/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 03:40:50,125 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 03:40:50,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 03:40:50,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 03:40:50,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 03:40:50,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 03:40:50,219 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 03:40:50,220 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 03:40:50,227 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 03:40:50,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 03:40:50,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 03:40:50,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 03:40:50,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 03:40:50,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 03:40:50,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 03:40:50,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 03:40:50,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 03:40:50,230 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 03:40:50,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 03:40:50,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 03:40:50,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 03:40:50,230 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 03:40:50,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 03:40:50,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 03:40:50,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 03:40:50,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 03:40:50,231 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 03:40:50,232 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 03:40:50,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 03:40:50,232 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 03:40:50,232 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 03:40:50,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 03:40:50,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 03:40:50,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 03:40:50,498 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 03:40:50,500 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 03:40:50,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound5.c [2022-03-18 03:40:50,555 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb39774e1/e44b868e1df94288901f0e3405645c0f/FLAG12b299fd3 [2022-03-18 03:40:50,932 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 03:40:50,932 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound5.c [2022-03-18 03:40:50,939 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb39774e1/e44b868e1df94288901f0e3405645c0f/FLAG12b299fd3 [2022-03-18 03:40:51,341 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb39774e1/e44b868e1df94288901f0e3405645c0f [2022-03-18 03:40:51,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 03:40:51,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 03:40:51,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 03:40:51,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 03:40:51,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 03:40:51,350 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 03:40:51" (1/1) ... [2022-03-18 03:40:51,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@376c8f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:51, skipping insertion in model container [2022-03-18 03:40:51,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 03:40:51" (1/1) ... [2022-03-18 03:40:51,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 03:40:51,375 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 03:40:51,512 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound5.c[526,539] [2022-03-18 03:40:51,536 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 03:40:51,543 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 03:40:51,558 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound5.c[526,539] [2022-03-18 03:40:51,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 03:40:51,584 INFO L208 MainTranslator]: Completed translation [2022-03-18 03:40:51,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:51 WrapperNode [2022-03-18 03:40:51,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 03:40:51,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 03:40:51,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 03:40:51,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 03:40:51,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:51" (1/1) ... [2022-03-18 03:40:51,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:51" (1/1) ... [2022-03-18 03:40:51,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:51" (1/1) ... [2022-03-18 03:40:51,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:51" (1/1) ... [2022-03-18 03:40:51,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:51" (1/1) ... [2022-03-18 03:40:51,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:51" (1/1) ... [2022-03-18 03:40:51,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:51" (1/1) ... [2022-03-18 03:40:51,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 03:40:51,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 03:40:51,628 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 03:40:51,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 03:40:51,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:51" (1/1) ... [2022-03-18 03:40:51,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 03:40:51,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:40:51,656 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) [2022-03-18 03:40:51,686 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 [2022-03-18 03:40:51,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 03:40:51,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 03:40:51,702 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 03:40:51,702 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 03:40:51,703 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 03:40:51,703 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 03:40:51,703 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 03:40:51,703 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 03:40:51,703 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 03:40:51,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 03:40:51,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 03:40:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 03:40:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 03:40:51,704 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 03:40:51,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 03:40:51,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 03:40:51,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 03:40:51,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 03:40:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 03:40:51,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 03:40:51,769 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 03:40:51,770 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 03:40:51,956 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 03:40:51,961 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 03:40:51,962 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-18 03:40:51,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 03:40:51 BoogieIcfgContainer [2022-03-18 03:40:51,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 03:40:51,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 03:40:51,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 03:40:51,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 03:40:51,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 03:40:51" (1/3) ... [2022-03-18 03:40:51,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424d432e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 03:40:51, skipping insertion in model container [2022-03-18 03:40:51,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 03:40:51" (2/3) ... [2022-03-18 03:40:51,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424d432e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 03:40:51, skipping insertion in model container [2022-03-18 03:40:51,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 03:40:51" (3/3) ... [2022-03-18 03:40:51,979 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound5.c [2022-03-18 