/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/loop-crafted/simple_array_index_value_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 15:42:09,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 15:42:09,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 15:42:09,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 15:42:09,899 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 [2022-02-14 15:42:09,926 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 15:42:09,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 15:42:09,927 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-14 15:42:09,927 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-14 15:42:09,927 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-14 15:42:09,928 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-14 15:42:09,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-14 15:42:09,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-14 15:42:09,928 INFO L138 SettingsManager]: * Use SBE=true [2022-02-14 15:42:09,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 15:42:09,929 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 15:42:09,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 15:42:09,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 15:42:09,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 15:42:09,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 15:42:09,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 15:42:09,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 15:42:09,930 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 15:42:09,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 15:42:09,930 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 15:42:09,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 15:42:09,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 15:42:09,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 15:42:09,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 15:42:09,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 15:42:09,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 15:42:09,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-14 15:42:09,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-14 15:42:09,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 15:42:09,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-14 15:42:09,932 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-14 15:42:09,932 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-02-14 15:42:09,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-14 15:42:09,933 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 15:42:10,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 15:42:10,173 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 15:42:10,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 15:42:10,176 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 15:42:10,178 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 15:42:10,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-02-14 15:42:10,234 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3668bafb/0b123fba16ab41d7a8dd5abb0ab16e73/FLAG8eed5a415 [2022-02-14 15:42:10,618 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 15:42:10,618 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-02-14 15:42:10,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3668bafb/0b123fba16ab41d7a8dd5abb0ab16e73/FLAG8eed5a415 [2022-02-14 15:42:11,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3668bafb/0b123fba16ab41d7a8dd5abb0ab16e73 [2022-02-14 15:42:11,017 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 15:42:11,018 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-14 15:42:11,020 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 15:42:11,020 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 15:42:11,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 15:42:11,023 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 03:42:11" (1/1) ... [2022-02-14 15:42:11,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b00da15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:42:11, skipping insertion in model container [2022-02-14 15:42:11,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 03:42:11" (1/1) ... [2022-02-14 15:42:11,029 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 15:42:11,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 15:42:11,171 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-02-14 15:42:11,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 15:42:11,192 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 15:42:11,218 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i[919,932] [2022-02-14 15:42:11,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 15:42:11,237 INFO L208 MainTranslator]: Completed translation [2022-02-14 15:42:11,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:42:11 WrapperNode [2022-02-14 15:42:11,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 15:42:11,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 15:42:11,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 15:42:11,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 15:42:11,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:42:11" (1/1) ... [2022-02-14 15:42:11,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:42:11" (1/1) ... [2022-02-14 15:42:11,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:42:11" (1/1) ... [2022-02-14 15:42:11,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:42:11" (1/1) ... [2022-02-14 15:42:11,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:42:11" (1/1) ... [2022-02-14 15:42:11,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:42:11" (1/1) ... [2022-02-14 15:42:11,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:42:11" (1/1) ... [2022-02-14 15:42:11,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 15:42:11,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 15:42:11,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 15:42:11,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 15:42:11,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:42:11" (1/1) ... [2022-02-14 15:42:11,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 15:42:11,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:42:11,312 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) [2022-02-14 15:42:11,337 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 [2022-02-14 15:42:11,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 15:42:11,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 15:42:11,351 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 15:42:11,352 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 15:42:11,352 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 15:42:11,353 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 15:42:11,353 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 15:42:11,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 15:42:11,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-14 15:42:11,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-14 15:42:11,353 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 15:42:11,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 15:42:11,354 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 15:42:11,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 15:42:11,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-14 15:42:11,354 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 15:42:11,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-14 15:42:11,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 15:42:11,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 15:42:11,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 15:42:11,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 15:42:11,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 15:42:11,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 15:42:11,408 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 15:42:11,410 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 15:42:11,507 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 15:42:11,512 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 15:42:11,512 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 15:42:11,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 03:42:11 BoogieIcfgContainer [2022-02-14 15:42:11,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 15:42:11,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 15:42:11,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 15:42:11,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 15:42:11,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 03:42:11" (1/3) ... [2022-02-14 15:42:11,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378f2cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 03:42:11, skipping insertion in model container [2022-02-14 15:42:11,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 03:42:11" (2/3) ... [2022-02-14 15:42:11,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378f2cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 03:42:11, skipping insertion in model container [2022-02-14 15:42:11,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 03:42:11" (3/3) ... [2022-02-14 15:42:11,522 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2022-02-14 15:42:11,526 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-14 15:42:11,526 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 15:42:11,595 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 15:42:11,601 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 [2022-02-14 15:42:11,601 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 15:42:11,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 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) [2022-02-14 15:42:11,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-14 15:42:11,650 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:42:11,650 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:42:11,651 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:42:11,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:42:11,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1210672905, now seen corresponding path program 1 times [2022-02-14 15:42:11,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:42:11,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472900510] [2022-02-14 15:42:11,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:42:11,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:42:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:11,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:42:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:42:11,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:42:11,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472900510] [2022-02-14 15:42:11,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472900510] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 15:42:11,921 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 15:42:11,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 15:42:11,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301618337] [2022-02-14 15:42:11,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 15:42:11,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 15:42:11,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:42:11,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 15:42:11,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 15:42:11,956 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 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 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 15:42:12,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:42:12,087 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-02-14 15:42:12,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 15:42:12,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-14 15:42:12,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:42:12,103 INFO L225 Difference]: With dead ends: 62 [2022-02-14 15:42:12,104 INFO L226 Difference]: Without dead ends: 33 [2022-02-14 15:42:12,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 15:42:12,113 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:42:12,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-14 15:42:12,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-14 15:42:12,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-02-14 15:42:12,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 15:42:12,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-02-14 15:42:12,163 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 13 [2022-02-14 15:42:12,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:42:12,163 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-02-14 15:42:12,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 15:42:12,164 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-02-14 15:42:12,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-14 15:42:12,165 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:42:12,165 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] [2022-02-14 15:42:12,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 15:42:12,166 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:42:12,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:42:12,170 INFO L85 PathProgramCache]: Analyzing trace with hash 778735204, now seen corresponding path program 1 times [2022-02-14 15:42:12,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:42:12,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270929895] [2022-02-14 15:42:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:42:12,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:42:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:12,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:42:12,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:12,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 15:42:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:42:12,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:42:12,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270929895] [2022-02-14 15:42:12,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270929895] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:42:12,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814178232] [2022-02-14 15:42:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:42:12,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:42:12,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:42:12,334 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) [2022-02-14 15:42:12,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 15:42:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:12,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-14 15:42:12,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:42:12,525 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 [2022-02-14 15:42:12,603 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-02-14 15:42:12,603 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 37 treesize of output 22 [2022-02-14 15:42:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:42:12,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:42:13,002 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 45 treesize of output 41 [2022-02-14 15:42:13,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-14 15:42:13,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 48 [2022-02-14 15:42:13,056 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 12 treesize of output 4 [2022-02-14 15:42:13,089 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 13 treesize of output 4 [2022-02-14 15:42:13,128 INFO L353 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2022-02-14 15:42:13,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 50 [2022-02-14 15:42:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 15:42:13,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814178232] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:42:13,488 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:42:13,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 12] total 20 [2022-02-14 15:42:13,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247284248] [2022-02-14 15:42:13,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:42:13,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-14 15:42:13,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:42:13,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-14 15:42:13,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-02-14 15:42:13,496 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 15:42:13,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:42:13,900 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-02-14 15:42:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-14 15:42:13,901 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-02-14 15:42:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:42:13,902 INFO L225 Difference]: With dead ends: 52 [2022-02-14 15:42:13,902 INFO L226 Difference]: Without dead ends: 41 [2022-02-14 15:42:13,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-02-14 15:42:13,904 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:42:13,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 69 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 264 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-02-14 15:42:13,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-14 15:42:13,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2022-02-14 15:42:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-14 15:42:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-02-14 15:42:13,912 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2022-02-14 15:42:13,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:42:13,912 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-02-14 15:42:13,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 15:42:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-02-14 15:42:13,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-14 15:42:13,914 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:42:13,914 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:42:13,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 15:42:14,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:42:14,115 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:42:14,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:42:14,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1692936895, now seen corresponding path program 2 times [2022-02-14 15:42:14,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:42:14,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728295832] [2022-02-14 15:42:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:42:14,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:42:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:14,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:42:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:14,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 15:42:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:14,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 