/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_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 21:54:08,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 21:54:08,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 21:54:09,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 21:54:09,057 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 21:54:09,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 21:54:09,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 21:54:09,059 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 21:54:09,068 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 21:54:09,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 21:54:09,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 21:54:09,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 21:54:09,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 21:54:09,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 21:54:09,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 21:54:09,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 21:54:09,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 21:54:09,071 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 21:54:09,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 21:54:09,071 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 21:54:09,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 21:54:09,071 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 21:54:09,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 21:54:09,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 21:54:09,072 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 21:54:09,072 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 21:54:09,072 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 21:54:09,072 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 21:54:09,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 21:54:09,072 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 21:54:09,072 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 21:54:09,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 21:54:09,272 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 21:54:09,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 21:54:09,275 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 21:54:09,278 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 21:54:09,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound50.c [2022-03-20 21:54:09,336 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31895a9f7/d7c4749e927b426f8282d66678fa28c5/FLAG0640efa2e [2022-03-20 21:54:09,631 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 21:54:09,632 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_unwindbound50.c [2022-03-20 21:54:09,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31895a9f7/d7c4749e927b426f8282d66678fa28c5/FLAG0640efa2e [2022-03-20 21:54:10,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31895a9f7/d7c4749e927b426f8282d66678fa28c5 [2022-03-20 21:54:10,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 21:54:10,082 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 21:54:10,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 21:54:10,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 21:54:10,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 21:54:10,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:54:10" (1/1) ... [2022-03-20 21:54:10,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ad163ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:54:10, skipping insertion in model container [2022-03-20 21:54:10,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:54:10" (1/1) ... [2022-03-20 21:54:10,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 21:54:10,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 21:54:10,226 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_unwindbound50.c[526,539] [2022-03-20 21:54:10,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 21:54:10,243 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 21:54:10,251 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_unwindbound50.c[526,539] [2022-03-20 21:54:10,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 21:54:10,264 INFO L208 MainTranslator]: Completed translation [2022-03-20 21:54:10,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:54:10 WrapperNode [2022-03-20 21:54:10,265 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 21:54:10,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 21:54:10,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 21:54:10,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 21:54:10,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:54:10" (1/1) ... [2022-03-20 21:54:10,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:54:10" (1/1) ... [2022-03-20 21:54:10,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:54:10" (1/1) ... [2022-03-20 21:54:10,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:54:10" (1/1) ... [2022-03-20 21:54:10,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:54:10" (1/1) ... [2022-03-20 21:54:10,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:54:10" (1/1) ... [2022-03-20 21:54:10,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:54:10" (1/1) ... [2022-03-20 21:54:10,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 21:54:10,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 21:54:10,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 21:54:10,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 21:54:10,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:54:10" (1/1) ... [2022-03-20 21:54:10,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 21:54:10,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:54:10,326 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 21:54:10,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 21:54:10,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 21:54:10,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 21:54:10,353 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 21:54:10,353 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 21:54:10,353 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 21:54:10,353 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 21:54:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 21:54:10,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 21:54:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 21:54:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 21:54:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 21:54:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 21:54:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 21:54:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 21:54:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 21:54:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 21:54:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 21:54:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 21:54:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 21:54:10,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 21:54:10,400 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 21:54:10,401 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 21:54:10,536 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 21:54:10,542 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 21:54:10,542 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 21:54:10,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:54:10 BoogieIcfgContainer [2022-03-20 21:54:10,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 21:54:10,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 21:54:10,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 21:54:10,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 21:54:10,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:54:10" (1/3) ... [2022-03-20 21:54:10,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3526adba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:54:10, skipping insertion in model container [2022-03-20 21:54:10,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:54:10" (2/3) ... [2022-03-20 21:54:10,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3526adba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:54:10, skipping insertion in model container [2022-03-20 21:54:10,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:54:10" (3/3) ... [2022-03-20 21:54:10,549 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound50.c [2022-03-20 21:54:10,553 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 21:54:10,553 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 21:54:10,584 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 21:54:10,597 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 [2022-03-20 21:54:10,597 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 21:54:10,616 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) [2022-03-20 21:54:10,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 21:54:10,629 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:54:10,630 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:54:10,630 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:54:10,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:54:10,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 