/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/hard-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 23:01:54,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 23:01:54,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 23:01:54,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 23:01:54,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 23:01:54,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 23:01:54,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 23:01:54,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 23:01:54,757 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 23:01:54,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 23:01:54,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 23:01:54,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 23:01:54,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 23:01:54,759 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 23:01:54,759 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 23:01:54,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 23:01:54,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 23:01:54,760 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 23:01:54,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 23:01:54,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 23:01:54,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 23:01:54,760 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 23:01:54,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 23:01:54,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 23:01:54,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 23:01:54,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 23:01:54,761 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 23:01:54,761 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 23:01:54,761 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 23:01:54,761 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 23:01:54,761 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 23:01:54,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 23:01:54,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 23:01:54,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 23:01:54,935 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 23:01:54,936 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 23:01:54,937 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c [2022-04-06 23:01:54,986 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e091ff0/06c273002b394d62ac6d6be62b385d40/FLAG4836a1ba3 [2022-04-06 23:01:55,324 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 23:01:55,324 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c [2022-04-06 23:01:55,331 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e091ff0/06c273002b394d62ac6d6be62b385d40/FLAG4836a1ba3 [2022-04-06 23:01:55,753 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6e091ff0/06c273002b394d62ac6d6be62b385d40 [2022-04-06 23:01:55,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 23:01:55,757 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 23:01:55,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 23:01:55,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 23:01:55,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 23:01:55,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:01:55" (1/1) ... [2022-04-06 23:01:55,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@740e4728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:01:55, skipping insertion in model container [2022-04-06 23:01:55,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 11:01:55" (1/1) ... [2022-04-06 23:01:55,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 23:01:55,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 23:01:55,915 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/hard-ll_valuebound5.c[538,551] [2022-04-06 23:01:55,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 23:01:55,945 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 23:01:55,954 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/hard-ll_valuebound5.c[538,551] [2022-04-06 23:01:55,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 23:01:55,977 INFO L208 MainTranslator]: Completed translation [2022-04-06 23:01:55,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:01:55 WrapperNode [2022-04-06 23:01:55,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 23:01:55,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 23:01:55,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 23:01:55,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 23:01:55,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:01:55" (1/1) ... [2022-04-06 23:01:55,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:01:55" (1/1) ... [2022-04-06 23:01:55,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:01:55" (1/1) ... [2022-04-06 23:01:55,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:01:55" (1/1) ... [2022-04-06 23:01:55,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:01:55" (1/1) ... [2022-04-06 23:01:55,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:01:55" (1/1) ... [2022-04-06 23:01:55,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:01:55" (1/1) ... [2022-04-06 23:01:55,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 23:01:55,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 23:01:55,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 23:01:55,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 23:01:56,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:01:55" (1/1) ... [2022-04-06 23:01:56,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 23:01:56,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:56,022 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) [2022-04-06 23:01:56,027 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 [2022-04-06 23:01:56,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 23:01:56,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 23:01:56,057 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 23:01:56,057 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 23:01:56,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 23:01:56,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 23:01:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 23:01:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 23:01:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 23:01:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 23:01:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-06 23:01:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 23:01:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 23:01:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 23:01:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 23:01:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 23:01:56,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 23:01:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 23:01:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 23:01:56,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 23:01:56,111 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 23:01:56,112 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 23:01:56,249 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 23:01:56,253 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 23:01:56,253 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 23:01:56,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:01:56 BoogieIcfgContainer [2022-04-06 23:01:56,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 23:01:56,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 23:01:56,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 23:01:56,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 23:01:56,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 11:01:55" (1/3) ... [2022-04-06 23:01:56,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12793605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:01:56, skipping insertion in model container [2022-04-06 23:01:56,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 11:01:55" (2/3) ... [2022-04-06 23:01:56,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12793605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 11:01:56, skipping insertion in model container [2022-04-06 23:01:56,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 11:01:56" (3/3) ... [2022-04-06 23:01:56,286 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound5.c [2022-04-06 23:01:56,289 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 23:01:56,289 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 23:01:56,318 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 23:01:56,323 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 [2022-04-06 23:01:56,323 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 23:01:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 23:01:56,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 23:01:56,349 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:56,349 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:56,350 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:56,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:56,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-04-06 23:01:56,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:56,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [546547631] [2022-04-06 23:01:56,370 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:01:56,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 2 times [2022-04-06 23:01:56,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:56,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501935410] [2022-04-06 23:01:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:56,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:01:56,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:01:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:01:56,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 