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:42:57,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:42:57,629 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) [2022-01-31 00:42:57,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 00:42:57,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-31 00:42:57,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:42:57,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 00:42:57,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:42:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:42:57,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:42:57,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:42:57,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531733108] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:42:57,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 00:42:57,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2022-01-31 00:42:57,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984962898] [2022-01-31 00:42:57,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 00:42:57,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 00:42:57,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:42:57,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 00:42:57,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-31 00:42:57,853 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:42:57,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:42:57,985 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2022-01-31 00:42:57,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 00:42:57,985 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2022-01-31 00:42:57,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:42:57,987 INFO L225 Difference]: With dead ends: 74 [2022-01-31 00:42:57,987 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 00:42:57,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-01-31 00:42:57,988 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:42:57,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 47 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 00:42:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 00:42:57,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2022-01-31 00:42:57,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:42:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-01-31 00:42:57,992 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 36 [2022-01-31 00:42:57,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:42:57,992 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-01-31 00:42:57,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:42:57,992 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-01-31 00:42:57,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 00:42:57,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:42:57,993 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:42:58,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 00:42:58,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:42:58,194 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:42:58,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:42:58,194 INFO L85 PathProgramCache]: Analyzing trace with hash 202862938, now seen corresponding path program 4 times [2022-01-31 00:42:58,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:42:58,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062621056] [2022-01-31 00:42:58,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:42:58,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:42:58,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:58,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:42:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:58,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 00:42:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:42:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:42:58,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:42:58,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062621056] [2022-01-31 00:42:58,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062621056] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 00:42:58,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456374600] [2022-01-31 00:42:58,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 00:42:58,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:42:58,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:42:58,684 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) [2022-01-31 00:42:58,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 00:42:58,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 00:42:58,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:42:58,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 00:42:58,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:42:58,797 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 15 treesize of output 11 [2022-01-31 00:42:58,889 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-01-31 00:42:58,889 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 [2022-01-31 00:42:58,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:42:58,998 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 00:42:58,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-01-31 00:42:59,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:42:59,088 INFO L353 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-01-31 00:42:59,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 51 [2022-01-31 00:42:59,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:42:59,203 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 00:42:59,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-01-31 00:42:59,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:42:59,331 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 00:42:59,331 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 1 case distinctions, treesize of input 47 treesize of output 15 [2022-01-31 00:42:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:42:59,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:43:32,570 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-31 00:43:32,571 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 2072 treesize of output 2018 [2022-01-31 00:43:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:43:33,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456374600] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:43:33,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 00:43:33,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 49 [2022-01-31 00:43:33,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068791001] [2022-01-31 00:43:33,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 00:43:33,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 00:43:33,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:43:33,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 00:43:33,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2115, Unknown=15, NotChecked=0, Total=2352 [2022-01-31 00:43:33,050 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 49 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 46 states have internal predecessors, (82), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:43:34,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:43:34,219 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2022-01-31 00:43:34,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 00:43:34,220 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 46 states have internal predecessors, (82), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2022-01-31 00:43:34,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:43:34,220 INFO L225 Difference]: With dead ends: 63 [2022-01-31 00:43:34,220 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 00:43:34,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=462, Invalid=4079, Unknown=15, NotChecked=0, Total=4556 [2022-01-31 00:43:34,222 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 00:43:34,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 204 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 627 Invalid, 0 Unknown, 289 Unchecked, 0.3s Time] [2022-01-31 00:43:34,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 