1 times [2022-03-20 21:54:10,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:54:10,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1536888409] [2022-03-20 21:54:10,648 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:54:10,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1682617676, now seen corresponding path program 2 times [2022-03-20 21:54:10,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:54:10,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637250577] [2022-03-20 21:54:10,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:54:10,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:54:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:54:10,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 21:54:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:54:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 21:54:10,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:54:10,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637250577] [2022-03-20 21:54:10,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637250577] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:54:10,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:54:10,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 21:54:10,836 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:54:10,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1536888409] [2022-03-20 21:54:10,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1536888409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:54:10,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:54:10,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 21:54:10,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285376283] [2022-03-20 21:54:10,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:54:10,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 21:54:10,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:54:10,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 21:54:10,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 21:54:10,859 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) [2022-03-20 21:54:10,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:54:10,923 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2022-03-20 21:54:10,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 21:54:10,926 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 [2022-03-20 21:54:10,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:54:10,930 INFO L225 Difference]: With dead ends: 57 [2022-03-20 21:54:10,931 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 21:54:10,933 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 21:54:10,935 INFO L913 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:54:10,936 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 44 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:54:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 21:54:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-20 21:54:10,960 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) [2022-03-20 21:54:10,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2022-03-20 21:54:10,962 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2022-03-20 21:54:10,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:54:10,963 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2022-03-20 21:54:10,963 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) [2022-03-20 21:54:10,963 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2022-03-20 21:54:10,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 21:54:10,963 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:54:10,964 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:54:10,964 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 21:54:10,964 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:54:10,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:54:10,965 INFO L85 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 1 times [2022-03-20 21:54:10,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:54:10,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [781281312] [2022-03-20 21:54:10,965 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:54:10,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2144676086, now seen corresponding path program 2 times [2022-03-20 21:54:10,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:54:10,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210596094] [2022-03-20 21:54:10,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:54:10,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:54:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:54:11,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 21:54:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:54:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 21:54:11,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:54:11,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210596094] [2022-03-20 21:54:11,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210596094] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:54:11,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:54:11,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 21:54:11,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:54:11,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [781281312] [2022-03-20 21:54:11,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [781281312] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:54:11,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:54:11,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 21:54:11,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939242234] [2022-03-20 21:54:11,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:54:11,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 21:54:11,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:54:11,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 21:54:11,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 21:54:11,035 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) [2022-03-20 21:54:11,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:54:11,139 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2022-03-20 21:54:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 21:54:11,140 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 [2022-03-20 21:54:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:54:11,141 INFO L225 Difference]: With dead ends: 41 [2022-03-20 21:54:11,142 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 21:54:11,144 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 21:54:11,146 INFO L913 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 [2022-03-20 21:54:11,148 INFO L914 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] [2022-03-20 21:54:11,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 21:54:11,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2022-03-20 21:54:11,166 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) [2022-03-20 21:54:11,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-03-20 21:54:11,169 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-03-20 21:54:11,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:54:11,169 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-03-20 21:54:11,169 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) [2022-03-20 21:54:11,169 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-03-20 21:54:11,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 21:54:11,170 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:54:11,170 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:54:11,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 21:54:11,171 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:54:11,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:54:11,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 1 times [2022-03-20 21:54:11,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:54:11,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1317097543] [2022-03-20 21:54:11,178 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:54:11,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1842794081, now seen corresponding path program 2 times [2022-03-20 21:54:11,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:54:11,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774476075] [2022-03-20 21:54:11,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:54:11,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:54:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:54:11,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 21:54:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:54:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 21:54:11,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:54:11,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774476075] [2022-03-20 21:54:11,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774476075] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:54:11,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:54:11,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 21:54:11,265 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:54:11,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1317097543] [2022-03-20 