/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/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:40:42,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:40:42,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:40:42,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 08:40:42,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:40:42,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:40:42,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:40:42,952 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 08:40:42,977 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:40:42,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:40:42,978 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:40:42,979 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:40:42,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:40:42,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:40:42,980 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:40:42,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:40:42,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:40:42,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:40:42,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:40:42,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:40:42,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:40:42,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:40:42,981 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:40:42,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:40:42,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:40:42,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:40:42,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:40:42,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:40:42,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:40:42,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:40:42,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:40:42,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:40:42,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:40:42,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:40:42,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:40:42,983 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:40:42,983 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:40:42,983 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:40:43,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:40:43,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:40:43,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:40:43,211 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:40:43,211 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:40:43,212 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2022-03-20 08:40:43,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0646569f4/76f1c67432664c119a568e6c63bc18f2/FLAG36a39f524 [2022-03-20 08:40:43,619 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:40:43,620 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2022-03-20 08:40:43,624 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0646569f4/76f1c67432664c119a568e6c63bc18f2/FLAG36a39f524 [2022-03-20 08:40:43,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0646569f4/76f1c67432664c119a568e6c63bc18f2 [2022-03-20 08:40:43,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:40:43,638 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:40:43,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:40:43,640 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:40:43,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:40:43,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:40:43" (1/1) ... [2022-03-20 08:40:43,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@211d8379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:40:43, skipping insertion in model container [2022-03-20 08:40:43,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:40:43" (1/1) ... [2022-03-20 08:40:43,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:40:43,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:40:43,772 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/Mono4_1.c[311,324] [2022-03-20 08:40:43,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:40:43,799 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:40:43,806 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/Mono4_1.c[311,324] [2022-03-20 08:40:43,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:40:43,816 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:40:43,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:40:43 WrapperNode [2022-03-20 08:40:43,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:40:43,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:40:43,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:40:43,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:40:43,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:40:43" (1/1) ... [2022-03-20 08:40:43,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:40:43" (1/1) ... [2022-03-20 08:40:43,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:40:43" (1/1) ... [2022-03-20 08:40:43,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:40:43" (1/1) ... [2022-03-20 08:40:43,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:40:43" (1/1) ... [2022-03-20 08:40:43,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:40:43" (1/1) ... [2022-03-20 08:40:43,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:40:43" (1/1) ... [2022-03-20 08:40:43,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:40:43,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:40:43,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:40:43,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:40:43,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:40:43" (1/1) ... [2022-03-20 08:40:43,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:40:43,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:40:43,875 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) [2022-03-20 08:40:43,895 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 [2022-03-20 08:40:43,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:40:43,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:40:43,913 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:40:43,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:40:43,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:40:43,913 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:40:43,913 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:40:43,914 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:40:43,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:40:43,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:40:43,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:40:43,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:40:43,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:40:43,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:40:43,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:40:43,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:40:43,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:40:43,961 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:40:43,962 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:40:44,052 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:40:44,056 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:40:44,056 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 08:40:44,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:40:44 BoogieIcfgContainer [2022-03-20 08:40:44,057 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:40:44,057 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:40:44,057 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:40:44,071 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:40:44,073 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:40:44" (1/1) ... [2022-03-20 08:40:44,074 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:40:44,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:40:44 BasicIcfg [2022-03-20 08:40:44,082 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:40:44,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:40:44,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:40:44,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:40:44,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:40:43" (1/4) ... [2022-03-20 08:40:44,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67029356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:40:44, skipping insertion in model container [2022-03-20 08:40:44,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:40:43" (2/4) ... [2022-03-20 08:40:44,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67029356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:40:44, skipping insertion in model container [2022-03-20 08:40:44,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:40:44" (3/4) ... [2022-03-20 08:40:44,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67029356 