00:43:34,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-01-31 00:43:34,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:43:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-01-31 00:43:34,226 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2022-01-31 00:43:34,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:43:34,227 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-01-31 00:43:34,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 46 states have internal predecessors, (82), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:43:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-01-31 00:43:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 00:43:34,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:43:34,227 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:43:34,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 00:43:34,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:43:34,444 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:43:34,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:43:34,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1338016919, now seen corresponding path program 5 times [2022-01-31 00:43:34,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:43:34,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704498649] [2022-01-31 00:43:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:43:34,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:43:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:43:34,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:43:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:43:34,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 00:43:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:43:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:43:34,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:43:34,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704498649] [2022-01-31 00:43:34,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704498649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 00:43:34,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083711756] [2022-01-31 00:43:34,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 00:43:34,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:43:34,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:43:34,551 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) [2022-01-31 00:43:34,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 00:43:34,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-31 00:43:34,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:43:34,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 00:43:34,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:43:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:43:34,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:43:34,819 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:43:34,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083711756] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:43:34,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 00:43:34,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2022-01-31 00:43:34,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657364196] [2022-01-31 00:43:34,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 00:43:34,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 00:43:34,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:43:34,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 00:43:34,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 00:43:34,820 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:43:34,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:43:34,975 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-01-31 00:43:34,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 00:43:34,976 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-01-31 00:43:34,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:43:34,977 INFO L225 Difference]: With dead ends: 88 [2022-01-31 00:43:34,977 INFO L226 Difference]: Without dead ends: 66 [2022-01-31 00:43:34,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-01-31 00:43:34,978 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:43:34,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 63 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 00:43:34,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-31 00:43:34,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2022-01-31 00:43:34,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:43:34,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-01-31 00:43:34,983 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2022-01-31 00:43:34,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:43:34,983 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-01-31 00:43:34,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:43:34,983 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-01-31 00:43:34,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 00:43:34,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:43:34,983 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:43:35,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 00:43:35,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:43:35,187 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:43:35,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:43:35,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1808046207, now seen corresponding path program 6 times [2022-01-31 00:43:35,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:43:35,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984104892] [2022-01-31 00:43:35,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:43:35,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:43:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:43:35,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:43:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:43:35,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 00:43:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:43:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:43:36,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:43:36,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984104892] [2022-01-31 00:43:36,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984104892] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 00:43:36,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638499021] [2022-01-31 00:43:36,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 00:43:36,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:43:36,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:43:36,004 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) [2022-01-31 00:43:36,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 00:43:36,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-31 00:43:36,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:43:36,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 48 conjunts are in the unsatisfiable core [2022-01-31 00:43:36,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:43:36,166 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 15 treesize of output 11 [2022-01-31 00:43:36,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,238 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 25 treesize of output 24 [2022-01-31 00:43:36,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-01-31 00:43:36,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2022-01-31 00:43:36,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:43:36,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 54 [2022-01-31 00:43:36,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:43:36,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 54 [2022-01-31 00:43:36,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 48 [2022-01-31 00:43:36,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:43:36,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 19 [2022-01-31 00:43:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:43:37,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:43:47,254 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_236 Int) (|main_~#sum~0.offset| Int) (v_ArrVal_234 Int) (v_ArrVal_238 