21:54:11,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1317097543] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:54:11,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:54:11,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 21:54:11,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571085388] [2022-03-20 21:54:11,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:54:11,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 21:54:11,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:54:11,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 21:54:11,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 21:54:11,268 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) [2022-03-20 21:54:11,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:54:11,338 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-03-20 21:54:11,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 21:54:11,339 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 [2022-03-20 21:54:11,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:54:11,340 INFO L225 Difference]: With dead ends: 46 [2022-03-20 21:54:11,340 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 21:54:11,341 INFO L912 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 [2022-03-20 21:54:11,343 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:54:11,348 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:54:11,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 21:54:11,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-03-20 21:54:11,358 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) [2022-03-20 21:54:11,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-03-20 21:54:11,360 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 14 [2022-03-20 21:54:11,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:54:11,361 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-03-20 21:54:11,361 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) [2022-03-20 21:54:11,361 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-03-20 21:54:11,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 21:54:11,361 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:54:11,362 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:54:11,362 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 21:54:11,363 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:54:11,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:54:11,364 INFO L85 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 1 times [2022-03-20 21:54:11,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:54:11,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [791482524] [2022-03-20 21:54:11,367 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:54:11,367 INFO L85 PathProgramCache]: Analyzing trace with hash 311129497, now seen corresponding path program 2 times [2022-03-20 21:54:11,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:54:11,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755983507] [2022-03-20 21:54:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:54:11,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:54:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:54:11,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 21:54:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:54:11,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-03-20 21:54:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:54:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 21:54:11,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:54:11,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755983507] [2022-03-20 21:54:11,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755983507] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:54:11,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:54:11,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 21:54:11,477 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:54:11,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [791482524] [2022-03-20 21:54:11,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [791482524] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:54:11,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:54:11,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 21:54:11,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4117135] [2022-03-20 21:54:11,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:54:11,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 21:54:11,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:54:11,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 21:54:11,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 21:54:11,481 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) [2022-03-20 21:54:11,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:54:11,591 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-20 21:54:11,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 21:54:11,592 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 [2022-03-20 21:54:11,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:54:11,593 INFO L225 Difference]: With dead ends: 46 [2022-03-20 21:54:11,593 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 21:54:11,594 INFO L912 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 [2022-03-20 21:54:11,595 INFO L913 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 [2022-03-20 21:54:11,596 INFO L914 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] [2022-03-20 21:54:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 21:54:11,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2022-03-20 21:54:11,609 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) [2022-03-20 21:54:11,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-03-20 21:54:11,611 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 17 [2022-03-20 21:54:11,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:54:11,611 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-03-20 21:54:11,611 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) [2022-03-20 21:54:11,611 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-03-20 21:54:11,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 21:54:11,612 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:54:11,612 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:54:11,612 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 21:54:11,613 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:54:11,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:54:11,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 1 times [2022-03-20 21:54:11,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:54:11,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1299663344] [2022-03-20 21:54:11,618 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:54:11,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1912623062, now seen corresponding path program 2 times [2022-03-20 21:54:11,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:54:11,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260140307] [2022-03-20 21:54:11,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:54:11,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:54:11,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:54:11,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715530240] [2022-03-20 21:54:11,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:54:11,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:54:11,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:54:11,644 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:54:11,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 21:54:11,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:54:11,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:54:11,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 21:54:11,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:54:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:54:11,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:54:11,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:54:11,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260140307] [2022-03-20 21:54:11,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:54:11,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715530240] [2022-03-20 21:54:11,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715530240] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:54:11,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:54:11,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:54:11,871 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:54:11,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1299663344] [2022-03-20 21:54:11,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1299663344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:54:11,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:54:11,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:54:11,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120082189] [2022-03-20 21:54:11,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:54:11,872 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 21:54:11,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:54:11,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 