/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/Mono3_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 15:12:41,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 15:12:41,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 15:12:41,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-17 15:12:41,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 15:12:41,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 15:12:41,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 15:12:41,448 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 15:12:41,453 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 15:12:41,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 15:12:41,454 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 15:12:41,454 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 15:12:41,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 15:12:41,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 15:12:41,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 15:12:41,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 15:12:41,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 15:12:41,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 15:12:41,455 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 15:12:41,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 15:12:41,455 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 15:12:41,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 15:12:41,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 15:12:41,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 15:12:41,456 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 15:12:41,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 15:12:41,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:12:41,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 15:12:41,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 15:12:41,456 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 15:12:41,457 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 15:12:41,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 15:12:41,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 15:12:41,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 15:12:41,643 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 15:12:41,643 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 15:12:41,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono3_1.c [2022-03-17 15:12:41,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bd8b0689/229a8c3d47384adca3cce917e57a0d62/FLAGf7c63b17d [2022-03-17 15:12:42,029 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 15:12:42,030 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono3_1.c [2022-03-17 15:12:42,033 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bd8b0689/229a8c3d47384adca3cce917e57a0d62/FLAGf7c63b17d [2022-03-17 15:12:42,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bd8b0689/229a8c3d47384adca3cce917e57a0d62 [2022-03-17 15:12:42,046 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 15:12:42,047 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 15:12:42,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 15:12:42,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 15:12:42,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 15:12:42,052 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:12:42" (1/1) ... [2022-03-17 15:12:42,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4beb1106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:12:42, skipping insertion in model container [2022-03-17 15:12:42,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:12:42" (1/1) ... [2022-03-17 15:12:42,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 15:12:42,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 15:12:42,176 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/Mono3_1.c[311,324] [2022-03-17 15:12:42,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:12:42,218 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 15:12:42,231 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/Mono3_1.c[311,324] [2022-03-17 15:12:42,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 15:12:42,248 INFO L208 MainTranslator]: Completed translation [2022-03-17 15:12:42,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:12:42 WrapperNode [2022-03-17 15:12:42,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 15:12:42,250 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 15:12:42,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 15:12:42,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 15:12:42,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:12:42" (1/1) ... [2022-03-17 15:12:42,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:12:42" (1/1) ... [2022-03-17 15:12:42,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:12:42" (1/1) ... [2022-03-17 15:12:42,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:12:42" (1/1) ... [2022-03-17 15:12:42,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:12:42" (1/1) ... [2022-03-17 15:12:42,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:12:42" (1/1) ... [2022-03-17 15:12:42,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:12:42" (1/1) ... [2022-03-17 15:12:42,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 15:12:42,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 15:12:42,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 15:12:42,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 15:12:42,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:12:42" (1/1) ... [2022-03-17 15:12:42,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 15:12:42,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:12:42,315 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 15:12:42,317 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 15:12:42,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 15:12:42,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 15:12:42,337 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 15:12:42,338 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 15:12:42,338 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 15:12:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 15:12:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 15:12:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 15:12:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 15:12:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 15:12:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 15:12:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 15:12:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 15:12:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 15:12:42,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 15:12:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 15:12:42,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 15:12:42,384 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 15:12:42,385 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 15:12:42,455 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 15:12:42,459 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 15:12:42,459 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 15:12:42,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:12:42 BoogieIcfgContainer [2022-03-17 15:12:42,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 15:12:42,461 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 15:12:42,461 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 15:12:42,462 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 15:12:42,464 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:12:42" (1/1) ... [2022-03-17 15:12:42,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:12:42 BasicIcfg [2022-03-17 15:12:42,474 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 15:12:42,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 15:12:42,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 15:12:42,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 15:12:42,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 03:12:42" (1/4) ... [2022-03-17 15:12:42,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131852f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:12:42, skipping insertion in model container [2022-03-17 15:12:42,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:12:42" (2/4) ... [2022-03-17 15:12:42,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131852f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:12:42, skipping insertion in model container [2022-03-17 15:12:42,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 03:12:42" (3/4) ... [2022-03-17 15:12:42,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@131852f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 03:12:42, skipping insertion in model container [2022-03-17 15:12:42,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 03:12:42" (4/4) ... [2022-03-17 15:12:42,479 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono3_1.cJordan [2022-03-17 15:12:42,482 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 15:12:42,495 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 15:12:42,543 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 15:12:42,566 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 15:12:42,567 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 15:12:42,575 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 