03:40:51,983 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 03:40:51,983 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 03:40:52,029 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 03:40:52,040 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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 [2022-03-18 03:40:52,040 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 03:40:52,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 03:40:52,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 03:40:52,074 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:52,074 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:52,075 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:52,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:52,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 1 times [2022-03-18 03:40:52,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:52,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [965946323] [2022-03-18 03:40:52,095 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:40:52,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 2 times [2022-03-18 03:40:52,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:40:52,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664888079] [2022-03-18 03:40:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:52,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:40:52,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:52,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:40:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:40:52,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:40:52,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664888079] [2022-03-18 03:40:52,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664888079] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:52,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:52,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 03:40:52,223 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:40:52,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [965946323] [2022-03-18 03:40:52,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [965946323] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:52,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:52,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 03:40:52,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649734652] [2022-03-18 03:40:52,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:40:52,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 03:40:52,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:52,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 03:40:52,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 03:40:52,255 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-03-18 03:40:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:40:52,339 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2022-03-18 03:40:52,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 03:40:52,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2022-03-18 03:40:52,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:40:52,348 INFO L225 Difference]: With dead ends: 57 [2022-03-18 03:40:52,348 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 03:40:52,350 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 [2022-03-18 03:40:52,358 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:40:52,359 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:40:52,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 03:40:52,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-18 03:40:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 03:40:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-03-18 03:40:52,394 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-03-18 03:40:52,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:40:52,394 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-03-18 03:40:52,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-03-18 03:40:52,395 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-03-18 03:40:52,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 03:40:52,395 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:52,396 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:52,396 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 03:40:52,396 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:52,397 INFO L85 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 1 times [2022-03-18 03:40:52,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:52,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [307329877] [2022-03-18 03:40:52,398 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:40:52,398 INFO L85 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 2 times [2022-03-18 03:40:52,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:40:52,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470639677] [2022-03-18 03:40:52,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:52,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:40:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:52,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:40:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:40:52,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:40:52,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470639677] [2022-03-18 03:40:52,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470639677] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:52,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:52,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:40:52,482 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:40:52,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [307329877] [2022-03-18 03:40:52,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [307329877] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:52,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:52,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:40:52,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830210726] [2022-03-18 03:40:52,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:40:52,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 03:40:52,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:52,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 03:40:52,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:40:52,493 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-03-18 03:40:52,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:40:52,643 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-03-18 03:40:52,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 03:40:52,649 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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 12 [2022-03-18 03:40:52,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:40:52,650 INFO L225 Difference]: With dead ends: 41 [2022-03-18 03:40:52,650 INFO L226 Difference]: Without dead ends: 39 [2022-03-18 03:40:52,651 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 03:40:52,652 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:40:52,652 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:40:52,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-18 03:40:52,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-03-18 03:40:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 03:40:52,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-18 03:40:52,662 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-03-18 03:40:52,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:40:52,663 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-18 03:40:52,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-03-18 03:40:52,668 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-18 03:40:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-18 03:40:52,669 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:52,676 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:52,677 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 03:40:52,677 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:52,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:52,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 1 times [2022-03-18 03:40:52,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:52,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [387259064] [2022-03-18 03:40:52,679 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:40:52,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 2 times [2022-03-18 