/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/Mono5_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 15:14:58,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 15:14:58,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 15:14:58,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 15:14:58,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 15:14:59,003 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 15:14:59,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 15:14:59,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 15:14:59,004 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 15:14:59,004 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 15:14:59,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 15:14:59,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 15:14:59,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 15:14:59,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 15:14:59,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 15:14:59,005 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 15:14:59,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 15:14:59,005 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 15:14:59,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 15:14:59,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 15:14:59,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 15:14:59,006 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 15:14:59,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 15:14:59,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:14:59,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 15:14:59,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 15:14:59,007 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 15:14:59,007 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 15:14:59,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 15:14:59,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 15:14:59,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 15:14:59,191 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 15:14:59,192 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 15:14:59,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2022-03-17 15:14:59,241 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baf9a812f/854e500ce74a4209b897883a3a55cc50/FLAG94952f23b [2022-03-17 15:14:59,538 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 15:14:59,538 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2022-03-17 15:14:59,559 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baf9a812f/854e500ce74a4209b897883a3a55cc50/FLAG94952f23b [2022-03-17 15:14:59,975 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/baf9a812f/854e500ce74a4209b897883a3a55cc50 [2022-03-17 15:14:59,976 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 15:14:59,977 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 15:14:59,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 15:14:59,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 15:14:59,981 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 15:14:59,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:14:59" (1/1) ... [2022-03-17 15:14:59,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74f32c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:14:59, skipping insertion in model container [2022-03-17 15:14:59,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:14:59" (1/1) ... [2022-03-17 15:14:59,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 15:14:59,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 15:15:00,099 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/Mono5_1.c[311,324] [2022-03-17 15:15:00,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:15:00,128 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 15:15:00,139 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/Mono5_1.c[311,324] [2022-03-17 15:15:00,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:15:00,149 INFO L208 MainTranslator]: Completed translation [2022-03-17 15:15:00,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:15:00 WrapperNode [2022-03-17 15:15:00,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 15:15:00,151 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 15:15:00,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 15:15:00,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 15:15:00,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:15:00" (1/1) ... [2022-03-17 15:15:00,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:15:00" (1/1) ... [2022-03-17 15:15:00,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:15:00" (1/1) ... [2022-03-17 15:15:00,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:15:00" (1/1) ... [2022-03-17 15:15:00,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:15:00" (1/1) ... [2022-03-17 15:15:00,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:15:00" (1/1) ... [2022-03-17 15:15:00,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:15:00" (1/1) ... [2022-03-17 15:15:00,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 15:15:00,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 15:15:00,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 15:15:00,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 15:15:00,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:15:00" (1/1) ... [2022-03-17 15:15:00,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:15:00,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:15:00,195 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 15:15:00,212 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 15:15:00,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 15:15:00,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 15:15:00,234 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 15:15:00,234 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 15:15:00,235 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 15:15:00,235 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 15:15:00,235 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 15:15:00,235 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 15:15:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 15:15:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 15:15:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 15:15:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 15:15:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 15:15:00,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 15:15:00,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 15:15:00,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 15:15:00,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 15:15:00,283 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 15:15:00,284 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 15:15:00,356 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 15:15:00,360 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 15:15:00,360 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 15:15:00,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:15:00 BoogieIcfgContainer [2022-03-17 15:15:00,362 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 15:15:00,362 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 15:15:00,362 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 15:15:00,363 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 15:15:00,369 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:15:00" (1/1) ... [2022-03-17 15:15:00,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:15:00 BasicIcfg [2022-03-17 15:15:00,378 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 15:15:00,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 15:15:00,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 15:15:00,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 15:15:00,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 03:14:59" (1/4) ... [2022-03-17 15:15:00,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd79366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:15:00, skipping insertion in model container [2022-03-17 15:15:00,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:15:00" (2/4) ... [2022-03-17 15:15:00,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd79366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:15:00, skipping insertion in model container [2022-03-17 15:15:00,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:15:00" (3/4) ... [2022-03-17 15:15:00,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd79366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:15:00, skipping insertion in model container [2022-03-17 15:15:00,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:15:00" (4/4) ... [2022-03-17 15:15:00,394 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono5_1.cJordan [2022-03-17 15:15:00,397 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 15:15:00,397 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 15:15:00,444 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 15:15:00,449 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 15:15:00,450 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 15:15:00,459 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-17 