/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 15:31:52,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 15:31:52,902 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 15:31:52,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 15:31:52,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 15:31:52,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 15:31:52,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 15:31:52,970 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 15:31:52,978 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 15:31:52,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 15:31:52,979 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 15:31:52,979 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 15:31:52,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 15:31:52,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 15:31:52,980 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 15:31:52,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 15:31:52,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 15:31:52,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 15:31:52,981 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 15:31:52,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 15:31:52,981 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 15:31:52,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 15:31:52,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 15:31:52,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 15:31:52,981 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 15:31:52,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 15:31:52,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:31:52,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 15:31:52,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 15:31:52,982 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 15:31:52,982 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 15:31:53,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 15:31:53,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 15:31:53,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 15:31:53,153 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 15:31:53,153 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 15:31:53,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2022-03-17 15:31:53,195 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b066bc9b3/198fecaa28d348f2b0f8234bcb687a4d/FLAG8b7f85c28 [2022-03-17 15:31:53,567 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 15:31:53,567 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_8.c [2022-03-17 15:31:53,573 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b066bc9b3/198fecaa28d348f2b0f8234bcb687a4d/FLAG8b7f85c28 [2022-03-17 15:31:53,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b066bc9b3/198fecaa28d348f2b0f8234bcb687a4d [2022-03-17 15:31:53,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 15:31:53,594 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 15:31:53,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 15:31:53,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 15:31:53,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 15:31:53,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:31:53" (1/1) ... [2022-03-17 15:31:53,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39aaf0d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:31:53, skipping insertion in model container [2022-03-17 15:31:53,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:31:53" (1/1) ... [2022-03-17 15:31:53,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 15:31:53,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 15:31:53,733 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/mono-crafted_8.c[318,331] [2022-03-17 15:31:53,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:31:53,779 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 15:31:53,787 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/mono-crafted_8.c[318,331] [2022-03-17 15:31:53,788 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:31:53,796 INFO L208 MainTranslator]: Completed translation [2022-03-17 15:31:53,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:31:53 WrapperNode [2022-03-17 15:31:53,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 15:31:53,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 15:31:53,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 15:31:53,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 15:31:53,817 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:31:53" (1/1) ... [2022-03-17 15:31:53,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:31:53" (1/1) ... [2022-03-17 15:31:53,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:31:53" (1/1) ... [2022-03-17 15:31:53,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:31:53" (1/1) ... [2022-03-17 15:31:53,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:31:53" (1/1) ... [2022-03-17 15:31:53,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:31:53" (1/1) ... [2022-03-17 15:31:53,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:31:53" (1/1) ... [2022-03-17 15:31:53,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 15:31:53,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 15:31:53,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 15:31:53,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 15:31:53,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:31:53" (1/1) ... [2022-03-17 15:31:53,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:31:53,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:31:53,853 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 15:31:53,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 15:31:53,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 15:31:53,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 15:31:53,889 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 15:31:53,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 15:31:53,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 15:31:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 15:31:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 15:31:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 15:31:53,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 15:31:53,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 15:31:53,891 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 15:31:53,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 15:31:53,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 15:31:53,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 15:31:53,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 15:31:53,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 15:31:53,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 15:31:53,938 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 15:31:53,939 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 15:31:54,022 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 15:31:54,026 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 15:31:54,026 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 15:31:54,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:31:54 BoogieIcfgContainer [2022-03-17 15:31:54,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 15:31:54,028 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 15:31:54,028 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 15:31:54,029 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 15:31:54,031 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:31:54" (1/1) ... [2022-03-17 15:31:54,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:31:54 BasicIcfg [2022-03-17 15:31:54,040 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 15:31:54,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 15:31:54,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 15:31:54,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 15:31:54,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 03:31:53" (1/4) ... [2022-03-17 15:31:54,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37747cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:31:54, skipping insertion in model container [2022-03-17 15:31:54,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:31:53" (2/4) ... [2022-03-17 15:31:54,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37747cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:31:54, skipping insertion in model container [2022-03-17 15:31:54,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:31:54" (3/4) ... [2022-03-17 15:31:54,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37747cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:31:54, skipping insertion in model container [2022-03-17 15:31:54,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:31:54" (4/4) ... [2022-03-17 15:31:54,060 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.cJordan [2022-03-17 15:31:54,063 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 15:31:54,063 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 15:31:54,094 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 15:31:54,098 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 15:31:54,099 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 15:31:54,112 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 15:31:54,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 15:31:54,120 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:31:54,120 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:31:54,121 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:31:54,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:31:54,124 INFO L85 PathProgramCache]: Analyzing trace with hash 447419557, now seen corresponding path program 1 times [2022-03-17 15:31:54,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:31:54,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750724232] [2022-03-17 15:31:54,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:31:54,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:31:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:31:54,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:31:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:31:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:31:54,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:31:54,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750724232] [2022-03-17 