/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-d966a43 [2022-01-31 02:25:03,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 02:25:03,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 02:25:03,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 02:25:03,546 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-31 02:25:03,574 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 02:25:03,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 02:25:03,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 02:25:03,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 02:25:03,577 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 02:25:03,578 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 02:25:03,578 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 02:25:03,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 02:25:03,579 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 02:25:03,579 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 02:25:03,579 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 02:25:03,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 02:25:03,580 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 02:25:03,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 02:25:03,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 02:25:03,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 02:25:03,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 02:25:03,580 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 02:25:03,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 02:25:03,580 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 02:25:03,580 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 02:25:03,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 02:25:03,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 02:25:03,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 02:25:03,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 02:25:03,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 02:25:03,581 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 02:25:03,581 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 02:25:03,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 02:25:03,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 02:25:03,582 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 02:25:03,582 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 02:25:03,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 02:25:03,582 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 02:25:03,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 02:25:03,796 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 02:25:03,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 02:25:03,798 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 02:25:03,802 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 02:25:03,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-01-31 02:25:03,856 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae92dd630/f2d0bb85b2424f589481ab82d34ccfa6/FLAG6f564d6f5 [2022-01-31 02:25:04,271 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 02:25:04,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_2.i [2022-01-31 02:25:04,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae92dd630/f2d0bb85b2424f589481ab82d34ccfa6/FLAG6f564d6f5 [2022-01-31 02:25:04,293 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae92dd630/f2d0bb85b2424f589481ab82d34ccfa6 [2022-01-31 02:25:04,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 02:25:04,298 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 02:25:04,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 02:25:04,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 02:25:04,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 02:25:04,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:25:04" (1/1) ... [2022-01-31 02:25:04,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7243db48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:04, skipping insertion in model container [2022-01-31 02:25:04,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 02:25:04" (1/1) ... [2022-01-31 02:25:04,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 02:25:04,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 02:25:04,476 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] [2022-01-31 02:25:04,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 02:25:04,494 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 02:25:04,514 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] [2022-01-31 02:25:04,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 02:25:04,526 INFO L208 MainTranslator]: Completed translation [2022-01-31 02:25:04,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:04 WrapperNode [2022-01-31 02:25:04,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 02:25:04,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 02:25:04,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 02:25:04,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 02:25:04,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:04" (1/1) ... [2022-01-31 02:25:04,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:04" (1/1) ... [2022-01-31 02:25:04,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:04" (1/1) ... [2022-01-31 02:25:04,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:04" (1/1) ... [2022-01-31 02:25:04,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:04" (1/1) ... [2022-01-31 02:25:04,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:04" (1/1) ... [2022-01-31 02:25:04,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:04" (1/1) ... [2022-01-31 02:25:04,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 02:25:04,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 02:25:04,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 02:25:04,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 02:25:04,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:04" (1/1) ... [2022-01-31 02:25:04,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 02:25:04,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:25:04,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 02:25:04,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 02:25:04,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 02:25:04,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 02:25:04,605 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 02:25:04,605 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 02:25:04,605 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 02:25:04,607 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 02:25:04,607 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 02:25:04,607 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 02:25:04,607 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 02:25:04,607 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 02:25:04,607 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 02:25:04,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 02:25:04,607 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 02:25:04,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 02:25:04,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-01-31 02:25:04,608 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 02:25:04,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 02:25:04,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 02:25:04,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 02:25:04,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 02:25:04,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 02:25:04,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 02:25:04,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 02:25:04,664 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 02:25:04,666 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 02:25:04,760 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 02:25:04,765 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 02:25:04,765 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 02:25:04,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:25:04 BoogieIcfgContainer [2022-01-31 02:25:04,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 02:25:04,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 02:25:04,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 02:25:04,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 02:25:04,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 02:25:04" (1/3) ... [2022-01-31 02:25:04,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3eabe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:25:04, skipping insertion in model container [2022-01-31 02:25:04,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 02:25:04" (2/3) ... [2022-01-31 02:25:04,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3eabe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 02:25:04, skipping insertion in model container [2022-01-31 02:25:04,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 02:25:04" (3/3) ... [2022-01-31 02:25:04,772 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_2.i [2022-01-31 02:25:04,776 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 02:25:04,776 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 02:25:04,808 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 02:25:04,813 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 