15:15:00,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 15:15:00,464 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:15:00,464 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:15:00,464 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:15:00,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:15:00,467 INFO L85 PathProgramCache]: Analyzing trace with hash -154368955, now seen corresponding path program 1 times [2022-03-17 15:15:00,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:15:00,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116690869] [2022-03-17 15:15:00,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:15:00,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:15:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:15:00,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:15:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:15:00,585 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 15:15:00,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:15:00,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116690869] [2022-03-17 15:15:00,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116690869] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:15:00,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:15:00,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 15:15:00,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660381899] [2022-03-17 15:15:00,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:15:00,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 15:15:00,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:15:00,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 15:15:00,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:15:00,608 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:15:00,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:15:00,634 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-03-17 15:15:00,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 15:15:00,637 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 15:15:00,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:15:00,644 INFO L225 Difference]: With dead ends: 20 [2022-03-17 15:15:00,645 INFO L226 Difference]: Without dead ends: 14 [2022-03-17 15:15:00,646 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 15:15:00,650 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:15:00,651 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:15:00,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-17 15:15:00,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-17 15:15:00,671 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 15:15:00,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-17 15:15:00,672 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-03-17 15:15:00,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:15:00,672 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-17 15:15:00,673 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 15:15:00,673 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-17 15:15:00,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 15:15:00,673 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:15:00,674 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:15:00,674 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 15:15:00,674 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:15:00,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:15:00,676 INFO L85 PathProgramCache]: Analyzing trace with hash -153445434, now seen corresponding path program 1 times [2022-03-17 15:15:00,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:15:00,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532439833] [2022-03-17 15:15:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:15:00,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:15:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:15:00,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:15:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:15:00,818 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 15:15:00,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:15:00,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532439833] [2022-03-17 15:15:00,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532439833] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:15:00,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:15:00,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-17 15:15:00,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231147443] [2022-03-17 15:15:00,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:15:00,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-17 15:15:00,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:15:00,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-17 15:15:00,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-17 15:15:00,823 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 15:15:00,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:15:00,896 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-03-17 15:15:00,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 15:15:00,897 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 15:15:00,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:15:00,898 INFO L225 Difference]: With dead ends: 20 [2022-03-17 15:15:00,898 INFO L226 Difference]: Without dead ends: 17 [2022-03-17 15:15:00,902 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-17 15:15:00,904 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:15:00,904 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:15:00,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-17 15:15:00,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-17 15:15:00,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 15:15:00,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-17 15:15:00,911 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-03-17 15:15:00,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:15:00,912 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-17 15:15:00,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 15:15:00,912 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-17 15:15:00,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-17 15:15:00,913 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:15:00,913 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:15:00,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 15:15:00,916 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:15:00,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:15:00,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1203653974, now seen corresponding path program 1 times [2022-03-17 15:15:00,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:15:00,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754502087] [2022-03-17 15:15:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:15:00,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:15:00,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:15:00,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:15:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:15:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:15:00,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:15:00,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754502087] [2022-03-17 15:15:00,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754502087] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:15:00,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:15:00,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 15:15:00,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109908418] [2022-03-17 15:15:00,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:15:00,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 15:15:00,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:15:00,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 15:15:00,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 15:15:01,000 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:15:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:15:01,028 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2022-03-17 15:15:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 15:15:01,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-17 15:15:01,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:15:01,029 INFO L225 Difference]: With dead ends: 20 [2022-03-17 15:15:01,029 INFO L226 Difference]: Without dead ends: 20 [2022-03-17 15:15:01,030 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 15:15:01,034 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:15:01,034 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 19 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:15:01,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-17 15:15:01,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-03-17 15:15:01,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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 15:15:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-03-17 15:15:01,036 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2022-03-17 15:15:01,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:15:01,037 