23:01:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:01:56,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 23:01:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:01:56,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 23:01:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:01:56,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 23:01:56,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:56,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501935410] [2022-04-06 23:01:56,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501935410] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:56,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:56,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 23:01:56,571 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:56,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [546547631] [2022-04-06 23:01:56,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [546547631] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:56,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:56,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 23:01:56,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640110528] [2022-04-06 23:01:56,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:56,576 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 23:01:56,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:56,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 23:01:56,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 23:01:56,599 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 23:01:56,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:56,687 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-04-06 23:01:56,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 23:01:56,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 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 28 [2022-04-06 23:01:56,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:56,697 INFO L225 Difference]: With dead ends: 69 [2022-04-06 23:01:56,697 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 23:01:56,700 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 23:01:56,703 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:56,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:01:56,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 23:01:56,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 23:01:56,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 23:01:56,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-04-06 23:01:56,744 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-04-06 23:01:56,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:56,744 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-04-06 23:01:56,745 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 23:01:56,745 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-04-06 23:01:56,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 23:01:56,746 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:56,746 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:56,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 23:01:56,747 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:56,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:56,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-04-06 23:01:56,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:56,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [573784029] [2022-04-06 23:01:56,749 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:01:56,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 2 times [2022-04-06 23:01:56,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:56,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316780086] [2022-04-06 23:01:56,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:56,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:01:56,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:01:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:01:56,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 23:01:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:01:56,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 23:01:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:01:56,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 23:01:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:01:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 23:01:56,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:56,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316780086] [2022-04-06 23:01:56,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316780086] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:56,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:56,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:01:56,835 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:56,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [573784029] [2022-04-06 23:01:56,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [573784029] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:56,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:56,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:01:56,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272880619] [2022-04-06 23:01:56,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:56,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:01:56,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:56,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:01:56,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:01:56,837 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 23:01:57,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:57,028 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-04-06 23:01:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 23:01:57,028 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-04-06 23:01:57,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:57,030 INFO L225 Difference]: With dead ends: 46 [2022-04-06 23:01:57,030 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 23:01:57,031 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:01:57,032 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:57,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:01:57,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 23:01:57,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-04-06 23:01:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 23:01:57,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-04-06 23:01:57,048 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-04-06 23:01:57,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:57,048 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-04-06 23:01:57,048 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-06 23:01:57,048 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-04-06 23:01:57,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 23:01:57,049 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:57,049 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:57,049 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 23:01:57,049 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:57,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:57,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-04-06 23:01:57,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:57,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [906516269] [2022-04-06 23:01:57,050 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:01:57,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 2 times [2022-04-06 23:01:57,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:57,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95390622] [2022-04-06 23:01:57,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:57,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:01:57,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 23:01:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:01:57,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 23:01:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:01:57,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 23:01:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:01:57,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 23:01:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:01:57,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 23:01:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 23:01:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 23:01:57,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:57,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95390622] [2022-04-06 23:01:57,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95390622] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:57,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:57,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:01:57,121 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:57,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [906516269] [2022-04-06 23:01:57,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [906516269] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:57,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:57,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:01:57,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212946294] [2022-04-06 23:01:57,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:57,122 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:01:57,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:57,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:01:57,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:01:57,123 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 23:01:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:57,293 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-04-06 23:01:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 23:01:57,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-06 23:01:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:57,294 INFO L225 