02:25:04,813 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 02:25:04,825 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) [2022-01-31 02:25:04,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 02:25:04,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:25:04,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:25:04,831 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:25:04,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:25:04,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1210672905, now seen corresponding path program 1 times [2022-01-31 02:25:04,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:25:04,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042538451] [2022-01-31 02:25:04,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:04,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:25:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:05,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:25:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:25:05,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:25:05,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042538451] [2022-01-31 02:25:05,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042538451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 02:25:05,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 02:25:05,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 02:25:05,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639995082] [2022-01-31 02:25:05,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 02:25:05,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 02:25:05,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:25:05,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 02:25:05,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 02:25:05,176 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) [2022-01-31 02:25:05,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:25:05,326 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-01-31 02:25:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 02:25:05,329 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 [2022-01-31 02:25:05,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:25:05,338 INFO L225 Difference]: With dead ends: 62 [2022-01-31 02:25:05,339 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 02:25:05,342 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 [2022-01-31 02:25:05,347 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 [2022-01-31 02:25:05,349 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] [2022-01-31 02:25:05,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 02:25:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-01-31 02:25:05,387 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) [2022-01-31 02:25:05,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-01-31 02:25:05,389 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 13 [2022-01-31 02:25:05,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:25:05,389 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-01-31 02:25:05,390 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) [2022-01-31 02:25:05,390 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-01-31 02:25:05,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 02:25:05,391 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:25:05,392 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 02:25:05,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 02:25:05,393 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:25:05,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:25:05,397 INFO L85 PathProgramCache]: Analyzing trace with hash 778735204, now seen corresponding path program 1 times [2022-01-31 02:25:05,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:25:05,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083734479] [2022-01-31 02:25:05,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:05,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:25:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:05,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:25:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:05,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 02:25:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:25:05,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:25:05,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083734479] [2022-01-31 02:25:05,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083734479] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:25:05,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864626325] [2022-01-31 02:25:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:05,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:05,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:25:05,569 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:25:05,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 02:25:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:05,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjunts are in the unsatisfiable core [2022-01-31 02:25:05,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:25:05,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 02:25:06,011 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 02:25:06,012 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 [2022-01-31 02:25:06,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:25:06,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:25:06,391 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 [2022-01-31 02:25:06,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 02:25:06,406 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 [2022-01-31 02:25:06,439 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 [2022-01-31 02:25:06,464 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 [2022-01-31 02:25:06,499 INFO L353 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2022-01-31 02:25:06,500 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 [2022-01-31 02:25:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 02:25:06,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864626325] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:25:06,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:25:06,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 12] total 20 [2022-01-31 02:25:06,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799973792] [2022-01-31 02:25:06,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:25:06,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 02:25:06,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:25:06,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 02:25:06,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-31 02:25:06,822 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) [2022-01-31 02:25:07,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:25:07,194 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-01-31 02:25:07,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 02:25:07,195 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 [2022-01-31 02:25:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:25:07,196 INFO L225 Difference]: With dead ends: 52 [2022-01-31 02:25:07,196 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 02:25:07,197 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 [2022-01-31 02:25:07,198 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 [2022-01-31 02:25:07,198 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] [2022-01-31 02:25:07,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 02:25:07,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2022-01-31 02:25:07,207 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) [2022-01-31 02:25:07,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-01-31 02:25:07,208 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2022-01-31 02:25:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:25:07,209 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-01-31 02:25:07,209 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) [2022-01-31 02:25:07,209 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-01-31 02:25:07,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 02:25:07,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:25:07,213 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] [2022-01-31 02:25:07,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 02:25:07,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:07,424 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:25:07,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:25:07,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1692936895, now seen corresponding path program 2 times [2022-01-31 02:25:07,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:25:07,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568800660] [2022-01-31 02:25:07,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:07,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:25:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:07,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:25:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:07,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 02:25:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:07,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 