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:40:44, skipping insertion in model container [2022-03-20 08:40:44,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:40:44" (4/4) ... [2022-03-20 08:40:44,086 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono4_1.cqvasr [2022-03-20 08:40:44,103 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:40:44,103 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:40:44,138 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:40:44,164 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 08:40:44,164 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:40:44,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-03-20 08:40:44,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 08:40:44,177 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:40:44,178 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:40:44,178 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:40:44,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:40:44,182 INFO L85 PathProgramCache]: Analyzing trace with hash -154368955, now seen corresponding path program 1 times [2022-03-20 08:40:44,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:40:44,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821568860] [2022-03-20 08:40:44,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:40:44,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:40:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:44,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:40:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:40:44,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:40:44,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821568860] [2022-03-20 08:40:44,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821568860] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:40:44,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:40:44,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:40:44,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137384449] [2022-03-20 08:40:44,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:40:44,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:40:44,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:40:44,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:40:44,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:40:44,340 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-03-20 08:40:44,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:40:44,366 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-20 08:40:44,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:40:44,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-03-20 08:40:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:40:44,371 INFO L225 Difference]: With dead ends: 32 [2022-03-20 08:40:44,371 INFO L226 Difference]: Without dead ends: 13 [2022-03-20 08:40:44,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:40:44,376 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:40:44,377 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:40:44,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-20 08:40:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-20 08:40:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 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) [2022-03-20 08:40:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-20 08:40:44,396 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-20 08:40:44,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:40:44,396 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-20 08:40:44,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-03-20 08:40:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-20 08:40:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 08:40:44,397 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:40:44,397 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:40:44,397 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:40:44,397 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:40:44,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:40:44,398 INFO L85 PathProgramCache]: Analyzing trace with hash -153445434, now seen corresponding path program 1 times [2022-03-20 08:40:44,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:40:44,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589238432] [2022-03-20 08:40:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:40:44,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:40:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:44,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:40:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:40:44,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:40:44,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589238432] [2022-03-20 08:40:44,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589238432] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:40:44,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:40:44,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:40:44,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451613815] [2022-03-20 08:40:44,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:40:44,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:40:44,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:40:44,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:40:44,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:40:44,460 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-03-20 08:40:44,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:40:44,492 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-03-20 08:40:44,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:40:44,492 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2022-03-20 08:40:44,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:40:44,492 INFO L225 Difference]: With dead ends: 22 [2022-03-20 08:40:44,493 INFO L226 Difference]: Without dead ends: 15 [2022-03-20 08:40:44,493 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 08:40:44,494 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:40:44,494 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:40:44,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-20 08:40:44,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-20 08:40:44,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 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) [2022-03-20 08:40:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-20 08:40:44,497 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-20 08:40:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:40:44,497 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-20 08:40:44,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-03-20 08:40:44,497 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-20 08:40:44,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 08:40:44,498 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:40:44,498 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:40:44,498 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:40:44,498 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:40:44,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:40:44,499 INFO L85 PathProgramCache]: Analyzing trace with hash -521762940, now seen corresponding path program 1 times [2022-03-20 08:40:44,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:40:44,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257723087] [2022-03-20 08:40:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:40:44,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:40:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:44,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:40:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:44,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:40:44,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:40:44,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257723087] [2022-03-20 08:40:44,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257723087] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:40:44,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554203929] [2022-03-20 08:40:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:40:44,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:40:44,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:40:44,572 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) [2022-03-20 08:40:44,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 08:40:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:44,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 08:40:44,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:40:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:40:44,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:40:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:40:44,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554203929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:40:44,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:40:44,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-20 