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-03-17 15:15:01,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:15:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-03-17 15:15:01,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-17 15:15:01,037 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:15:01,037 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:15:01,037 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-17 15:15:01,037 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:15:01,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:15:01,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1828446949, now seen corresponding path program 1 times [2022-03-17 15:15:01,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:15:01,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221983290] [2022-03-17 15:15:01,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:15:01,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:15:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:15:01,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:15:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:15:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:15:01,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:15:01,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221983290] [2022-03-17 15:15:01,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221983290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:15:01,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451764744] [2022-03-17 15:15:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:15:01,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:15:01,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:15:01,116 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 15:15:01,117 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 15:15:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:15:01,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-17 15:15:01,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:15:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 15:15:01,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:15:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 15:15:01,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451764744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:15:01,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:15:01,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2022-03-17 15:15:01,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274209661] [2022-03-17 15:15:01,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:15:01,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-17 15:15:01,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:15:01,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-17 15:15:01,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-17 15:15:01,330 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:15:01,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:15:01,477 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-03-17 15:15:01,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-17 15:15:01,478 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-17 15:15:01,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:15:01,478 INFO L225 Difference]: With dead ends: 37 [2022-03-17 15:15:01,478 INFO L226 Difference]: Without dead ends: 32 [2022-03-17 15:15:01,479 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-03-17 15:15:01,479 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:15:01,480 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 50 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:15:01,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-17 15:15:01,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-03-17 15:15:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 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 15:15:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-03-17 15:15:01,483 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 17 [2022-03-17 15:15:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:15:01,483 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-03-17 15:15:01,483 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:15:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-03-17 15:15:01,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-17 15:15:01,484 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:15:01,484 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:15:01,510 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 15:15:01,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:15:01,704 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:15:01,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:15:01,704 INFO L85 PathProgramCache]: Analyzing trace with hash -976700890, now seen corresponding path program 2 times [2022-03-17 15:15:01,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:15:01,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590997154] [2022-03-17 15:15:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:15:01,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:15:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:15:01,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:15:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:15:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 15:15:01,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:15:01,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590997154] [2022-03-17 15:15:01,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590997154] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:15:01,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700185126] [2022-03-17 15:15:01,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 15:15:01,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:15:01,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:15:01,798 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 15:15:01,800 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 15:15:01,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 15:15:01,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:15:01,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-17 15:15:01,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:15:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 15:15:01,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:15:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 15:15:02,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700185126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:15:02,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:15:02,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 18 [2022-03-17 15:15:02,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972105392] [2022-03-17 15:15:02,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:15:02,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 15:15:02,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:15:02,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 15:15:02,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-17 15:15:02,169 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:15:02,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:15:02,717 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2022-03-17 15:15:02,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-17 15:15:02,717 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-17 15:15:02,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:15:02,718 INFO L225 Difference]: With dead ends: 61 [2022-03-17 15:15:02,718 INFO L226 Difference]: Without dead ends: 53 [2022-03-17 15:15:02,719 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2022-03-17 15:15:02,719 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:15:02,719 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 79 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 15:15:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-17 15:15:02,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-03-17 15:15:02,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 47 states have internal predecessors, (59), 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 15:15:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-03-17 15:15:02,723 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 29 [2022-03-17 15:15:02,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:15:02,723 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-03-17 15:15:02,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 16 states have internal predecessors, (53), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:15:02,724 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-03-17 15:15:02,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-17 15:15:02,727 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:15:02,727 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:15:02,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-17 15:15:02,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:15:02,950 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:15:02,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:15:02,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1868071817, now seen