/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 15:42:06,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 15:42:06,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 15:42:06,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 15:42:06,323 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 15:42:06,324 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 15:42:06,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 15:42:06,336 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 15:42:06,342 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 15:42:06,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 15:42:06,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 15:42:06,343 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 15:42:06,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 15:42:06,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 15:42:06,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 15:42:06,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 15:42:06,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 15:42:06,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 15:42:06,344 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 15:42:06,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 15:42:06,344 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 15:42:06,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 15:42:06,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 15:42:06,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 15:42:06,344 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 15:42:06,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 15:42:06,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:42:06,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 15:42:06,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 15:42:06,345 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 15:42:06,345 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 15:42:06,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 15:42:06,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 15:42:06,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 15:42:06,547 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 15:42:06,548 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 15:42:06,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt8.c [2022-03-17 15:42:06,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5760276a/194e08cccc7a42f5b7f24c484f08a226/FLAGf4eaaa48b [2022-03-17 15:42:06,902 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 15:42:06,902 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c [2022-03-17 15:42:06,923 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5760276a/194e08cccc7a42f5b7f24c484f08a226/FLAGf4eaaa48b [2022-03-17 15:42:07,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5760276a/194e08cccc7a42f5b7f24c484f08a226 [2022-03-17 15:42:07,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 15:42:07,349 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 15:42:07,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 15:42:07,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 15:42:07,354 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 15:42:07,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:42:07" (1/1) ... [2022-03-17 15:42:07,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e8086ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:42:07, skipping insertion in model container [2022-03-17 15:42:07,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:42:07" (1/1) ... [2022-03-17 15:42:07,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 15:42:07,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 15:42:07,475 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c[403,416] [2022-03-17 15:42:07,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:42:07,532 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 15:42:07,553 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sumt8.c[403,416] [2022-03-17 15:42:07,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:42:07,572 INFO L208 MainTranslator]: Completed translation [2022-03-17 15:42:07,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:42:07 WrapperNode [2022-03-17 15:42:07,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 15:42:07,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 15:42:07,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 15:42:07,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 15:42:07,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:42:07" (1/1) ... [2022-03-17 15:42:07,580 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:42:07" (1/1) ... [2022-03-17 15:42:07,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:42:07" (1/1) ... [2022-03-17 15:42:07,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:42:07" (1/1) ... [2022-03-17 15:42:07,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:42:07" (1/1) ... [2022-03-17 15:42:07,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:42:07" (1/1) ... [2022-03-17 15:42:07,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:42:07" (1/1) ... [2022-03-17 15:42:07,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 15:42:07,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 15:42:07,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 15:42:07,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 15:42:07,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:42:07" (1/1) ... [2022-03-17 15:42:07,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:42:07,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:42:07,628 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 15:42:07,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 15:42:07,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 15:42:07,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 15:42:07,674 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 15:42:07,674 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 15:42:07,674 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 15:42:07,674 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 15:42:07,674 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 15:42:07,674 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 15:42:07,674 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 15:42:07,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 15:42:07,674 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 15:42:07,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 15:42:07,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 15:42:07,675 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 15:42:07,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 15:42:07,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 15:42:07,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 15:42:07,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 15:42:07,675 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 15:42:07,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 15:42:07,721 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 15:42:07,722 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 15:42:16,560 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 15:42:16,564 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 15:42:16,564 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 15:42:16,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:42:16 BoogieIcfgContainer [2022-03-17 15:42:16,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 15:42:16,566 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 15:42:16,566 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 15:42:16,568 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 15:42:16,570 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:42:16" (1/1) ... [2022-03-17 15:42:16,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:42:16 BasicIcfg [2022-03-17 15:42:16,581 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 15:42:16,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 15:42:16,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 15:42:16,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 15:42:16,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 03:42:07" (1/4) ... [2022-03-17 15:42:16,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c4475c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:42:16, skipping insertion in model container [2022-03-17 15:42:16,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:42:07" (2/4) ... [2022-03-17 15:42:16,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c4475c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:42:16, skipping insertion in model container [2022-03-17 15:42:16,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:42:16" (3/4) ... [2022-03-17 15:42:16,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29c4475c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:42:16, skipping insertion in model container [2022-03-17 15:42:16,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:42:16" (4/4) ... [2022-03-17 15:42:16,602 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt8.cJordan [2022-03-17 15:42:16,611 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 15:42:16,611 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 15:42:16,650 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 15:42:16,655 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 15:42:16,655 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 15:42:16,666 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.6) internal successors, (32), 22 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 15:42:16,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-17 15:42:16,675 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:42:16,675 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:42:16,676 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:42:16,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:42:16,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1416405871, now seen corresponding path program 1 times [2022-03-17 15:42:16,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:42:16,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977143469] [2022-03-17 15:42:16,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:42:16,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:42:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:42:17,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:42:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:42:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:42:17,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:42:17,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977143469] [2022-03-17 15:42:17,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977143469] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:42:17,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:42:17,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-17 15:42:17,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387241528] [2022-03-17 15:42:17,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:42:17,325 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 15:42:17,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:42:17,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 15:42:17,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-17 15:42:17,344 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.6) internal successors, (32), 22 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-03-17 15:42:19,605 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:21,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:23,966 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:26,119 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:28,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:30,445 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:32,608 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:34,820 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:36,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:39,166 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:39,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:42:39,359 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-03-17 15:42:39,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 15:42:39,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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 14 [2022-03-17 15:42:39,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:42:39,366 INFO L225 Difference]: With dead ends: 45 [2022-03-17 15:42:39,366 INFO L226 Difference]: Without dead ends: 34 [2022-03-17 15:42:39,367 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-17 15:42:39,374 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 14 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.8s IncrementalHoareTripleChecker+Time [2022-03-17 15:42:39,375 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 55 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 122 Invalid, 10 Unknown, 0 Unchecked, 21.8s Time] [2022-03-17 15:42:39,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-17 15:42:39,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-03-17 15:42:39,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 24 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 15:42:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-03-17 15:42:39,416 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 14 [2022-03-17 15:42:39,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:42:39,417 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-03-17 15:42:39,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-03-17 15:42:39,417 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-03-17 15:42:39,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 15:42:39,418 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:42:39,418 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:42:39,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 15:42:39,419 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:42:39,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:42:39,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1765150623, now seen corresponding path program 1 times [2022-03-17 15:42:39,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:42:39,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929761275] [2022-03-17 15:42:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:42:39,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:42:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:42:39,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:42:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:42:39,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:42:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:42:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:42:39,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:42:39,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929761275] [2022-03-17 15:42:39,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929761275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:42:39,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191235283] [2022-03-17 15:42:39,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:42:39,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:42:39,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:42:39,552 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:42:39,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 15:42:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:42:39,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-17 15:42:39,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:42:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:42:40,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:42:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:42:40,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191235283] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:42:40,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:42:40,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 9] total 14 [2022-03-17 15:42:40,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135873040] [2022-03-17 15:42:40,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:42:40,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:42:40,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:42:40,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:42:40,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-17 15:42:40,244 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:42:42,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:44,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:46,520 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:48,695 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:50,856 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:53,021 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:55,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:57,373 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:59,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:42:59,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:42:59,713 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-03-17 15:42:59,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:42:59,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-03-17 15:42:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:42:59,715 INFO L225 Difference]: With dead ends: 40 [2022-03-17 15:42:59,716 INFO L226 Difference]: Without dead ends: 40 [2022-03-17 15:42:59,716 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-17 15:42:59,717 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2022-03-17 15:42:59,717 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 86 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 9 Unknown, 0 Unchecked, 19.4s Time] [2022-03-17 15:42:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-17 15:42:59,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-03-17 15:42:59,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 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) [2022-03-17 15:42:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-03-17 15:42:59,720 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 22 [2022-03-17 15:42:59,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:42:59,720 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-03-17 15:42:59,720 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:42:59,721 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-03-17 15:42:59,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 15:42:59,721 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:42:59,721 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:42:59,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 15:42:59,922 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:42:59,922 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:42:59,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:42:59,923 INFO L85 PathProgramCache]: Analyzing trace with hash 2028175541, now seen corresponding path program 1 times [2022-03-17 15:42:59,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:42:59,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261002709] [2022-03-17 15:42:59,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:42:59,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:42:59,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:43:00,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:43:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:43:00,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:43:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:43:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:43:00,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:43:00,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261002709] [2022-03-17 15:43:00,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261002709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:43:00,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606569373] [2022-03-17 15:43:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:43:00,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:43:00,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:43:00,084 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:43:00,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 15:43:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:43:00,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-17 15:43:00,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:43:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:43:00,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:43:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:43:00,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606569373] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:43:00,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:43:00,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 9] total 14 [2022-03-17 15:43:00,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575563480] [2022-03-17 15:43:00,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:43:00,865 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:43:00,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:43:00,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:43:00,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-17 15:43:00,867 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:43:02,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:05,072 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:07,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:09,353 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:11,535 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:13,702 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:15,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:18,044 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:18,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:43:18,045 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-03-17 15:43:18,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:43:18,150 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-03-17 15:43:18,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:43:18,151 INFO L225 Difference]: With dead ends: 42 [2022-03-17 15:43:18,151 INFO L226 Difference]: Without dead ends: 42 [2022-03-17 15:43:18,152 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-17 15:43:18,152 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 5 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:43:18,152 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 86 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 8 Unknown, 0 Unchecked, 17.2s Time] [2022-03-17 15:43:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-17 15:43:18,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2022-03-17 15:43:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 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) [2022-03-17 15:43:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-03-17 15:43:18,155 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 23 [2022-03-17 15:43:18,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:43:18,156 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-03-17 15:43:18,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:43:18,156 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-03-17 15:43:18,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-17 15:43:18,156 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:43:18,156 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:43:18,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-17 15:43:18,360 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 15:43:18,360 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:43:18,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:43:18,361 INFO L85 PathProgramCache]: Analyzing trace with hash -551910210, now seen corresponding path program 1 times [2022-03-17 15:43:18,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:43:18,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619848197] [2022-03-17 15:43:18,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:43:18,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:43:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:43:18,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:43:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:43:18,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:43:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:43:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:43:18,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:43:18,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619848197] [2022-03-17 15:43:18,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619848197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:43:18,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284868281] [2022-03-17 15:43:18,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:43:18,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:43:18,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:43:18,470 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:43:18,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 15:43:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:43:18,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-17 15:43:18,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:43:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:43:18,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:43:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:43:19,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284868281] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:43:19,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:43:19,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 9] total 14 [2022-03-17 15:43:19,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248847730] [2022-03-17 15:43:19,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:43:19,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:43:19,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:43:19,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:43:19,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-17 15:43:19,094 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:43:21,128 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:23,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:25,437 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:27,603 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:30,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.92s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:32,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:34,801 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:36,968 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:39,164 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:43:39,286 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-03-17 15:43:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:43:39,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-03-17 15:43:39,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:43:39,288 INFO L225 Difference]: With dead ends: 53 [2022-03-17 15:43:39,288 INFO L226 Difference]: Without dead ends: 53 [2022-03-17 15:43:39,288 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-17 15:43:39,288 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:43:39,289 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 80 