15:12:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 15:12:42,580 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:12:42,580 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:12:42,581 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:12:42,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:12:42,586 INFO L85 PathProgramCache]: Analyzing trace with hash -154368955, now seen corresponding path program 1 times [2022-03-17 15:12:42,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:12:42,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791595251] [2022-03-17 15:12:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:12:42,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:12:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:12:42,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:12:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:12:42,736 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 15:12:42,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:12:42,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791595251] [2022-03-17 15:12:42,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791595251] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:12:42,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:12:42,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 15:12:42,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322568086] [2022-03-17 15:12:42,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:12:42,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 15:12:42,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:12:42,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 15:12:42,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 15:12:42,784 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 15:12:42,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:12:42,812 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-03-17 15:12:42,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 15:12:42,814 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 15:12:42,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:12:42,821 INFO L225 Difference]: With dead ends: 20 [2022-03-17 15:12:42,821 INFO L226 Difference]: Without dead ends: 14 [2022-03-17 15:12:42,822 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 15:12:42,825 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 15:12:42,825 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 15:12:42,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-17 15:12:42,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-17 15:12:42,844 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 15:12:42,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-03-17 15:12:42,846 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-03-17 15:12:42,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:12:42,846 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-03-17 15:12:42,846 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 15:12:42,846 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-03-17 15:12:42,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-17 15:12:42,846 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:12:42,847 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:12:42,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 15:12:42,847 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:12:42,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:12:42,848 INFO L85 PathProgramCache]: Analyzing trace with hash -153445434, now seen corresponding path program 1 times [2022-03-17 15:12:42,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:12:42,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261350157] [2022-03-17 15:12:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:12:42,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:12:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:12:42,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:12:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:12:42,913 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 15:12:42,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:12:42,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261350157] [2022-03-17 15:12:42,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261350157] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 15:12:42,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 15:12:42,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-17 15:12:42,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652424711] [2022-03-17 15:12:42,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 15:12:42,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-17 15:12:42,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:12:42,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-17 15:12:42,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-17 15:12:42,916 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:12:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:12:42,960 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-03-17 15:12:42,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-17 15:12:42,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-17 15:12:42,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:12:42,961 INFO L225 Difference]: With dead ends: 17 [2022-03-17 15:12:42,961 INFO L226 Difference]: Without dead ends: 17 [2022-03-17 15:12:42,961 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-17 15:12:42,962 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 15:12:42,962 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 15:12:42,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-17 15:12:42,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-03-17 15:12:42,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:12:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-03-17 15:12:42,966 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-03-17 15:12:42,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:12:42,967 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-03-17 15:12:42,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:12:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-03-17 15:12:42,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-17 15:12:42,967 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:12:42,967 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:12:42,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-17 15:12:42,968 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:12:42,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:12:42,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1203653974, now seen corresponding path program 1 times [2022-03-17 15:12:42,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:12:42,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413136807] [2022-03-17 15:12:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:12:42,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:12:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:12:43,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:12:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:12:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:12:43,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:12:43,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413136807] [2022-03-17 15:12:43,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413136807] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:12:43,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123587444] [2022-03-17 15:12:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:12:43,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:12:43,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:12:43,083 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 15:12:43,110 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 15:12:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:12:43,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-17 15:12:43,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:12:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:12:43,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:12:43,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:12:43,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123587444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:12:43,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:12:43,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 14 [2022-03-17 15:12:43,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157183465] [2022-03-17 15:12:43,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:12:43,404 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 15:12:43,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:12:43,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 15:12:43,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-03-17 15:12:43,406 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:12:43,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:12:43,704 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-03-17 15:12:43,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-17 15:12:43,704 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (5), 4 states have call predecessors, (5), 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 15:12:43,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:12:43,705 INFO L225 Difference]: With