15:31:54,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750724232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:31:54,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:31:54,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 15:31:54,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271587824] [2022-03-17 15:31:54,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:31:54,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 15:31:54,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:31:54,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 15:31:54,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:31:54,315 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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) [2022-03-17 15:31:54,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:31:54,345 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-03-17 15:31:54,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 15:31:54,346 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 [2022-03-17 15:31:54,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:31:54,352 INFO L225 Difference]: With dead ends: 21 [2022-03-17 15:31:54,352 INFO L226 Difference]: Without dead ends: 14 [2022-03-17 15:31:54,354 INFO L911 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 [2022-03-17 15:31:54,359 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 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 [2022-03-17 15:31:54,359 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:31:54,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-17 15:31:54,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-17 15:31:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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) [2022-03-17 15:31:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-17 15:31:54,380 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-03-17 15:31:54,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:31:54,380 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-17 15:31:54,381 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) [2022-03-17 15:31:54,381 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-17 15:31:54,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 15:31:54,382 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:31:54,382 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:31:54,382 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 15:31:54,383 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:31:54,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:31:54,385 INFO L85 PathProgramCache]: Analyzing trace with hash 448343078, now seen corresponding path program 1 times [2022-03-17 15:31:54,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:31:54,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325992339] [2022-03-17 15:31:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:31:54,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:31:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:31:54,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:31:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:31:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:31:54,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:31:54,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325992339] [2022-03-17 15:31:54,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325992339] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:31:54,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:31:54,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 15:31:54,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870726399] [2022-03-17 15:31:54,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:31:54,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 15:31:54,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:31:54,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 15:31:54,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 15:31:54,542 INFO L87 Difference]: Start difference. First operand 14 states and 15 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) [2022-03-17 15:31:54,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:31:54,586 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-03-17 15:31:54,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 15:31:54,586 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 [2022-03-17 15:31:54,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:31:54,587 INFO L225 Difference]: With dead ends: 17 [2022-03-17 15:31:54,587 INFO L226 Difference]: Without dead ends: 17 [2022-03-17 15:31:54,590 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 15:31:54,591 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:31:54,591 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:31:54,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-17 15:31:54,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-03-17 15:31:54,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2022-03-17 15:31:54,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-03-17 15:31:54,599 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-03-17 15:31:54,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:31:54,600 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-03-17 15:31:54,600 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) [2022-03-17 15:31:54,600 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-03-17 15:31:54,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-17 15:31:54,600 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:31:54,601 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:31:54,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 15:31:54,601 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:31:54,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:31:54,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1516694440, now seen corresponding path program 1 times [2022-03-17 15:31:54,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:31:54,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46559622] [2022-03-17 15:31:54,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:31:54,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:31:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:31:54,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:31:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:31:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:31:54,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:31:54,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46559622] [2022-03-17 15:31:54,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46559622] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:31:54,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183518522] [2022-03-17 15:31:54,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:31:54,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:31:54,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:31:54,739 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:31:54,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 15:31:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:31:54,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 15:31:54,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:31:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:31:54,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:31:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:31:54,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183518522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:31:54,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:31:54,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-03-17 15:31:54,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633296482] [2022-03-17 15:31:54,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:31:54,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 15:31:54,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:31:54,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 15:31:54,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-17 15:31:54,982 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-03-17 15:31:55,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:31:55,065 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2022-03-17 15:31:55,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-17 15:31:55,066 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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 14 [2022-03-17 15:31:55,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:31:55,066 INFO L225 Difference]: With dead ends: 24 [2022-03-17 15:31:55,066 INFO L226 Difference]: Without dead ends: 24 [2022-03-17 15:31:55,067 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-03-17 15:31:55,067 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:31:55,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 28 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:31:55,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-17 15:31:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-17 15:31:55,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2022-03-17 15:31:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-03-17 15:31:55,070 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2022-03-17 15:31:55,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:31:55,070 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-03-17 15:31:55,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 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) [2022-03-17 15:31:55,071 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-03-17 15:31:55,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 15:31:55,071 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:31:55,071 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:31:55,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 15:31:55,296 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 [2022-03-17 15:31:55,297 