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 20.2s Time] [2022-03-17 15:43:39,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-17 15:43:39,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-17 15:43:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 states have internal predecessors, (56), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 15:43:39,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2022-03-17 15:43:39,293 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 24 [2022-03-17 15:43:39,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:43:39,293 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2022-03-17 15:43:39,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:43:39,293 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2022-03-17 15:43:39,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-17 15:43:39,294 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:43:39,294 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:43:39,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 15:43:39,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:43:39,503 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:43:39,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:43:39,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1155697586, now seen corresponding path program 1 times [2022-03-17 15:43:39,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:43:39,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154440452] [2022-03-17 15:43:39,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:43:39,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:43:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:43:39,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:43:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:43:39,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:43:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:43:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:43:39,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:43:39,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154440452] [2022-03-17 15:43:39,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154440452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:43:39,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755788659] [2022-03-17 15:43:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:43:39,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:43:39,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:43:39,656 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:43:39,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 15:43:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:43:39,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-17 15:43:39,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:43:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:43:40,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:43:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:43:40,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755788659] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:43:40,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:43:40,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 9] total 14 [2022-03-17 15:43:40,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478113380] [2022-03-17 15:43:40,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:43:40,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:43:40,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:43:40,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:43:40,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-17 15:43:40,311 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:43:42,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:44,458 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:46,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:48,759 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:50,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:53,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:55,297 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:43:55,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:43:55,480 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2022-03-17 15:43:55,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:43:55,481 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-03-17 15:43:55,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:43:55,481 INFO L225 Difference]: With dead ends: 65 [2022-03-17 15:43:55,481 INFO L226 Difference]: Without dead ends: 65 [2022-03-17 15:43:55,482 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-17 15:43:55,482 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:43:55,482 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 74 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 7 Unknown, 0 Unchecked, 15.2s Time] [2022-03-17 15:43:55,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-17 15:43:55,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-17 15:43:55,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 states have internal predecessors, (71), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 15:43:55,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2022-03-17 15:43:55,487 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 25 [2022-03-17 15:43:55,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:43:55,487 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2022-03-17 15:43:55,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:43:55,487 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2022-03-17 15:43:55,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 15:43:55,488 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:43:55,488 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:43:55,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 15:43:55,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:43:55,699 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:43:55,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:43:55,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1628518982, now seen corresponding path program 1 times [2022-03-17 15:43:55,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:43:55,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928101971] [2022-03-17 15:43:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:43:55,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:43:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:43:55,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:43:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:43:55,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:43:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:43:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:43:55,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:43:55,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928101971] [2022-03-17 15:43:55,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928101971] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:43:55,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771325494] [2022-03-17 15:43:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:43:55,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:43:55,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:43:55,804 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:43:55,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 15:43:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:43:55,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-17 15:43:55,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:43:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:43:56,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:43:56,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:43:56,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771325494] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:43:56,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:43:56,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 9] total 14 [2022-03-17 15:43:56,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420234240] [2022-03-17 15:43:56,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:43:56,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:43:56,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:43:56,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:43:56,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-17 15:43:56,508 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:43:58,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:00,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:02,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:04,905 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:07,037 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:09,217 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:11,334 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:13,519 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:15,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:17,819 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:19,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:22,080 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:24,207 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:26,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:28,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:30,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:44:30,780 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2022-03-17 15:44:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:44:30,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-03-17 15:44:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:44:30,781 INFO L225 Difference]: With dead ends: 79 [2022-03-17 15:44:30,781 INFO L226 Difference]: Without dead ends: 79 [2022-03-17 15:44:30,781 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-17 15:44:30,781 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:44:30,782 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 67 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 16 Unknown, 0 Unchecked, 34.2s Time] [2022-03-17 15:44:30,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-17 15:44:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-03-17 15:44:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 62 states have internal predecessors, (88), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 15:44:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 103 transitions. [2022-03-17 15:44:30,786 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 103 transitions. Word has length 26 [2022-03-17 15:44:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:44:30,786 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 103 transitions. [2022-03-17 15:44:30,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:44:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 103 transitions. [2022-03-17 15:44:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-17 15:44:30,787 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:44:30,787 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:44:30,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 15:44:31,004 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:44:31,004 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:44:31,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:44:31,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1896740915, now seen corresponding path program 1 times [2022-03-17 15:44:31,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:44:31,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670582017] [2022-03-17 15:44:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:44:31,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:44:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:44:31,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:44:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:44:31,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:44:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:44:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:44:31,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:44:31,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670582017] [2022-03-17 15:44:31,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670582017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:44:31,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440872256] [2022-03-17 15:44:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:44:31,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:44:31,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:44:31,192 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:44:31,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 15:44:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:44:31,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-17 15:44:31,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:44:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:44:31,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:44:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:44:32,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440872256] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:44:32,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:44:32,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 9] total 18 [2022-03-17 15:44:32,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136914533] [2022-03-17 15:44:32,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:44:32,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:44:32,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:44:32,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:44:32,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-03-17 15:44:32,015 INFO L87 Difference]: Start difference. First operand 78 states and 103 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:44:34,059 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:36,183 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:38,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:40,499 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:42,523 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:44,642 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:46,820 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:48,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:51,135 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:53,267 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:55,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:44:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:44:55,600 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2022-03-17 15:44:55,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:44:55,600 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-03-17 15:44:55,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:44:55,601 INFO L225 Difference]: With dead ends: 91 [2022-03-17 15:44:55,601 INFO L226 Difference]: Without dead ends: 91 [2022-03-17 15:44:55,601 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-17 15:44:55,602 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.6s IncrementalHoareTripleChecker+Time [2022-03-17 15:44:55,602 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 64 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 10 Unknown, 0 Unchecked, 23.6s Time] [2022-03-17 15:44:55,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-17 15:44:55,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2022-03-17 15:44:55,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 63 states have internal predecessors, (90), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 15:44:55,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2022-03-17 15:44:55,607 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 27 [2022-03-17 15:44:55,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:44:55,608 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2022-03-17 15:44:55,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:44:55,608 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2022-03-17 15:44:55,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 15:44:55,608 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:44:55,608 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:44:55,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-17 15:44:55,810 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:44:55,810 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:44:55,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:44:55,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1564427944, now seen corresponding path program 1 times [2022-03-17 15:44:55,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:44:55,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714572766] [2022-03-17 15:44:55,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:44:55,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:44:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:44:55,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:44:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:44:55,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:44:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:44:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:44:55,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:44:55,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714572766] [2022-03-17 15:44:55,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714572766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:44:55,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390687682] [2022-03-17 15:44:55,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:44:55,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:44:55,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:44:55,874 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:44:55,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 15:44:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:44:55,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-17 15:44:55,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:44:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:44:56,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:44:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:44:56,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390687682] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:44:56,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:44:56,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 9] total 14 [2022-03-17 15:44:56,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541080422] [2022-03-17 15:44:56,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:44:56,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:44:56,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:44:56,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:44:56,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-17 15:44:56,699 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:44:58,737 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:00,851 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:02,975 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:05,102 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:07,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:09,409 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:11,535 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:13,664 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:15,866 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:18,040 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:20,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:22,365 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:24,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:26,605 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:28,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:28,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:45:28,948 INFO L93 Difference]: Finished difference Result 106 states and 145 transitions. [2022-03-17 15:45:28,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:45:28,948 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-03-17 15:45:28,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:45:28,949 INFO L225 Difference]: With dead ends: 106 [2022-03-17 15:45:28,949 INFO L226 Difference]: Without dead ends: 106 [2022-03-17 15:45:28,949 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-17 15:45:28,950 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:45:28,950 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 56 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 15 Unknown, 0 Unchecked, 32.2s Time] [2022-03-17 15:45:28,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-17 15:45:28,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-03-17 15:45:28,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 86 states have internal predecessors, (126), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 15:45:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 145 transitions. [2022-03-17 15:45:28,956 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 145 transitions. Word has length 28 [2022-03-17 15:45:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:45:28,956 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 145 transitions. [2022-03-17 15:45:28,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:45:28,956 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 145 transitions. [2022-03-17 15:45:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-17 15:45:28,957 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:45:28,957 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:45:28,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-17 15:45:29,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:45:29,168 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:45:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:45:29,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1639369698, now seen corresponding path program 1 times [2022-03-17 15:45:29,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:45:29,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440504490] [2022-03-17 15:45:29,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:45:29,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:45:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:45:29,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:45:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:45:29,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:45:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:45:29,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:45:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:45:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 15:45:29,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:45:29,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440504490] [2022-03-17 15:45:29,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440504490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:45:29,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437698771] [2022-03-17 15:45:29,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:45:29,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:45:29,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:45:29,256 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:45:29,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 15:45:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:45:29,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 15:45:29,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:45:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:45:29,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:45:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-17 15:45:30,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437698771] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:45:30,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:45:30,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 11] total 16 [2022-03-17 15:45:30,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413308253] [2022-03-17 15:45:30,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:45:30,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:45:30,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:45:30,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:45:30,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-17 15:45:30,047 INFO L87 Difference]: Start difference. First operand 106 states and 145 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:45:32,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:34,284 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:36,463 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:39,346 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.88s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:41,493 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:43,492 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:45,616 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:47,818 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:47,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:45:47,965 INFO L93 Difference]: Finished difference Result 116 states and 158 transitions. [2022-03-17 15:45:47,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:45:47,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-03-17 15:45:47,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:45:47,966 INFO L225 Difference]: With dead ends: 116 [2022-03-17 15:45:47,966 INFO L226 Difference]: Without dead ends: 116 [2022-03-17 15:45:47,966 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-17 15:45:47,966 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2022-03-17 15:45:47,967 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 80 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 7 Unknown, 0 Unchecked, 17.9s Time] [2022-03-17 15:45:47,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-17 15:45:47,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2022-03-17 15:45:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 79 states have (on average 1.481012658227848) internal successors, (117), 79 states have internal predecessors, (117), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 15:45:47,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 134 transitions. [2022-03-17 15:45:47,971 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 134 transitions. Word has length 33 [2022-03-17 15:45:47,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:45:47,971 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 134 transitions. [2022-03-17 15:45:47,971 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:45:47,971 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 134 transitions. [2022-03-17 15:45:47,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-17 15:45:47,972 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:45:47,972 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:45:47,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-17 15:45:48,185 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-17 15:45:48,186 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:45:48,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:45:48,186 INFO L85 PathProgramCache]: Analyzing trace with hash 365897998, now seen corresponding path program 1 times [2022-03-17 15:45:48,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:45:48,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773275034] [2022-03-17 