Int)) (let ((.cse0 (store |c_#memory_int| c_main_~a~0.base (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset) 1)))) (let ((.cse1 (select .cse0 |c_main_~#sum~0.base|))) (or (not (<= v_ArrVal_236 (+ v_ArrVal_234 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |main_~#sum~0.offset| v_ArrVal_234)) c_main_~a~0.base) (+ c_main_~a~0.offset 4))))) (not (<= v_ArrVal_234 0)) (not (<= v_ArrVal_238 (+ v_ArrVal_236 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |main_~#sum~0.offset| v_ArrVal_236)) c_main_~a~0.base) (+ c_main_~a~0.offset 8))))) (<= (+ v_ArrVal_238 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |main_~#sum~0.offset| v_ArrVal_238)) c_main_~a~0.base) (+ c_main_~a~0.offset 12))) 4))))) is different from false [2022-01-31 00:43:49,413 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_236 Int) (|main_~#sum~0.offset| Int) (v_ArrVal_234 Int) (v_ArrVal_238 Int)) (let ((.cse0 (store |c_#memory_int| c_main_~a~0.base (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) c_main_~a~0.offset 4) 1)))) (let ((.cse1 (select .cse0 |c_main_~#sum~0.base|))) (or (<= (+ v_ArrVal_238 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |main_~#sum~0.offset| v_ArrVal_238)) c_main_~a~0.base) (+ c_main_~a~0.offset 12))) 4) (not (<= v_ArrVal_234 0)) (not (<= v_ArrVal_236 (+ v_ArrVal_234 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |main_~#sum~0.offset| v_ArrVal_234)) c_main_~a~0.base) (+ c_main_~a~0.offset 4))))) (not (<= v_ArrVal_238 (+ v_ArrVal_236 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |main_~#sum~0.offset| v_ArrVal_236)) c_main_~a~0.base) (+ c_main_~a~0.offset 8))))))))) is different from false [2022-01-31 00:44:19,016 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-01-31 00:44:19,017 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 4594 treesize of output 4534 [2022-01-31 00:44:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 1 times theorem prover too weak. 0 trivial. 10 not checked. [2022-01-31 00:44:21,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638499021] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:44:21,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 00:44:21,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 61 [2022-01-31 00:44:21,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810519134] [2022-01-31 00:44:21,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 00:44:21,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 00:44:21,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:44:21,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 00:44:21,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=3118, Unknown=18, NotChecked=230, Total=3660 [2022-01-31 00:44:21,294 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 61 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 58 states have internal predecessors, (100), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:44:55,310 WARN L228 SmtUtils]: Spent 5.41s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 00:45:28,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:45:28,636 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2022-01-31 00:45:28,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 00:45:28,636 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 58 states have internal predecessors, (100), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-01-31 00:45:28,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:45:28,637 INFO L225 Difference]: With dead ends: 107 [2022-01-31 00:45:28,637 INFO L226 Difference]: Without dead ends: 90 [2022-01-31 00:45:28,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2197 ImplicationChecksByTransitivity, 108.8s TimeCoverageRelationStatistics Valid=740, Invalid=6886, Unknown=38, NotChecked=346, Total=8010 [2022-01-31 00:45:28,639 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 563 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 00:45:28,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 258 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 886 Invalid, 0 Unknown, 563 Unchecked, 0.5s Time] [2022-01-31 00:45:28,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-31 00:45:28,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2022-01-31 00:45:28,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 78 states have internal predecessors, (86), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:45:28,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2022-01-31 00:45:28,650 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 45 [2022-01-31 00:45:28,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:45:28,651 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2022-01-31 00:45:28,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 58 states have (on average 1.7241379310344827) internal successors, (100), 58 states have internal predecessors, (100), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:45:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2022-01-31 00:45:28,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 00:45:28,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:45:28,651 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:45:28,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 00:45:28,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:45:28,868 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:45:28,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:45:28,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1186910034, now seen corresponding path program 7 times [2022-01-31 00:45:28,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:45:28,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783440652] [2022-01-31 00:45:28,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:45:28,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:45:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:45:28,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:45:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:45:28,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 00:45:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:45:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:45:28,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:45:28,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783440652] [2022-01-31 00:45:28,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783440652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 00:45:28,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597706656] [2022-01-31 00:45:28,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-31 00:45:28,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:45:28,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:45:29,008 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) [2022-01-31 00:45:29,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 00:45:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:45:29,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2022-01-31 00:45:29,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:45:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:45:29,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:45:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:45:29,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597706656] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:45:29,362 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 00:45:29,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-01-31 00:45:29,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832441208] [2022-01-31 00:45:29,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 00:45:29,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 00:45:29,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:45:29,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 00:45:29,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-01-31 00:45:29,363 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:45:29,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:45:29,553 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2022-01-31 00:45:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 00:45:29,554 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2022-01-31 00:45:29,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:45:29,554 