corresponding path program 3 times [2022-03-17 15:15:02,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:15:02,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158368801] [2022-03-17 15:15:02,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:15:02,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:15:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:15:03,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:15:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:15:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 106 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-17 15:15:03,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:15:03,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158368801] [2022-03-17 15:15:03,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158368801] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:15:03,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699075816] [2022-03-17 15:15:03,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 15:15:03,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:15:03,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:15:03,065 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 15:15:03,066 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 15:15:03,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-03-17 15:15:03,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:15:03,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 15:15:03,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:15:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 106 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-17 15:15:03,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:15:03,484 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 106 proven. 15 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-17 15:15:03,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699075816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:15:03,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:15:03,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-03-17 15:15:03,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686348316] [2022-03-17 15:15:03,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:15:03,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-17 15:15:03,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:15:03,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-17 15:15:03,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2022-03-17 15:15:03,486 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 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 15:15:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:15:04,181 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-03-17 15:15:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-17 15:15:04,182 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 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 50 [2022-03-17 15:15:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:15:04,182 INFO L225 Difference]: With dead ends: 77 [2022-03-17 15:15:04,182 INFO L226 Difference]: Without dead ends: 77 [2022-03-17 15:15:04,183 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=577, Unknown=0, NotChecked=0, Total=812 [2022-03-17 15:15:04,183 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:15:04,184 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 39 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:15:04,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-17 15:15:04,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2022-03-17 15:15:04,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 62 states have internal predecessors, (74), 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 15:15:04,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-03-17 15:15:04,188 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 50 [2022-03-17 15:15:04,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:15:04,188 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-03-17 15:15:04,188 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 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 15:15:04,188 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-03-17 15:15:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-17 15:15:04,189 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:15:04,189 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:15:04,205 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 15:15:04,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:15:04,395 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:15:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:15:04,395 INFO L85 PathProgramCache]: Analyzing trace with hash -31358138, now seen corresponding path program 4 times [2022-03-17 15:15:04,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:15:04,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137005715] [2022-03-17 15:15:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:15:04,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:15:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:15:04,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:15:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:15:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 251 proven. 100 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-17 15:15:04,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:15:04,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137005715] [2022-03-17 15:15:04,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137005715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:15:04,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449902767] [2022-03-17 15:15:04,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 15:15:04,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:15:04,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:15:04,561 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 15:15:04,562 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 15:15:04,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 15:15:04,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:15:04,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-17 15:15:04,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:15:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 377 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-17 15:15:04,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:15:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 377 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-17 15:15:05,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449902767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:15:05,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:15:05,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 36 [2022-03-17 15:15:05,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972923585] [2022-03-17 15:15:05,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:15:05,308 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-17 15:15:05,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:15:05,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-17 15:15:05,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2022-03-17 15:15:05,309 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 34 states have internal predecessors, (107), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:15:14,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:15:14,650 INFO L93 Difference]: Finished difference Result 121 states and 155 transitions. [2022-03-17 15:15:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-17 15:15:14,650 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 34 states have internal predecessors, (107), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-03-17 15:15:14,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:15:14,651 INFO L225 Difference]: With dead ends: 121 [2022-03-17 15:15:14,651 INFO L226 Difference]: Without dead ends: 107 [2022-03-17 15:15:14,653 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=916, Invalid=3776, Unknown=0, NotChecked=0, Total=4692 [2022-03-17 15:15:14,653 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 436 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:15:14,653 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 157 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-17 15:15:14,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-17 15:15:14,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-03-17 15:15:14,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.2376237623762376) internal successors, (125), 101 states have internal predecessors, (125), 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 15:15:14,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 129 transitions. [2022-03-17 15:15:14,666 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 129 transitions. Word has length 65 [2022-03-17 15:15:14,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:15:14,667 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 129 transitions. [2022-03-17 15:15:14,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 34 states have internal predecessors, (107), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:15:14,667 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 129 transitions. [2022-03-17 15:15:14,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-17 15:15:14,669 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:15:14,669 INFO L500 BasicCegarLoop]: trace histogram [31, 31, 22, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:15:14,687 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 15:15:14,869 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:15:14,869 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:15:14,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:15:14,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1862805289, now seen corresponding path program 5 times [2022-03-17 15:15:14,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:15:14,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005060163] [2022-03-17 15:15:14,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:15:14,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:15:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:15:15,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:15:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:15:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 628 proven. 