Difference]: With dead ends: 50 [2022-04-06 23:01:57,295 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 23:01:57,295 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:01:57,296 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:57,296 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:01:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 23:01:57,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-04-06 23:01:57,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 23:01:57,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-04-06 23:01:57,304 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-04-06 23:01:57,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:57,304 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-04-06 23:01:57,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 23:01:57,304 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-04-06 23:01:57,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 23:01:57,305 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:57,305 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:57,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 23:01:57,305 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:57,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:57,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-04-06 23:01:57,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:57,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1140969962] [2022-04-06 23:01:57,306 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:01:57,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 2 times [2022-04-06 23:01:57,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:57,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173877758] [2022-04-06 23:01:57,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:57,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:57,316 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:57,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436922700] [2022-04-06 23:01:57,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:01:57,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:57,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:57,318 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) [2022-04-06 23:01:57,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 23:01:57,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:01:57,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:57,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 23:01:57,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 23:01:57,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:01:57,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:57,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173877758] [2022-04-06 23:01:57,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:57,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436922700] [2022-04-06 23:01:57,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436922700] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:57,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:57,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:01:57,498 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:57,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1140969962] [2022-04-06 23:01:57,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1140969962] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:57,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:57,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:01:57,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732608754] [2022-04-06 23:01:57,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:57,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:01:57,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:57,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:01:57,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:01:57,508 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 23:01:57,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:57,572 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-04-06 23:01:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:01:57,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-04-06 23:01:57,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:57,573 INFO L225 Difference]: With dead ends: 69 [2022-04-06 23:01:57,573 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 23:01:57,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:01:57,574 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:57,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 145 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:01:57,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 23:01:57,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-06 23:01:57,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 23:01:57,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-04-06 23:01:57,584 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-04-06 23:01:57,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:57,584 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-04-06 23:01:57,584 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 23:01:57,584 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-04-06 23:01:57,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 23:01:57,585 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:57,585 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:57,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 23:01:57,791 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:57,792 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:57,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:57,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-04-06 23:01:57,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:57,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [748309468] [2022-04-06 23:01:57,793 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:01:57,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 2 times [2022-04-06 23:01:57,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:57,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206181983] [2022-04-06 23:01:57,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:57,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:57,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:57,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449663054] [2022-04-06 23:01:57,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:01:57,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:57,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:57,804 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) [2022-04-06 23:01:57,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 23:01:57,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:01:57,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:57,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 23:01:57,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-06 23:01:58,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:01:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 23:01:58,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:58,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206181983] [2022-04-06 23:01:58,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:58,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449663054] [2022-04-06 23:01:58,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449663054] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 23:01:58,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 23:01:58,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-04-06 23:01:58,285 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:58,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [748309468] [2022-04-06 23:01:58,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [748309468] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:58,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:58,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 23:01:58,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858852543] [2022-04-06 23:01:58,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:58,286 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 23:01:58,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:58,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 23:01:58,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-06 23:01:58,286 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 23:01:58,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:58,369 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-04-06 23:01:58,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:01:58,369 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-04-06 23:01:58,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:58,372 INFO L225 Difference]: With dead ends: 68 [2022-04-06 23:01:58,372 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 23:01:58,373 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-06 23:01:58,376 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:58,378 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 151 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:01:58,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 23:01:58,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-04-06 23:01:58,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 23:01:58,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-04-06 23:01:58,397 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-04-06 23:01:58,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:58,398 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-04-06 23:01:58,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 23:01:58,398 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-04-06 23:01:58,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 23:01:58,399 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:58,399 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:58,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 