15:42:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 15:42:14,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:42:14,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728295832] [2022-02-14 15:42:14,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728295832] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:42:14,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700080348] [2022-02-14 15:42:14,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:42:14,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:42:14,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:42:14,241 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) [2022-02-14 15:42:14,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 15:42:14,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:42:14,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:42:14,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-14 15:42:14,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:42:14,348 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 [2022-02-14 15:42:14,603 INFO L353 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-02-14 15:42:14,603 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 45 treesize of output 48 [2022-02-14 15:42:15,010 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-02-14 15:42:15,011 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 37 treesize of output 22 [2022-02-14 15:42:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-14 15:42:15,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:42:18,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700080348] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:42:18,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 15:42:18,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16] total 19 [2022-02-14 15:42:18,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521570372] [2022-02-14 15:42:18,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 15:42:18,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-14 15:42:18,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:42:18,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-14 15:42:18,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=470, Unknown=2, NotChecked=0, Total=552 [2022-02-14 15:42:18,820 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-14 15:42:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:42:19,384 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-02-14 15:42:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-14 15:42:19,384 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-02-14 15:42:19,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:42:19,386 INFO L225 Difference]: With dead ends: 66 [2022-02-14 15:42:19,387 INFO L226 Difference]: Without dead ends: 55 [2022-02-14 15:42:19,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=257, Invalid=1547, Unknown=2, NotChecked=0, Total=1806 [2022-02-14 15:42:19,389 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 42 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:42:19,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 71 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 165 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2022-02-14 15:42:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-14 15:42:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2022-02-14 15:42:19,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-14 15:42:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-02-14 15:42:19,398 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 29 [2022-02-14 15:42:19,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:42:19,399 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-02-14 15:42:19,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.0) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-02-14 15:42:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-02-14 15:42:19,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-14 15:42:19,400 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:42:19,400 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:42:19,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 15:42:19,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-02-14 15:42:19,615 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:42:19,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:42:19,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1452373648, now seen corresponding path program 1 times [2022-02-14 15:42:19,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:42:19,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098372264] [2022-02-14 15:42:19,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:42:19,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:42:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:19,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:42:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:19,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 15:42:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:19,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 15:42:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:19,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:42:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:19,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-14 15:42:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-02-14 15:42:19,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:42:19,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098372264] [2022-02-14 15:42:19,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098372264] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:42:19,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606773894] [2022-02-14 15:42:19,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:42:19,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:42:19,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:42:19,743 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) [2022-02-14 15:42:19,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 15:42:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:19,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 15:42:19,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:42:19,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-02-14 15:42:19,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 56 [2022-02-14 15:42:19,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-02-14 15:42:19,960 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 55 treesize of output 28 [2022-02-14 15:42:20,673 INFO L353 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-02-14 15:42:20,673 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 56 treesize of output 57 [2022-02-14 15:42:21,654 INFO L353 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-02-14 15:42:21,660 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 48 treesize of output 21 [2022-02-14 15:42:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-14 15:42:21,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:42:28,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606773894] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:42:28,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 15:42:28,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 18] total 21 [2022-02-14 15:42:28,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266688591] [2022-02-14 15:42:28,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 15:42:28,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-14 15:42:28,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:42:28,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-14 15:42:28,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=598, Unknown=3, NotChecked=0, Total=702 [2022-02-14 15:42:28,174 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-02-14 15:42:28,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:42:28,594 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-02-14 15:42:28,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-14 15:42:28,594 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2022-02-14 15:42:28,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:42:28,595 INFO L225 Difference]: With dead ends: 79 [2022-02-14 15:42:28,595 INFO L226 Difference]: Without dead ends: 62 [2022-02-14 15:42:28,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=209, Invalid=1348, Unknown=3, NotChecked=0, Total=1560 [2022-02-14 15:42:28,597 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-14 15:42:28,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 171 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 138 Invalid, 0 Unknown, 150 Unchecked, 0.1s Time] [2022-02-14 15:42:28,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-14 15:42:28,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-02-14 15:42:28,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-02-14 15:42:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-02-14 15:42:28,608 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 45 [2022-02-14 15:42:28,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:42:28,608 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-02-14 15:42:28,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 8 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-02-14 15:42:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-02-14 15:42:28,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-14 15:42:28,610 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:42:28,610 