02:25:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 02:25:07,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:25:07,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568800660] [2022-01-31 02:25:07,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568800660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:25:07,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432389311] [2022-01-31 02:25:07,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:25:07,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:07,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:25:07,552 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:25:07,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 02:25:07,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:25:07,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:25:07,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-31 02:25:07,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:25:07,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-01-31 02:25:07,971 INFO L353 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-01-31 02:25:07,971 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 [2022-01-31 02:25:08,433 INFO L353 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-01-31 02:25:08,433 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 [2022-01-31 02:25:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-31 02:25:08,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:25:12,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432389311] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:25:12,347 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 02:25:12,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16] total 19 [2022-01-31 02:25:12,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754149075] [2022-01-31 02:25:12,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 02:25:12,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 02:25:12,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:25:12,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 02:25:12,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=470, Unknown=2, NotChecked=0, Total=552 [2022-01-31 02:25:12,348 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) [2022-01-31 02:25:12,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:25:12,899 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-01-31 02:25:12,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 02:25:12,899 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 [2022-01-31 02:25:12,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:25:12,901 INFO L225 Difference]: With dead ends: 66 [2022-01-31 02:25:12,901 INFO L226 Difference]: Without dead ends: 55 [2022-01-31 02:25:12,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=257, Invalid=1547, Unknown=2, NotChecked=0, Total=1806 [2022-01-31 02:25:12,903 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 [2022-01-31 02:25:12,903 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] [2022-01-31 02:25:12,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-01-31 02:25:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2022-01-31 02:25:12,910 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) [2022-01-31 02:25:12,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-01-31 02:25:12,911 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 29 [2022-01-31 02:25:12,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:25:12,911 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-01-31 02:25:12,911 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) [2022-01-31 02:25:12,911 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-01-31 02:25:12,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 02:25:12,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:25:12,912 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] [2022-01-31 02:25:12,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 02:25:13,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-31 02:25:13,131 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:25:13,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:25:13,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1452373648, now seen corresponding path program 1 times [2022-01-31 02:25:13,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:25:13,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164678432] [2022-01-31 02:25:13,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:13,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:25:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:13,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:25:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:13,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 02:25:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:13,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 02:25:13,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:13,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 02:25:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:13,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-01-31 02:25:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 02:25:13,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:25:13,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164678432] [2022-01-31 02:25:13,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164678432] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:25:13,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872536999] [2022-01-31 02:25:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:13,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:13,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:25:13,293 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:25:13,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 02:25:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:13,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-31 02:25:13,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:25:13,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-01-31 02:25:13,484 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 [2022-01-31 02:25:13,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 02:25:13,528 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 [2022-01-31 02:25:14,246 INFO L353 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-01-31 02:25:14,246 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 [2022-01-31 02:25:17,789 INFO L353 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-01-31 02:25:17,792 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 [2022-01-31 02:25:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 02:25:17,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:25:22,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872536999] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:25:22,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 02:25:22,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 19] total 22 [2022-01-31 02:25:22,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515563946] [2022-01-31 02:25:22,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 02:25:22,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 02:25:22,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:25:22,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 02:25:22,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=640, Unknown=3, NotChecked=0, Total=756 [2022-01-31 02:25:22,346 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 22 states, 20 states have (on average 2.4) internal successors, (48), 18 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) [2022-01-31 02:25:22,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:25:22,922 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-01-31 02:25:22,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 02:25:22,922 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.4) internal successors, (48), 18 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 [2022-01-31 02:25:22,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:25:22,924 INFO L225 Difference]: With dead ends: 79 [2022-01-31 02:25:22,924 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 02:25:22,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=222, Invalid=1415, Unknown=3, NotChecked=0, Total=1640 [2022-01-31 02:25:22,926 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 02:25:22,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 184 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 152 Invalid, 0 Unknown, 140 Unchecked, 0.2s Time] [2022-01-31 02:25:22,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 02:25:22,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-01-31 02:25:22,936 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) [2022-01-31 02:25:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-01-31 02:25:22,937 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 45 [2022-01-31 02:25:22,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:25:22,937 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-01-31 02:25:22,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.4) internal successors, (48), 18 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) [2022-01-31 02:25:22,937 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-01-31 02:25:22,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 02:25:22,938 