08:40:44,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519369156] [2022-03-20 08:40:44,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:40:44,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 08:40:44,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:40:44,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 08:40:44,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-20 08:40:44,732 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:40:44,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:40:44,817 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-03-20 08:40:44,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 08:40:44,817 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-20 08:40:44,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:40:44,818 INFO L225 Difference]: With dead ends: 27 [2022-03-20 08:40:44,818 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 08:40:44,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-20 08:40:44,819 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:40:44,820 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 23 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:40:44,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 08:40:44,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-20 08:40:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 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) [2022-03-20 08:40:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-03-20 08:40:44,823 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2022-03-20 08:40:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:40:44,823 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-03-20 08:40:44,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:40:44,824 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-03-20 08:40:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 08:40:44,824 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:40:44,824 INFO L499 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:40:44,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 08:40:45,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:40:45,040 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:40:45,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:40:45,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1491075900, now seen corresponding path program 1 times [2022-03-20 08:40:45,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:40:45,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189456176] [2022-03-20 08:40:45,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:40:45,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:40:45,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:45,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:40:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:40:45,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:40:45,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189456176] [2022-03-20 08:40:45,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189456176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:40:45,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012216216] [2022-03-20 08:40:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:40:45,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:40:45,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:40:45,140 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) [2022-03-20 08:40:45,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 08:40:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:45,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 08:40:45,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:40:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:40:45,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:40:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:40:45,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012216216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:40:45,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:40:45,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-20 08:40:45,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490602130] [2022-03-20 08:40:45,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:40:45,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 08:40:45,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:40:45,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 08:40:45,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-20 08:40:45,291 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:40:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:40:45,373 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-03-20 08:40:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 08:40:45,373 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-20 08:40:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:40:45,374 INFO L225 Difference]: With dead ends: 38 [2022-03-20 08:40:45,374 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 08:40:45,375 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-20 08:40:45,375 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:40:45,376 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:40:45,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 08:40:45,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-20 08:40:45,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:40:45,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-03-20 08:40:45,380 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 19 [2022-03-20 08:40:45,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:40:45,380 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-03-20 08:40:45,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:40:45,380 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-03-20 08:40:45,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 08:40:45,381 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:40:45,381 INFO L499 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:40:45,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 08:40:45,581 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,SelfDestructingSolverStorable3 [2022-03-20 08:40:45,582 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:40:45,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:40:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash 44690740, now seen corresponding path program 2 times [2022-03-20 08:40:45,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:40:45,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230394536] [2022-03-20 08:40:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:40:45,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:40:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:45,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:40:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:40:45,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:40:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230394536] [2022-03-20 08:40:45,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230394536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:40:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957789356] [2022-03-20 08:40:45,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:40:45,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:40:45,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:40:45,678 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) [2022-03-20 08:40:45,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 08:40:45,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:40:45,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:40:45,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-20 08:40:45,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:40:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:40:45,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:40:45,937 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:40:45,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957789356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:40:45,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:40:45,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-20 08:40:45,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158801702] [2022-03-20 08:40:45,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:40:45,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 08:40:45,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:40:45,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 08:40:45,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-03-20 08:40:45,939 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:40:46,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:40:46,127 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2022-03-20 08:40:46,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 08:40:46,128 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 