15:45:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:45:48,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:45:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:45:48,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:45:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:45:48,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:45:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:45:48,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:45:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:45:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 15:45:48,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:45:48,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773275034] [2022-03-17 15:45:48,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773275034] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:45:48,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028252697] [2022-03-17 15:45:48,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:45:48,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:45:48,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:45:48,442 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:45:48,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-17 15:45:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:45:48,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 15:45:48,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:45:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:45:49,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:45:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-17 15:45:49,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028252697] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:45:49,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:45:49,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 11] total 19 [2022-03-17 15:45:49,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519647541] [2022-03-17 15:45:49,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:45:49,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:45:49,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:45:49,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:45:49,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-17 15:45:49,365 INFO L87 Difference]: Start difference. First operand 97 states and 134 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:45:51,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:53,584 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:55,701 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:45:57,830 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:00,019 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:02,211 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:04,384 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:06,577 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:06,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:46:06,699 INFO L93 Difference]: Finished difference Result 118 states and 162 transitions. [2022-03-17 15:46:06,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:46:06,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-03-17 15:46:06,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:46:06,705 INFO L225 Difference]: With dead ends: 118 [2022-03-17 15:46:06,705 INFO L226 Difference]: Without dead ends: 118 [2022-03-17 15:46:06,705 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-17 15:46:06,705 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2022-03-17 15:46:06,706 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 74 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 8 Unknown, 0 Unchecked, 17.3s Time] [2022-03-17 15:46:06,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-17 15:46:06,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 107. [2022-03-17 15:46:06,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 87 states have (on average 1.471264367816092) internal successors, (128), 87 states have internal predecessors, (128), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 15:46:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 147 transitions. [2022-03-17 15:46:06,710 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 147 transitions. Word has length 34 [2022-03-17 15:46:06,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:46:06,710 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 147 transitions. [2022-03-17 15:46:06,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:46:06,710 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 147 transitions. [2022-03-17 15:46:06,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 15:46:06,711 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:46:06,711 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:46:06,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-17 15:46:06,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-17 15:46:06,911 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:46:06,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:46:06,912 INFO L85 PathProgramCache]: Analyzing trace with hash -342502434, now seen corresponding path program 1 times [2022-03-17 15:46:06,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:46:06,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790349057] [2022-03-17 15:46:06,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:46:06,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:46:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:46:06,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:46:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:46:06,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:46:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:46:06,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:46:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:46:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:46:07,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:46:07,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790349057] [2022-03-17 15:46:07,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790349057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:46:07,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216426912] [2022-03-17 15:46:07,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:46:07,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:46:07,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:46:07,004 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:46:07,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-17 15:46:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:46:07,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 15:46:07,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:46:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:46:07,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:46:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-17 15:46:07,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216426912] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:46:07,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:46:07,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 11] total 17 [2022-03-17 15:46:07,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58910645] [2022-03-17 15:46:07,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:46:07,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:46:07,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:46:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:46:07,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-17 15:46:07,885 INFO L87 Difference]: Start difference. First operand 107 states and 147 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:46:09,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:12,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:14,225 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:16,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:18,584 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:20,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:22,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:24,976 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:27,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:27,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:46:27,309 INFO L93 Difference]: Finished difference Result 121 states and 168 transitions. [2022-03-17 15:46:27,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:46:27,309 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-03-17 15:46:27,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:46:27,310 INFO L225 Difference]: With dead ends: 121 [2022-03-17 15:46:27,310 INFO L226 Difference]: Without dead ends: 121 [2022-03-17 15:46:27,310 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-17 15:46:27,310 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2022-03-17 15:46:27,311 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 62 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 9 Unknown, 0 Unchecked, 19.4s Time] [2022-03-17 15:46:27,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-17 15:46:27,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2022-03-17 15:46:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 98 states have (on average 1.4795918367346939) internal successors, (145), 98 states have internal predecessors, (145), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 15:46:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 166 transitions. [2022-03-17 15:46:27,314 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 166 transitions. Word has length 35 [2022-03-17 15:46:27,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:46:27,315 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 166 transitions. [2022-03-17 15:46:27,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:46:27,315 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 166 transitions. [2022-03-17 15:46:27,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-17 15:46:27,315 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:46:27,315 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:46:27,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-17 15:46:27,519 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-17 15:46:27,519 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:46:27,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:46:27,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2096335515, now seen corresponding path program 1 times [2022-03-17 15:46:27,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:46:27,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801621449] [2022-03-17 15:46:27,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:46:27,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:46:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:46:27,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:46:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:46:27,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:46:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:46:27,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-17 15:46:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:46:27,623 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:46:27,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:46:27,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801621449] [2022-03-17 15:46:27,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801621449] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:46:27,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038274036] [2022-03-17 15:46:27,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:46:27,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:46:27,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:46:27,625 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:46:27,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-17 15:46:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:46:27,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 15:46:27,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:46:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:46:28,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:46:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 15:46:28,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038274036] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:46:28,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:46:28,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 11] total 17 [2022-03-17 15:46:28,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419865038] [2022-03-17 15:46:28,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:46:28,548 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:46:28,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:46:28,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:46:28,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-17 15:46:28,549 INFO L87 Difference]: Start difference. First operand 120 states and 166 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:46:30,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:32,783 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:34,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:37,142 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:39,330 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:41,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:41,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:46:41,631 INFO L93 Difference]: Finished difference Result 131 states and 181 transitions. [2022-03-17 15:46:41,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:46:41,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-03-17 15:46:41,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:46:41,633 INFO L225 Difference]: With dead ends: 131 [2022-03-17 15:46:41,633 INFO L226 Difference]: Without dead ends: 131 [2022-03-17 15:46:41,633 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-17 15:46:41,633 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:46:41,633 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 74 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 6 Unknown, 0 Unchecked, 13.1s Time] [2022-03-17 15:46:41,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-17 15:46:41,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2022-03-17 15:46:41,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 90 states have (on average 1.488888888888889) internal successors, (134), 90 states have internal predecessors, (134), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-17 15:46:41,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 153 transitions. [2022-03-17 15:46:41,639 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 153 transitions. Word has length 35 [2022-03-17 15:46:41,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:46:41,639 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 153 transitions. [2022-03-17 15:46:41,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:46:41,639 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 153 transitions. [2022-03-17 15:46:41,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-17 15:46:41,640 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:46:41,640 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:46:41,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-17 15:46:41,840 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-17 15:46:41,841 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:46:41,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:46:41,841 INFO L85 PathProgramCache]: Analyzing trace with hash -684933591, now seen corresponding path program 1 times [2022-03-17 15:46:41,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:46:41,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007116528] [2022-03-17 15:46:41,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:46:41,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:46:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:46:42,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:46:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:46:42,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:46:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:46:42,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:46:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:46:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 15:46:42,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:46:42,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007116528] [2022-03-17 15:46:42,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007116528] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:46:42,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819390821] [2022-03-17 15:46:42,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:46:42,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:46:42,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:46:42,030 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:46:42,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-17 15:46:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:46:42,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 15:46:42,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:46:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:46:42,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:46:42,931 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-17 15:46:42,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819390821] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:46:42,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:46:42,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 11] total 19 [2022-03-17 15:46:42,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401349670] [2022-03-17 15:46:42,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:46:42,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:46:42,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:46:42,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:46:42,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-17 15:46:42,932 INFO L87 Difference]: Start difference. First operand 110 states and 153 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:46:44,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:47,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:49,293 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:51,422 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:53,539 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:55,722 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:46:57,915 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:00,032 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:02,192 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:04,384 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:47:04,518 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2022-03-17 15:47:04,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:47:04,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-03-17 15:47:04,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:47:04,519 INFO L225 Difference]: With dead ends: 123 [2022-03-17 15:47:04,519 INFO L226 Difference]: Without dead ends: 123 [2022-03-17 15:47:04,519 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-17 15:47:04,520 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2022-03-17 15:47:04,520 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 62 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 10 Unknown, 0 Unchecked, 21.6s Time] [2022-03-17 15:47:04,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-17 15:47:04,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 98. [2022-03-17 15:47:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 80 states have (on average 1.4875) internal successors, (119), 80 states have internal predecessors, (119), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-17 15:47:04,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 136 transitions. [2022-03-17 15:47:04,523 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 136 transitions. Word has length 36 [2022-03-17 15:47:04,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:47:04,523 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 136 transitions. [2022-03-17 15:47:04,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:47:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 136 transitions. [2022-03-17 15:47:04,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-17 15:47:04,524 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:47:04,524 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:47:04,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-17 15:47:04,724 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-17 15:47:04,725 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:47:04,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:47:04,725 INFO L85 PathProgramCache]: Analyzing trace with hash 637669991, now seen corresponding path program 1 times [2022-03-17 15:47:04,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:47:04,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424258233] [2022-03-17 15:47:04,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:47:04,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:47:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:47:04,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:47:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:47:04,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:47:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:47:04,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-17 15:47:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:47:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:47:04,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:47:04,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424258233] [2022-03-17 15:47:04,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424258233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:47:04,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422002240] [2022-03-17 15:47:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:47:04,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:47:04,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:47:04,819 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:47:04,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-17 15:47:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:47:04,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 15:47:04,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:47:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:47:05,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:47:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 15:47:05,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422002240] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:47:05,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:47:05,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 11] total 17 [2022-03-17 15:47:05,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568683064] [2022-03-17 15:47:05,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:47:05,763 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:47:05,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:47:05,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:47:05,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-17 15:47:05,764 INFO L87 Difference]: Start difference. First operand 98 states and 136 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:47:07,803 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:09,884 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:12,012 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:14,210 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:16,399 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:18,579 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:20,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:22,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:24,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:27,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:47:27,290 INFO L93 Difference]: Finished difference Result 122 states and 170 transitions. [2022-03-17 15:47:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:47:27,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-03-17 15:47:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:47:27,291 INFO L225 Difference]: With dead ends: 122 [2022-03-17 15:47:27,291 INFO L226 Difference]: Without dead ends: 122 [2022-03-17 15:47:27,292 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-17 15:47:27,292 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.5s IncrementalHoareTripleChecker+Time [2022-03-17 15:47:27,292 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 63 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 9 Unknown, 0 Unchecked, 21.5s Time] [2022-03-17 15:47:27,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-17 15:47:27,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-03-17 15:47:27,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 99 states have (on average 1.4848484848484849) internal successors, (147), 99 states have internal predecessors, (147), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-17 15:47:27,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 168 transitions. [2022-03-17 15:47:27,295 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 168 transitions. Word has length 36 [2022-03-17 15:47:27,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:47:27,295 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 168 transitions. [2022-03-17 15:47:27,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:47:27,295 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 168 transitions. [2022-03-17 15:47:27,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 15:47:27,296 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:47:27,296 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:47:27,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-17 15:47:27,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-17 15:47:27,508 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:47:27,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:47:27,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1641860732, now seen corresponding path program 1 times [2022-03-17 15:47:27,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:47:27,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247928458] [2022-03-17 15:47:27,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:47:27,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:47:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:47:27,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:47:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:47:27,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:47:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:47:27,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:47:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:47:27,635 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 15:47:27,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:47:27,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247928458] [2022-03-17 15:47:27,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247928458] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:47:27,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966200270] [2022-03-17 15:47:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:47:27,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:47:27,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:47:27,637 