21:54:11,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 21:54:11,873 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) [2022-03-20 21:54:11,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:54:11,917 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2022-03-20 21:54:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 21:54:11,918 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 [2022-03-20 21:54:11,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:54:11,919 INFO L225 Difference]: With dead ends: 65 [2022-03-20 21:54:11,919 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 21:54:11,920 INFO L912 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 [2022-03-20 21:54:11,920 INFO L913 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 [2022-03-20 21:54:11,921 INFO L914 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] [2022-03-20 21:54:11,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 21:54:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-03-20 21:54:11,928 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) [2022-03-20 21:54:11,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-03-20 21:54:11,931 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 22 [2022-03-20 21:54:11,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:54:11,931 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-03-20 21:54:11,931 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) [2022-03-20 21:54:11,931 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-03-20 21:54:11,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 21:54:11,932 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:54:11,932 INFO L499 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] [2022-03-20 21:54:11,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 21:54:12,132 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 [2022-03-20 21:54:12,133 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:54:12,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:54:12,133 INFO L85 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 1 times [2022-03-20 21:54:12,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:54:12,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [557553660] [2022-03-20 21:54:12,134 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:54:12,134 INFO L85 PathProgramCache]: Analyzing trace with hash 214651490, now seen corresponding path program 2 times [2022-03-20 21:54:12,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:54:12,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999547506] [2022-03-20 21:54:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:54:12,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:54:12,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:54:12,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [655571618] [2022-03-20 21:54:12,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:54:12,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:54:12,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:54:12,144 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:54:12,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 21:54:12,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:54:12,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:54:12,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 21:54:12,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:54:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 21:54:12,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:54:12,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:54:12,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999547506] [2022-03-20 21:54:12,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:54:12,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655571618] [2022-03-20 21:54:12,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655571618] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:54:12,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:54:12,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:54:12,267 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:54:12,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [557553660] [2022-03-20 21:54:12,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [557553660] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:54:12,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:54:12,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:54:12,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416656730] [2022-03-20 21:54:12,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:54:12,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 21:54:12,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:54:12,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 21:54:12,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 21:54:12,268 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) [2022-03-20 21:54:12,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:54:12,300 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-03-20 21:54:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 21:54:12,300 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 [2022-03-20 21:54:12,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:54:12,301 INFO L225 Difference]: With dead ends: 70 [2022-03-20 21:54:12,301 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 21:54:12,302 INFO L912 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 [2022-03-20 21:54:12,303 INFO L913 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 [2022-03-20 21:54:12,303 INFO L914 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] [2022-03-20 21:54:12,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 21:54:12,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-20 21:54:12,315 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) [2022-03-20 21:54:12,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-03-20 21:54:12,316 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 30 [2022-03-20 21:54:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:54:12,316 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-03-20 21:54:12,317 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) [2022-03-20 21:54:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-03-20 21:54:12,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 21:54:12,318 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:54:12,318 INFO L499 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] [2022-03-20 21:54:12,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 21:54:12,531 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 [2022-03-20 21:54:12,532 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:54:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:54:12,532 INFO L85 PathProgramCache]: Analyzing trace with hash 216379368, now seen corresponding path program 1 times [2022-03-20 21:54:12,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:54:12,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1963783274] [2022-03-20 21:54:12,533 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:54:12,533 INFO L85 PathProgramCache]: Analyzing trace with hash 216379368, now seen corresponding path program 2 times [2022-03-20 21:54:12,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:54:12,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921159166] [2022-03-20 21:54:12,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:54:12,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:54:12,544 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:54:12,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568027081] [2022-03-20 21:54:12,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:54:12,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:54:12,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:54:12,546 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:54:12,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 21:54:12,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:54:12,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:54:12,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 21:54:12,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:54:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 21:54:12,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:54:12,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:54:12,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921159166] [2022-03-20 21:54:12,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:54:12,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568027081] [2022-03-20 21:54:12,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568027081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:54:12,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:54:12,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:54:12,662 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:54:12,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1963783274] [2022-03-20 21:54:12,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1963783274] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:54:12,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:54:12,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:54:12,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550344812] [2022-03-20 