08:40:46,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:40:46,130 INFO L225 Difference]: With dead ends: 54 [2022-03-20 08:40:46,130 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 08:40:46,131 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2022-03-20 08:40:46,134 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:40:46,134 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:40:46,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 08:40:46,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-20 08:40:46,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 3 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) [2022-03-20 08:40:46,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-03-20 08:40:46,151 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 27 [2022-03-20 08:40:46,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:40:46,151 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-03-20 08:40:46,151 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:40:46,151 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-03-20 08:40:46,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 08:40:46,152 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:40:46,153 INFO L499 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:40:46,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 08:40:46,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:40:46,368 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:40:46,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:40:46,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1982683428, now seen corresponding path program 3 times [2022-03-20 08:40:46,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:40:46,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889557400] [2022-03-20 08:40:46,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:40:46,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:40:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:46,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:40:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 08:40:46,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:40:46,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889557400] [2022-03-20 08:40:46,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889557400] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:40:46,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798224383] [2022-03-20 08:40:46,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:40:46,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:40:46,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:40:46,514 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) [2022-03-20 08:40:46,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 08:40:46,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 08:40:46,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:40:46,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 08:40:46,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:40:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-20 08:40:46,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:40:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-03-20 08:40:46,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798224383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:40:46,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:40:46,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8, 8] total 28 [2022-03-20 08:40:46,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217224398] [2022-03-20 08:40:46,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:40:46,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 08:40:46,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:40:46,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 08:40:46,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-03-20 08:40:46,864 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 28 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:40:47,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:40:47,347 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2022-03-20 08:40:47,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 08:40:47,347 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-20 08:40:47,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:40:47,348 INFO L225 Difference]: With dead ends: 88 [2022-03-20 08:40:47,362 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 08:40:47,363 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=739, Invalid=2231, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 08:40:47,364 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 102 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:40:47,364 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 52 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:40:47,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 08:40:47,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2022-03-20 08:40:47,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 3 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) [2022-03-20 08:40:47,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2022-03-20 08:40:47,370 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2022-03-20 08:40:47,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:40:47,370 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2022-03-20 08:40:47,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:40:47,370 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2022-03-20 08:40:47,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 08:40:47,376 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:40:47,376 INFO L499 BasicCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:40:47,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 08:40:47,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:40:47,587 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:40:47,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:40:47,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2103021866, now seen corresponding path program 4 times [2022-03-20 08:40:47,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:40:47,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411596149] [2022-03-20 08:40:47,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:40:47,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:40:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:47,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:40:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 08:40:47,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:40:47,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411596149] [2022-03-20 08:40:47,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411596149] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:40:47,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871770943] [2022-03-20 08:40:47,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 08:40:47,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:40:47,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:40:47,760 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) [2022-03-20 08:40:47,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 08:40:47,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 08:40:47,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:40:47,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 08:40:47,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:40:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 08:40:47,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:40:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 08:40:48,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871770943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:40:48,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:40:48,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 36 [2022-03-20 08:40:48,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949933325] [2022-03-20 08:40:48,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:40:48,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 08:40:48,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:40:48,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 08:40:48,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 08:40:48,241 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:40:48,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:40:48,737 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2022-03-20 08:40:48,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 08:40:48,737 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-20 08:40:48,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:40:48,738 INFO L225 Difference]: With dead ends: 104 [2022-03-20 08:40:48,738 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 08:40:48,740 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 08:40:48,741 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 08:40:48,741 