INFO L225 Difference]: With dead ends: 121 [2022-01-31 00:45:29,554 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 00:45:29,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2022-01-31 00:45:29,555 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:45:29,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 76 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 00:45:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 00:45:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 70. [2022-01-31 00:45:29,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 63 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:45:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2022-01-31 00:45:29,563 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 48 [2022-01-31 00:45:29,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:45:29,563 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2022-01-31 00:45:29,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:45:29,563 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2022-01-31 00:45:29,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 00:45:29,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:45:29,564 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:45:29,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 00:45:29,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:45:29,794 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:45:29,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:45:29,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1456362810, now seen corresponding path program 8 times [2022-01-31 00:45:29,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:45:29,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372605048] [2022-01-31 00:45:29,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:45:29,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:45:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:45:30,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:45:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:45:30,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 00:45:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:45:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:45:30,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:45:30,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372605048] [2022-01-31 00:45:30,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372605048] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 00:45:30,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820948954] [2022-01-31 00:45:30,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 00:45:30,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:45:30,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:45:30,879 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) [2022-01-31 00:45:30,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 00:45:30,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 00:45:30,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:45:30,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 60 conjunts are in the unsatisfiable core [2022-01-31 00:45:30,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:45:30,982 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 10 treesize of output 8 [2022-01-31 00:45:31,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 00:45:31,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-01-31 00:45:31,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 42 [2022-01-31 00:45:31,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 81 [2022-01-31 00:45:31,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 91 [2022-01-31 00:45:31,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:45:31,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:31,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 92 [2022-01-31 00:45:32,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:45:32,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 86 [2022-01-31 00:45:32,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:45:32,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 82 [2022-01-31 00:45:32,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:32,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 00:45:32,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 98 [2022-01-31 00:45:33,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:33,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:33,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:33,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:33,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:33,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:45:33,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 23 [2022-01-31 00:45:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:45:33,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:45:36,572 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_~#sum~0.offset| Int) (v_ArrVal_354 Int) (v_ArrVal_352 Int) (v_ArrVal_350 Int) (v_ArrVal_349 Int)) (let ((.cse0 (select |c_#memory_int| |c_main_~#sum~0.base|)) (.cse1 (* c_main_~i~0 4))) (or (not (<= v_ArrVal_349 0)) (not (<= v_ArrVal_352 (+ v_ArrVal_350 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| (store .cse0 |main_~#sum~0.offset| v_ArrVal_350)) c_main_~a~0.base) (+ .cse1 c_main_~a~0.offset 8))))) (<= (+ v_ArrVal_354 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| (store .cse0 |main_~#sum~0.offset| v_ArrVal_354)) c_main_~a~0.base) (+ .cse1 c_main_~a~0.offset 16))) c_~N~0) (not (<= v_ArrVal_350 (+ v_ArrVal_349 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| (store .cse0 |main_~#sum~0.offset| v_ArrVal_349)) c_main_~a~0.base) (+ .cse1 c_main_~a~0.offset 4))))) (not (<= v_ArrVal_354 (+ v_ArrVal_352 (select (select (store |c_#memory_int| |c_main_~#sum~0.base| (store .cse0 |main_~#sum~0.offset| v_ArrVal_352)) c_main_~a~0.base) (+ .cse1 c_main_~a~0.offset 12)))))))) is different from false [2022-01-31 00:46:18,491 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_~#sum~0.offset| Int) (v_ArrVal_344 Int) (v_ArrVal_354 Int) (v_ArrVal_352 Int) (v_ArrVal_350 Int) (v_ArrVal_349 Int) (v_ArrVal_347 Int)) (let ((.cse0 (store |c_#memory_int| c_main_~a~0.base (let ((.cse2 (* c_main_~i~0 4))) (store (store (select |c_#memory_int| c_main_~a~0.base) (+ .cse2 c_main_~a~0.offset) v_ArrVal_344) (+ .cse2 c_main_~a~0.offset 4) v_ArrVal_347))))) (let ((.cse1 (select .cse0 |c_main_~#sum~0.base|))) (or (not (<= v_ArrVal_347 1)) (not (<= v_ArrVal_349 0)) (<= (+ v_ArrVal_354 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |main_~#sum~0.offset| v_ArrVal_354)) c_main_~a~0.base) (+ c_main_~a~0.offset 16))) c_~N~0) (not (<= v_ArrVal_344 1)) (not (<= v_ArrVal_352 (+ v_ArrVal_350 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |main_~#sum~0.offset| v_ArrVal_350)) c_main_~a~0.base) (+ c_main_~a~0.offset 8))))) (not (<= v_ArrVal_354 (+ v_ArrVal_352 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |main_~#sum~0.offset| v_ArrVal_352)) c_main_~a~0.base) (+ c_main_~a~0.offset 12))))) (not (<= v_ArrVal_350 (+ v_ArrVal_349 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |main_~#sum~0.offset| v_ArrVal_349)) c_main_~a~0.base) (+ c_main_~a~0.offset 4))))))))) is different from false [2022-01-31 00:47:49,052 INFO L353 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-01-31 00:47:49,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 227454 treesize of output 226014 [2022-01-31 00:49:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 2 times theorem prover too weak. 0 trivial. 