21:54:12,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:54:12,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 21:54:12,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:54:12,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 21:54:12,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 21:54:12,663 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) [2022-03-20 21:54:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:54:12,707 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2022-03-20 21:54:12,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 21:54:12,707 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 [2022-03-20 21:54:12,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:54:12,710 INFO L225 Difference]: With dead ends: 76 [2022-03-20 21:54:12,710 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 21:54:12,710 INFO L912 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 [2022-03-20 21:54:12,711 INFO L913 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 [2022-03-20 21:54:12,711 INFO L914 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] [2022-03-20 21:54:12,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 21:54:12,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-20 21:54:12,728 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) [2022-03-20 21:54:12,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-03-20 21:54:12,728 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 30 [2022-03-20 21:54:12,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:54:12,728 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-03-20 21:54:12,728 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) [2022-03-20 21:54:12,729 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-03-20 21:54:12,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 21:54:12,733 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:54:12,734 INFO L499 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] [2022-03-20 21:54:12,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 21:54:12,943 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 [2022-03-20 21:54:12,944 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:54:12,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:54:12,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1255015940, now seen corresponding path program 1 times [2022-03-20 21:54:12,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:54:12,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1085616288] [2022-03-20 21:54:13,424 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 21:54:13,425 INFO L85 PathProgramCache]: Analyzing trace with hash -861149586, now seen corresponding path program 1 times [2022-03-20 21:54:13,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:54:13,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477970217] [2022-03-20 21:54:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:54:13,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:54:13,431 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:54:13,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526101726] [2022-03-20 21:54:13,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:54:13,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:54:13,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:54:13,432 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:54:13,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 21:54:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:54:13,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 21:54:13,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:54:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 21:54:13,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:54:13,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:54:13,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477970217] [2022-03-20 21:54:13,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:54:13,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526101726] [2022-03-20 21:54:13,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526101726] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:54:13,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:54:13,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:54:13,772 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:54:13,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1085616288] [2022-03-20 21:54:13,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1085616288] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:54:13,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:54:13,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 21:54:13,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163846597] [2022-03-20 21:54:13,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:54:13,773 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 21:54:13,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:54:13,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 21:54:13,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-20 21:54:13,774 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) [2022-03-20 21:54:14,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:54:14,772 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2022-03-20 21:54:14,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 21:54:14,772 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 [2022-03-20 21:54:14,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:54:14,774 INFO L225 Difference]: With dead ends: 90 [2022-03-20 21:54:14,774 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 21:54:14,775 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-03-20 21:54:14,775 INFO L913 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 21:54:14,775 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 293 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 21:54:14,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 21:54:14,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-20 21:54:14,781 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) [2022-03-20 21:54:14,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-03-20 21:54:14,782 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 37 [2022-03-20 21:54:14,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:54:14,782 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-03-20 21:54:14,782 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) [2022-03-20 21:54:14,782 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-03-20 21:54:14,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 21:54:14,783 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:54:14,783 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:54:14,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 21:54:14,996 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 [2022-03-20 21:54:14,996 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:54:14,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:54:14,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1057559728, now seen corresponding path program 1 times [2022-03-20 21:54:14,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:54:14,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [458832237] [2022-03-20 21:55:24,735 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 21:55:24,736 INFO L85 PathProgramCache]: Analyzing trace with hash 449890654, now seen corresponding path program 1 times [2022-03-20 21:55:24,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:55:24,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515037534] [2022-03-20 21:55:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:55:24,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:55:24,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:55:24,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099926498] [2022-03-20 21:55:24,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:55:24,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:55:24,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:55:24,743 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:55:24,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 21:55:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:55:24,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 21:55:24,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:55:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:55:24,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:55:24,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:55:24,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515037534] [2022-03-20 21:55:24,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:55:24,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099926498] [2022-03-20 21:55:24,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099926498] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:55:24,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:55:24,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:55:25,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:55:25,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [458832237] [2022-03-20 