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 39 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 08:40:48,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 08:40:48,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-20 08:40:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 83 states have internal predecessors, (90), 3 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) [2022-03-20 08:40:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2022-03-20 08:40:48,748 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 53 [2022-03-20 08:40:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:40:48,748 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2022-03-20 08:40:48,748 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:40:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2022-03-20 08:40:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 08:40:48,750 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:40:48,750 INFO L499 BasicCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:40:48,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 08:40:48,965 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:40:48,965 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:40:48,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:40:48,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1986185996, now seen corresponding path program 5 times [2022-03-20 08:40:48,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:40:48,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453954193] [2022-03-20 08:40:48,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:40:48,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:40:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:49,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:40:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 08:40:49,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:40:49,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453954193] [2022-03-20 08:40:49,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453954193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:40:49,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248371242] [2022-03-20 08:40:49,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 08:40:49,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:40:49,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:40:49,475 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) [2022-03-20 08:40:49,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 08:40:49,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-03-20 08:40:49,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:40:49,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-20 08:40:49,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:40:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 08:40:49,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:40:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 08:40:50,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248371242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:40:50,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:40:50,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 70 [2022-03-20 08:40:50,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444662740] [2022-03-20 08:40:50,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:40:50,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 08:40:50,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:40:50,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 08:40:50,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 08:40:50,900 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:40:52,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:40:52,509 INFO L93 Difference]: Finished difference Result 172 states and 217 transitions. [2022-03-20 08:40:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 08:40:52,509 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-03-20 08:40:52,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:40:52,511 INFO L225 Difference]: With dead ends: 172 [2022-03-20 08:40:52,511 INFO L226 Difference]: Without dead ends: 156 [2022-03-20 08:40:52,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2865 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 08:40:52,515 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:40:52,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 34 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:40:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-20 08:40:52,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-03-20 08:40:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0463576158940397) internal successors, (158), 151 states have internal predecessors, (158), 3 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) [2022-03-20 08:40:52,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 162 transitions. [2022-03-20 08:40:52,524 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 162 transitions. Word has length 87 [2022-03-20 08:40:52,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:40:52,525 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 162 transitions. [2022-03-20 08:40:52,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.085714285714286) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:40:52,525 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 162 transitions. [2022-03-20 08:40:52,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 08:40:52,526 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:40:52,526 INFO L499 BasicCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:40:52,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 08:40:52,726 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:40:52,727 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:40:52,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:40:52,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1296796336, now seen corresponding path program 6 times [2022-03-20 08:40:52,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:40:52,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72893365] [2022-03-20 08:40:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:40:52,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:40:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:54,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:40:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-03-20 08:40:54,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:40:54,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72893365] [2022-03-20 08:40:54,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72893365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:40:54,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223527736] [2022-03-20 08:40:54,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 08:40:54,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:40:54,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:40:54,307 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) [2022-03-20 08:40:54,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 08:40:54,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-03-20 08:40:54,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:40:54,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 08:40:54,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:40:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 762 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-03-20 08:40:54,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:40:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 762 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2022-03-20 08:40:55,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223527736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:40:55,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:40:55,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 12, 12] total 88 [2022-03-20 08:40:55,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879733009] [2022-03-20 08:40:55,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:40:55,344 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 08:40:55,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:40:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 08:40:55,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2484, Invalid=5172, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 08:40:55,346 INFO L87 Difference]: Start difference. First operand 156 states and 162 transitions. Second operand has 88 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 states have internal predecessors, (176), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:40:58,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:40:58,374 INFO L93 Difference]: Finished difference Result 230 states and 269 transitions. [2022-03-20 08:40:58,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 08:40:58,375 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 states have internal