23:01:58,615 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:58,617 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:58,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-04-06 23:01:58,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:58,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [820486950] [2022-04-06 23:01:58,618 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:01:58,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 2 times [2022-04-06 23:01:58,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:58,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597376158] [2022-04-06 23:01:58,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:58,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:58,640 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:58,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757525240] [2022-04-06 23:01:58,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:01:58,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:58,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:58,642 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) [2022-04-06 23:01:58,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 23:01:58,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:01:58,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:58,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 23:01:58,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:58,914 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 23:01:58,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:01:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 23:01:59,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:59,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597376158] [2022-04-06 23:01:59,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:59,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757525240] [2022-04-06 23:01:59,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757525240] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 23:01:59,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 23:01:59,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-04-06 23:01:59,013 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:59,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [820486950] [2022-04-06 23:01:59,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [820486950] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:59,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:59,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:01:59,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722284824] [2022-04-06 23:01:59,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:59,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:01:59,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:59,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:01:59,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 23:01:59,015 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 23:01:59,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:59,365 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-04-06 23:01:59,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:01:59,365 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-04-06 23:01:59,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:59,366 INFO L225 Difference]: With dead ends: 76 [2022-04-06 23:01:59,366 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 23:01:59,366 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 23:01:59,367 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:59,367 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 129 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 23:01:59,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 23:01:59,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-04-06 23:01:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 23:01:59,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-04-06 23:01:59,377 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-04-06 23:01:59,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:59,378 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-04-06 23:01:59,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 23:01:59,378 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-04-06 23:01:59,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 23:01:59,379 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:59,379 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:59,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 23:01:59,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:59,592 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:01:59,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:01:59,592 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-04-06 23:01:59,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:59,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1988187687] [2022-04-06 23:01:59,592 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:01:59,593 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 2 times [2022-04-06 23:01:59,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:01:59,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229150688] [2022-04-06 23:01:59,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:01:59,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:01:59,603 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:01:59,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423789072] [2022-04-06 23:01:59,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:01:59,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:01:59,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:01:59,604 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) [2022-04-06 23:01:59,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 23:01:59,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:01:59,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:01:59,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 23:01:59,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:01:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 23:01:59,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 23:01:59,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:01:59,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229150688] [2022-04-06 23:01:59,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:01:59,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423789072] [2022-04-06 23:01:59,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423789072] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:59,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:59,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:01:59,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:01:59,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1988187687] [2022-04-06 23:01:59,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1988187687] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:01:59,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:01:59,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 23:01:59,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35234513] [2022-04-06 23:01:59,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:01:59,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 23:01:59,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:01:59,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 23:01:59,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 23:01:59,748 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 23:01:59,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:01:59,801 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-04-06 23:01:59,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 23:01:59,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-04-06 23:01:59,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:01:59,805 INFO L225 Difference]: With dead ends: 79 [2022-04-06 23:01:59,805 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 23:01:59,805 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 23:01:59,806 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 23:01:59,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 123 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 23:01:59,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 23:01:59,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-04-06 23:01:59,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 23:01:59,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-04-06 23:01:59,824 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-04-06 23:01:59,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:01:59,824 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-04-06 23:01:59,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 23:01:59,824 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-04-06 23:01:59,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 23:01:59,830 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:01:59,830 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:01:59,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 23:02:00,039 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:02:00,039 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:02:00,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:02:00,040 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2022-04-06 23:02:00,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:02:00,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2117330394] [2022-04-06 23:02:00,040 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:02:00,040 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 2 times [2022-04-06 23:02:00,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:02:00,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146980426] [2022-04-06 23:02:00,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:02:00,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:02:00,051 