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:42:28,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 15:42:28,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:42:28,824 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:42:28,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:42:28,824 INFO L85 PathProgramCache]: Analyzing trace with hash 345870625, now seen corresponding path program 2 times [2022-02-14 15:42:28,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:42:28,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41051717] [2022-02-14 15:42:28,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:42:28,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:42:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:28,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:42:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:28,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 15:42:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:28,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 15:42:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:28,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:42:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:29,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:42:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:29,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-02-14 15:42:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:29,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:42:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-02-14 15:42:29,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:42:29,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41051717] [2022-02-14 15:42:29,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41051717] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:42:29,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906617966] [2022-02-14 15:42:29,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 15:42:29,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:42:29,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:42:29,038 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) [2022-02-14 15:42:29,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 15:42:29,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 15:42:29,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:42:29,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-02-14 15:42:29,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:42:29,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-02-14 15:42:29,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 56 [2022-02-14 15:42:29,282 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-02-14 15:42:29,304 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 55 treesize of output 28 [2022-02-14 15:42:31,473 INFO L353 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-02-14 15:42:31,473 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 56 treesize of output 57 [2022-02-14 15:42:32,775 INFO L353 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-02-14 15:42:32,776 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 48 treesize of output 21 [2022-02-14 15:42:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-14 15:42:32,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:42:36,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906617966] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:42:36,906 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 15:42:36,906 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 20] total 23 [2022-02-14 15:42:36,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402023194] [2022-02-14 15:42:36,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 15:42:36,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-14 15:42:36,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:42:36,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-14 15:42:36,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=751, Unknown=4, NotChecked=0, Total=870 [2022-02-14 15:42:36,909 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-14 15:42:39,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:42:39,942 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2022-02-14 15:42:39,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-14 15:42:39,943 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 61 [2022-02-14 15:42:39,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:42:39,944 INFO L225 Difference]: With dead ends: 111 [2022-02-14 15:42:39,944 INFO L226 Difference]: Without dead ends: 86 [2022-02-14 15:42:39,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=238, Invalid=1737, Unknown=5, NotChecked=0, Total=1980 [2022-02-14 15:42:39,946 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 57 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:42:39,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 193 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 263 Invalid, 0 Unknown, 242 Unchecked, 0.2s Time] [2022-02-14 15:42:39,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-14 15:42:39,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-02-14 15:42:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 15:42:39,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-02-14 15:42:39,960 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 61 [2022-02-14 15:42:39,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:42:39,960 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-02-14 15:42:39,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 10 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-02-14 15:42:39,961 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-02-14 15:42:39,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-14 15:42:39,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:42:39,962 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:42:39,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 15:42:40,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:42:40,163 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:42:40,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:42:40,164 INFO L85 PathProgramCache]: Analyzing trace with hash 648561106, now seen corresponding path program 3 times [2022-02-14 15:42:40,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:42:40,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376985032] [2022-02-14 15:42:40,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:42:40,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:42:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:40,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:42:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:40,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 15:42:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:40,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 15:42:40,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:40,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:42:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:40,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:42:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:40,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:42:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:40,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-02-14 15:42:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:40,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:42:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:40,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 15:42:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-02-14 15:42:40,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:42:40,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376985032] [2022-02-14 15:42:40,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376985032] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:42:40,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032269959] [2022-02-14 15:42:40,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 15:42:40,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:42:40,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:42:40,368 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) [2022-02-14 15:42:40,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 15:42:40,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-02-14 15:42:40,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:42:40,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjunts are in the unsatisfiable core [2022-02-14 15:42:40,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:42:40,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-02-14 15:42:40,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 15:42:40,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 56 [2022-02-14 15:42:41,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-02-14 15:42:41,021 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 57 treesize of output 30 [2022-02-14 15:42:41,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 95 [2022-02-14 15:42:41,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 15:42:41,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 15:42:41,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 15:42:41,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 104 [2022-02-14 15:42:41,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-14 15:42:41,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 47 [2022-02-14 15:42:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-02-14 15:42:41,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:42:44,225 