126 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-03-17 15:15:15,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:15:15,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005060163] [2022-03-17 15:15:15,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005060163] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:15:15,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221530487] [2022-03-17 15:15:15,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 15:15:15,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:15:15,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:15:15,086 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 15:15:15,087 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 15:15:29,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2022-03-17 15:15:29,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:15:29,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-17 15:15:29,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:15:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1300 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-17 15:15:30,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:15:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1300 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-17 15:15:31,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221530487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:15:31,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:15:31,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 27, 27] total 61 [2022-03-17 15:15:31,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344625412] [2022-03-17 15:15:31,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:15:31,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-17 15:15:31,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:15:31,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-17 15:15:31,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=3003, Unknown=0, NotChecked=0, Total=3660 [2022-03-17 15:15:31,286 INFO L87 Difference]: Start difference. First operand 106 states and 129 transitions. Second operand has 61 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 59 states have internal predecessors, (182), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:16:52,668 WARN L232 SmtUtils]: Spent 37.74s on a formula simplification that was a NOOP. DAG size: 123 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 15:17:52,150 WARN L232 SmtUtils]: Spent 29.56s on a formula simplification that was a NOOP. DAG size: 118 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 15:18:45,240 WARN L232 SmtUtils]: Spent 31.93s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 15:19:35,848 WARN L232 SmtUtils]: Spent 25.43s on a formula simplification that was a NOOP. DAG size: 108 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 15:20:24,559 WARN L232 SmtUtils]: Spent 23.57s on a formula simplification that was a NOOP. DAG size: 103 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 15:21:02,127 WARN L232 SmtUtils]: Spent 17.94s on a formula simplification that was a NOOP. DAG size: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 15:21:33,943 WARN L232 SmtUtils]: Spent 13.51s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 15:22:01,912 WARN L232 SmtUtils]: Spent 12.53s on a formula simplification that was a NOOP. DAG size: 88 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 15:22:04,925 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (not (= 0 (mod (+ 4294967288 c_main_~z~0) 4294967296))) (not (= (mod (+ 4294967293 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967290 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967291 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967287 c_main_~z~0) 4294967296) 0)) (not (= (mod c_main_~z~0 4294967296) 0)) (not (= (mod (+ 4294967282 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967295 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967294 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967285 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967283 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967284 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967286 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967292 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967289 c_main_~z~0) 4294967296) 0)) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-17 15:22:26,229 WARN L232 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 15:22:57,186 WARN L232 SmtUtils]: Spent 10.60s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 15:23:28,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:23:28,603 INFO L93 Difference]: Finished difference Result 211 states and 281 transitions. [2022-03-17 15:23:28,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-17 15:23:28,603 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 59 states have internal predecessors, (182), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-03-17 15:23:28,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:23:28,605 INFO L225 Difference]: With dead ends: 211 [2022-03-17 15:23:28,605 INFO L226 Difference]: Without dead ends: 184 [2022-03-17 15:23:28,608 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 468.8s TimeCoverageRelationStatistics Valid=3045, Invalid=11213, Unknown=26, NotChecked=236, Total=14520 [2022-03-17 15:23:28,608 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 1259 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 3493 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1259 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 3610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-03-17 15:23:28,608 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1259 Valid, 231 Invalid, 3610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3493 Invalid, 0 Unknown, 4 Unchecked, 9.8s Time] [2022-03-17 15:23:28,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-03-17 15:23:28,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2022-03-17 15:23:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.2727272727272727) internal successors, (224), 176 states have internal predecessors, (224), 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 15:23:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 228 transitions. [2022-03-17 15:23:28,622 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 228 transitions. Word has length 104 [2022-03-17 15:23:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:23:28,622 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 228 transitions. [2022-03-17 15:23:28,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.9836065573770494) internal successors, (182), 59 states have internal predecessors, (182), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:23:28,622 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 228 transitions. [2022-03-17 15:23:28,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-17 15:23:28,623 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:23:28,623 INFO L500 BasicCegarLoop]: trace histogram [42, 42, 31, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:23:28,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-17 15:23:28,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:23:28,826 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:23:28,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:23:28,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1414296295, now seen corresponding path program 6 times [2022-03-17 15:23:28,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:23:28,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756279511] [2022-03-17 15:23:28,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:23:28,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:23:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:23:29,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:23:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:23:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 1013 proven. 