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:02:00,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727497624] [2022-04-06 23:02:00,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:02:00,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:02:00,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:02:00,052 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) [2022-04-06 23:02:00,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 23:02:00,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:02:00,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:02:00,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 23:02:00,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:02:00,673 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-04-06 23:02:00,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:02:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-04-06 23:02:04,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:02:04,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146980426] [2022-04-06 23:02:04,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:02:04,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727497624] [2022-04-06 23:02:04,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727497624] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:02:04,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:02:04,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 23:02:04,992 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:02:04,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2117330394] [2022-04-06 23:02:04,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2117330394] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:02:04,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:02:04,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 23:02:04,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422048443] [2022-04-06 23:02:04,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:02:04,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 23:02:04,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:02:04,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 23:02:04,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-06 23:02:04,993 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 23:02:05,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:02:05,296 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2022-04-06 23:02:05,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 23:02:05,297 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2022-04-06 23:02:05,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:02:05,298 INFO L225 Difference]: With dead ends: 135 [2022-04-06 23:02:05,298 INFO L226 Difference]: Without dead ends: 108 [2022-04-06 23:02:05,299 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-04-06 23:02:05,299 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:02:05,299 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 234 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:02:05,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-04-06 23:02:05,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-04-06 23:02:05,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.140625) internal successors, (73), 67 states have internal predecessors, (73), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 23:02:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2022-04-06 23:02:05,331 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 75 [2022-04-06 23:02:05,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:02:05,331 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2022-04-06 23:02:05,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 23:02:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2022-04-06 23:02:05,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 23:02:05,332 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:02:05,332 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:02:05,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 23:02:05,537 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:02:05,537 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:02:05,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:02:05,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 3 times [2022-04-06 23:02:05,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:02:05,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [963099688] [2022-04-06 23:02:05,538 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:02:05,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 4 times [2022-04-06 23:02:05,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:02:05,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722137961] [2022-04-06 23:02:05,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:02:05,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:02:05,554 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:02:05,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948036725] [2022-04-06 23:02:05,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:02:05,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:02:05,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:02:05,556 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) [2022-04-06 23:02:05,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 23:02:05,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:02:05,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:02:05,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 23:02:05,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:02:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-04-06 23:02:05,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:02:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-04-06 23:02:07,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:02:07,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722137961] [2022-04-06 23:02:07,982 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:02:07,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948036725] [2022-04-06 23:02:07,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948036725] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:02:07,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:02:07,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-04-06 23:02:07,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:02:07,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [963099688] [2022-04-06 23:02:07,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [963099688] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:02:07,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:02:07,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 23:02:07,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276215823] [2022-04-06 23:02:07,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:02:07,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 23:02:07,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:02:07,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 23:02:07,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 23:02:07,983 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 23:02:08,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:02:08,111 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2022-04-06 23:02:08,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 23:02:08,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2022-04-06 23:02:08,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:02:08,113 INFO L225 Difference]: With dead ends: 133 [2022-04-06 23:02:08,113 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 23:02:08,113 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-04-06 23:02:08,114 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 23:02:08,114 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 222 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 23:02:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 23:02:08,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-04-06 23:02:08,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.106060606060606) internal successors, (73), 70 states have internal predecessors, (73), 28 states have call successors, (28), 16 states have call predecessors, (28), 15 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 23:02:08,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2022-04-06 23:02:08,123 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 80 [2022-04-06 23:02:08,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:02:08,124 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2022-04-06 23:02:08,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 23:02:08,124 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2022-04-06 23:02:08,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 23:02:08,124 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:02:08,125 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:02:08,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 23:02:08,325 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:02:08,325 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:02:08,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:02:08,326 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2022-04-06 23:02:08,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:02:08,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [550205072] [2022-04-06 23:02:08,326 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:02:08,326 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 2 times [2022-04-06 23:02:08,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:02:08,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468464669] [2022-04-06 23:02:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:02:08,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:02:08,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:02:08,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724555250] [2022-04-06 