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:47:27,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-17 15:47:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:47:27,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 15:47:27,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:47:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:47:28,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:47:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-03-17 15:47:28,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966200270] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:47:28,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:47:28,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 11] total 16 [2022-03-17 15:47:28,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86490635] [2022-03-17 15:47:28,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:47:28,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:47:28,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:47:28,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:47:28,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-17 15:47:28,562 INFO L87 Difference]: Start difference. First operand 121 states and 168 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:47:30,604 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:32,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:34,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:37,054 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:39,238 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:41,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:43,548 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:45,674 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:47,851 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:49,981 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:52,099 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:52,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:47:52,307 INFO L93 Difference]: Finished difference Result 148 states and 208 transitions. [2022-03-17 15:47:52,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:47:52,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-03-17 15:47:52,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:47:52,308 INFO L225 Difference]: With dead ends: 148 [2022-03-17 15:47:52,308 INFO L226 Difference]: Without dead ends: 148 [2022-03-17 15:47:52,309 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-17 15:47:52,309 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time [2022-03-17 15:47:52,309 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 56 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 11 Unknown, 0 Unchecked, 23.7s Time] [2022-03-17 15:47:52,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-17 15:47:52,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 133. [2022-03-17 15:47:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 109 states have (on average 1.4862385321100917) internal successors, (162), 109 states have internal predecessors, (162), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-17 15:47:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 185 transitions. [2022-03-17 15:47:52,312 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 185 transitions. Word has length 37 [2022-03-17 15:47:52,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:47:52,312 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 185 transitions. [2022-03-17 15:47:52,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:47:52,312 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 185 transitions. [2022-03-17 15:47:52,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 15:47:52,313 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:47:52,313 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:47:52,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-17 15:47:52,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:47:52,514 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:47:52,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:47:52,514 INFO L85 PathProgramCache]: Analyzing trace with hash -364359488, now seen corresponding path program 1 times [2022-03-17 15:47:52,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:47:52,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772614690] [2022-03-17 15:47:52,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:47:52,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:47:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:47:52,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:47:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:47:52,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:47:52,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:47:52,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-17 15:47:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:47:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 15:47:52,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:47:52,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772614690] [2022-03-17 15:47:52,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772614690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:47:52,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002550170] [2022-03-17 15:47:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:47:52,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:47:52,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:47:52,718 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:47:52,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-17 15:47:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:47:52,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 15:47:52,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:47:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:47:53,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:47:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 15:47:53,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002550170] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:47:53,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:47:53,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 11] total 20 [2022-03-17 15:47:53,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018882235] [2022-03-17 15:47:53,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:47:53,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:47:53,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:47:53,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:47:53,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-17 15:47:53,643 INFO L87 Difference]: Start difference. First operand 133 states and 185 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:47:55,686 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:57,808 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:47:59,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:02,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:04,343 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:06,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:08,613 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:10,797 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:12,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:13,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:48:13,042 INFO L93 Difference]: Finished difference Result 160 states and 225 transitions. [2022-03-17 15:48:13,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:48:13,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-03-17 15:48:13,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:48:13,044 INFO L225 Difference]: With dead ends: 160 [2022-03-17 15:48:13,044 INFO L226 Difference]: Without dead ends: 160 [2022-03-17 15:48:13,044 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-17 15:48:13,044 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2022-03-17 15:48:13,044 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 62 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 9 Unknown, 0 Unchecked, 19.4s Time] [2022-03-17 15:48:13,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-03-17 15:48:13,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2022-03-17 15:48:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 122 states have (on average 1.5) internal successors, (183), 122 states have internal predecessors, (183), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-17 15:48:13,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 208 transitions. [2022-03-17 15:48:13,048 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 208 transitions. Word has length 37 [2022-03-17 15:48:13,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:48:13,048 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 208 transitions. [2022-03-17 15:48:13,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:48:13,048 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 208 transitions. [2022-03-17 15:48:13,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 15:48:13,048 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:48:13,048 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:48:13,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-17 15:48:13,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-17 15:48:13,256 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:48:13,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:48:13,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1391394537, now seen corresponding path program 1 times [2022-03-17 15:48:13,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:48:13,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123684724] [2022-03-17 15:48:13,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:48:13,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:48:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:48:13,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:48:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:48:13,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:48:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:48:13,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-17 15:48:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:48:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 15:48:13,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:48:13,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123684724] [2022-03-17 15:48:13,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123684724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:48:13,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048653158] [2022-03-17 15:48:13,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:48:13,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:48:13,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:48:13,316 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:48:13,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-17 15:48:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:48:13,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 15:48:13,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:48:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:48:13,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:48:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-17 15:48:14,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048653158] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:48:14,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:48:14,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 11] total 16 [2022-03-17 15:48:14,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85011028] [2022-03-17 15:48:14,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:48:14,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:48:14,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:48:14,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:48:14,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-17 15:48:14,019 INFO L87 Difference]: Start difference. First operand 148 states and 208 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:48:16,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:18,166 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:20,339 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:22,460 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:24,576 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:26,689 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:28,812 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:30,980 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:33,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:35,274 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:37,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:37,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:48:37,590 INFO L93 Difference]: Finished difference Result 172 states and 242 transitions. [2022-03-17 15:48:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:48:37,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-03-17 15:48:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:48:37,591 INFO L225 Difference]: With dead ends: 172 [2022-03-17 15:48:37,591 INFO L226 Difference]: Without dead ends: 172 [2022-03-17 15:48:37,591 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-17 15:48:37,591 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.6s IncrementalHoareTripleChecker+Time [2022-03-17 15:48:37,592 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 62 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 11 Unknown, 0 Unchecked, 23.6s Time] [2022-03-17 15:48:37,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-17 15:48:37,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-03-17 15:48:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 141 states have (on average 1.49645390070922) internal successors, (211), 141 states have internal predecessors, (211), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-17 15:48:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 240 transitions. [2022-03-17 15:48:37,595 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 240 transitions. Word has length 37 [2022-03-17 15:48:37,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:48:37,595 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 240 transitions. [2022-03-17 15:48:37,595 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:48:37,595 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 240 transitions. [2022-03-17 15:48:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 15:48:37,595 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:48:37,595 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:48:37,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-17 15:48:37,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-17 15:48:37,796 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:48:37,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:48:37,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1305243963, now seen corresponding path program 1 times [2022-03-17 15:48:37,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:48:37,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011616809] [2022-03-17 15:48:37,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:48:37,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:48:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:48:38,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:48:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:48:38,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:48:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:48:38,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-17 15:48:38,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:48:38,117 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 15:48:38,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:48:38,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011616809] [2022-03-17 15:48:38,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011616809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:48:38,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342918347] [2022-03-17 15:48:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:48:38,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:48:38,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:48:38,136 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:48:38,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-17 15:48:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:48:38,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 15:48:38,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:48:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:48:38,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:48:39,203 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-17 15:48:39,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342918347] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:48:39,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:48:39,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 11] total 20 [2022-03-17 15:48:39,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172608121] [2022-03-17 15:48:39,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:48:39,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:48:39,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:48:39,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:48:39,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-03-17 15:48:39,204 INFO L87 Difference]: Start difference. First operand 171 states and 240 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:48:41,241 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:43,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:45,497 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:47,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:49,857 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:52,032 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:54,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:56,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:48:58,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:00,684 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:00,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:49:00,815 INFO L93 Difference]: Finished difference Result 212 states and 301 transitions. [2022-03-17 15:49:00,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:49:00,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2022-03-17 15:49:00,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:49:00,817 INFO L225 Difference]: With dead ends: 212 [2022-03-17 15:49:00,817 INFO L226 Difference]: Without dead ends: 212 [2022-03-17 15:49:00,817 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-17 15:49:00,817 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.6s IncrementalHoareTripleChecker+Time [2022-03-17 15:49:00,817 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 58 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 10 Unknown, 0 Unchecked, 21.6s Time] [2022-03-17 15:49:00,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-03-17 15:49:00,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-03-17 15:49:00,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 176 states have (on average 1.5113636363636365) internal successors, (266), 176 states have internal predecessors, (266), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 15:49:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 301 transitions. [2022-03-17 15:49:00,821 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 301 transitions. Word has length 38 [2022-03-17 15:49:00,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:49:00,821 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 301 transitions. [2022-03-17 15:49:00,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:49:00,821 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 301 transitions. [2022-03-17 15:49:00,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-17 15:49:00,822 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:49:00,822 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:49:00,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-17 15:49:01,028 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-17 15:49:01,029 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:49:01,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:49:01,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1310866698, now seen corresponding path program 1 times [2022-03-17 15:49:01,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:49:01,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47583356] [2022-03-17 15:49:01,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:49:01,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:49:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:01,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:49:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:01,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:49:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:01,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-17 15:49:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:49:01,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:49:01,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47583356] [2022-03-17 15:49:01,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47583356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:49:01,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550182626] [2022-03-17 15:49:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:49:01,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:49:01,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:49:01,126 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:49:01,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-17 15:49:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:01,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 15:49:01,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:49:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:49:01,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:49:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-17 15:49:02,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550182626] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:49:02,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:49:02,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 11] total 17 [2022-03-17 15:49:02,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759341062] [2022-03-17 15:49:02,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:49:02,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:49:02,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:49:02,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:49:02,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-17 15:49:02,109 INFO L87 Difference]: Start difference. First operand 212 states and 301 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:49:04,146 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:06,281 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:08,464 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:10,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:12,763 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:15,035 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:15,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:49:15,232 INFO L93 Difference]: Finished difference Result 225 states and 320 transitions. [2022-03-17 15:49:15,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:49:15,232 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2022-03-17 15:49:15,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:49:15,233 INFO L225 Difference]: With dead ends: 225 [2022-03-17 15:49:15,233 INFO L226 Difference]: Without dead ends: 225 [2022-03-17 15:49:15,233 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-17 15:49:15,233 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:49:15,234 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 62 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 6 Unknown, 0 Unchecked, 13.1s Time] [2022-03-17 15:49:15,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-17 15:49:15,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 213. [2022-03-17 15:49:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 177 states have (on average 1.5141242937853108) internal successors, (268), 177 states have internal predecessors, (268), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 15:49:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 303 transitions. [2022-03-17 15:49:15,238 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 303 transitions. Word has length 38 [2022-03-17 15:49:15,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:49:15,238 INFO L478 AbstractCegarLoop]: Abstraction has 213 states and 303 transitions. [2022-03-17 15:49:15,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:49:15,238 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 303 transitions. [2022-03-17 15:49:15,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-17 15:49:15,238 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:49:15,238 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:49:15,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-17 15:49:15,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:49:15,447 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:49:15,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:49:15,448 INFO L85 PathProgramCache]: Analyzing trace with hash -769966965, now seen corresponding path program 1 times [2022-03-17 15:49:15,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:49:15,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566273057] [2022-03-17 15:49:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:49:15,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:49:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:15,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:49:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:15,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:49:15,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:15,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-17 15:49:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 15:49:15,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:49:15,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566273057] [2022-03-17 15:49:15,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566273057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:49:15,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777992484] [2022-03-17 15:49:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:49:15,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:49:15,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:49:15,540 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:49:15,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-17 15:49:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:15,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 15:49:15,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:49:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:49:16,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:49:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-17 15:49:16,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777992484] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:49:16,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:49:16,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 