predecessors, (176), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-03-20 08:40:58,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:40:58,376 INFO L225 Difference]: With dead ends: 230 [2022-03-20 08:40:58,376 INFO L226 Difference]: Without dead ends: 204 [2022-03-20 08:40:58,385 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5540 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=9439, Invalid=22423, Unknown=0, NotChecked=0, Total=31862 [2022-03-20 08:40:58,392 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 308 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 08:40:58,392 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 77 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 08:40:58,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-03-20 08:40:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 174. [2022-03-20 08:40:58,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.0887573964497042) internal successors, (184), 169 states have internal predecessors, (184), 3 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) [2022-03-20 08:40:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 188 transitions. [2022-03-20 08:40:58,401 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 188 transitions. Word has length 155 [2022-03-20 08:40:58,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:40:58,401 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 188 transitions. [2022-03-20 08:40:58,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 states have internal predecessors, (176), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:40:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 188 transitions. [2022-03-20 08:40:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-20 08:40:58,403 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:40:58,403 INFO L499 BasicCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:40:58,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 08:40:58,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:40:58,616 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:40:58,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:40:58,616 INFO L85 PathProgramCache]: Analyzing trace with hash -140127658, now seen corresponding path program 7 times [2022-03-20 08:40:58,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:40:58,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488261992] [2022-03-20 08:40:58,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:40:58,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:40:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:59,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:40:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 08:40:59,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:40:59,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488261992] [2022-03-20 08:40:59,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488261992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:40:59,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424877180] [2022-03-20 08:40:59,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-20 08:40:59,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:40:59,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:40:59,861 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) [2022-03-20 08:40:59,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 08:40:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:40:59,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 08:40:59,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:41:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 08:41:00,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:41:04,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 08:41:04,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424877180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:41:04,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:41:04,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 70] total 140 [2022-03-20 08:41:04,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733930269] [2022-03-20 08:41:04,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:41:04,566 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-03-20 08:41:04,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:41:04,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-03-20 08:41:04,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-03-20 08:41:04,569 INFO L87 Difference]: Start difference. First operand 174 states and 188 transitions. Second operand has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:41:09,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:41:09,128 INFO L93 Difference]: Finished difference Result 344 states and 440 transitions. [2022-03-20 08:41:09,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-20 08:41:09,128 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-03-20 08:41:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:41:09,129 INFO L225 Difference]: With dead ends: 344 [2022-03-20 08:41:09,129 INFO L226 Difference]: Without dead ends: 312 [2022-03-20 08:41:09,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11860 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=28498, Invalid=47402, Unknown=0, NotChecked=0, Total=75900 [2022-03-20 08:41:09,147 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 144 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 08:41:09,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 34 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 08:41:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-20 08:41:09,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-03-20 08:41:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.0488599348534202) internal successors, (322), 307 states have internal predecessors, (322), 3 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) [2022-03-20 08:41:09,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 326 transitions. [2022-03-20 08:41:09,167 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 326 transitions. Word has length 173 [2022-03-20 08:41:09,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:41:09,167 INFO L478 AbstractCegarLoop]: Abstraction has 312 states and 326 transitions. [2022-03-20 08:41:09,167 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0428571428571427) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:41:09,168 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 326 transitions. [2022-03-20 08:41:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-03-20 08:41:09,170 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:41:09,170 INFO L499 BasicCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:41:09,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 08:41:09,383 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,SelfDestructingSolverStorable9 [2022-03-20 08:41:09,384 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:41:09,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:41:09,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1017097204, now seen corresponding path program 8 times [2022-03-20 08:41:09,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:41:09,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2726927] [2022-03-20 08:41:09,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:41:09,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:41:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:41:13,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:41:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:41:13,784 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 08:41:13,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:41:13,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2726927] [2022-03-20 08:41:13,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2726927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:41:13,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945565589] [2022-03-20 08:41:13,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 08:41:13,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:41:13,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:41:13,786 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) [2022-03-20 08:41:13,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 08:41:13,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 08:41:13,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:41:13,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 138 conjunts are in the unsatisfiable core [2022-03-20 08:41:13,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:41:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 08:41:14,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:41:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 08:41:27,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945565589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:41:27,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:41:27,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 