03:40:52,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:40:52,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623319682] [2022-03-18 03:40:52,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:52,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:40:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:52,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:40:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:40:52,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:40:52,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623319682] [2022-03-18 03:40:52,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623319682] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:52,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:52,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 03:40:52,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:40:52,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [387259064] [2022-03-18 03:40:52,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [387259064] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:52,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:52,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 03:40:52,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119075642] [2022-03-18 03:40:52,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:40:52,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 03:40:52,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:52,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 03:40:52,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:40:52,794 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 03:40:52,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:40:52,921 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-03-18 03:40:52,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-18 03:40:52,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-18 03:40:52,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:40:52,925 INFO L225 Difference]: With dead ends: 46 [2022-03-18 03:40:52,925 INFO L226 Difference]: Without dead ends: 32 [2022-03-18 03:40:52,926 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:40:52,926 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:40:52,927 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:40:52,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-18 03:40:52,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-18 03:40:52,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 03:40:52,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-18 03:40:52,936 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-03-18 03:40:52,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:40:52,936 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-18 03:40:52,937 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 03:40:52,937 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-18 03:40:52,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 03:40:52,937 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:52,937 INFO L500 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:52,937 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 03:40:52,938 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:52,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:52,938 INFO L85 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 1 times [2022-03-18 03:40:52,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:52,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1011023464] [2022-03-18 03:40:52,945 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:40:52,946 INFO L85 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 2 times [2022-03-18 03:40:52,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:40:52,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59450082] [2022-03-18 03:40:52,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:52,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:40:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:53,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 03:40:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:53,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-18 03:40:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 03:40:53,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:40:53,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59450082] [2022-03-18 03:40:53,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59450082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:53,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:53,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:40:53,044 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:40:53,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1011023464] [2022-03-18 03:40:53,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1011023464] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:53,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:53,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-18 03:40:53,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026268230] [2022-03-18 03:40:53,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:40:53,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-18 03:40:53,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:53,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-18 03:40:53,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:40:53,046 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 03:40:53,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:40:53,179 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-18 03:40:53,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 03:40:53,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-03-18 03:40:53,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:40:53,182 INFO L225 Difference]: With dead ends: 46 [2022-03-18 03:40:53,182 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 03:40:53,184 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-18 03:40:53,192 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:40:53,195 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:40:53,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 03:40:53,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-03-18 03:40:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 03:40:53,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-03-18 03:40:53,202 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-03-18 03:40:53,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:40:53,202 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-03-18 03:40:53,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 03:40:53,203 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-03-18 03:40:53,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 03:40:53,207 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:53,207 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:53,208 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 03:40:53,208 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:53,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:53,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 1 times [2022-03-18 03:40:53,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:53,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [17767209] [2022-03-18 03:40:53,215 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:40:53,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 2 times [2022-03-18 03:40:53,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:40:53,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969916872] [2022-03-18 03:40:53,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:53,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:40:53,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:40:53,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437461168] [2022-03-18 03:40:53,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:40:53,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:40:53,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:40:53,237 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) [2022-03-18 03:40:53,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 03:40:53,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:40:53,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:40:53,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 03:40:53,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:40:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 