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:25:22,939 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] [2022-01-31 02:25:22,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 02:25:23,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:23,156 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:25:23,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:25:23,157 INFO L85 PathProgramCache]: Analyzing trace with hash 345870625, now seen corresponding path program 2 times [2022-01-31 02:25:23,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:25:23,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910449635] [2022-01-31 02:25:23,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:23,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:25:23,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:23,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:25:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:23,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 02:25:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:23,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 02:25:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:23,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 02:25:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:23,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 02:25:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:23,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-01-31 02:25:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:23,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 02:25:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-01-31 02:25:23,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:25:23,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910449635] [2022-01-31 02:25:23,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910449635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:25:23,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789653219] [2022-01-31 02:25:23,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 02:25:23,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:23,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:25:23,298 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:25:23,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 02:25:23,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 02:25:23,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:25:23,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-31 02:25:23,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:25:23,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-01-31 02:25:23,499 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 [2022-01-31 02:25:23,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 02:25:23,542 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 [2022-01-31 02:25:28,244 INFO L353 Elim1Store]: treesize reduction 39, result has 39.1 percent of original size [2022-01-31 02:25:28,244 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 [2022-01-31 02:25:30,077 INFO L353 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-01-31 02:25:30,077 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 [2022-01-31 02:25:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 02:25:30,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:25:36,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789653219] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:25:36,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 02:25:36,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 20] total 23 [2022-01-31 02:25:36,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576963958] [2022-01-31 02:25:36,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 02:25:36,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 02:25:36,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:25:36,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 02:25:36,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=748, Unknown=8, NotChecked=0, Total=870 [2022-01-31 02:25:36,880 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) [2022-01-31 02:25:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:25:39,661 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2022-01-31 02:25:39,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 02:25:39,661 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 [2022-01-31 02:25:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:25:39,664 INFO L225 Difference]: With dead ends: 103 [2022-01-31 02:25:39,664 INFO L226 Difference]: Without dead ends: 78 [2022-01-31 02:25:39,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=231, Invalid=1653, Unknown=8, NotChecked=0, Total=1892 [2022-01-31 02:25:39,666 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 49 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 02:25:39,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 133 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 204 Invalid, 0 Unknown, 111 Unchecked, 0.1s Time] [2022-01-31 02:25:39,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-31 02:25:39,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-01-31 02:25:39,695 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) [2022-01-31 02:25:39,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-01-31 02:25:39,696 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 61 [2022-01-31 02:25:39,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:25:39,696 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-01-31 02:25:39,696 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) [2022-01-31 02:25:39,696 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-01-31 02:25:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 02:25:39,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:25:39,698 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] [2022-01-31 02:25:39,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 02:25:39,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:39,910 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:25:39,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:25:39,911 INFO L85 PathProgramCache]: Analyzing trace with hash 648561106, now seen corresponding path program 3 times [2022-01-31 02:25:39,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:25:39,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398106338] [2022-01-31 02:25:39,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:39,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:25:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:40,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:25:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:40,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 02:25:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:40,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 02:25:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:40,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 02:25:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:40,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 02:25:40,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:40,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 02:25:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:40,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-01-31 02:25:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:40,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 02:25:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:40,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-31 02:25:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-01-31 02:25:40,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:25:40,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398106338] [2022-01-31 02:25:40,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398106338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:25:40,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116703065] [2022-01-31 02:25:40,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 02:25:40,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:40,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:25:40,087 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:25:40,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 02:25:40,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-01-31 02:25:40,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:25:40,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjunts are in the unsatisfiable core [2022-01-31 02:25:40,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:25:40,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 53 [2022-01-31 02:25:40,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 02:25:40,740 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 [2022-01-31 02:25:40,749 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 02:25:40,760 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 [2022-01-31 02:25:40,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 95 [2022-01-31 02:25:40,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 02:25:40,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 02:25:40,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 02:25:40,996 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 [2022-01-31 02:25:41,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 02:25:41,013 