13 not checked. [2022-01-31 00:49:07,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820948954] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:49:07,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 00:49:07,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 25] total 71 [2022-01-31 00:49:07,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153463635] [2022-01-31 00:49:07,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 00:49:07,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 00:49:07,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:49:07,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 00:49:07,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=4221, Unknown=51, NotChecked=270, Total=4970 [2022-01-31 00:49:07,964 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 71 states, 68 states have (on average 1.661764705882353) internal successors, (113), 68 states have internal predecessors, (113), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:49:24,299 WARN L228 SmtUtils]: Spent 9.36s on a formula simplification. DAG size of input: 158 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 00:49:50,778 WARN L228 SmtUtils]: Spent 16.80s on a formula simplification. DAG size of input: 191 DAG size of output: 159 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 00:50:28,089 WARN L228 SmtUtils]: Spent 17.68s on a formula simplification. DAG size of input: 226 DAG size of output: 159 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 00:51:16,912 WARN L228 SmtUtils]: Spent 8.21s on a formula simplification that was a NOOP. DAG size: 131 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 00:51:51,960 WARN L228 SmtUtils]: Spent 6.45s on a formula simplification that was a NOOP. DAG size: 130 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 00:52:47,434 WARN L228 SmtUtils]: Spent 13.34s on a formula simplification that was a NOOP. DAG size: 133 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 00:54:11,162 WARN L228 SmtUtils]: Spent 6.32s 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) [2022-01-31 00:54:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:54:17,963 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2022-01-31 00:54:17,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 00:54:17,964 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 68 states have (on average 1.661764705882353) internal successors, (113), 68 states have internal predecessors, (113), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2022-01-31 00:54:17,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:54:17,965 INFO L225 Difference]: With dead ends: 144 [2022-01-31 00:54:17,965 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 00:54:17,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 118 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 4116 ImplicationChecksByTransitivity, 438.7s TimeCoverageRelationStatistics Valid=1262, Invalid=12429, Unknown=123, NotChecked=466, Total=14280 [2022-01-31 00:54:17,969 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 105 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 2344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1171 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 00:54:17,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 283 Invalid, 2344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1080 Invalid, 0 Unknown, 1171 Unchecked, 0.8s Time] [2022-01-31 00:54:17,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 00:54:18,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2022-01-31 00:54:18,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 98 states have (on average 1.1224489795918366) internal successors, (110), 98 states have internal predecessors, (110), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:54:18,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2022-01-31 00:54:18,028 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 51 [2022-01-31 00:54:18,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:54:18,028 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2022-01-31 00:54:18,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 68 states have (on average 1.661764705882353) internal successors, (113), 68 states have internal predecessors, (113), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:54:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2022-01-31 00:54:18,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 00:54:18,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:54:18,030 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:54:18,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-31 00:54:18,232 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,SelfDestructingSolverStorable10 [2022-01-31 00:54:18,233 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:54:18,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:54:18,233 INFO L85 PathProgramCache]: Analyzing trace with hash -387935049, now seen corresponding path program 9 times [2022-01-31 00:54:18,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:54:18,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734140096] [2022-01-31 00:54:18,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:18,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:54:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:18,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:54:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:18,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 00:54:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:18,381 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:54:18,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:54:18,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734140096] [2022-01-31 00:54:18,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734140096] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 00:54:18,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925702734] [2022-01-31 00:54:18,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 00:54:18,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:54:18,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:54:18,384 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) [2022-01-31 00:54:18,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 00:54:18,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-01-31 00:54:18,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:54:18,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 00:54:18,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:54:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:54:18,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:54:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:54:18,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925702734] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:54:18,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 00:54:18,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-01-31 00:54:18,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000025663] [2022-01-31 00:54:18,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 00:54:18,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 00:54:18,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:54:18,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 00:54:18,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2022-01-31 00:54:18,810 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 23 states have internal predecessors, (74), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:54:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:54:19,125 INFO L93 Difference]: Finished difference Result 152 states and 171 transitions. [2022-01-31 00:54:19,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 00:54:19,125 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 23 states have internal predecessors, (74), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2022-01-31 00:54:19,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:54:19,126 INFO L225 Difference]: With dead ends: 152 [2022-01-31 00:54:19,126 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 00:54:19,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 00:54:19,127 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 122 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 00:54:19,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 56 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 00:54:19,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 00:54:19,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2022-01-31 00:54:19,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 89 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:54:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2022-01-31 00:54:19,144 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 54 [2022-01-31 00:54:19,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:54:19,144 