03:40:53,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:40:53,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:40:53,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969916872] [2022-03-18 03:40:53,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:40:53,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437461168] [2022-03-18 03:40:53,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437461168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:53,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:53,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:40:53,473 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:40:53,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [17767209] [2022-03-18 03:40:53,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [17767209] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:53,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:53,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:40:53,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087731088] [2022-03-18 03:40:53,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:40:53,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 03:40:53,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:53,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 03:40:53,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:40:53,475 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 03:40:53,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:40:53,527 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2022-03-18 03:40:53,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 03:40:53,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-18 03:40:53,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:40:53,530 INFO L225 Difference]: With dead ends: 65 [2022-03-18 03:40:53,531 INFO L226 Difference]: Without dead ends: 50 [2022-03-18 03:40:53,531 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:40:53,534 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 03:40:53,534 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 03:40:53,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-18 03:40:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-18 03:40:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 03:40:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-18 03:40:53,556 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-03-18 03:40:53,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:40:53,557 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-18 03:40:53,557 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 03:40:53,557 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-18 03:40:53,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 03:40:53,557 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:53,557 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:53,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 03:40:53,758 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:40:53,759 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:53,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:53,759 INFO L85 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 1 times [2022-03-18 03:40:53,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:53,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1945252800] [2022-03-18 03:40:53,760 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:40:53,760 INFO L85 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 2 times [2022-03-18 03:40:53,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:40:53,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200074332] [2022-03-18 03:40:53,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:53,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:40:53,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:40:53,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323665615] [2022-03-18 03:40:53,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:40:53,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:40:53,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:40:53,771 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) [2022-03-18 03:40:53,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 03:40:53,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:40:53,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:40:53,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 03:40:53,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:40:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 03:40:53,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:40:53,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:40:53,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200074332] [2022-03-18 03:40:53,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:40:53,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323665615] [2022-03-18 03:40:53,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323665615] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:53,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:53,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:40:53,921 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:40:53,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1945252800] [2022-03-18 03:40:53,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1945252800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:53,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:53,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:40:53,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871086525] [2022-03-18 03:40:53,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:40:53,923 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 03:40:53,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:53,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 03:40:53,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:40:53,924 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 03:40:53,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:40:53,957 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-03-18 03:40:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 03:40:53,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-18 03:40:53,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:40:53,961 INFO L225 Difference]: With dead ends: 70 [2022-03-18 03:40:53,961 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 03:40:53,961 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:40:53,962 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 03:40:53,962 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 124 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 03:40:53,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 03:40:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-18 03:40:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 03:40:53,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-03-18 03:40:53,981 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-03-18 03:40:53,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:40:53,984 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-03-18 03:40:53,984 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 03:40:53,984 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-03-18 03:40:53,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 03:40:53,985 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:53,985 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:54,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 03:40:54,186 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,SelfDestructingSolverStorable5 [2022-03-18 03:40:54,186 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:54,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:54,187 INFO L85 PathProgramCache]: Analyzing trace with hash 216379368, now seen corresponding path program 1 times [2022-03-18 03:40:54,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:54,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1408243435] [2022-03-18 03:40:54,187 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 03:40:54,187 INFO L85 PathProgramCache]: Analyzing trace with hash 216379368, now seen corresponding path program 2 times [2022-03-18 03:40:54,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:40:54,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738454552] [2022-03-18 03:40:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:54,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:40:54,196 