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:31:55,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:31:55,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1579293370, now seen corresponding path program 1 times [2022-03-17 15:31:55,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:31:55,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50046782] [2022-03-17 15:31:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:31:55,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:31:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:31:55,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:31:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:31:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 15:31:55,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:31:55,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50046782] [2022-03-17 15:31:55,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50046782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:31:55,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941199145] [2022-03-17 15:31:55,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:31:55,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:31:55,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:31:55,397 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:31:55,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 15:31:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:31:55,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-17 15:31:55,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:31:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 15:31:55,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:31:55,624 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 15:31:55,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941199145] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:31:55,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:31:55,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 11 [2022-03-17 15:31:55,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844822100] [2022-03-17 15:31:55,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:31:55,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 15:31:55,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:31:55,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 15:31:55,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-03-17 15:31:55,633 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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) [2022-03-17 15:31:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:31:55,798 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-03-17 15:31:55,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 15:31:55,798 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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 23 [2022-03-17 15:31:55,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:31:55,800 INFO L225 Difference]: With dead ends: 34 [2022-03-17 15:31:55,800 INFO L226 Difference]: Without dead ends: 34 [2022-03-17 15:31:55,800 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2022-03-17 15:31:55,801 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:31:55,801 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 33 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:31:55,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-17 15:31:55,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-03-17 15:31:55,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 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) [2022-03-17 15:31:55,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-03-17 15:31:55,804 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2022-03-17 15:31:55,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:31:55,805 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-03-17 15:31:55,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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) [2022-03-17 15:31:55,805 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-03-17 15:31:55,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-17 15:31:55,805 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:31:55,805 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:31:55,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 15:31:56,015 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 [2022-03-17 15:31:56,015 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:31:56,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:31:56,016 INFO L85 PathProgramCache]: Analyzing trace with hash -888303194, now seen corresponding path program 2 times [2022-03-17 15:31:56,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:31:56,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935390391] [2022-03-17 15:31:56,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:31:56,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:31:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:31:56,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:31:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:31:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:31:56,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:31:56,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935390391] [2022-03-17 15:31:56,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935390391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:31:56,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941701374] [2022-03-17 15:31:56,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 15:31:56,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:31:56,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:31:56,140 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:31:56,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-17 15:31:56,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 15:31:56,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:31:56,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 15:31:56,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:31:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:31:56,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:31:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:31:56,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941701374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:31:56,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:31:56,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2022-03-17 15:31:56,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518037763] [2022-03-17 15:31:56,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:31:56,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 15:31:56,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:31:56,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 15:31:56,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-03-17 15:31:56,416 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 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) [2022-03-17 15:31:56,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:31:56,821 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-03-17 15:31:56,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-17 15:31:56,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 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 23 [2022-03-17 15:31:56,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:31:56,822 INFO L225 Difference]: With dead ends: 42 [2022-03-17 15:31:56,822 INFO L226 Difference]: Without dead ends: 42 [2022-03-17 15:31:56,823 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=541, Unknown=0, NotChecked=0, Total=756 [2022-03-17 15:31:56,823 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:31:56,823 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 38 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:31:56,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-17 15:31:56,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-03-17 15:31:56,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 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) [2022-03-17 15:31:56,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-03-17 15:31:56,826 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2022-03-17 15:31:56,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:31:56,827 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-03-17 15:31:56,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 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) [2022-03-17 15:31:56,827 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-03-17 15:31:56,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-17 15:31:56,827 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:31:56,840 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:31:56,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-17 15:31:57,066 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 [2022-03-17 15:31:57,067 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:31:57,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:31:57,067 INFO L85 PathProgramCache]: Analyzing trace with hash -443899610, now seen corresponding path program 2 times [2022-03-17 15:31:57,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:31:57,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595618932] [2022-03-17 15:31:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:31:57,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:31:57,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:31:57,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:31:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:31:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 15:31:57,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:31:57,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595618932] [2022-03-17 15:31:57,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595618932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:31:57,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697848888] [2022-03-17 15:31:57,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 15:31:57,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:31:57,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:31:57,192 