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2022-01-31 00:54:19,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0833333333333335) internal successors, (74), 23 states have internal predecessors, (74), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:54:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2022-01-31 00:54:19,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 00:54:19,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:54:19,145 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:54:19,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 00:54:19,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:54:19,368 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:54:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:54:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash 729071824, now seen corresponding path program 10 times [2022-01-31 00:54:19,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:54:19,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965240542] [2022-01-31 00:54:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:19,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:54:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:19,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:54:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:19,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 00:54:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:19,526 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 29 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:54:19,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:54:19,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965240542] [2022-01-31 00:54:19,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965240542] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 00:54:19,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425646241] [2022-01-31 00:54:19,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 00:54:19,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:54:19,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:54:19,527 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) [2022-01-31 00:54:19,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 00:54:19,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 00:54:19,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:54:19,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-31 00:54:19,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:54:19,680 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-01-31 00:54:19,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 00:54:19,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425646241] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 00:54:19,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 00:54:19,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [17] total 18 [2022-01-31 00:54:19,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932636184] [2022-01-31 00:54:19,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 00:54:19,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 00:54:19,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:54:19,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 00:54:19,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-31 00:54:19,681 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:54:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:54:19,750 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2022-01-31 00:54:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 00:54:19,751 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2022-01-31 00:54:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:54:19,751 INFO L225 Difference]: With dead ends: 106 [2022-01-31 00:54:19,752 INFO L226 Difference]: Without dead ends: 94 [2022-01-31 00:54:19,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-31 00:54:19,752 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 00:54:19,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 35 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 00:54:19,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-01-31 00:54:19,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2022-01-31 00:54:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 80 states have (on average 1.0875) internal successors, (87), 80 states have internal predecessors, (87), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:54:19,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 93 transitions. [2022-01-31 00:54:19,767 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 93 transitions. Word has length 54 [2022-01-31 00:54:19,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:54:19,767 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 93 transitions. [2022-01-31 00:54:19,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:54:19,767 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 93 transitions. [2022-01-31 00:54:19,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 00:54:19,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:54:19,768 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:54:19,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-31 00:54:19,979 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,SelfDestructingSolverStorable12 [2022-01-31 00:54:19,979 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:54:19,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:54:19,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1194560873, now seen corresponding path program 11 times [2022-01-31 00:54:19,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:54:19,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624555387] [2022-01-31 00:54:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:19,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:54:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:20,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:54:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:20,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 00:54:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 35 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:54:20,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:54:20,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624555387] [2022-01-31 00:54:20,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624555387] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 00:54:20,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765244468] [2022-01-31 00:54:20,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 00:54:20,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:54:20,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:54:20,144 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) [2022-01-31 00:54:20,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 00:54:20,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-01-31 00:54:20,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:54:20,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-31 00:54:20,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:54:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 58 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:54:20,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:54:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 51 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:54:20,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765244468] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 00:54:20,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 00:54:20,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 27 [2022-01-31 00:54:20,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553045066] [2022-01-31 00:54:20,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 00:54:20,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 00:54:20,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 00:54:20,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 00:54:20,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-01-31 00:54:20,659 INFO L87 Difference]: Start difference. First operand 87 states and 93 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:54:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 