11] total 16 [2022-03-17 15:49:16,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813995672] [2022-03-17 15:49:16,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:49:16,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:49:16,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:49:16,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:49:16,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-17 15:49:16,446 INFO L87 Difference]: Start difference. First operand 213 states and 303 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:49:18,481 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:20,612 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:22,737 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:24,911 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:27,035 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:29,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:31,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:33,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:33,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:49:33,763 INFO L93 Difference]: Finished difference Result 240 states and 343 transitions. [2022-03-17 15:49:33,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:49:33,763 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-03-17 15:49:33,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:49:33,764 INFO L225 Difference]: With dead ends: 240 [2022-03-17 15:49:33,764 INFO L226 Difference]: Without dead ends: 240 [2022-03-17 15:49:33,764 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-17 15:49:33,765 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2022-03-17 15:49:33,765 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 56 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 8 Unknown, 0 Unchecked, 17.3s Time] [2022-03-17 15:49:33,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-03-17 15:49:33,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-03-17 15:49:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 200 states have (on average 1.52) internal successors, (304), 200 states have internal predecessors, (304), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-17 15:49:33,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 343 transitions. [2022-03-17 15:49:33,769 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 343 transitions. Word has length 39 [2022-03-17 15:49:33,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:49:33,769 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 343 transitions. [2022-03-17 15:49:33,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:49:33,769 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 343 transitions. [2022-03-17 15:49:33,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-17 15:49:33,770 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:49:33,770 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:49:33,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-17 15:49:33,986 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:49:33,986 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:49:33,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:49:33,987 INFO L85 PathProgramCache]: Analyzing trace with hash -385545324, now seen corresponding path program 1 times [2022-03-17 15:49:33,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:49:33,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384723779] [2022-03-17 15:49:33,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:49:33,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:49:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:34,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:49:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:34,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:49:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:34,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-17 15:49:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 15:49:34,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:49:34,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384723779] [2022-03-17 15:49:34,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384723779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:49:34,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947467362] [2022-03-17 15:49:34,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:49:34,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:49:34,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:49:34,076 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:49:34,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-17 15:49:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:34,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-17 15:49:34,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:49:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 15:49:34,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:49:35,127 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-17 15:49:35,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947467362] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:49:35,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:49:35,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 11] total 17 [2022-03-17 15:49:35,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15408590] [2022-03-17 15:49:35,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:49:35,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:49:35,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:49:35,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:49:35,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-17 15:49:35,128 INFO L87 Difference]: Start difference. First operand 240 states and 343 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:49:37,167 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:39,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:41,398 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:43,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:45,689 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:47,858 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:50,029 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:52,168 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:54,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:54,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:49:54,490 INFO L93 Difference]: Finished difference Result 254 states and 364 transitions. [2022-03-17 15:49:54,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:49:54,490 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-03-17 15:49:54,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:49:54,491 INFO L225 Difference]: With dead ends: 254 [2022-03-17 15:49:54,491 INFO L226 Difference]: Without dead ends: 254 [2022-03-17 15:49:54,491 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-17 15:49:54,492 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2022-03-17 15:49:54,492 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 56 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 9 Unknown, 0 Unchecked, 19.3s Time] [2022-03-17 15:49:54,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-17 15:49:54,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-03-17 15:49:54,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 212 states have (on average 1.5235849056603774) internal successors, (323), 212 states have internal predecessors, (323), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-17 15:49:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 364 transitions. [2022-03-17 15:49:54,496 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 364 transitions. Word has length 41 [2022-03-17 15:49:54,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:49:54,496 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 364 transitions. [2022-03-17 15:49:54,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:49:54,496 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 364 transitions. [2022-03-17 15:49:54,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-17 15:49:54,497 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:49:54,497 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:49:54,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-17 15:49:54,697 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-17 15:49:54,698 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:49:54,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:49:54,698 INFO L85 PathProgramCache]: Analyzing trace with hash 2144912267, now seen corresponding path program 1 times [2022-03-17 15:49:54,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:49:54,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143525925] [2022-03-17 15:49:54,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:49:54,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:49:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:54,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:49:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:54,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:49:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:54,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:49:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:54,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-17 15:49:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:49:54,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:49:54,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143525925] [2022-03-17 15:49:54,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143525925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:49:54,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915379632] [2022-03-17 15:49:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:49:54,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:49:54,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:49:54,775 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:49:54,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-17 15:49:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:49:54,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-17 15:49:54,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:49:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:49:55,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:49:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 15:49:55,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915379632] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:49:55,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:49:55,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 13] total 20 [2022-03-17 15:49:55,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300321620] [2022-03-17 15:49:55,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:49:55,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:49:55,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:49:55,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:49:55,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-17 15:49:55,783 INFO L87 Difference]: Start difference. First operand 254 states and 364 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:49:57,822 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:49:59,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:02,123 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:04,293 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:06,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:08,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:10,710 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:50:10,901 INFO L93 Difference]: Finished difference Result 278 states and 398 transitions. [2022-03-17 15:50:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:50:10,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-03-17 15:50:10,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:50:10,903 INFO L225 Difference]: With dead ends: 278 [2022-03-17 15:50:10,903 INFO L226 Difference]: Without dead ends: 278 [2022-03-17 15:50:10,903 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-03-17 15:50:10,903 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:50:10,904 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 62 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 7 Unknown, 0 Unchecked, 15.1s Time] [2022-03-17 15:50:10,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-03-17 15:50:10,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2022-03-17 15:50:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 231 states have (on average 1.5194805194805194) internal successors, (351), 231 states have internal predecessors, (351), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-17 15:50:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 396 transitions. [2022-03-17 15:50:10,909 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 396 transitions. Word has length 45 [2022-03-17 15:50:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:50:10,909 INFO L478 AbstractCegarLoop]: Abstraction has 277 states and 396 transitions. [2022-03-17 15:50:10,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:50:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 396 transitions. [2022-03-17 15:50:10,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-17 15:50:10,910 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:50:10,910 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:50:10,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-17 15:50:11,126 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-17 15:50:11,127 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:50:11,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:50:11,127 INFO L85 PathProgramCache]: Analyzing trace with hash -884489188, now seen corresponding path program 1 times [2022-03-17 15:50:11,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:50:11,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709055881] [2022-03-17 15:50:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:11,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:50:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:11,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:50:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:11,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:50:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:11,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:50:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:11,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-17 15:50:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-03-17 15:50:11,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:50:11,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709055881] [2022-03-17 15:50:11,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709055881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:50:11,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714966076] [2022-03-17 15:50:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:11,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:50:11,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:50:11,339 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:50:11,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-17 15:50:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:11,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-17 15:50:11,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:50:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:50:12,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:50:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 15:50:12,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714966076] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:50:12,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:50:12,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 13] total 21 [2022-03-17 15:50:12,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190541658] [2022-03-17 15:50:12,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:50:12,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:50:12,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:50:12,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:50:12,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-17 15:50:12,476 INFO L87 Difference]: Start difference. First operand 277 states and 396 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:50:14,511 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:16,694 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:18,872 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:21,054 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:23,190 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:25,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:25,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:50:25,539 INFO L93 Difference]: Finished difference Result 290 states and 415 transitions. [2022-03-17 15:50:25,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:50:25,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-03-17 15:50:25,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:50:25,540 INFO L225 Difference]: With dead ends: 290 [2022-03-17 15:50:25,540 INFO L226 Difference]: Without dead ends: 290 [2022-03-17 15:50:25,541 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-17 15:50:25,541 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:50:25,541 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 62 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 6 Unknown, 0 Unchecked, 13.0s Time] [2022-03-17 15:50:25,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-17 15:50:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 252. [2022-03-17 15:50:25,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 210 states have (on average 1.519047619047619) internal successors, (319), 210 states have internal predecessors, (319), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-17 15:50:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 360 transitions. [2022-03-17 15:50:25,547 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 360 transitions. Word has length 46 [2022-03-17 15:50:25,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:50:25,547 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 360 transitions. [2022-03-17 15:50:25,548 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:50:25,548 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 360 transitions. [2022-03-17 15:50:25,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-17 15:50:25,548 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:50:25,548 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:50:25,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-17 15:50:25,748 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:50:25,749 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:50:25,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:50:25,749 INFO L85 PathProgramCache]: Analyzing trace with hash 871264837, now seen corresponding path program 1 times [2022-03-17 15:50:25,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:50:25,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487254629] [2022-03-17 15:50:25,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:25,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:50:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:25,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:50:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:25,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:50:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:25,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:50:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:25,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-03-17 15:50:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-17 15:50:25,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:50:25,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487254629] [2022-03-17 15:50:25,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487254629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:50:25,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880056058] [2022-03-17 15:50:25,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:25,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:50:25,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:50:25,829 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:50:25,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-17 15:50:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:25,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-17 15:50:25,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:50:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:50:26,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:50:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-17 15:50:27,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880056058] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:50:27,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:50:27,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 13] total 19 [2022-03-17 15:50:27,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553765497] [2022-03-17 15:50:27,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:50:27,102 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:50:27,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:50:27,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:50:27,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-03-17 15:50:27,102 INFO L87 Difference]: Start difference. First operand 252 states and 360 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:50:29,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:31,334 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:33,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:35,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:37,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:39,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:42,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:42,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:50:42,300 INFO L93 Difference]: Finished difference Result 276 states and 394 transitions. [2022-03-17 15:50:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:50:42,300 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-03-17 15:50:42,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:50:42,301 INFO L225 Difference]: With dead ends: 276 [2022-03-17 15:50:42,301 INFO L226 Difference]: Without dead ends: 276 [2022-03-17 15:50:42,301 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-17 15:50:42,301 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:50:42,302 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 62 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 7 Unknown, 0 Unchecked, 15.2s Time] [2022-03-17 15:50:42,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-03-17 15:50:42,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2022-03-17 15:50:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 229 states have (on average 1.51528384279476) internal successors, (347), 229 states have internal predecessors, (347), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-17 15:50:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 392 transitions. [2022-03-17 15:50:42,306 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 392 transitions. Word has length 46 [2022-03-17 15:50:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:50:42,306 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 392 transitions. [2022-03-17 15:50:42,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:50:42,306 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 392 transitions. [2022-03-17 15:50:42,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 15:50:42,306 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:50:42,307 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:50:42,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-17 15:50:42,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:50:42,507 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:50:42,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:50:42,508 INFO L85 PathProgramCache]: Analyzing trace with hash -249395479, now seen corresponding path program 1 times [2022-03-17 15:50:42,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:50:42,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108623814] [2022-03-17 15:50:42,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:42,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:50:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:42,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:50:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:42,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:50:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:42,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:50:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:42,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-17 15:50:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:50:42,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:50:42,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108623814] [2022-03-17 15:50:42,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108623814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:50:42,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709430889] [2022-03-17 15:50:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:50:42,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:50:42,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:50:42,618 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:50:42,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-17 15:50:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:50:42,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-17 15:50:42,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:50:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:50:43,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:50:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 15:50:43,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709430889] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:50:43,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:50:43,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 13] total 20 [2022-03-17 15:50:43,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590619582] [2022-03-17 15:50:43,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:50:43,707 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:50:43,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:50:43,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:50:43,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-17 15:50:43,708 INFO L87 Difference]: Start difference. First operand 275 states and 392 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:50:45,752 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:47,929 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:50,101 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:52,272 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:54,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:56,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:50:58,748 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:00,974 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:01,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:01,098 INFO L93 Difference]: Finished difference Result 302 states and 432 transitions. [2022-03-17 15:51:01,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:51:01,098 