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:40:54,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489687334] [2022-03-18 03:40:54,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 03:40:54,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:40:54,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:40:54,198 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) [2022-03-18 03:40:54,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 03:40:54,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 03:40:54,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 03:40:54,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 03:40:54,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:40:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 03:40:54,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:40:54,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:40:54,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738454552] [2022-03-18 03:40:54,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:40:54,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489687334] [2022-03-18 03:40:54,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489687334] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:54,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:54,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:40:54,333 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:40:54,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1408243435] [2022-03-18 03:40:54,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1408243435] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:54,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:54,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:40:54,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456136984] [2022-03-18 03:40:54,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:40:54,334 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 03:40:54,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:54,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 03:40:54,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 03:40:54,335 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 03:40:54,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:40:54,373 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2022-03-18 03:40:54,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 03:40:54,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-03-18 03:40:54,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:40:54,374 INFO L225 Difference]: With dead ends: 76 [2022-03-18 03:40:54,375 INFO L226 Difference]: Without dead ends: 64 [2022-03-18 03:40:54,375 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 03:40:54,376 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 03:40:54,376 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 103 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 03:40:54,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-18 03:40:54,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-18 03:40:54,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 41 states have internal predecessors, (48), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 03:40:54,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-03-18 03:40:54,385 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-03-18 03:40:54,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:40:54,385 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-03-18 03:40:54,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 03:40:54,385 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-03-18 03:40:54,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 03:40:54,386 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:54,387 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:54,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 03:40:54,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:40:54,608 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:54,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:54,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1255015940, now seen corresponding path program 1 times [2022-03-18 03:40:54,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:54,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1286993807] [2022-03-18 03:40:55,212 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 03:40:55,213 INFO L85 PathProgramCache]: Analyzing trace with hash -861149586, now seen corresponding path program 1 times [2022-03-18 03:40:55,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:40:55,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143577036] [2022-03-18 03:40:55,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:55,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:40:55,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:40:55,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121033423] [2022-03-18 03:40:55,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:40:55,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:40:55,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:40:55,222 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) [2022-03-18 03:40:55,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 03:40:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:40:55,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 03:40:55,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:40:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 03:40:55,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:40:55,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:40:55,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143577036] [2022-03-18 03:40:55,337 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:40:55,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121033423] [2022-03-18 03:40:55,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121033423] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:55,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:55,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:40:56,534 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:40:56,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1286993807] [2022-03-18 03:40:56,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1286993807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:40:56,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:40:56,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 03:40:56,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074616981] [2022-03-18 03:40:56,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:40:56,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 03:40:56,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:56,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 03:40:56,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-18 03:40:56,537 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 03:40:57,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:40:57,253 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2022-03-18 03:40:57,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 03:40:57,253 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 37 [2022-03-18 03:40:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:40:57,255 INFO L225 Difference]: With dead ends: 90 [2022-03-18 03:40:57,255 INFO L226 Difference]: Without dead ends: 65 [2022-03-18 03:40:57,256 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-03-18 03:40:57,257 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 03:40:57,257 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 293 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 03:40:57,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-18 03:40:57,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-18 03:40:57,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 43 states have internal predecessors, (50), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 03:40:57,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-03-18 03:40:57,267 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 37 [2022-03-18 03:40:57,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:40:57,267 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-03-18 03:40:57,268 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.411764705882353) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 03:40:57,268 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-03-18 03:40:57,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 