23:02:08,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:02:08,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:02:08,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:02:08,336 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) [2022-04-06 23:02:08,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 23:02:08,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:02:08,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:02:08,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 23:02:08,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:02:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 23:02:09,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:02:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 23:02:22,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:02:22,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468464669] [2022-04-06 23:02:22,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:02:22,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724555250] [2022-04-06 23:02:22,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724555250] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:02:22,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:02:22,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-04-06 23:02:22,562 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:02:22,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [550205072] [2022-04-06 23:02:22,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [550205072] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:02:22,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:02:22,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 23:02:22,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918177070] [2022-04-06 23:02:22,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:02:22,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 23:02:22,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:02:22,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 23:02:22,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-04-06 23:02:22,563 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 23:02:24,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:02:24,036 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2022-04-06 23:02:24,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 23:02:24,037 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2022-04-06 23:02:24,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:02:24,038 INFO L225 Difference]: With dead ends: 116 [2022-04-06 23:02:24,038 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 23:02:24,038 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-04-06 23:02:24,039 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 23:02:24,039 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 230 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 23:02:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 23:02:24,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-04-06 23:02:24,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 23:02:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2022-04-06 23:02:24,057 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 86 [2022-04-06 23:02:24,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:02:24,057 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2022-04-06 23:02:24,058 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-04-06 23:02:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2022-04-06 23:02:24,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 23:02:24,058 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:02:24,058 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:02:24,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 23:02:24,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:02:24,272 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:02:24,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:02:24,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 5 times [2022-04-06 23:02:24,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:02:24,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1879596975] [2022-04-06 23:02:24,272 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:02:24,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 6 times [2022-04-06 23:02:24,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:02:24,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512318976] [2022-04-06 23:02:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:02:24,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:02:24,281 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:02:24,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96093469] [2022-04-06 23:02:24,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:02:24,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:02:24,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:02:24,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:02:24,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 23:02:24,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 23:02:24,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:02:24,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 23:02:24,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:02:36,894 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 23:02:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-04-06 23:02:37,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:03:29,896 WARN L232 SmtUtils]: Spent 29.66s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 23:04:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-04-06 23:04:27,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:04:27,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512318976] [2022-04-06 23:04:27,455 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:04:27,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96093469] [2022-04-06 23:04:27,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96093469] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:04:27,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:04:27,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2022-04-06 23:04:27,455 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:04:27,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1879596975] [2022-04-06 23:04:27,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1879596975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:04:27,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:04:27,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 23:04:27,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234038338] [2022-04-06 23:04:27,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:04:27,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 23:04:27,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:04:27,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 23:04:27,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-04-06 23:04:27,457 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 23:04:32,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:04:32,024 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-04-06 23:04:32,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 23:04:32,025 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2022-04-06 23:04:32,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:04:32,026 INFO L225 Difference]: With dead ends: 112 [2022-04-06 23:04:32,026 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 23:04:32,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=59, Invalid=211, Unknown=2, NotChecked=0, Total=272 [2022-04-06 23:04:32,026 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 23:04:32,027 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 191 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 23:04:32,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 23:04:32,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-04-06 23:04:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.11864406779661) internal successors, (66), 63 states have internal predecessors, (66), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 23:04:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2022-04-06 23:04:32,035 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 92 [2022-04-06 23:04:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:04:32,035 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2022-04-06 23:04:32,035 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 23:04:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2022-04-06 23:04:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 23:04:32,036 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:04:32,036 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:04:32,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 23:04:32,253 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 23:04:32,253 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:04:32,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:04:32,254 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 7 times [2022-04-06 23:04:32,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:04:32,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [654916224] [2022-04-06 23:04:32,254 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:04:32,254 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 8 times [2022-04-06 23:04:32,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:04:32,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338273765] [2022-04-06 23:04:32,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:04:32,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:04:32,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:04:32,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427529263] [2022-04-06 23:04:32,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:04:32,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:04:32,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:04:32,284 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:04:32,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 