155 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2022-03-17 15:23:29,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:23:29,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756279511] [2022-03-17 15:23:29,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756279511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:23:29,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315660955] [2022-03-17 15:23:29,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-17 15:23:29,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:23:29,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:23:29,086 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 15:23:29,087 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 15:23:29,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-17 15:23:29,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:23:29,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-17 15:23:29,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:23:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 97 proven. 27 refuted. 0 times theorem prover too weak. 2501 trivial. 0 not checked. [2022-03-17 15:23:29,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:23:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 1231 proven. 54 refuted. 0 times theorem prover too weak. 1340 trivial. 0 not checked. [2022-03-17 15:23:29,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315660955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:23:29,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:23:29,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 22 [2022-03-17 15:23:29,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739697261] [2022-03-17 15:23:29,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:23:29,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-17 15:23:29,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:23:29,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-17 15:23:29,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-03-17 15:23:29,716 INFO L87 Difference]: Start difference. First operand 181 states and 228 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 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 15:23:30,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:23:30,284 INFO L93 Difference]: Finished difference Result 585 states and 721 transitions. [2022-03-17 15:23:30,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-17 15:23:30,284 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 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 137 [2022-03-17 15:23:30,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:23:30,287 INFO L225 Difference]: With dead ends: 585 [2022-03-17 15:23:30,287 INFO L226 Difference]: Without dead ends: 585 [2022-03-17 15:23:30,288 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2022-03-17 15:23:30,288 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 107 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:23:30,288 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 42 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 15:23:30,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-03-17 15:23:30,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 186. [2022-03-17 15:23:30,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.2596685082872927) internal successors, (228), 181 states have internal predecessors, (228), 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 15:23:30,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 232 transitions. [2022-03-17 15:23:30,296 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 232 transitions. Word has length 137 [2022-03-17 15:23:30,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:23:30,296 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 232 transitions. [2022-03-17 15:23:30,296 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 21 states have internal predecessors, (67), 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 15:23:30,296 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 232 transitions. [2022-03-17 15:23:30,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-03-17 15:23:30,298 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:23:30,298 INFO L500 BasicCegarLoop]: trace histogram [47, 47, 34, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:23:30,314 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 15:23:30,498 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:23:30,499 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:23:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:23:30,499 INFO L85 PathProgramCache]: Analyzing trace with hash -225483019, now seen corresponding path program 7 times [2022-03-17 15:23:30,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:23:30,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953247203] [2022-03-17 15:23:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:23:30,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:23:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:23:30,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:23:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:23:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 1317 proven. 222 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2022-03-17 15:23:30,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:23:30,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953247203] [2022-03-17 15:23:30,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953247203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:23:30,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708094873] [2022-03-17 15:23:30,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-17 15:23:30,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:23:30,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:23:30,735 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 15:23:30,736 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 15:23:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:23:30,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-17 15:23:30,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:23:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3065 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-03-17 15:23:31,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:23:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3065 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-03-17 15:23:34,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708094873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:23:34,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:23:34,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 39, 39] total 88 [2022-03-17 15:23:34,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062444161] [2022-03-17 15:23:34,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:23:34,088 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-17 15:23:34,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:23:34,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-17 15:23:34,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1410, Invalid=6246, Unknown=0, NotChecked=0, Total=7656 [2022-03-17 15:23:34,090 INFO L87 Difference]: Start difference. First operand 186 states and 232 transitions. Second operand has 88 states, 88 states have (on average 3.022727272727273) internal successors, (266), 86 states have internal predecessors, (266), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:23:39,659 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (not (= (mod (+ 4294967267 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967271 c_main_~z~0) 4294967296) 0)) (not (= 0 (mod (+ 4294967288 c_main_~z~0) 4294967296))) (not (= (mod (+ 4294967293 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967276 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967263 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967275 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967277) 4294967296) 0)) (not (= (mod (+ 4294967290 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967264 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967280) 4294967296) 0)) (not (= (mod (+ 4294967270 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967291 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967262 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967287 c_main_~z~0) 4294967296) 0)) (not (= (mod c_main_~z~0 4294967296) 0)) (not (= (mod (+ 4294967282 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967295 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967269 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967279 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967294 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967285 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967268 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967278 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967283 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967281 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967266 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967284 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967286 