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 45 treesize of output 41 [2022-02-14 15:42:44,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-14 15:42:44,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-14 15:42:44,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 48 [2022-02-14 15:42:44,273 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 13 treesize of output 4 [2022-02-14 15:42:44,302 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-02-14 15:42:44,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-02-14 15:42:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-02-14 15:42:44,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032269959] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:42:44,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:42:44,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 21] total 43 [2022-02-14 15:42:44,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552531967] [2022-02-14 15:42:44,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:42:44,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-14 15:42:44,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:42:44,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-14 15:42:44,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-02-14 15:42:44,689 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-02-14 15:42:50,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:42:50,211 INFO L93 Difference]: Finished difference Result 225 states and 259 transitions. [2022-02-14 15:42:50,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-14 15:42:50,212 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 77 [2022-02-14 15:42:50,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:42:50,214 INFO L225 Difference]: With dead ends: 225 [2022-02-14 15:42:50,214 INFO L226 Difference]: Without dead ends: 192 [2022-02-14 15:42:50,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1960 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1053, Invalid=6087, Unknown=0, NotChecked=0, Total=7140 [2022-02-14 15:42:50,216 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 326 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 2393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:42:50,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 119 Invalid, 2393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 1822 Invalid, 0 Unknown, 169 Unchecked, 2.2s Time] [2022-02-14 15:42:50,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-14 15:42:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 127. [2022-02-14 15:42:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.086021505376344) internal successors, (101), 95 states have internal predecessors, (101), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-02-14 15:42:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 144 transitions. [2022-02-14 15:42:50,249 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 144 transitions. Word has length 77 [2022-02-14 15:42:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:42:50,249 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 144 transitions. [2022-02-14 15:42:50,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 38 states have internal predecessors, (88), 21 states have call successors, (24), 5 states have call predecessors, (24), 4 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-02-14 15:42:50,249 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 144 transitions. [2022-02-14 15:42:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-14 15:42:50,251 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:42:50,251 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:42:50,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 15:42:50,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:42:50,457 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:42:50,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:42:50,457 INFO L85 PathProgramCache]: Analyzing trace with hash 616668035, now seen corresponding path program 4 times [2022-02-14 15:42:50,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:42:50,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670279245] [2022-02-14 15:42:50,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:42:50,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:42:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:50,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:42:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:50,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 15:42:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:50,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 15:42:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:50,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:42:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:50,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:42:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:50,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:42:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:50,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:42:50,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:50,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-02-14 15:42:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:50,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-02-14 15:42:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:50,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-02-14 15:42:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:50,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-02-14 15:42:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-02-14 15:42:50,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:42:50,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670279245] [2022-02-14 15:42:50,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670279245] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:42:50,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121272222] [2022-02-14 15:42:50,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 15:42:50,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:42:50,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:42:50,594 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) [2022-02-14 15:42:50,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 15:42:51,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 15:42:51,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:42:51,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-14 15:42:51,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:42:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-02-14 15:42:51,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:42:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-02-14 15:42:51,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121272222] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:42:51,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:42:51,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-02-14 15:42:51,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901673463] [2022-02-14 15:42:51,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:42:51,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-14 15:42:51,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:42:51,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-14 15:42:51,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-02-14 15:42:51,643 INFO L87 Difference]: Start difference. First operand 127 states and 144 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-02-14 15:42:52,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:42:52,917 INFO L93 Difference]: Finished difference Result 211 states and 242 transitions. [2022-02-14 15:42:52,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-14 15:42:52,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 93 [2022-02-14 15:42:52,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:42:52,919 INFO L225 Difference]: With dead ends: 211 [2022-02-14 15:42:52,919 INFO L226 Difference]: Without dead ends: 159 [2022-02-14 15:42:52,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-02-14 15:42:52,920 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 203 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 15:42:52,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 84 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 15:42:52,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-02-14 15:42:52,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 116. [2022-02-14 15:42:52,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 86 states have internal predecessors, (87), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-02-14 15:42:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2022-02-14 15:42:52,951 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 93 [2022-02-14 15:42:52,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:42:52,952 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2022-02-14 15:42:52,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-02-14 15:42:52,952 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2022-02-14 15:42:52,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-14 15:42:52,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:42:52,956 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:42:52,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-14 15:42:53,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:42:53,157 