21:55:25,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [458832237] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:55:25,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:55:25,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 21:55:25,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965740085] [2022-03-20 21:55:25,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:55:25,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 21:55:25,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:55:25,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 21:55:25,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-03-20 21:55:25,113 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) [2022-03-20 21:55:25,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:55:25,307 INFO L93 Difference]: Finished difference Result 105 states and 137 transitions. [2022-03-20 21:55:25,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 21:55:25,307 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 [2022-03-20 21:55:25,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:55:25,308 INFO L225 Difference]: With dead ends: 105 [2022-03-20 21:55:25,308 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 21:55:25,309 INFO L912 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 [2022-03-20 21:55:25,309 INFO L913 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 [2022-03-20 21:55:25,310 INFO L914 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] [2022-03-20 21:55:25,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 21:55:25,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-20 21:55:25,333 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) [2022-03-20 21:55:25,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2022-03-20 21:55:25,334 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 40 [2022-03-20 21:55:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:55:25,334 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2022-03-20 21:55:25,334 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) [2022-03-20 21:55:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2022-03-20 21:55:25,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 21:55:25,336 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:55:25,336 INFO L499 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] [2022-03-20 21:55:25,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 21:55:25,547 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 [2022-03-20 21:55:25,547 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:55:25,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:55:25,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1864650262, now seen corresponding path program 2 times [2022-03-20 21:55:25,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:55:25,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1814569491] [2022-03-20 21:55:31,209 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 21:55:31,210 INFO L85 PathProgramCache]: Analyzing trace with hash 237971182, now seen corresponding path program 1 times [2022-03-20 21:55:31,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:55:31,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388198101] [2022-03-20 21:55:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:55:31,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:55:31,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:55:31,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117470508] [2022-03-20 21:55:31,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:55:31,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:55:31,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:55:31,220 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:55:31,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 21:55:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:55:31,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 21:55:31,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:55:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 21:55:31,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:55:31,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:55:31,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388198101] [2022-03-20 21:55:31,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:55:31,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117470508] [2022-03-20 21:55:31,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117470508] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:55:31,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:55:31,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:55:31,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:55:31,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1814569491] [2022-03-20 21:55:31,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1814569491] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:55:31,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:55:31,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 21:55:31,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595378017] [2022-03-20 21:55:31,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:55:31,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 21:55:31,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:55:31,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 21:55:31,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 21:55:31,910 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) [2022-03-20 21:55:32,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:55:32,625 INFO L93 Difference]: Finished difference Result 114 states and 144 transitions. [2022-03-20 21:55:32,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 21:55:32,626 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 [2022-03-20 21:55:32,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:55:32,626 INFO L225 Difference]: With dead ends: 114 [2022-03-20 21:55:32,626 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 21:55:32,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=257, Invalid=1635, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 21:55:32,629 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 47 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2022-03-20 21:55:32,629 INFO L914 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] [2022-03-20 21:55:32,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 21:55:32,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2022-03-20 21:55:32,638 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) [2022-03-20 21:55:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2022-03-20 21:55:32,638 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 55 [2022-03-20 21:55:32,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:55:32,639 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2022-03-20 21:55:32,639 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) [2022-03-20 21:55:32,639 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2022-03-20 21:55:32,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 21:55:32,639 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:55:32,639 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:55:32,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 21:55:32,855 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 [2022-03-20 21:55:32,857 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:55:32,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:55:32,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1879054090, now seen corresponding path program 2 times [2022-03-20 21:55:32,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:55:32,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1891654558] [2022-03-20 21:57:10,801 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 21:57:10,801 INFO L85 PathProgramCache]: Analyzing trace with hash -473974562, now seen corresponding path program 1 times [2022-03-20 21:57:10,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:57:10,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460703710] [2022-03-20 21:57:10,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:57:10,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:57:10,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:57:10,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265750751] [2022-03-20 21:57:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:57:10,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:57:10,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:57:10,832 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:57:10,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 21:57:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 21:57:10,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 21:57:10,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:57:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:57:10,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:57:10,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:57:10,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460703710] [2022-03-20 21:57:10,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:57:10,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265750751] [2022-03-20 