dead ends: 29 [2022-03-17 15:12:43,705 INFO L226 Difference]: Without dead ends: 25 [2022-03-17 15:12:43,705 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2022-03-17 15:12:43,706 INFO L912 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:12:43,706 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 41 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:12:43,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-17 15:12:43,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-03-17 15:12:43,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:12:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-03-17 15:12:43,709 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2022-03-17 15:12:43,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:12:43,709 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-03-17 15:12:43,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-17 15:12:43,710 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-03-17 15:12:43,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-17 15:12:43,710 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:12:43,710 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:12:43,729 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 15:12:43,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:12:43,923 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:12:43,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:12:43,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2025124503, now seen corresponding path program 1 times [2022-03-17 15:12:43,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:12:43,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641718406] [2022-03-17 15:12:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:12:43,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:12:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:12:44,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:12:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:12:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-17 15:12:44,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:12:44,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641718406] [2022-03-17 15:12:44,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641718406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:12:44,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988321293] [2022-03-17 15:12:44,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:12:44,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:12:44,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:12:44,045 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 15:12:44,046 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 15:12:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:12:44,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-17 15:12:44,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:12:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 15:12:44,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:12:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 15:12:44,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988321293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:12:44,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:12:44,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-17 15:12:44,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744126469] [2022-03-17 15:12:44,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:12:44,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-17 15:12:44,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:12:44,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-17 15:12:44,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-17 15:12:44,256 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 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 15:12:44,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:12:44,522 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-03-17 15:12:44,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-17 15:12:44,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 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 20 [2022-03-17 15:12:44,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:12:44,524 INFO L225 Difference]: With dead ends: 49 [2022-03-17 15:12:44,524 INFO L226 Difference]: Without dead ends: 45 [2022-03-17 15:12:44,525 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2022-03-17 15:12:44,525 INFO L912 BasicCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:12:44,526 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 52 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:12:44,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-17 15:12:44,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-03-17 15:12:44,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 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 15:12:44,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-03-17 15:12:44,533 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 20 [2022-03-17 15:12:44,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:12:44,533 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-03-17 15:12:44,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 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 15:12:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-03-17 15:12:44,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-17 15:12:44,534 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:12:44,534 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:12:44,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 15:12:44,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-17 15:12:44,743 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:12:44,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:12:44,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1905741238, now seen corresponding path program 2 times [2022-03-17 15:12:44,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:12:44,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641465286] [2022-03-17 15:12:44,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:12:44,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:12:44,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:12:44,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:12:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:12:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-17 15:12:44,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:12:44,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641465286] [2022-03-17 15:12:44,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641465286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:12:44,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329800130] [2022-03-17 15:12:44,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-17 15:12:44,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:12:44,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:12:44,855 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 15:12:44,856 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 15:12:44,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-17 15:12:44,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:12:44,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-17 15:12:44,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:12:44,991 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 15:12:44,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:12:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-17 15:12:45,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329800130] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:12:45,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:12:45,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2022-03-17 15:12:45,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192263469] [2022-03-17 15:12:45,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:12:45,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-17 15:12:45,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:12:45,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-17 15:12:45,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-17 15:12:45,136 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 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 15:12:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:12:45,573 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2022-03-17 15:12:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-17 15:12:45,574 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 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 26 [2022-03-17 15:12:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:12:45,575 INFO L225 Difference]: With dead ends: 85 [2022-03-17 15:12:45,575 INFO L226 Difference]: Without dead ends: 80 [2022-03-17 15:12:45,575 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=1071, Unknown=0, NotChecked=0, Total=1332 [2022-03-17 15:12:45,576 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 15:12:45,576 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 69 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 15:12:45,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-17 15:12:45,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2022-03-17 15:12:45,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 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 