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 [2022-01-31 02:25:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-01-31 02:25:41,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:25:43,983 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 [2022-01-31 02:25:43,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 02:25:43,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 02:25:43,998 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 [2022-01-31 02:25:44,022 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 [2022-01-31 02:25:44,042 INFO L353 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-01-31 02:25:44,043 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 [2022-01-31 02:25:44,503 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-01-31 02:25:44,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116703065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:25:44,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:25:44,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 21] total 43 [2022-01-31 02:25:44,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910175626] [2022-01-31 02:25:44,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:25:44,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 02:25:44,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:25:44,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 02:25:44,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 02:25:44,505 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) [2022-01-31 02:25:50,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:25:50,584 INFO L93 Difference]: Finished difference Result 225 states and 259 transitions. [2022-01-31 02:25:50,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 02:25:50,584 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 [2022-01-31 02:25:50,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:25:50,586 INFO L225 Difference]: With dead ends: 225 [2022-01-31 02:25:50,586 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 02:25:50,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1960 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1053, Invalid=6087, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 02:25:50,589 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 377 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1561 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 1561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 343 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 02:25:50,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 123 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 1561 Invalid, 0 Unknown, 343 Unchecked, 2.4s Time] [2022-01-31 02:25:50,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 02:25:50,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 127. [2022-01-31 02:25:50,625 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) [2022-01-31 02:25:50,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 144 transitions. [2022-01-31 02:25:50,627 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 144 transitions. Word has length 77 [2022-01-31 02:25:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:25:50,627 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 144 transitions. [2022-01-31 02:25:50,627 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) [2022-01-31 02:25:50,628 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 144 transitions. [2022-01-31 02:25:50,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 02:25:50,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:25:50,630 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] [2022-01-31 02:25:50,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-31 02:25:50,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:50,838 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:25:50,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:25:50,838 INFO L85 PathProgramCache]: Analyzing trace with hash 616668035, now seen corresponding path program 4 times [2022-01-31 02:25:50,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:25:50,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196640590] [2022-01-31 02:25:50,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:50,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:25:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:50,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:25:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:50,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 02:25:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:50,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 02:25:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:50,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 02:25:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:50,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 02:25:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:50,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 02:25:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:50,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 02:25:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:50,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-01-31 02:25:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:51,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-01-31 02:25:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:51,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-01-31 02:25:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:51,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-01-31 02:25:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-01-31 02:25:51,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:25:51,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196640590] [2022-01-31 02:25:51,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196640590] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:25:51,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286737157] [2022-01-31 02:25:51,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 02:25:51,017 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:51,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:25:51,019 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:25:51,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 02:25:51,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 02:25:51,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:25:51,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 02:25:51,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:25:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-01-31 02:25:51,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:25:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-01-31 02:25:52,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286737157] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:25:52,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:25:52,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-01-31 02:25:52,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594030083] [2022-01-31 02:25:52,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:25:52,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 02:25:52,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:25:52,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 02:25:52,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-01-31 02:25:52,088 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) [2022-01-31 02:25:53,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:25:53,658 INFO L93 Difference]: Finished difference Result 211 states and 242 transitions. [2022-01-31 02:25:53,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 02:25:53,659 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 [2022-01-31 02:25:53,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:25:53,660 INFO L225 Difference]: With dead ends: 211 [2022-01-31 02:25:53,660 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 02:25:53,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-01-31 02:25:53,661 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 223 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 02:25:53,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 74 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 02:25:53,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 02:25:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 116. [2022-01-31 02:25:53,711 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) [2022-01-31 02:25:53,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2022-01-31 02:25:53,712 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 93 [2022-01-31 02:25:53,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:25:53,712 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2022-01-31 02:25:53,713 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) [2022-01-31 02:25:53,713 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2022-01-31 02:25:53,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 02:25:53,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:25:53,715 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] [2022-01-31 02:25:53,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 02:25:53,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:53,950 