00:54:21,218 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2022-01-31 00:54:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 00:54:21,219 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2022-01-31 00:54:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 00:54:21,219 INFO L225 Difference]: With dead ends: 122 [2022-01-31 00:54:21,220 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 00:54:21,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=462, Invalid=1794, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 00:54:21,221 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 107 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 00:54:21,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 82 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 00:54:21,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 00:54:21,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 67. [2022-01-31 00:54:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 00:54:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-01-31 00:54:21,231 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 54 [2022-01-31 00:54:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 00:54:21,231 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-01-31 00:54:21,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 00:54:21,232 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-01-31 00:54:21,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 00:54:21,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 00:54:21,232 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 00:54:21,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 00:54:21,450 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,SelfDestructingSolverStorable13 [2022-01-31 00:54:21,452 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 00:54:21,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 00:54:21,453 INFO L85 PathProgramCache]: Analyzing trace with hash -14807905, now seen corresponding path program 12 times [2022-01-31 00:54:21,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 00:54:21,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528281951] [2022-01-31 00:54:21,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 00:54:21,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 00:54:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:23,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 00:54:23,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:23,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 00:54:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 00:54:23,211 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 00:54:23,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 00:54:23,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528281951] [2022-01-31 00:54:23,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528281951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 00:54:23,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836081073] [2022-01-31 00:54:23,211 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 00:54:23,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 00:54:23,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 00:54:23,212 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) [2022-01-31 00:54:23,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 00:54:23,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-01-31 00:54:23,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 00:54:23,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 63 conjunts are in the unsatisfiable core [2022-01-31 00:54:23,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 00:54:23,383 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 15 treesize of output 11 [2022-01-31 00:54:23,491 INFO L353 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-01-31 00:54:23,491 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 28 treesize of output 27 [2022-01-31 00:54:23,620 INFO L353 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2022-01-31 00:54:23,620 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 40 treesize of output 42 [2022-01-31 00:54:23,774 INFO L353 Elim1Store]: treesize reduction 171, result has 17.8 percent of original size [2022-01-31 00:54:23,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 57 [2022-01-31 00:54:24,037 INFO L353 Elim1Store]: treesize reduction 264, result has 15.7 percent of original size [2022-01-31 00:54:24,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 72 [2022-01-31 00:54:24,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:24,456 INFO L353 Elim1Store]: treesize reduction 176, result has 0.6 percent of original size [2022-01-31 00:54:24,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 71 treesize of output 82 [2022-01-31 00:54:24,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:24,724 INFO L353 Elim1Store]: treesize reduction 260, result has 0.4 percent of original size [2022-01-31 00:54:24,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 95 treesize of output 101 [2022-01-31 00:54:24,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:25,008 INFO L353 Elim1Store]: treesize reduction 366, result has 0.3 percent of original size [2022-01-31 00:54:25,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 104 treesize of output 113 [2022-01-31 00:54:25,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:25,329 INFO L353 Elim1Store]: treesize reduction 490, result has 0.2 percent of original size [2022-01-31 00:54:25,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 115 treesize of output 127 [2022-01-31 00:54:25,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:25,659 INFO L353 Elim1Store]: treesize reduction 632, result has 0.2 percent of original size [2022-01-31 00:54:25,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 125 treesize of output 140 [2022-01-31 00:54:26,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:26,166 INFO L353 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2022-01-31 00:54:26,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 135 treesize of output 153 [2022-01-31 00:54:30,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 00:54:30,191 INFO L353 Elim1Store]: treesize reduction 777, result has 2.0 percent of original size [2022-01-31 00:54:30,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 1 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 123 treesize of output 42 [2022-01-31 00:54:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 00:54:30,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 00:55:44,925 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_588 Int) (|main_~#sum~0.offset| Int) (v_ArrVal_586 Int) (v_ArrVal_596 Int) (v_ArrVal_584 Int) (v_ArrVal_594 Int) (v_ArrVal_592 Int) (v_ArrVal_591 Int) (v_main_~i~0_192 Int)) (let ((.cse0 (store |c_#memory_int| c_main_~a~0.base (let ((.cse3 (* c_main_~i~0 4))) (store (store (select |c_#memory_int| c_main_~a~0.base) (+ .cse3 c_main_~a~0.offset 4) v_ArrVal_584) (+ .cse3 c_main_~a~0.offset 8) v_ArrVal_586))))) (let ((.cse1 (select .cse0 |c_main_~#sum~0.base|)) (.cse2 (* 4 v_main_~i~0_192))) (or (not (<= v_ArrVal_584 1)) (<= (+ v_ArrVal_596 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |main_~#sum~0.offset| v_ArrVal_596)) c_main_~a~0.base) (+ c_main_~a~0.offset .cse2 16))) (+ c_main_~i~0 3)) (< 0 v_ArrVal_588) (< (+ v_ArrVal_592 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |main_~#sum~0.offset| v_ArrVal_592)) c_main_~a~0.base) (+ c_main_~a~0.offset .cse2 8))) v_ArrVal_594) (<= c_main_~i~0 (+ v_main_~i~0_192 1)) (< (+ v_ArrVal_594 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |main_~#sum~0.offset| v_ArrVal_594)) c_main_~a~0.base) (+ c_main_~a~0.offset .cse2 12))) v_ArrVal_596) (< v_main_~i~0_192 1) (< 1 v_ArrVal_586) (<= (+ 3 v_main_~i~0_192) c_main_~i~0) (< (+ v_ArrVal_588 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |main_~#sum~0.offset| v_ArrVal_588)) c_main_~a~0.base) (+ c_main_~a~0.offset .cse2))) v_ArrVal_591) (< (+ v_ArrVal_591 (select (select (store .cse0 |c_main_~#sum~0.base| (store .cse1 |main_~#sum~0.offset| v_ArrVal_591)) c_main_~a~0.base) (+ c_main_~a~0.offset .cse2 4))) v_ArrVal_592))))) is different from false