15:12:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2022-03-17 15:12:45,580 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 26 [2022-03-17 15:12:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:12:45,580 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2022-03-17 15:12:45,580 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 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 15:12:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2022-03-17 15:12:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-17 15:12:45,581 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:12:45,581 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:12:45,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-17 15:12:45,798 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:12:45,799 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:12:45,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:12:45,799 INFO L85 PathProgramCache]: Analyzing trace with hash 81509943, now seen corresponding path program 3 times [2022-03-17 15:12:45,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:12:45,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019641977] [2022-03-17 15:12:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:12:45,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:12:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:12:45,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:12:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:12:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 15:12:45,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:12:45,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019641977] [2022-03-17 15:12:45,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019641977] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:12:45,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212650999] [2022-03-17 15:12:45,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-17 15:12:45,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:12:45,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:12:45,944 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 15:12:45,946 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 15:12:46,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-17 15:12:46,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:12:46,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 15:12:46,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:12:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 15:12:46,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:12:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-17 15:12:46,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212650999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:12:46,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:12:46,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-03-17 15:12:46,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534787712] [2022-03-17 15:12:46,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:12:46,236 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 15:12:46,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:12:46,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 15:12:46,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-03-17 15:12:46,237 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 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 15:12:47,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:12:47,850 INFO L93 Difference]: Finished difference Result 109 states and 135 transitions. [2022-03-17 15:12:47,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-17 15:12:47,851 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 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 32 [2022-03-17 15:12:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:12:47,852 INFO L225 Difference]: With dead ends: 109 [2022-03-17 15:12:47,852 INFO L226 Difference]: Without dead ends: 109 [2022-03-17 15:12:47,853 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=477, Invalid=1083, Unknown=0, NotChecked=0, Total=1560 [2022-03-17 15:12:47,853 INFO L912 BasicCegarLoop]: 11 mSDtfsCounter, 127 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-17 15:12:47,854 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 58 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-17 15:12:47,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-17 15:12:47,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 57. [2022-03-17 15:12:47,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 52 states have internal predecessors, (62), 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 15:12:47,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-03-17 15:12:47,860 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 32 [2022-03-17 15:12:47,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:12:47,860 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-03-17 15:12:47,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 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 15:12:47,861 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-03-17 15:12:47,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-17 15:12:47,861 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:12:47,861 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:12:47,867 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 15:12:48,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:12:48,062 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:12:48,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:12:48,063 INFO L85 PathProgramCache]: Analyzing trace with hash -912098025, now seen corresponding path program 4 times [2022-03-17 15:12:48,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:12:48,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812457794] [2022-03-17 15:12:48,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:12:48,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:12:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:12:48,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:12:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:12:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 173 proven. 57 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-17 15:12:48,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:12:48,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812457794] [2022-03-17 15:12:48,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812457794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:12:48,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124570378] [2022-03-17 15:12:48,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-17 15:12:48,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:12:48,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:12:48,201 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 15:12:48,202 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 15:12:48,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-17 15:12:48,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:12:48,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-17 15:12:48,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:12:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 101 proven. 222 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 15:12:48,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:12:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 101 proven. 222 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-03-17 15:12:49,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124570378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:12:49,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:12:49,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 16] total 31 [2022-03-17 15:12:49,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447782315] [2022-03-17 15:12:49,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:12:49,007 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-17 15:12:49,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:12:49,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-17 15:12:49,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=667, Unknown=0, NotChecked=0, Total=930 [2022-03-17 15:12:49,008 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 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 15:13:00,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 15:13:00,230 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2022-03-17 15:13:00,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-17 15:13:00,230 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-03-17 15:13:00,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 15:13:00,231 INFO L225 Difference]: With dead ends: 117 [2022-03-17 15:13:00,231 INFO L226 Difference]: Without dead ends: 117 [2022-03-17 15:13:00,232 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=924, Invalid=2382, Unknown=0, NotChecked=0, Total=3306 [2022-03-17 15:13:00,232 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 255 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-17 15:13:00,233 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 79 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-17 15:13:00,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-17 15:13:00,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-03-17 15:13:00,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0892857142857142) internal