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-03-17 15:51:01,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:01,099 INFO L225 Difference]: With dead ends: 302 [2022-03-17 15:51:01,099 INFO L226 Difference]: Without dead ends: 302 [2022-03-17 15:51:01,099 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-03-17 15:51:01,099 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:01,100 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 57 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 8 Unknown, 0 Unchecked, 17.4s Time] [2022-03-17 15:51:01,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-17 15:51:01,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 249. [2022-03-17 15:51:01,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 207 states have (on average 1.5120772946859904) internal successors, (313), 207 states have internal predecessors, (313), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-17 15:51:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 354 transitions. [2022-03-17 15:51:01,103 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 354 transitions. Word has length 47 [2022-03-17 15:51:01,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:01,104 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 354 transitions. [2022-03-17 15:51:01,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:51:01,104 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 354 transitions. [2022-03-17 15:51:01,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 15:51:01,104 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:01,104 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:01,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-17 15:51:01,320 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-17 15:51:01,321 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:01,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:01,321 INFO L85 PathProgramCache]: Analyzing trace with hash -255018214, now seen corresponding path program 1 times [2022-03-17 15:51:01,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:01,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836333463] [2022-03-17 15:51:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:01,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:01,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:51:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:01,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:51:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:01,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:51:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:01,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-17 15:51:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-17 15:51:01,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:01,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836333463] [2022-03-17 15:51:01,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836333463] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:01,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810506402] [2022-03-17 15:51:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:01,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:01,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:01,604 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:51:01,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-17 15:51:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:01,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-17 15:51:01,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:51:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:51:02,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:51:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-17 15:51:02,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810506402] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:02,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:51:02,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 13] total 21 [2022-03-17 15:51:02,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855074458] [2022-03-17 15:51:02,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:51:02,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:51:02,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:02,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:51:02,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-17 15:51:02,897 INFO L87 Difference]: Start difference. First operand 249 states and 354 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:51:04,945 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:07,111 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:09,243 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:11,425 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:13,675 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:15,866 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:15,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:15,996 INFO L93 Difference]: Finished difference Result 276 states and 394 transitions. [2022-03-17 15:51:15,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:51:15,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-03-17 15:51:15,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:15,997 INFO L225 Difference]: With dead ends: 276 [2022-03-17 15:51:15,997 INFO L226 Difference]: Without dead ends: 276 [2022-03-17 15:51:15,997 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-17 15:51:15,997 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:15,997 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 62 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 6 Unknown, 0 Unchecked, 13.1s Time] [2022-03-17 15:51:15,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-03-17 15:51:16,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 251. [2022-03-17 15:51:16,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 209 states have (on average 1.5167464114832536) internal successors, (317), 209 states have internal predecessors, (317), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-17 15:51:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 358 transitions. [2022-03-17 15:51:16,002 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 358 transitions. Word has length 47 [2022-03-17 15:51:16,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:16,002 INFO L478 AbstractCegarLoop]: Abstraction has 251 states and 358 transitions. [2022-03-17 15:51:16,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:51:16,002 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 358 transitions. [2022-03-17 15:51:16,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-17 15:51:16,002 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:16,002 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:16,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-17 15:51:16,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-17 15:51:16,211 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:16,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1574898660, now seen corresponding path program 1 times [2022-03-17 15:51:16,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:16,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908622016] [2022-03-17 15:51:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:16,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:16,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:51:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:16,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:51:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:16,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-17 15:51:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:16,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-17 15:51:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-03-17 15:51:16,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:16,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908622016] [2022-03-17 15:51:16,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908622016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:16,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899786578] [2022-03-17 15:51:16,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:16,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:16,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:16,274 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:51:16,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-17 15:51:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:16,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-17 15:51:16,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:51:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:51:17,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:51:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-17 15:51:17,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899786578] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:17,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:51:17,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 13] total 19 [2022-03-17 15:51:17,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656042522] [2022-03-17 15:51:17,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:51:17,328 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:51:17,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:17,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:51:17,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-03-17 15:51:17,329 INFO L87 Difference]: Start difference. First operand 251 states and 358 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:51:19,358 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:21,467 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:23,643 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:25,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:27,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:30,129 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:32,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:34,363 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:36,474 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:38,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:38,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:51:38,783 INFO L93 Difference]: Finished difference Result 299 states and 426 transitions. [2022-03-17 15:51:38,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:51:38,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-03-17 15:51:38,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:51:38,784 INFO L225 Difference]: With dead ends: 299 [2022-03-17 15:51:38,785 INFO L226 Difference]: Without dead ends: 299 [2022-03-17 15:51:38,785 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-17 15:51:38,785 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2022-03-17 15:51:38,785 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 62 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 10 Unknown, 0 Unchecked, 21.4s Time] [2022-03-17 15:51:38,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-17 15:51:38,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 297. [2022-03-17 15:51:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 247 states have (on average 1.5101214574898785) internal successors, (373), 247 states have internal predecessors, (373), 25 states have call successors, (25), 25 states have call predecessors, (25), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-17 15:51:38,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 422 transitions. [2022-03-17 15:51:38,790 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 422 transitions. Word has length 47 [2022-03-17 15:51:38,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:51:38,790 INFO L478 AbstractCegarLoop]: Abstraction has 297 states and 422 transitions. [2022-03-17 15:51:38,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:51:38,790 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 422 transitions. [2022-03-17 15:51:38,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-17 15:51:38,791 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:51:38,791 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:51:38,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-17 15:51:39,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-17 15:51:39,007 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:51:39,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:51:39,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1896564967, now seen corresponding path program 1 times [2022-03-17 15:51:39,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:51:39,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108006472] [2022-03-17 15:51:39,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:39,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:51:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:39,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:51:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:39,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:51:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:39,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:51:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:39,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-17 15:51:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:39,176 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-17 15:51:39,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:51:39,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108006472] [2022-03-17 15:51:39,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108006472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:39,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654805714] [2022-03-17 15:51:39,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:51:39,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:51:39,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:51:39,177 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:51:39,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-17 15:51:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:51:39,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-17 15:51:39,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:51:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:51:40,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:51:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-17 15:51:40,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654805714] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:51:40,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:51:40,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 13] total 21 [2022-03-17 15:51:40,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659059830] [2022-03-17 15:51:40,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:51:40,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:51:40,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:51:40,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:51:40,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-17 15:51:40,355 INFO L87 Difference]: Start difference. First operand 297 states and 422 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:51:42,388 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:44,562 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:46,679 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:48,805 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:50,917 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:53,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:55,222 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:57,432 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:51:59,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:01,676 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:03,801 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:05,926 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:08,178 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:10,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:10,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:52:10,435 INFO L93 Difference]: Finished difference Result 338 states and 483 transitions. [2022-03-17 15:52:10,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:52:10,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-03-17 15:52:10,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:52:10,436 INFO L225 Difference]: With dead ends: 338 [2022-03-17 15:52:10,436 INFO L226 Difference]: Without dead ends: 338 [2022-03-17 15:52:10,436 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 85 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-17 15:52:10,437 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:52:10,437 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 60 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 14 Unknown, 0 Unchecked, 30.1s Time] [2022-03-17 15:52:10,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-03-17 15:52:10,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 323. [2022-03-17 15:52:10,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 269 states have (on average 1.513011152416357) internal successors, (407), 269 states have internal predecessors, (407), 27 states have call successors, (27), 27 states have call predecessors, (27), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-17 15:52:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 460 transitions. [2022-03-17 15:52:10,441 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 460 transitions. Word has length 48 [2022-03-17 15:52:10,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:52:10,442 INFO L478 AbstractCegarLoop]: Abstraction has 323 states and 460 transitions. [2022-03-17 15:52:10,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:52:10,442 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 460 transitions. [2022-03-17 15:52:10,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-17 15:52:10,442 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:52:10,442 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:52:10,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-17 15:52:10,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-17 15:52:10,643 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:52:10,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:52:10,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1223324707, now seen corresponding path program 1 times [2022-03-17 15:52:10,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:52:10,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113178075] [2022-03-17 15:52:10,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:52:10,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:52:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:10,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:52:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:10,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:52:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:10,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-17 15:52:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:10,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-17 15:52:10,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-03-17 15:52:10,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:52:10,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113178075] [2022-03-17 15:52:10,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113178075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:52:10,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752150625] [2022-03-17 15:52:10,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:52:10,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:52:10,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:52:10,691 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:52:10,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-17 15:52:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:10,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-17 15:52:10,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:52:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:52:11,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:52:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-17 15:52:11,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752150625] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:52:11,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:52:11,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 13] total 18 [2022-03-17 15:52:11,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628133119] [2022-03-17 15:52:11,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:52:11,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:52:11,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:52:11,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:52:11,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-03-17 15:52:11,734 INFO L87 Difference]: Start difference. First operand 323 states and 460 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:52:13,770 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:15,889 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:18,019 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:20,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:22,365 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:24,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:26,743 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:52:26,872 INFO L93 Difference]: Finished difference Result 364 states and 521 transitions. [2022-03-17 15:52:26,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:52:26,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-03-17 15:52:26,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:52:26,873 INFO L225 Difference]: With dead ends: 364 [2022-03-17 15:52:26,873 INFO L226 Difference]: Without dead ends: 364 [2022-03-17 15:52:26,873 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-17 15:52:26,874 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:52:26,874 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 63 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 7 Unknown, 0 Unchecked, 15.1s Time] [2022-03-17 15:52:26,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-03-17 15:52:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 352. [2022-03-17 15:52:26,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 294 states have (on average 1.5204081632653061) internal successors, (447), 294 states have internal predecessors, (447), 29 states have call successors, (29), 29 states have call predecessors, (29), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-17 15:52:26,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 504 transitions. [2022-03-17 15:52:26,879 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 504 transitions. Word has length 48 [2022-03-17 15:52:26,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:52:26,879 INFO L478 AbstractCegarLoop]: Abstraction has 352 states and 504 transitions. [2022-03-17 15:52:26,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:52:26,879 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 504 transitions. [2022-03-17 15:52:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-17 15:52:26,879 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:52:26,880 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:52:26,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-17 15:52:27,096 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-17 15:52:27,096 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:52:27,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:52:27,097 INFO L85 PathProgramCache]: Analyzing trace with hash 480555262, now seen corresponding path program 1 times [2022-03-17 15:52:27,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:52:27,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553596250] [2022-03-17 15:52:27,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:52:27,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:52:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:27,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:52:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:27,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:52:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:27,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-17 15:52:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:27,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-03-17 15:52:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:52:27,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:52:27,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553596250] [2022-03-17 15:52:27,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553596250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:52:27,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290590753] [2022-03-17 15:52:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:52:27,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:52:27,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:52:27,210 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:52:27,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-17 15:52:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:27,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-17 15:52:27,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:52:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:52:28,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:52:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-17 15:52:28,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290590753] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:52:28,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:52:28,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 13] total 20 [2022-03-17 15:52:28,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290445803] [2022-03-17 15:52:28,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:52:28,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:52:28,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:52:28,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:52:28,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-03-17 15:52:28,388 INFO L87 Difference]: Start difference. First operand 352 states and 504 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:52:30,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:32,539 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:34,716 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:36,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:39,020 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:41,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:43,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:45,472 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:47,601 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:52:47,822 INFO L93 Difference]: Finished difference Result 407 states and 586 transitions. [2022-03-17 15:52:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:52:47,822 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-03-17 15:52:47,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:52:47,823 INFO L225 Difference]: With dead ends: 407 [2022-03-17 15:52:47,824 INFO L226 Difference]: Without dead ends: 407 [2022-03-17 15:52:47,824 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-17 15:52:47,824 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2022-03-17 15:52:47,824 