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:31:57,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-17 15:31:57,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 15:31:57,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:31:57,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 15:31:57,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:31:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 15:31:57,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:31:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 15:31:57,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697848888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:31:57,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:31:57,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-03-17 15:31:57,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484940642] [2022-03-17 15:31:57,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:31:57,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 15:31:57,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:31:57,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 15:31:57,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-03-17 15:31:57,485 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 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) [2022-03-17 15:31:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:31:59,114 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-03-17 15:31:59,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 15:31:59,114 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 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 41 [2022-03-17 15:31:59,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:31:59,115 INFO L225 Difference]: With dead ends: 60 [2022-03-17 15:31:59,115 INFO L226 Difference]: Without dead ends: 60 [2022-03-17 15:31:59,115 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2022-03-17 15:31:59,116 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 72 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:31:59,116 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 48 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:31:59,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-17 15:31:59,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-03-17 15:31:59,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.12) internal successors, (56), 50 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) [2022-03-17 15:31:59,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2022-03-17 15:31:59,120 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 41 [2022-03-17 15:31:59,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:31:59,120 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2022-03-17 15:31:59,120 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 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) [2022-03-17 15:31:59,120 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2022-03-17 15:31:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-17 15:31:59,121 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:31:59,121 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:31:59,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-17 15:31:59,337 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 [2022-03-17 15:31:59,337 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:31:59,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:31:59,337 INFO L85 PathProgramCache]: Analyzing trace with hash -556846618, now seen corresponding path program 3 times [2022-03-17 15:31:59,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:31:59,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162806185] [2022-03-17 15:31:59,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:31:59,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:31:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:31:59,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:31:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:31:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:31:59,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:31:59,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162806185] [2022-03-17 15:31:59,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162806185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:31:59,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373598083] [2022-03-17 15:31:59,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 15:31:59,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:31:59,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:31:59,650 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:31:59,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-17 15:31:59,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-17 15:31:59,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:31:59,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-17 15:31:59,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:31:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-17 15:31:59,820 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 15:31:59,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373598083] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:31:59,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-17 15:31:59,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2022-03-17 15:31:59,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572765113] [2022-03-17 15:31:59,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:31:59,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-17 15:31:59,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:31:59,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-17 15:31:59,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-03-17 15:31:59,821 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:31:59,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:31:59,853 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-03-17 15:31:59,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:31:59,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 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 41 [2022-03-17 15:31:59,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:31:59,854 INFO L225 Difference]: With dead ends: 60 [2022-03-17 15:31:59,854 INFO L226 Difference]: Without dead ends: 60 [2022-03-17 15:31:59,854 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-03-17 15:31:59,854 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:31:59,855 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 28 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:31:59,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-17 15:31:59,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-03-17 15:31:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 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) [2022-03-17 15:31:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-03-17 15:31:59,858 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 41 [2022-03-17 15:31:59,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:31:59,858 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-03-17 15:31:59,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:31:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-03-17 15:31:59,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-17 15:31:59,859 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:31:59,859 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:31:59,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 15:32:00,076 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 [2022-03-17 15:32:00,077 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:32:00,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:32:00,077 INFO L85 PathProgramCache]: Analyzing trace with hash -236436009, now seen corresponding path program 3 times [2022-03-17 15:32:00,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:32:00,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145560727] [2022-03-17 15:32:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:32:00,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:32:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:32:00,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:32:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:32:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 29 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:32:00,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:32:00,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145560727] [2022-03-17 15:32:00,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145560727] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:32:00,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558914931] [2022-03-17 15:32:00,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 15:32:00,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:32:00,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:32:00,320 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:32:00,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-17 15:32:00,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-17 15:32:00,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:32:00,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-17 15:32:00,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:32:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-03-17 15:32:00,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:32:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-03-17 15:32:00,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558914931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:32:00,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:32:00,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 26 [2022-03-17 15:32:00,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399615931] [2022-03-17 15:32:00,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:32:00,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-17 15:32:00,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:32:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-17 15:32:00,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-03-17 15:32:00,732 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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) [2022-03-17 