successors, (122), 112 states have internal predecessors, (122), 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 15:13:00,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2022-03-17 15:13:00,238 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 56 [2022-03-17 15:13:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 15:13:00,238 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2022-03-17 15:13:00,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 states have internal predecessors, (91), 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 15:13:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2022-03-17 15:13:00,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-17 15:13:00,240 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 15:13:00,240 INFO L500 BasicCegarLoop]: trace histogram [35, 35, 26, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 15:13:00,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-17 15:13:00,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:13:00,441 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 15:13:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 15:13:00,442 INFO L85 PathProgramCache]: Analyzing trace with hash -2051530473, now seen corresponding path program 5 times [2022-03-17 15:13:00,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 15:13:00,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166384617] [2022-03-17 15:13:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 15:13:00,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 15:13:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:13:00,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 15:13:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 15:13:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 693 proven. 1027 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-03-17 15:13:01,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 15:13:01,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166384617] [2022-03-17 15:13:01,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166384617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-17 15:13:01,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181947366] [2022-03-17 15:13:01,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-17 15:13:01,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 15:13:01,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 15:13:01,016 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 15:13:01,040 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 15:13:08,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2022-03-17 15:13:08,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-17 15:13:08,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-17 15:13:08,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 15:13:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1794 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-17 15:13:10,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 15:13:11,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 0 proven. 1794 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-03-17 15:13:11,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181947366] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 15:13:11,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-17 15:13:11,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32, 32] total 88 [2022-03-17 15:13:11,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918947510] [2022-03-17 15:13:11,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-17 15:13:11,994 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-17 15:13:11,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 15:13:11,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-17 15:13:11,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=972, Invalid=6684, Unknown=0, NotChecked=0, Total=7656 [2022-03-17 15:13:11,998 INFO L87 Difference]: Start difference. First operand 117 states and 126 transitions. Second operand has 88 states, 88 states have (on average 3.102272727272727) internal successors, (273), 86 states have internal predecessors, (273), 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 15:13:16,066 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (not (= (mod (+ 9 c_main_~y~0) 4294967296) 0)))) (and (= |c_#NULL.base| |c_old(#NULL.base)|) (not (= (mod (+ 16 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 6 c_main_~y~0) 4294967296) 0)) (not (<= (+ (div c_main_~x~0 4294967296) 1) 0)) (not (= (mod (+ 4294967288 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 14 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 8 c_main_~y~0) 4294967296) 0)) (not (= (mod c_main_~y~0 4294967296) 0)) (not (= (mod (+ 4294967295 c_main_~y~0) 4294967296) 0)) (or .cse0 (not (< (mod c_main_~x~0 4294967296) 500000))) (not (= (mod (+ 11 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 13 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 12 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 15 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 4294967287 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 4294967292 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 4294967294 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 7 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 2 c_main_~y~0) 4294967296) 0)) (or (not (< (mod (+ c_main_~x~0 1) 4294967296) 500000)) .cse0) (not (= (mod (+ 4294967290 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 5 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ c_main_~y~0 1) 4294967296) 0)) (not (= (mod (+ 4 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 3 c_main_~y~0) 4294967296) 0)) (not (= 0 (mod (+ 17 c_main_~y~0) 4294967296))) (not (= (mod (+ 4294967291 c_main_~y~0) 4294967296) 0)) (<= c_main_~x~0 26) (not (= (mod (+ 4294967289 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ c_main_~y~0 4294967293) 4294967296) 0)) (not (= (mod (+ 10 c_main_~y~0) 4294967296) 0)) (= |c_#NULL.offset| |c_old(#NULL.offset)|))) is different from false [2022-03-17 15:15:33,848 WARN L232 SmtUtils]: Spent 59.36s on a formula simplification that was a NOOP. DAG size: 138 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 15:15:35,117 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:17:48,599 WARN L232 SmtUtils]: Spent 1.02m on a formula simplification that was a NOOP. DAG size: 149 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 15:20:06,460 WARN L232 SmtUtils]: Spent 1.08m on a formula simplification that was a NOOP. DAG size: 144 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 15:20:10,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:20:13,325 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:20:15,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:20:17,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:20:19,472 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:20:20,559 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:20:23,267 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:20:26,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:20:27,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:20:30,584 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:22:17,217 WARN L232 SmtUtils]: Spent 43.86s on a formula simplification that was a NOOP. DAG size: 144 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 15:22:21,461 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_#NULL.base| |c_old(#NULL.base)|) (not (= (mod (+ 6 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 4294967288 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 14 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 8 c_main_~y~0) 4294967296) 0)) (not (= (mod c_main_~y~0 4294967296) 0)) (not (= (mod (+ 4294967295 c_main_~y~0) 4294967296) 0)) (or (not (= (mod (+ 9 c_main_~y~0) 4294967296) 0)) (not (< (mod c_main_~x~0 4294967296) 500000))) (not (= (mod (+ 11 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 13 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 12 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 15 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 4294967287 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 4294967292 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 4294967294 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 7 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 2 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 4294967290 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 5 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ c_main_~y~0 1) 4294967296) 0)) (not (= (mod (+ 4 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 3 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 4294967291 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ 4294967289 c_main_~y~0) 4294967296) 0)) (not (= (mod (+ c_main_~y~0 4294967293) 4294967296) 0)) (not (= (mod (+ 10 c_main_~y~0) 4294967296) 0)) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2022-03-17 15:22:24,410 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-03-17 15:24:09,292 WARN L232 SmtUtils]: Spent 46.03s on a formula simplification that was a NOOP. DAG size: 139 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-17 15:26:18,703 WARN L232 SmtUtils]: Spent 50.73s on a formula simplification that was a NOOP. DAG size: 133 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)