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:42:53,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:42:53,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1102839803, now seen corresponding path program 5 times [2022-02-14 15:42:53,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:42:53,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610052951] [2022-02-14 15:42:53,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:42:53,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:42:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:42:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 15:42:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 15:42:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:42:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:42:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:42:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:42:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:42:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:42:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:42:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 15:42:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 15:42:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 15:42:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 15:42:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:42:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-02-14 15:42:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-02-14 15:42:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-02-14 15:42:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:42:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-02-14 15:42:53,476 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:42:53,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610052951] [2022-02-14 15:42:53,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610052951] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:42:53,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445661942] [2022-02-14 15:42:53,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 15:42:53,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:42:53,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:42:53,480 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) [2022-02-14 15:42:53,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 15:43:29,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-02-14 15:43:29,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 15:43:29,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-14 15:43:29,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 15:43:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-02-14 15:43:29,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 15:43:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-02-14 15:43:30,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445661942] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 15:43:30,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 15:43:30,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-02-14 15:43:30,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738603331] [2022-02-14 15:43:30,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 15:43:30,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-14 15:43:30,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 15:43:30,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-14 15:43:30,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2022-02-14 15:43:30,095 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-02-14 15:43:47,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 15:43:47,069 INFO L93 Difference]: Finished difference Result 320 states and 388 transitions. [2022-02-14 15:43:47,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-14 15:43:47,069 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) Word has length 149 [2022-02-14 15:43:47,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 15:43:47,072 INFO L225 Difference]: With dead ends: 320 [2022-02-14 15:43:47,072 INFO L226 Difference]: Without dead ends: 287 [2022-02-14 15:43:47,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=1115, Invalid=2917, Unknown=0, NotChecked=0, Total=4032 [2022-02-14 15:43:47,073 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 667 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2929 mSolverCounterSat, 729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 3658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 729 IncrementalHoareTripleChecker+Valid, 2929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-14 15:43:47,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 148 Invalid, 3658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [729 Valid, 2929 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-14 15:43:47,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-14 15:43:47,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 180. [2022-02-14 15:43:47,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 134 states have internal predecessors, (135), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-02-14 15:43:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2022-02-14 15:43:47,119 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 149 [2022-02-14 15:43:47,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 15:43:47,124 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2022-02-14 15:43:47,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 33 states have internal predecessors, (108), 30 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-02-14 15:43:47,125 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2022-02-14 15:43:47,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-02-14 15:43:47,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 15:43:47,128 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 15:43:47,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-02-14 15:43:47,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:43:47,340 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 15:43:47,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 15:43:47,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1415471691, now seen corresponding path program 6 times [2022-02-14 15:43:47,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 15:43:47,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951047065] [2022-02-14 15:43:47,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 15:43:47,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 15:43:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 15:43:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-02-14 15:43:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-02-14 15:43:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-02-14 15:43:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-02-14 15:43:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-02-14 15:43:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-02-14 15:43:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-02-14 15:43:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-02-14 15:43:48,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-02-14 15:43:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-02-14 15:43:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-02-14 15:43:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-02-14 15:43:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-02-14 15:43:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-02-14 15:43:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-02-14 15:43:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-02-14 15:43:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-02-14 15:43:48,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-02-14 15:43:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-02-14 15:43:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-02-14 15:43:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-02-14 15:43:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-02-14 15:43:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-02-14 15:43:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-02-14 15:43:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-02-14 15:43:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-02-14 15:43:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-02-14 15:43:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-02-14 15:43:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-02-14 15:43:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-02-14 15:43:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2022-02-14 15:43:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-02-14 15:43:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-02-14 15:43:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 15:43:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 6 proven. 1770 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-02-14 15:43:48,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 15:43:48,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951047065] [2022-02-14 15:43:48,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951047065] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 15:43:48,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440178168] [2022-02-14 15:43:48,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 15:43:48,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 15:43:48,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 15:43:48,252 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) [2022-02-14 15:43:48,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process