15:32:01,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:32:01,835 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2022-03-17 15:32:01,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-17 15:32:01,836 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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 56 [2022-03-17 15:32:01,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:32:01,837 INFO L225 Difference]: With dead ends: 79 [2022-03-17 15:32:01,837 INFO L226 Difference]: Without dead ends: 79 [2022-03-17 15:32:01,838 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=547, Invalid=2003, Unknown=0, NotChecked=0, Total=2550 [2022-03-17 15:32:01,838 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 182 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 15:32:01,838 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 62 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 15:32:01,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-17 15:32:01,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2022-03-17 15:32:01,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 70 states have internal predecessors, (76), 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) [2022-03-17 15:32:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2022-03-17 15:32:01,842 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 56 [2022-03-17 15:32:01,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:32:01,842 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2022-03-17 15:32:01,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 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) [2022-03-17 15:32:01,842 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2022-03-17 15:32:01,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-17 15:32:01,843 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:32:01,843 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:32:01,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-17 15:32:02,059 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 [2022-03-17 15:32:02,059 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:32:02,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:32:02,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1430063529, now seen corresponding path program 4 times [2022-03-17 15:32:02,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:32:02,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775024259] [2022-03-17 15:32:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:32:02,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:32:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:32:02,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:32:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:32:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 233 proven. 392 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-17 15:32:02,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:32:02,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775024259] [2022-03-17 15:32:02,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775024259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:32:02,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809269986] [2022-03-17 15:32:02,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 15:32:02,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:32:02,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:32:02,332 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:32:02,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-17 15:32:02,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 15:32:02,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:32:02,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-17 15:32:02,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:32:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:32:02,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:32:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:32:03,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809269986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:32:03,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:32:03,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 24] total 47 [2022-03-17 15:32:03,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944452119] [2022-03-17 15:32:03,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:32:03,786 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-17 15:32:03,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:32:03,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-17 15:32:03,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1569, Unknown=0, NotChecked=0, Total=2162 [2022-03-17 15:32:03,787 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 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) [2022-03-17 15:33:17,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:33:18,000 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2022-03-17 15:33:18,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-17 15:33:18,000 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 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 74 [2022-03-17 15:33:18,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:33:18,002 INFO L225 Difference]: With dead ends: 153 [2022-03-17 15:33:18,002 INFO L226 Difference]: Without dead ends: 153 [2022-03-17 15:33:18,003 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 74.5s TimeCoverageRelationStatistics Valid=2121, Invalid=5710, Unknown=1, NotChecked=0, Total=7832 [2022-03-17 15:33:18,004 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 303 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-17 15:33:18,004 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 119 Invalid, 1464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1367 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-17 15:33:18,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-17 15:33:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-17 15:33:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0405405405405406) internal successors, (154), 148 states have internal predecessors, (154), 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) [2022-03-17 15:33:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2022-03-17 15:33:18,020 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 74 [2022-03-17 15:33:18,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:33:18,020 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2022-03-17 15:33:18,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 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) [2022-03-17 15:33:18,021 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2022-03-17 15:33:18,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-03-17 15:33:18,022 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:33:18,022 INFO L500 BasicCegarLoop]: trace histogram [47, 47, 42, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:33:18,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-17 15:33:18,249 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 [2022-03-17 15:33:18,250 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:33:18,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:33:18,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1642783383, now seen corresponding path program 5 times [2022-03-17 15:33:18,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:33:18,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616190679] [2022-03-17 15:33:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:33:18,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:33:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:33:19,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:33:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:33:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 597 proven. 2667 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-17 15:33:19,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:33:19,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616190679] [2022-03-17 15:33:19,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616190679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:33:19,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061347410] [2022-03-17 15:33:19,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 15:33:19,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:33:19,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:33:19,223 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 15:33:19,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-17 15:37:21,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2022-03-17 15:37:21,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:37:21,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-17 15:37:21,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:37:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 93 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:37:23,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:37:27,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 93 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:37:27,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061347410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:37:27,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:37:27,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 50, 50] total 142 [2022-03-17 15:37:27,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527719201] [2022-03-17 15:37:27,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:37:27,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-03-17 15:37:27,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:37:27,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-03-17 15:37:27,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4778, Invalid=15244, Unknown=0, NotChecked=0, Total=20022 [2022-03-17 15:37:27,587 INFO L87 Difference]: Start difference. First operand 153 states and 158 transitions. Second operand has 142 states, 142 states have (on average 2.964788732394366) internal successors, (421), 141 states have internal predecessors, (421), 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)