139, 139] total 278 [2022-03-20 08:41:27,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773767607] [2022-03-20 08:41:27,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:41:27,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 278 states [2022-03-20 08:41:27,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:41:27,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 278 interpolants. [2022-03-20 08:41:27,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38228, Invalid=38778, Unknown=0, NotChecked=0, Total=77006 [2022-03-20 08:41:27,074 INFO L87 Difference]: Start difference. First operand 312 states and 326 transitions. Second operand has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:41:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:41:43,726 INFO L93 Difference]: Finished difference Result 620 states and 785 transitions. [2022-03-20 08:41:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-03-20 08:41:43,727 INFO L78 Accepts]: Start accepts. Automaton has has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2022-03-20 08:41:43,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:41:43,737 INFO L225 Difference]: With dead ends: 620 [2022-03-20 08:41:43,737 INFO L226 Difference]: Without dead ends: 588 [2022-03-20 08:41:43,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 550 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47533 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=114127, Invalid=190025, Unknown=0, NotChecked=0, Total=304152 [2022-03-20 08:41:43,748 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 282 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 08:41:43,748 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 49 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 08:41:43,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2022-03-20 08:41:43,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 588. [2022-03-20 08:41:43,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 583 states have (on average 1.0257289879931388) internal successors, (598), 583 states have internal predecessors, (598), 3 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) [2022-03-20 08:41:43,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 602 transitions. [2022-03-20 08:41:43,783 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 602 transitions. Word has length 311 [2022-03-20 08:41:43,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:41:43,784 INFO L478 AbstractCegarLoop]: Abstraction has 588 states and 602 transitions. [2022-03-20 08:41:43,784 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 278 states, 278 states have (on average 2.0215827338129495) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:41:43,784 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 602 transitions. [2022-03-20 08:41:43,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2022-03-20 08:41:43,790 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:41:43,790 INFO L499 BasicCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:41:43,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 08:41:43,999 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:41:43,999 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:41:44,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:41:44,000 INFO L85 PathProgramCache]: Analyzing trace with hash -845736712, now seen corresponding path program 9 times [2022-03-20 08:41:44,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:41:44,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472916800] [2022-03-20 08:41:44,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:41:44,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:41:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:42:02,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:42:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:42:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-03-20 08:42:02,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:42:02,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472916800] [2022-03-20 08:42:02,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472916800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:42:02,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637355055] [2022-03-20 08:42:02,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 08:42:02,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:42:02,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:42:02,732 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) [2022-03-20 08:42:02,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 08:42:02,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-03-20 08:42:02,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:42:02,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 08:42:02,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:42:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 0 proven. 7594 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-03-20 08:42:05,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:42:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 0 proven. 7594 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2022-03-20 08:42:07,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637355055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:42:07,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:42:07,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 20, 20] total 312 [2022-03-20 08:42:07,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521770093] [2022-03-20 08:42:07,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:42:07,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 312 states [2022-03-20 08:42:07,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:42:07,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 312 interpolants. [2022-03-20 08:42:07,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38748, Invalid=58284, Unknown=0, NotChecked=0, Total=97032 [2022-03-20 08:42:07,623 INFO L87 Difference]: Start difference. First operand 588 states and 602 transitions. Second operand has 312 states, 310 states have (on average 2.0129032258064514) internal successors, (624), 310 states have internal predecessors, (624), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:42:34,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:42:34,918 INFO L93 Difference]: Finished difference Result 726 states and 805 transitions. [2022-03-20 08:42:34,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 326 states. [2022-03-20 08:42:34,919 INFO L78 Accepts]: Start accepts. Automaton has has 312 states, 310 states have (on average 2.0129032258064514) internal successors, (624), 310 states have internal predecessors, (624), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 587 [2022-03-20 08:42:34,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:42:34,934 INFO L225 Difference]: With dead ends: 726 [2022-03-20 08:42:34,934 INFO L226 Difference]: Without dead ends: 676 [2022-03-20 08:42:34,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1775 GetRequests, 1141 SyntacticMatches, 1 SemanticMatches, 633 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62316 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=133171, Invalid=269419, Unknown=0, NotChecked=0, Total=402590 [2022-03-20 08:42:34,988 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 804 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 1449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1449 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 08:42:34,988 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 82 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1449 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 08:42:34,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-03-20 08:42:35,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 622. [2022-03-20 08:42:35,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 617 states have (on average 1.0502431118314424) internal successors, (648), 617 states have internal predecessors, (648), 3 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) [2022-03-20 08:42:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 652 transitions. [2022-03-20 08:42:35,030 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 652 transitions. Word has length 587 [2022-03-20 08:42:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:42:35,031 INFO L478 AbstractCegarLoop]: Abstraction has 622 states and 652 transitions. [2022-03-20 08:42:35,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 312 states, 310 states have (on average 2.0129032258064514) internal successors, (624), 310 states have internal predecessors, (624), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:42:35,031 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 652 transitions. [2022-03-20 08:42:35,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2022-03-20 08:42:35,045 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:42:35,046 