03:40:57,268 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:40:57,269 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:40:57,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 03:40:57,493 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:40:57,494 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:40:57,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:40:57,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1057559728, now seen corresponding path program 1 times [2022-03-18 03:40:57,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:40:57,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1022138454] [2022-03-18 03:41:50,750 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 03:41:50,751 INFO L85 PathProgramCache]: Analyzing trace with hash 449890654, now seen corresponding path program 1 times [2022-03-18 03:41:50,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:41:50,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121166635] [2022-03-18 03:41:50,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:41:50,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:41:50,757 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:41:50,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854059092] [2022-03-18 03:41:50,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:41:50,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:41:50,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:41:50,764 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) [2022-03-18 03:41:50,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 03:41:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:41:50,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 03:41:50,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:41:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 03:41:50,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:41:50,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:41:50,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121166635] [2022-03-18 03:41:50,894 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:41:50,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854059092] [2022-03-18 03:41:50,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854059092] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:41:50,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:41:50,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:41:51,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:41:51,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1022138454] [2022-03-18 03:41:51,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1022138454] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:41:51,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:41:51,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-18 03:41:51,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570948656] [2022-03-18 03:41:51,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:41:51,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 03:41:51,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:41:51,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 03:41:51,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-18 03:41:51,239 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 03:41:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:41:51,446 INFO L93 Difference]: Finished difference Result 105 states and 137 transitions. [2022-03-18 03:41:51,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-18 03:41:51,447 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2022-03-18 03:41:51,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:41:51,448 INFO L225 Difference]: With dead ends: 105 [2022-03-18 03:41:51,448 INFO L226 Difference]: Without dead ends: 73 [2022-03-18 03:41:51,449 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-03-18 03:41:51,449 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:41:51,449 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 250 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:41:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-18 03:41:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-18 03:41:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.2) internal successors, (54), 47 states have internal predecessors, (54), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 03:41:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2022-03-18 03:41:51,459 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 40 [2022-03-18 03:41:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:41:51,459 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2022-03-18 03:41:51,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 03:41:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2022-03-18 03:41:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-18 03:41:51,460 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:41:51,461 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:41:51,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 03:41:51,676 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:41:51,676 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:41:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:41:51,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1864650262, now seen corresponding path program 2 times [2022-03-18 03:41:51,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:41:51,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1701417359] [2022-03-18 03:42:05,382 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 03:42:05,383 INFO L85 PathProgramCache]: Analyzing trace with hash 237971182, now seen corresponding path program 1 times [2022-03-18 03:42:05,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:42:05,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508672007] [2022-03-18 03:42:05,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:42:05,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:42:05,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:42:05,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113700947] [2022-03-18 03:42:05,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:42:05,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:42:05,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:42:05,396 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) [2022-03-18 03:42:05,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 03:42:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:42:05,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 03:42:05,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:42:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 03:42:05,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:42:05,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:42:05,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508672007] [2022-03-18 03:42:05,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:42:05,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113700947] [2022-03-18 03:42:05,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113700947] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:42:05,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:42:05,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:42:06,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:42:06,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1701417359] [2022-03-18 03:42:06,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1701417359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:42:06,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:42:06,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-18 03:42:06,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702267699] [2022-03-18 03:42:06,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:42:06,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 03:42:06,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:42:06,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 03:42:06,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 03:42:06,250 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 34 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 21 states have internal predecessors, (36), 9 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 03:42:07,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:42:07,055 INFO L93 Difference]: Finished difference Result 114 states and 144 transitions. [2022-03-18 03:42:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 