21:57:10,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265750751] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:57:10,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:57:10,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:57:14,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:57:14,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1891654558] [2022-03-20 21:57:14,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1891654558] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:57:14,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:57:14,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 21:57:14,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286893119] [2022-03-20 21:57:14,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:57:14,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 21:57:14,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:57:14,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 21:57:14,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-03-20 21:57:14,413 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) [2022-03-20 21:57:14,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:57:14,538 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2022-03-20 21:57:14,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 21:57:14,538 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 [2022-03-20 21:57:14,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:57:14,539 INFO L225 Difference]: With dead ends: 82 [2022-03-20 21:57:14,539 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 21:57:14,551 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-03-20 21:57:14,552 INFO L913 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 [2022-03-20 21:57:14,552 INFO L914 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] [2022-03-20 21:57:14,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 21:57:14,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 21:57:14,552 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) [2022-03-20 21:57:14,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 21:57:14,552 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 58 [2022-03-20 21:57:14,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:57:14,553 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 21:57:14,553 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) [2022-03-20 21:57:14,553 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 21:57:14,553 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 21:57:14,556 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 21:57:14,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 21:57:14,771 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 [2022-03-20 21:57:14,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 21:57:16,235 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-03-20 21:57:16,236 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-03-20 21:57:16,236 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-03-20 21:57:16,236 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2022-03-20 21:57:16,236 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-03-20 21:57:16,236 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-03-20 21:57:16,236 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-03-20 21:57:16,236 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))) [2022-03-20 21:57:16,236 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 23 61) the Hoare annotation is: true [2022-03-20 21:57:16,236 INFO L878 garLoopResultBuilder]: At program point L52(lines 52 55) the Hoare annotation is: (not (<= |old(~counter~0)| 0)) [2022-03-20 21:57:16,236 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))) [2022-03-20 21:57:16,236 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))) [2022-03-20 21:57:16,236 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 23 61) the Hoare annotation is: true [2022-03-20 21:57:16,236 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))) [2022-03-20 21:57:16,236 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))) [2022-03-20 21:57:16,236 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))) [2022-03-20 21:57:16,236 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))) [2022-03-20 21:57:16,237 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)))) [2022-03-20 21:57:16,237 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))) [2022-03-20 21:57:16,237 INFO L885 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: true [2022-03-20 21:57:16,237 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))) [2022-03-20 21:57:16,237 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))) [2022-03-20 21:57:16,237 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))) [2022-03-20 21:57:16,237 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))) [2022-03-20 21:57:16,237 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))) [2022-03-20 21:57:16,237 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-03-20 21:57:16,237 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|)) [2022-03-20 21:57:16,237 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-03-20 21:57:16,237 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-03-20 21:57:16,237 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-03-20 21:57:16,237 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 21:57:16,237 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-03-20 21:57:16,237 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 21:57:16,237 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))))) [2022-03-20 21:57:16,237 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-03-20 21:57:16,237 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))))) [2022-03-20 21:57:16,238 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))))) [2022-03-20 21:57:16,238 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-03-20 21:57:16,240 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-03-20 21:57:16,241 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 21:57:16,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 09:57:16 BoogieIcfgContainer [2022-03-20 21:57:16,251 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 21:57:16,252 INFO L158 Benchmark]: Toolchain (without parser) took 186169.89ms. Allocated memory was 183.5MB in the beginning and 245.4MB in the end (delta: 61.9MB). Free memory was 133.8MB in the beginning and 146.2MB in the end (delta: -12.4MB). Peak memory consumption was 49.9MB. Max. memory is 8.0GB. [2022-03-20 21:57:16,252 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 183.5MB. Free memory was 150.5MB in the beginning and 150.4MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 21:57:16,252 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.73ms. Allocated memory is still 183.5MB. Free memory was 133.6MB in the beginning and 159.0MB in the end (delta: -25.4MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. [2022-03-20 21:57:16,252 INFO L158 Benchmark]: Boogie Preprocessor took 29.30ms. Allocated memory is still 183.5MB. Free memory was 158.5MB in the beginning and 157.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 21:57:16,252 INFO L158 Benchmark]: RCFGBuilder took 248.14ms. Allocated memory is still 183.5MB. Free memory was 157.5MB in the beginning and 146.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 21:57:16,253 INFO L158 Benchmark]: TraceAbstraction took 185706.45ms. Allocated memory was 183.5MB in the beginning and 245.4MB in the end (delta: 61.9MB). Free memory was 146.0MB in the beginning and 146.2MB in the end (delta: -203.3kB). Peak memory consumption was 62.2MB. Max. memory is 8.0GB. [2022-03-20 21:57:16,253 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 183.5MB. Free memory was 150.5MB in the beginning and 150.4MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 177.73ms. Allocated memory is still 183.5MB. Free memory was 133.6MB in the beginning and 159.0MB in the end (delta: -25.4MB). Peak memory consumption was 10.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.30ms. Allocated memory is still 183.5MB. Free memory was 158.5MB in the beginning and 157.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 248.14ms. Allocated memory is still 183.5MB. Free memory was 157.5MB in the beginning and 146.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 185706.45ms. Allocated memory was 183.5MB in the beginning and 245.4MB in the end (delta: 61.9MB). Free memory was 146.0MB in the beginning and 146.2MB in the end (delta: -203.3kB). Peak memory consumption was 62.2MB. 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: 185.7s, OverallIterations: 11, TraceHistogramMax: 9, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 225 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 201 mSDsluCounter, 1458 SdHoareTripleChecker+Invalid, 1.1s 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, 1113 ImplicationChecksByTransitivity, 5.3s 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, 0.0s HoareSimplificationTime, 31 FomulaSimplificationsInter, 790 FormulaSimplificationTreeSizeReductionInter, 1.4s 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! [2022-03-20 21:57:16,274 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...