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 57 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 9 Unknown, 0 Unchecked, 19.4s Time] [2022-03-17 15:52:47,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-03-17 15:52:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2022-03-17 15:52:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 341 states have (on average 1.5278592375366569) internal successors, (521), 341 states have internal predecessors, (521), 33 states have call successors, (33), 33 states have call predecessors, (33), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-17 15:52:47,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 586 transitions. [2022-03-17 15:52:47,830 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 586 transitions. Word has length 49 [2022-03-17 15:52:47,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:52:47,830 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 586 transitions. [2022-03-17 15:52:47,830 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:52:47,830 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 586 transitions. [2022-03-17 15:52:47,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-17 15:52:47,831 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:52:47,831 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:52:47,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-17 15:52:48,046 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:52:48,047 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:52:48,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:52:48,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1943834384, now seen corresponding path program 1 times [2022-03-17 15:52:48,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:52:48,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416738679] [2022-03-17 15:52:48,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:52:48,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:52:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:48,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:52:48,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:48,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:52:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:48,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:52:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:48,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-17 15:52:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:52:48,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:52:48,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416738679] [2022-03-17 15:52:48,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416738679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:52:48,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530864982] [2022-03-17 15:52:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:52:48,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:52:48,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:52:48,136 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:52:48,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-17 15:52:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:52:48,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-17 15:52:48,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:52:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:52:49,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:52:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-03-17 15:52:49,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530864982] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:52:49,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:52:49,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 13] total 20 [2022-03-17 15:52:49,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516194865] [2022-03-17 15:52:49,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:52:49,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:52:49,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:52:49,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:52:49,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-17 15:52:49,348 INFO L87 Difference]: Start difference. First operand 407 states and 586 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:52:51,383 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:53,560 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:55,694 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:57,814 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:52:59,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:02,080 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:04,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:06,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:08,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:10,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:11,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:53:11,065 INFO L93 Difference]: Finished difference Result 421 states and 607 transitions. [2022-03-17 15:53:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:53:11,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-03-17 15:53:11,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:53:11,067 INFO L225 Difference]: With dead ends: 421 [2022-03-17 15:53:11,067 INFO L226 Difference]: Without dead ends: 421 [2022-03-17 15:53:11,067 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 91 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-03-17 15:53:11,068 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.7s IncrementalHoareTripleChecker+Time [2022-03-17 15:53:11,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 58 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 10 Unknown, 0 Unchecked, 21.7s Time] [2022-03-17 15:53:11,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-03-17 15:53:11,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 407. [2022-03-17 15:53:11,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 341 states have (on average 1.5278592375366569) internal successors, (521), 341 states have internal predecessors, (521), 33 states have call successors, (33), 33 states have call predecessors, (33), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-17 15:53:11,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 586 transitions. [2022-03-17 15:53:11,076 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 586 transitions. Word has length 50 [2022-03-17 15:53:11,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:53:11,076 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 586 transitions. [2022-03-17 15:53:11,076 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:53:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 586 transitions. [2022-03-17 15:53:11,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-17 15:53:11,078 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:53:11,078 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:53:11,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-17 15:53:11,278 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-17 15:53:11,279 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:53:11,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:53:11,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1224528057, now seen corresponding path program 1 times [2022-03-17 15:53:11,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:53:11,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709932670] [2022-03-17 15:53:11,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:53:11,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:53:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:11,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:53:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:11,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:53:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:11,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-03-17 15:53:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:11,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-17 15:53:11,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:53:11,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:53:11,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709932670] [2022-03-17 15:53:11,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709932670] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:53:11,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130278005] [2022-03-17 15:53:11,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:53:11,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:53:11,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:53:11,366 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:53:11,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-17 15:53:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:11,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-17 15:53:11,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:53:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:53:12,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:53:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-17 15:53:12,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130278005] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:53:12,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:53:12,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 13] total 20 [2022-03-17 15:53:12,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101564938] [2022-03-17 15:53:12,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:53:12,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:53:12,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:53:12,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:53:12,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-17 15:53:12,673 INFO L87 Difference]: Start difference. First operand 407 states and 586 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:53:14,705 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:16,836 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:19,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:21,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:23,340 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:25,523 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:27,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:27,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:53:27,894 INFO L93 Difference]: Finished difference Result 435 states and 628 transitions. [2022-03-17 15:53:27,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:53:27,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-03-17 15:53:27,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:53:27,896 INFO L225 Difference]: With dead ends: 435 [2022-03-17 15:53:27,896 INFO L226 Difference]: Without dead ends: 435 [2022-03-17 15:53:27,896 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-03-17 15:53:27,896 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:53:27,896 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 56 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 7 Unknown, 0 Unchecked, 15.2s Time] [2022-03-17 15:53:27,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-03-17 15:53:27,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2022-03-17 15:53:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 365 states have (on average 1.5315068493150685) internal successors, (559), 365 states have internal predecessors, (559), 35 states have call successors, (35), 35 states have call predecessors, (35), 34 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-17 15:53:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 628 transitions. [2022-03-17 15:53:27,902 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 628 transitions. Word has length 51 [2022-03-17 15:53:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:53:27,902 INFO L478 AbstractCegarLoop]: Abstraction has 435 states and 628 transitions. [2022-03-17 15:53:27,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:53:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 628 transitions. [2022-03-17 15:53:27,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-17 15:53:27,903 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:53:27,903 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:53:27,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-17 15:53:28,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:53:28,104 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:53:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:53:28,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1844604111, now seen corresponding path program 1 times [2022-03-17 15:53:28,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:53:28,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567242937] [2022-03-17 15:53:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:53:28,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:53:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:28,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:53:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:28,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:53:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:28,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-03-17 15:53:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:28,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-03-17 15:53:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:53:28,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:53:28,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567242937] [2022-03-17 15:53:28,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567242937] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:53:28,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588043806] [2022-03-17 15:53:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:53:28,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:53:28,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:53:28,243 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:53:28,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-17 15:53:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:28,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-17 15:53:28,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:53:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 15:53:29,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:53:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-03-17 15:53:29,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588043806] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:53:29,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:53:29,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 13] total 20 [2022-03-17 15:53:29,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356262404] [2022-03-17 15:53:29,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:53:29,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:53:29,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:53:29,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:53:29,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-03-17 15:53:29,564 INFO L87 Difference]: Start difference. First operand 435 states and 628 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:53:31,600 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:33,734 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:35,937 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:38,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:40,401 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:40,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:53:40,658 INFO L93 Difference]: Finished difference Result 449 states and 649 transitions. [2022-03-17 15:53:40,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:53:40,659 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-03-17 15:53:40,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:53:40,660 INFO L225 Difference]: With dead ends: 449 [2022-03-17 15:53:40,660 INFO L226 Difference]: Without dead ends: 449 [2022-03-17 15:53:40,660 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-03-17 15:53:40,661 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:53:40,661 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 56 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 5 Unknown, 0 Unchecked, 11.1s Time] [2022-03-17 15:53:40,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-03-17 15:53:40,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 395. [2022-03-17 15:53:40,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 331 states have (on average 1.5287009063444108) internal successors, (506), 331 states have internal predecessors, (506), 32 states have call successors, (32), 32 states have call predecessors, (32), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-17 15:53:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 569 transitions. [2022-03-17 15:53:40,666 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 569 transitions. Word has length 52 [2022-03-17 15:53:40,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:53:40,666 INFO L478 AbstractCegarLoop]: Abstraction has 395 states and 569 transitions. [2022-03-17 15:53:40,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:53:40,666 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 569 transitions. [2022-03-17 15:53:40,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-17 15:53:40,667 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:53:40,667 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:53:40,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-17 15:53:40,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:53:40,884 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:53:40,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:53:40,884 INFO L85 PathProgramCache]: Analyzing trace with hash -824384392, now seen corresponding path program 1 times [2022-03-17 15:53:40,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:53:40,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159366690] [2022-03-17 15:53:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:53:40,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:53:40,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:40,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:53:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:40,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:53:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:40,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:53:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:40,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-17 15:53:40,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:40,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-03-17 15:53:40,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:40,974 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-17 15:53:40,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:53:40,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159366690] [2022-03-17 15:53:40,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159366690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:53:40,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227758171] [2022-03-17 15:53:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:53:40,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:53:40,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:53:40,988 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:53:40,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-17 15:53:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:53:41,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-17 15:53:41,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:53:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:53:42,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:53:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-17 15:53:42,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227758171] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:53:42,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:53:42,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 15] total 22 [2022-03-17 15:53:42,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192541266] [2022-03-17 15:53:42,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:53:42,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:53:42,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:53:42,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:53:42,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-03-17 15:53:42,409 INFO L87 Difference]: Start difference. First operand 395 states and 569 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:53:44,448 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:46,637 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:48,818 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:51,011 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:53,151 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:55,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:57,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:59,608 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:53:59,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:53:59,735 INFO L93 Difference]: Finished difference Result 421 states and 607 transitions. [2022-03-17 15:53:59,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:53:59,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-03-17 15:53:59,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:53:59,737 INFO L225 Difference]: With dead ends: 421 [2022-03-17 15:53:59,737 INFO L226 Difference]: Without dead ends: 421 [2022-03-17 15:53:59,737 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-03-17 15:53:59,738 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2022-03-17 15:53:59,738 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 63 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 8 Unknown, 0 Unchecked, 17.3s Time] [2022-03-17 15:53:59,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-03-17 15:53:59,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 331. [2022-03-17 15:53:59,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 279 states have (on average 1.5483870967741935) internal successors, (432), 279 states have internal predecessors, (432), 26 states have call successors, (26), 26 states have call predecessors, (26), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-17 15:53:59,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 483 transitions. [2022-03-17 15:53:59,742 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 483 transitions. Word has length 56 [2022-03-17 15:53:59,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:53:59,742 INFO L478 AbstractCegarLoop]: Abstraction has 331 states and 483 transitions. [2022-03-17 15:53:59,742 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:53:59,742 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 483 transitions. [2022-03-17 15:53:59,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-17 15:53:59,743 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:53:59,743 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:53:59,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-17 15:53:59,960 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-17 15:53:59,960 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:53:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:53:59,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1280536761, now seen corresponding path program 1 times [2022-03-17 15:53:59,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:53:59,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733895626] [2022-03-17 15:53:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:53:59,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:53:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:00,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:54:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:00,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:54:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:00,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:54:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:00,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-17 15:54:00,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:00,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-17 15:54:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-03-17 15:54:00,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:54:00,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733895626] [2022-03-17 15:54:00,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733895626] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:54:00,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376641515] [2022-03-17 15:54:00,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:54:00,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:54:00,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:54:00,163 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:54:00,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-17 15:54:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:00,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-17 15:54:00,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:54:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:54:01,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:54:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-17 15:54:01,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376641515] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:54:01,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:54:01,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 15] total 23 [2022-03-17 15:54:01,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436446432] [2022-03-17 15:54:01,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:54:01,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:54:01,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:54:01,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:54:01,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-03-17 15:54:01,542 INFO L87 Difference]: Start difference. First operand 331 states and 483 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:54:03,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:05,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:07,988 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:10,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:12,412 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:12,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:54:12,556 INFO L93 Difference]: Finished difference Result 357 states and 521 transitions. [2022-03-17 15:54:12,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:54:12,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2022-03-17 15:54:12,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:54:12,558 INFO L225 Difference]: With dead ends: 357 [2022-03-17 15:54:12,558 INFO L226 Difference]: Without dead ends: 357 [2022-03-17 15:54:12,558 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 102 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-03-17 15:54:12,558 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:54:12,558 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 62 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 5 Unknown, 0 Unchecked, 11.0s Time] [2022-03-17 15:54:12,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-03-17 15:54:12,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 