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:25:53,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:25:53,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1102839803, now seen corresponding path program 5 times [2022-01-31 02:25:53,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:25:53,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510165119] [2022-01-31 02:25:53,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:25:53,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:25:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:25:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 02:25:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 02:25:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 02:25:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 02:25:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 02:25:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 02:25:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 02:25:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 02:25:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 02:25:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-31 02:25:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 02:25:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-01-31 02:25:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-01-31 02:25:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-31 02:25:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-01-31 02:25:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-01-31 02:25:54,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-01-31 02:25:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:25:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-01-31 02:25:54,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:25:54,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510165119] [2022-01-31 02:25:54,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510165119] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:25:54,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123348792] [2022-01-31 02:25:54,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 02:25:54,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:25:54,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:25:54,330 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:25:54,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 02:26:36,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-01-31 02:26:36,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 02:26:36,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-31 02:26:36,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 02:26:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-01-31 02:26:37,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 02:26:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 778 backedges. 6 proven. 378 refuted. 0 times theorem prover too weak. 394 trivial. 0 not checked. [2022-01-31 02:26:37,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123348792] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 02:26:37,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-31 02:26:37,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-01-31 02:26:37,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884062644] [2022-01-31 02:26:37,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-31 02:26:37,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 02:26:37,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 02:26:37,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 02:26:37,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 02:26:37,970 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) [2022-01-31 02:26:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 02:26:56,781 INFO L93 Difference]: Finished difference Result 320 states and 388 transitions. [2022-01-31 02:26:56,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 02:26:56,782 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 [2022-01-31 02:26:56,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 02:26:56,784 INFO L225 Difference]: With dead ends: 320 [2022-01-31 02:26:56,784 INFO L226 Difference]: Without dead ends: 287 [2022-01-31 02:26:56,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=1115, Invalid=2917, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 02:26:56,787 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 555 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2733 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 2733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 02:26:56,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [555 Valid, 138 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 2733 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 02:26:56,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-01-31 02:26:56,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 180. [2022-01-31 02:26:56,835 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) [2022-01-31 02:26:56,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2022-01-31 02:26:56,840 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 149 [2022-01-31 02:26:56,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 02:26:56,841 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2022-01-31 02:26:56,841 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) [2022-01-31 02:26:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2022-01-31 02:26:56,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-01-31 02:26:56,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 02:26:56,845 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] [2022-01-31 02:26:56,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-31 02:26:57,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:26:57,056 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 02:26:57,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 02:26:57,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1415471691, now seen corresponding path program 6 times [2022-01-31 02:26:57,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 02:26:57,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847387824] [2022-01-31 02:26:57,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 02:26:57,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 02:26:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 02:26:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 02:26:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-01-31 02:26:57,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-01-31 02:26:57,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-01-31 02:26:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-01-31 02:26:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-01-31 02:26:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-01-31 02:26:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-01-31 02:26:57,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-01-31 02:26:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-01-31 02:26:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-01-31 02:26:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-01-31 02:26:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-01-31 02:26:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-01-31 02:26:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-01-31 02:26:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-01-31 02:26:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-01-31 02:26:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-01-31 02:26:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-01-31 02:26:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-01-31 02:26:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-01-31 02:26:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-01-31 02:26:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2022-01-31 02:26:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-01-31 02:26:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-01-31 02:26:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-01-31 02:26:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2022-01-31 02:26:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-01-31 02:26:57,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-01-31 02:26:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 239 [2022-01-31 02:26:57,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2022-01-31 02:26:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-01-31 02:26:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2022-01-31 02:26:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 02:26:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3546 backedges. 6 proven. 1770 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-01-31 02:26:57,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 02:26:57,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847387824] [2022-01-31 02:26:57,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847387824] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-31 02:26:57,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692922780] [2022-01-31 02:26:57,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 02:26:57,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 02:26:57,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 02:26:57,858 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 02:26:57,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process