03:42:07,055 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 21 states have internal predecessors, (36), 9 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 55 [2022-03-18 03:42:07,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:42:07,057 INFO L225 Difference]: With dead ends: 114 [2022-03-18 03:42:07,057 INFO L226 Difference]: Without dead ends: 89 [2022-03-18 03:42:07,058 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=257, Invalid=1635, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 03:42:07,059 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 47 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 03:42:07,059 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 189 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 03:42:07,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-18 03:42:07,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2022-03-18 03:42:07,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 states have internal predecessors, (61), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 03:42:07,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2022-03-18 03:42:07,072 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 55 [2022-03-18 03:42:07,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:42:07,072 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2022-03-18 03:42:07,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 21 states have internal predecessors, (36), 9 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 03:42:07,073 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2022-03-18 03:42:07,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 03:42:07,073 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 03:42:07,073 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 03:42:07,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 03:42:07,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:42:07,288 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 03:42:07,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 03:42:07,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1879054090, now seen corresponding path program 2 times [2022-03-18 03:42:07,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 03:42:07,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1234009224] [2022-03-18 03:43:46,207 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-18 03:43:46,207 INFO L85 PathProgramCache]: Analyzing trace with hash -473974562, now seen corresponding path program 1 times [2022-03-18 03:43:46,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 03:43:46,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349638342] [2022-03-18 03:43:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:43:46,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 03:43:46,213 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 03:43:46,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444894420] [2022-03-18 03:43:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 03:43:46,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:43:46,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 03:43:46,218 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 03:43:46,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 03:43:46,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 03:43:46,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 03:43:46,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 03:43:46,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 03:43:46,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 03:43:46,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 03:43:46,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349638342] [2022-03-18 03:43:46,321 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 03:43:46,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444894420] [2022-03-18 03:43:46,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444894420] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:43:46,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:43:46,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 03:43:47,461 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 03:43:47,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1234009224] [2022-03-18 03:43:47,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1234009224] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 03:43:47,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 03:43:47,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-18 03:43:47,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148829385] [2022-03-18 03:43:47,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 03:43:47,462 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 03:43:47,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 03:43:47,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 03:43:47,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-03-18 03:43:47,463 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 16 states have internal predecessors, (28), 6 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-18 03:43:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 03:43:47,596 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2022-03-18 03:43:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 03:43:47,597 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 16 states have internal predecessors, (28), 6 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 58 [2022-03-18 03:43:47,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 03:43:47,597 INFO L225 Difference]: With dead ends: 82 [2022-03-18 03:43:47,597 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 03:43:47,598 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-03-18 03:43:47,598 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 03:43:47,599 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 76 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 03:43:47,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 03:43:47,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 03:43:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-18 03:43:47,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 03:43:47,600 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2022-03-18 03:43:47,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 03:43:47,600 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 03:43:47,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 16 states have internal predecessors, (28), 6 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-18 03:43:47,600 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 03:43:47,600 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 03:43:47,602 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 03:43:47,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-18 03:43:47,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 03:43:47,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 03:43:48,776 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-03-18 03:43:48,776 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-03-18 03:43:48,776 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-03-18 03:43:48,776 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2022-03-18 03:43:48,776 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-03-18 03:43:48,776 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-03-18 03:43:48,776 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-03-18 03:43:48,776 INFO L878 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (or (and (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:43:48,776 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 23 61) the Hoare annotation is: true [2022-03-18 03:43:48,776 INFO L878 garLoopResultBuilder]: At program point L52(lines 52 55) the Hoare annotation is: (not (<= |old(~counter~0)| 0)) [2022-03-18 03:43:48,776 INFO L878 garLoopResultBuilder]: At program point L52-2(lines 23 61) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:43:48,777 INFO L878 garLoopResultBuilder]: At program point L46(lines 44 56) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:43:48,777 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 23 61) the Hoare annotation is: true [2022-03-18 03:43:48,777 INFO L878 garLoopResultBuilder]: At program point L44(lines 44 56) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:43:48,777 INFO L878 garLoopResultBuilder]: At program point L44-2(lines 44 56) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:43:48,777 