281. [2022-03-17 15:54:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 237 states have (on average 1.5527426160337552) internal successors, (368), 237 states have internal predecessors, (368), 22 states have call successors, (22), 22 states have call predecessors, (22), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-17 15:54:12,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 411 transitions. [2022-03-17 15:54:12,562 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 411 transitions. Word has length 57 [2022-03-17 15:54:12,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:54:12,562 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 411 transitions. [2022-03-17 15:54:12,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:54:12,562 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 411 transitions. [2022-03-17 15:54:12,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-17 15:54:12,563 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:54:12,563 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:54:12,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-17 15:54:12,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-17 15:54:12,771 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:54:12,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:54:12,772 INFO L85 PathProgramCache]: Analyzing trace with hash 170261082, now seen corresponding path program 1 times [2022-03-17 15:54:12,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:54:12,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837655468] [2022-03-17 15:54:12,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:54:12,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:54:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:12,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:54:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:12,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:54:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:12,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:54:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:12,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-17 15:54:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:12,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-03-17 15:54:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-17 15:54:12,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:54:12,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837655468] [2022-03-17 15:54:12,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837655468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:54:12,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258184042] [2022-03-17 15:54:12,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:54:12,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:54:12,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:54:12,864 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:54:12,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-17 15:54:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:12,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-17 15:54:12,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:54:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:54:13,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:54:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-17 15:54:14,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258184042] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:54:14,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:54:14,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 15] total 22 [2022-03-17 15:54:14,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441174758] [2022-03-17 15:54:14,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:54:14,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:54:14,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:54:14,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:54:14,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-03-17 15:54:14,300 INFO L87 Difference]: Start difference. First operand 281 states and 411 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:54:16,341 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:18,533 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:20,715 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:22,936 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:25,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:25,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:54:25,333 INFO L93 Difference]: Finished difference Result 335 states and 491 transitions. [2022-03-17 15:54:25,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:54:25,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-03-17 15:54:25,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:54:25,334 INFO L225 Difference]: With dead ends: 335 [2022-03-17 15:54:25,335 INFO L226 Difference]: Without dead ends: 335 [2022-03-17 15:54:25,335 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 106 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-03-17 15:54:25,335 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:54:25,335 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 56 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 5 Unknown, 0 Unchecked, 11.0s Time] [2022-03-17 15:54:25,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-03-17 15:54:25,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 227. [2022-03-17 15:54:25,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 191 states have (on average 1.549738219895288) internal successors, (296), 191 states have internal predecessors, (296), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 15:54:25,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 331 transitions. [2022-03-17 15:54:25,338 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 331 transitions. Word has length 58 [2022-03-17 15:54:25,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:54:25,338 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 331 transitions. [2022-03-17 15:54:25,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:54:25,339 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 331 transitions. [2022-03-17 15:54:25,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-17 15:54:25,339 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:54:25,339 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:54:25,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-17 15:54:25,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-17 15:54:25,540 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:54:25,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:54:25,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1230475683, now seen corresponding path program 1 times [2022-03-17 15:54:25,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:54:25,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352009246] [2022-03-17 15:54:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:54:25,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:54:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:25,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:54:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:25,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:54:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:25,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:54:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:25,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-17 15:54:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:25,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-17 15:54:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:54:25,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:54:25,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352009246] [2022-03-17 15:54:25,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352009246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:54:25,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520420335] [2022-03-17 15:54:25,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:54:25,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:54:25,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:54:25,672 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:54:25,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-17 15:54:25,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:25,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-17 15:54:25,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:54:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:54:26,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:54:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-03-17 15:54:27,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520420335] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:54:27,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:54:27,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 15] total 23 [2022-03-17 15:54:27,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340849454] [2022-03-17 15:54:27,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:54:27,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:54:27,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:54:27,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:54:27,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-03-17 15:54:27,291 INFO L87 Difference]: Start difference. First operand 227 states and 331 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:54:29,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:31,525 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:33,706 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:35,882 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:38,043 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:38,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:54:38,260 INFO L93 Difference]: Finished difference Result 335 states and 491 transitions. [2022-03-17 15:54:38,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:54:38,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-03-17 15:54:38,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:54:38,261 INFO L225 Difference]: With dead ends: 335 [2022-03-17 15:54:38,261 INFO L226 Difference]: Without dead ends: 335 [2022-03-17 15:54:38,262 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 110 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-03-17 15:54:38,262 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:54:38,262 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 56 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 5 Unknown, 0 Unchecked, 11.0s Time] [2022-03-17 15:54:38,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-03-17 15:54:38,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 227. [2022-03-17 15:54:38,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 191 states have (on average 1.549738219895288) internal successors, (296), 191 states have internal predecessors, (296), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-17 15:54:38,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 331 transitions. [2022-03-17 15:54:38,265 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 331 transitions. Word has length 60 [2022-03-17 15:54:38,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:54:38,265 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 331 transitions. [2022-03-17 15:54:38,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:54:38,265 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 331 transitions. [2022-03-17 15:54:38,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-17 15:54:38,266 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:54:38,266 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:54:38,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-17 15:54:38,475 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:54:38,475 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:54:38,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:54:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash 640308723, now seen corresponding path program 1 times [2022-03-17 15:54:38,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:54:38,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206018593] [2022-03-17 15:54:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:54:38,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:54:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:38,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:54:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:38,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:54:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:38,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:54:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:38,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-03-17 15:54:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:38,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-03-17 15:54:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:38,557 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 25 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-17 15:54:38,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:54:38,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206018593] [2022-03-17 15:54:38,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206018593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:54:38,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409288926] [2022-03-17 15:54:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:54:38,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:54:38,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:54:38,559 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:54:38,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-17 15:54:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:38,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-17 15:54:38,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:54:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 54 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-17 15:54:39,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:54:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-03-17 15:54:40,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409288926] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:54:40,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:54:40,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 15] total 22 [2022-03-17 15:54:40,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301015531] [2022-03-17 15:54:40,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:54:40,162 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:54:40,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:54:40,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:54:40,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-03-17 15:54:40,162 INFO L87 Difference]: Start difference. First operand 227 states and 331 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:54:42,197 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:44,383 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:46,501 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:48,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:50,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:53,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:53,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:54:53,326 INFO L93 Difference]: Finished difference Result 443 states and 651 transitions. [2022-03-17 15:54:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:54:53,326 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-03-17 15:54:53,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:54:53,328 INFO L225 Difference]: With dead ends: 443 [2022-03-17 15:54:53,328 INFO L226 Difference]: Without dead ends: 443 [2022-03-17 15:54:53,328 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 112 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-03-17 15:54:53,328 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:54:53,329 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 56 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 6 Unknown, 0 Unchecked, 13.1s Time] [2022-03-17 15:54:53,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-03-17 15:54:53,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2022-03-17 15:54:53,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 375 states have (on average 1.5573333333333332) internal successors, (584), 375 states have internal predecessors, (584), 34 states have call successors, (34), 34 states have call predecessors, (34), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-17 15:54:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 651 transitions. [2022-03-17 15:54:53,335 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 651 transitions. Word has length 61 [2022-03-17 15:54:53,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:54:53,335 INFO L478 AbstractCegarLoop]: Abstraction has 443 states and 651 transitions. [2022-03-17 15:54:53,335 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:54:53,335 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 651 transitions. [2022-03-17 15:54:53,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-17 15:54:53,336 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:54:53,336 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:54:53,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-17 15:54:53,549 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-17 15:54:53,550 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:54:53,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:54:53,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1985533792, now seen corresponding path program 1 times [2022-03-17 15:54:53,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:54:53,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861910323] [2022-03-17 15:54:53,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:54:53,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:54:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:53,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:54:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:53,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-03-17 15:54:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:53,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-03-17 15:54:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:53,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-03-17 15:54:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:53,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-03-17 15:54:53,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:53,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-03-17 15:54:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:53,660 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 46 proven. 43 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-03-17 15:54:53,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:54:53,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861910323] [2022-03-17 15:54:53,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861910323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:54:53,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273280798] [2022-03-17 15:54:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:54:53,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:54:53,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:54:53,662 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:54:53,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-17 15:54:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:54:53,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-17 15:54:53,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:54:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 10 proven. 81 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-17 15:54:54,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:54:55,361 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-17 15:54:55,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273280798] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-17 15:54:55,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-17 15:54:55,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 17] total 25 [2022-03-17 15:54:55,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667929142] [2022-03-17 15:54:55,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:54:55,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:54:55,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:54:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:54:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-03-17 15:54:55,362 INFO L87 Difference]: Start difference. First operand 443 states and 651 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:54:57,398 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:54:59,509 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:55:01,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:55:03,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:55:06,027 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:55:08,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:55:10,385 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:55:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:55:10,602 INFO L93 Difference]: Finished difference Result 441 states and 649 transitions. [2022-03-17 15:55:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:55:10,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-03-17 15:55:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:55:10,603 INFO L225 Difference]: With dead ends: 441 [2022-03-17 15:55:10,603 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 15:55:10,603 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 131 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-03-17 15:55:10,603 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:55:10,604 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 39 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 7 Unknown, 0 Unchecked, 15.2s Time] [2022-03-17 15:55:10,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 15:55:10,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 15:55:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 15:55:10,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 15:55:10,604 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 71 [2022-03-17 15:55:10,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:55:10,604 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 15:55:10,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-17 15:55:10,604 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 15:55:10,604 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 15:55:10,607 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 15:55:10,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-17 15:55:10,813 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-17 15:55:10,816 INFO L718 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:55:10,816 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 15:55:10,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:55:10 BasicIcfg [2022-03-17 15:55:10,818 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 15:55:10,818 INFO L158 Benchmark]: Toolchain (without parser) took 783469.02ms. Allocated memory was 200.3MB in the beginning and 323.0MB in the end (delta: 122.7MB). Free memory was 144.4MB in the beginning and 284.9MB in the end (delta: -140.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 15:55:10,818 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 200.3MB. Free memory is still 160.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 15:55:10,818 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.36ms. Allocated memory was 200.3MB in the beginning and 323.0MB in the end (delta: 122.7MB). Free memory was 144.1MB in the beginning and 293.9MB in the end (delta: -149.7MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. [2022-03-17 15:55:10,819 INFO L158 Benchmark]: Boogie Preprocessor took 29.05ms. Allocated memory is still 323.0MB. Free memory was 293.9MB in the beginning and 292.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 15:55:10,821 INFO L158 Benchmark]: RCFGBuilder took 8962.87ms. Allocated memory is still 323.0MB. Free memory was 292.3MB in the beginning and 278.1MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-03-17 15:55:10,821 INFO L158 Benchmark]: IcfgTransformer took 15.24ms. Allocated memory is still 323.0MB. Free memory was 278.1MB in the beginning and 276.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 15:55:10,821 INFO L158 Benchmark]: TraceAbstraction took 774235.31ms. Allocated memory is still 323.0MB. Free memory was 276.6MB in the beginning and 284.9MB in the end (delta: -8.4MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 15:55:10,822 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 200.3MB. Free memory is still 160.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 220.36ms. Allocated memory was 200.3MB in the beginning and 323.0MB in the end (delta: 122.7MB). Free memory was 144.1MB in the beginning and 293.9MB in the end (delta: -149.7MB). Peak memory consumption was 12.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.05ms. Allocated memory is still 323.0MB. Free memory was 293.9MB in the beginning and 292.3MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 8962.87ms. Allocated memory is still 323.0MB. Free memory was 292.3MB in the beginning and 278.1MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * IcfgTransformer took 15.24ms. Allocated memory is still 323.0MB. Free memory was 278.1MB in the beginning and 276.6MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 774235.31ms. Allocated memory is still 323.0MB. Free memory was 276.6MB in the beginning and 284.9MB in the end (delta: -8.4MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 10]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 774.2s, OverallIterations: 39, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 720.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 329 mSolverCounterUnknown, 257 SdHoareTripleChecker+Valid, 719.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 256 mSDsluCounter, 2444 SdHoareTripleChecker+Invalid, 669.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1881 mSDsCounter, 54 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2637 IncrementalHoareTripleChecker+Invalid, 3020 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 54 mSolverCounterUnsat, 563 mSDtfsCounter, 2637 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3714 GetRequests, 2844 SyntacticMatches, 191 SemanticMatches, 679 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3796 ImplicationChecksByTransitivity, 16.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=443occurred in iteration=38, InterpolantAutomatonStates: 237, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 39 MinimizatonAttempts, 746 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 43.6s InterpolantComputationTime, 3194 NumberOfCodeBlocks, 3194 NumberOfCodeBlocksAsserted, 77 NumberOfCheckSat, 4669 ConstructedInterpolants, 0 QuantifiedInterpolants, 51648 SizeOfPredicates, 38 NumberOfNonLiveVariables, 5002 ConjunctsInSsa, 1326 ConjunctsInUnsatCore, 115 InterpolantComputations, 39 PerfectInterpolantSequences, 3048/4365 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-17 15:55:10,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...