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967272 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967292 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967289 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967273 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967274 c_main_~z~0) 4294967296) 0)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (not (= (mod (+ 4294967265 c_main_~z~0) 4294967296) 0))) is different from false [2022-03-17 15:23:41,690 WARN L833 $PredicateComparison]: unable to prove that (and (not (= (mod (+ 4294967267 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967271 c_main_~z~0) 4294967296) 0)) (not (= 0 (mod (+ 4294967288 c_main_~z~0) 4294967296))) (not (= (mod (+ 4294967293 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967276 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967263 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967275 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967277) 4294967296) 0)) (not (= (mod (+ 4294967290 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967264 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967280) 4294967296) 0)) (not (= (mod (+ 4294967270 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967291 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967262 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967287 c_main_~z~0) 4294967296) 0)) (not (= (mod c_main_~z~0 4294967296) 0)) (not (= (mod (+ 4294967282 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967295 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967269 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967279 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967294 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967285 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967268 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967278 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967283 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967281 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967266 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967284 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967286 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967272 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967292 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967289 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967273 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967274 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967265 c_main_~z~0) 4294967296) 0))) is different from false [2022-03-17 15:23:43,707 WARN L833 $PredicateComparison]: unable to prove that (and (not (= (mod (+ 4294967267 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967271 c_main_~z~0) 4294967296) 0)) (not (= 0 (mod (+ 4294967288 c_main_~z~0) 4294967296))) (not (= (mod (+ 4294967293 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967276 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967263 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967275 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967277) 4294967296) 0)) (not (= (mod (+ 4294967290 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967264 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967280) 4294967296) 0)) (not (= (mod (+ 4294967270 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967291 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967262 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967287 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967282 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967295 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967269 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967279 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967294 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967285 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967268 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967278 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967283 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967281 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967266 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967284 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967286 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967272 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967292 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967289 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967273 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967274 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967265 c_main_~z~0) 4294967296) 0))) is different from false [2022-03-17 15:26:25,210 WARN L232 SmtUtils]: Spent 1.54m on a formula simplification that was a NOOP. DAG size: 172 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 15:29:04,002 WARN L232 SmtUtils]: Spent 1.51m on a formula simplification that was a NOOP. DAG size: 178 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 15:29:05,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:29:06,331 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:29:08,749 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (not (= (mod (+ 4294967267 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967271 c_main_~z~0) 4294967296) 0)) (not (= 0 (mod (+ 4294967288 c_main_~z~0) 4294967296))) (not (= (mod (+ 4294967293 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967276 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967275 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967277) 4294967296) 0)) (not (= (mod (+ 4294967290 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967264 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967280) 4294967296) 0)) (not (= (mod (+ 4294967270 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967291 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967287 c_main_~z~0) 4294967296) 0)) (not (= (mod c_main_~z~0 4294967296) 0)) (not (= (mod (+ 4294967282 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967295 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967269 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967279 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967294 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967285 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967268 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967278 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967283 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967281 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967266 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967284 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967286 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967272 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967292 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967289 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967273 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967274 c_main_~z~0) 4294967296) 0)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (not (= (mod (+ 4294967265 c_main_~z~0) 4294967296) 0))) is different from false [2022-03-17 15:29:13,151 WARN L833 $PredicateComparison]: unable to prove that (and (not (= (mod (+ 4294967267 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967271 c_main_~z~0) 4294967296) 0)) (not (= 0 (mod (+ 4294967288 c_main_~z~0) 4294967296))) (not (= (mod (+ 4294967293 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967276 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967275 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967277) 4294967296) 0)) (not (= (mod (+ 4294967290 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967264 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ c_main_~z~0 4294967280) 4294967296) 0)) (not (= (mod (+ 4294967270 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967291 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967287 c_main_~z~0) 4294967296) 0)) (not (= (mod c_main_~z~0 4294967296) 0)) (not (= (mod (+ 4294967282 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967295 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967269 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967279 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967294 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967285 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967268 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967278 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967283 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967281 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967266 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967284 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967286 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967272 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967292 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967289 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967273 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967274 c_main_~z~0) 4294967296) 0)) (not (= (mod (+ 4294967265 c_main_~z~0) 4294967296) 0))) is different from false