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (<= ~counter~0 1) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1))) [2022-03-18 03:43:48,777 INFO L878 garLoopResultBuilder]: At program point L34-1(lines 34 42) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= ~counter~0 (+ |main_#t~post5| 1)) (= main_~A~0 main_~r~0) (<= ~counter~0 1) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1))) [2022-03-18 03:43:48,777 INFO L878 garLoopResultBuilder]: At program point L34-3(lines 34 42) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (= main_~q~0 0))) (or (not (<= |old(~counter~0)| 0)) (and (= ~counter~0 |old(~counter~0)|) .cse0 .cse1 (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and (<= 1 main_~B~0) (= (* 2 (* (div (* (- 1) main_~p~0) (- 2)) main_~B~0)) main_~d~0) .cse0 (<= ~counter~0 1) .cse1 (= (mod main_~p~0 2) 0) (<= (* main_~B~0 (div main_~p~0 2)) main_~r~0)))) [2022-03-18 03:43:48,777 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 23 61) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:43:48,777 INFO L885 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: true [2022-03-18 03:43:48,777 INFO L878 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:43:48,777 INFO L878 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) (not (<= |old(~counter~0)| 0))) [2022-03-18 03:43:48,777 INFO L878 garLoopResultBuilder]: At program point L37(lines 34 42) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (<= ~counter~0 1) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1))) [2022-03-18 03:43:48,778 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (<= ~counter~0 1) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1))) [2022-03-18 03:43:48,778 INFO L878 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~A~0 main_~r~0) (<= ~counter~0 1) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1))) [2022-03-18 03:43:48,778 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-03-18 03:43:48,778 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-18 03:43:48,778 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-03-18 03:43:48,778 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-18 03:43:48,778 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-03-18 03:43:48,778 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 03:43:48,778 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-18 03:43:48,778 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-18 03:43:48,778 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (let ((.cse0 (not (= |__VERIFIER_assert_#in~cond| 1))) (.cse1 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (.cse2 (not (<= ~counter~0 1)))) (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or .cse0 (not (= main_~q~0 0)) .cse1 .cse2) (or .cse0 .cse1 (not (= main_~A~0 main_~r~0)) .cse2) (or .cse0 .cse1 (not (= main_~B~0 main_~d~0)) .cse2 (not (= main_~p~0 1)) (not (= main_~B~0 1))))) [2022-03-18 03:43:48,778 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-18 03:43:48,778 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (let ((.cse0 (not (= |__VERIFIER_assert_#in~cond| 1))) (.cse1 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (.cse2 (not (<= ~counter~0 1)))) (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or .cse0 (not (= main_~q~0 0)) .cse1 .cse2) (or .cse0 .cse1 (not (= main_~A~0 main_~r~0)) .cse2) (or .cse0 .cse1 (not (= main_~B~0 main_~d~0)) .cse2 (not (= main_~p~0 1)) (not (= main_~B~0 1))))) [2022-03-18 03:43:48,778 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (let ((.cse0 (not (= |__VERIFIER_assert_#in~cond| 1))) (.cse1 (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (.cse2 (not (<= ~counter~0 1)))) (and (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) (or .cse0 (not (= main_~q~0 0)) .cse1 .cse2) (or .cse0 .cse1 (not (= main_~A~0 main_~r~0)) .cse2) (or .cse0 .cse1 (not (= main_~B~0 main_~d~0)) .cse2 (not (= main_~p~0 1)) (not (= main_~B~0 1))))) [2022-03-18 03:43:48,778 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-18 03:43:48,780 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-03-18 03:43:48,781 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 03:43:48,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 03:43:48 BoogieIcfgContainer [2022-03-18 03:43:48,793 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 03:43:48,793 INFO L158 Benchmark]: Toolchain (without parser) took 177447.42ms. Allocated memory was 192.9MB in the beginning and 244.3MB in the end (delta: 51.4MB). Free memory was 146.4MB in the beginning and 206.7MB in the end (delta: -60.2MB). Peak memory consumption was 112.9MB. Max. memory is 8.0GB. [2022-03-18 03:43:48,793 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 192.9MB. Free memory was 163.4MB in the beginning and 163.3MB in the end (delta: 88.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 03:43:48,794 INFO L158 Benchmark]: CACSL2BoogieTranslator took 238.61ms. Allocated memory is still 192.9MB. Free memory was 146.3MB in the beginning and 172.9MB in the end (delta: -26.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 03:43:48,794 INFO L158 Benchmark]: Boogie Preprocessor took 41.39ms. Allocated memory is still 192.9MB. Free memory was 172.9MB in the beginning and 171.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 03:43:48,794 INFO L158 Benchmark]: RCFGBuilder took 335.12ms. Allocated memory is still 192.9MB. Free memory was 171.3MB in the beginning and 160.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-18 03:43:48,794 INFO L158 Benchmark]: TraceAbstraction took 176827.79ms. Allocated memory was 192.9MB in the beginning and 244.3MB in the end (delta: 51.4MB). Free memory was 160.1MB in the beginning and 206.7MB in the end (delta: -46.6MB). Peak memory consumption was 126.9MB. Max. memory is 8.0GB. [2022-03-18 03:43:48,795 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 192.9MB. Free memory was 163.4MB in the beginning and 163.3MB in the end (delta: 88.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 238.61ms. Allocated memory is still 192.9MB. Free memory was 146.3MB in the beginning and 172.9MB in the end (delta: -26.7MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 41.39ms. Allocated memory is still 192.9MB. Free memory was 172.9MB in the beginning and 171.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 335.12ms. Allocated memory is still 192.9MB. Free memory was 171.3MB in the beginning and 160.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 176827.79ms. Allocated memory was 192.9MB in the beginning and 244.3MB in the end (delta: 51.4MB). Free memory was 160.1MB in the beginning and 206.7MB in the end (delta: -46.6MB). Peak memory consumption was 126.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 176.8s, OverallIterations: 11, TraceHistogramMax: 9, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 225 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 201 mSDsluCounter, 1458 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1100 mSDsCounter, 203 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1480 IncrementalHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 203 mSolverCounterUnsat, 358 mSDtfsCounter, 1480 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 374 GetRequests, 224 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=10, InterpolantAutomatonStates: 115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 27 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 31 LocationsWithAnnotation, 403 PreInvPairs, 482 NumberOfFragments, 567 HoareAnnotationTreeSize, 403 FomulaSimplifications, 319 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 31 FomulaSimplificationsInter, 790 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (!(\old(counter) <= 0) || (((((counter == \old(counter) && A == r) && q == 0) && B == 1) && B == d) && p == 1)) || ((((((1 <= B && 2 * (-1 * p / -2 * B) == d) && A == r) && counter <= 1) && q == 0) && p % 2 == 0) && B * (p / 2) <= r) - ProcedureContractResult [Line: 23]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: (((!(1 <= \old(cond)) || 1 <= cond) && (((!(\old(cond) == 1) || !(q == 0)) || \old(cond) == cond) || !(counter <= 1))) && (((!(\old(cond) == 1) || \old(cond) == cond) || !(A == r)) || !(counter <= 1))) && (((((!(\old(cond) == 1) || \old(cond) == cond) || !(B == d)) || !(counter <= 1)) || !(p == 1)) || !(B == 1)) RESULT: Ultimate proved your program to be correct! [2022-03-18 03:43:48,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...