INFO L499 BasicCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:42:35,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 08:42:35,265 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,SelfDestructingSolverStorable11 [2022-03-20 08:42:35,266 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:42:35,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:42:35,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1496477562, now seen corresponding path program 10 times [2022-03-20 08:42:35,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:42:35,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182863384] [2022-03-20 08:42:35,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:42:35,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:42:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:42:53,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:42:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:42:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 08:42:53,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:42:53,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182863384] [2022-03-20 08:42:53,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182863384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:42:53,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393736954] [2022-03-20 08:42:53,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 08:42:53,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:42:53,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:42:53,547 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) [2022-03-20 08:42:53,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 08:42:53,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 08:42:53,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:42:53,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 277 conjunts are in the unsatisfiable core [2022-03-20 08:42:53,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:42:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 08:42:54,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:43:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 08:43:47,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393736954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:43:47,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:43:47,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [279, 278, 278] total 556 [2022-03-20 08:43:47,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588884853] [2022-03-20 08:43:47,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:43:47,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 556 states [2022-03-20 08:43:47,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:43:47,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 556 interpolants. [2022-03-20 08:43:47,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153737, Invalid=154843, Unknown=0, NotChecked=0, Total=308580 [2022-03-20 08:43:47,984 INFO L87 Difference]: Start difference. First operand 622 states and 652 transitions. Second operand has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:45:00,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:45:00,713 INFO L93 Difference]: Finished difference Result 1240 states and 1576 transitions. [2022-03-20 08:45:00,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 555 states. [2022-03-20 08:45:00,714 INFO L78 Accepts]: Start accepts. Automaton has has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 621 [2022-03-20 08:45:00,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:45:00,718 INFO L225 Difference]: With dead ends: 1240 [2022-03-20 08:45:00,718 INFO L226 Difference]: Without dead ends: 1176 [2022-03-20 08:45:00,781 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 2073 GetRequests, 967 SyntacticMatches, 0 SemanticMatches, 1106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191676 ImplicationChecksByTransitivity, 135.7s TimeCoverageRelationStatistics Valid=460098, Invalid=766458, Unknown=0, NotChecked=0, Total=1226556 [2022-03-20 08:45:00,782 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 560 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 08:45:00,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 39 Invalid, 1974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 08:45:00,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-03-20 08:45:00,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1176. [2022-03-20 08:45:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1171 states have (on average 1.026473099914603) internal successors, (1202), 1171 states have internal predecessors, (1202), 3 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) [2022-03-20 08:45:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1206 transitions. [2022-03-20 08:45:00,812 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1206 transitions. Word has length 621 [2022-03-20 08:45:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:45:00,813 INFO L478 AbstractCegarLoop]: Abstraction has 1176 states and 1206 transitions. [2022-03-20 08:45:00,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 556 states, 556 states have (on average 2.0107913669064748) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:45:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1206 transitions. [2022-03-20 08:45:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1176 [2022-03-20 08:45:00,823 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:45:00,823 INFO L499 BasicCegarLoop]: trace histogram [582, 552, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:45:00,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 08:45:01,038 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,SelfDestructingSolverStorable12 [2022-03-20 08:45:01,038 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:45:01,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:45:01,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1282836636, now seen corresponding path program 11 times [2022-03-20 08:45:01,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:45:01,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402899570] [2022-03-20 08:45:01,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:45:01,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:45:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:46:17,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:46:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:46:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 08:46:17,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:46:17,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402899570] [2022-03-20 08:46:17,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402899570] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 08:46:17,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682039234] [2022-03-20 08:46:17,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-20 08:46:17,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 08:46:17,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:46:17,725 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) [2022-03-20 08:46:17,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 08:46:20,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 583 check-sat command(s) [2022-03-20 08:46:20,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 08:46:20,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 2441 conjuncts, 554 conjunts are in the unsatisfiable core [2022-03-20 08:46:20,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 08:46:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 08:46:22,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 08:49:09,407 INFO L134 CoverageAnalysis]: Checked inductivity of 338724 backedges. 32627 proven. 305256 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-03-20 08:49:09,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682039234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 08:49:09,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 08:49:09,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [556, 555, 555] total 1110 [2022-03-20 08:49:09,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918163823] [2022-03-20 08:49:09,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-20 08:49:09,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 1110 states [2022-03-20 08:49:09,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:49:09,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 1110 interpolants. [2022-03-20 08:49:09,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=614388, Invalid=616602, Unknown=0, NotChecked=0, Total=1230990 [2022-03-20 08:49:09,568 INFO L87 Difference]: Start difference. First operand 1176 states and 1206 transitions. Second operand has 1110 states, 1110 states have (on average 2.0054054054054054) internal successors, (2226), 1109 states have internal predecessors, (2226), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)