23:04:32,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:04:32,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:04:32,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 23:04:32,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:04:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 23:04:32,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:04:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 23:04:35,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:04:35,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338273765] [2022-04-06 23:04:35,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:04:35,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427529263] [2022-04-06 23:04:35,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427529263] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:04:35,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:04:35,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 23:04:35,367 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:04:35,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [654916224] [2022-04-06 23:04:35,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [654916224] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:04:35,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:04:35,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 23:04:35,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294875107] [2022-04-06 23:04:35,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:04:35,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 23:04:35,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:04:35,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 23:04:35,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-04-06 23:04:35,370 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 23:04:35,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:04:35,740 INFO L93 Difference]: Finished difference Result 177 states and 223 transitions. [2022-04-06 23:04:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 23:04:35,740 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2022-04-06 23:04:35,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:04:35,741 INFO L225 Difference]: With dead ends: 177 [2022-04-06 23:04:35,741 INFO L226 Difference]: Without dead ends: 138 [2022-04-06 23:04:35,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-04-06 23:04:35,743 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 23:04:35,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 306 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 23:04:35,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-04-06 23:04:35,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-04-06 23:04:35,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 88 states have internal predecessors, (92), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2022-04-06 23:04:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 167 transitions. [2022-04-06 23:04:35,757 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 167 transitions. Word has length 97 [2022-04-06 23:04:35,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:04:35,757 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 167 transitions. [2022-04-06 23:04:35,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 23:04:35,757 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 167 transitions. [2022-04-06 23:04:35,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 23:04:35,758 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:04:35,758 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:04:35,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 23:04:35,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:04:35,975 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:04:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:04:35,976 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 9 times [2022-04-06 23:04:35,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:04:35,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1301005971] [2022-04-06 23:04:35,976 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:04:35,976 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 10 times [2022-04-06 23:04:35,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:04:35,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036047901] [2022-04-06 23:04:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:04:35,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:04:35,982 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:04:35,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934804715] [2022-04-06 23:04:35,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:04:35,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:04:35,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:04:35,983 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:04:35,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 23:04:36,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:04:36,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:04:36,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 23:04:36,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:04:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-04-06 23:04:36,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:04:55,865 WARN L232 SmtUtils]: Spent 5.33s on a formula simplification that was a NOOP. DAG size: 152 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 23:05:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-04-06 23:05:26,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:05:26,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036047901] [2022-04-06 23:05:26,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:05:26,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934804715] [2022-04-06 23:05:26,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934804715] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:05:26,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:05:26,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2022-04-06 23:05:26,838 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:05:26,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1301005971] [2022-04-06 23:05:26,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1301005971] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:05:26,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:05:26,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 23:05:26,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634546334] [2022-04-06 23:05:26,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:05:26,839 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 23:05:26,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:05:26,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 23:05:26,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-04-06 23:05:26,839 INFO L87 Difference]: Start difference. First operand 138 states and 167 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-04-06 23:05:27,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:05:27,736 INFO L93 Difference]: Finished difference Result 184 states and 208 transitions. [2022-04-06 23:05:27,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 23:05:27,737 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 105 [2022-04-06 23:05:27,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:05:27,738 INFO L225 Difference]: With dead ends: 184 [2022-04-06 23:05:27,738 INFO L226 Difference]: Without dead ends: 151 [2022-04-06 23:05:27,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-04-06 23:05:27,738 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 25 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 23:05:27,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 275 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 23:05:27,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-04-06 23:05:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-04-06 23:05:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 93 states have (on average 1.086021505376344) internal successors, (101), 98 states have internal predecessors, (101), 36 states have call successors, (36), 22 states have call predecessors, (36), 21 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 23:05:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 170 transitions. [2022-04-06 23:05:27,751 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 170 transitions. Word has length 105 [2022-04-06 23:05:27,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:05:27,751 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 170 transitions. [2022-04-06 23:05:27,752 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-04-06 23:05:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 170 transitions. [2022-04-06 23:05:27,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-04-06 23:05:27,753 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:05:27,753 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:05:27,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 23:05:27,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 23:05:27,964 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:05:27,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:05:27,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 11 times [2022-04-06 23:05:27,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:05:27,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [890277959] [2022-04-06 23:05:27,964 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:05:27,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 12 times [2022-04-06 23:05:27,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:05:27,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170768956] [2022-04-06 23:05:27,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:05:27,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:05:27,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:05:27,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936035972] [2022-04-06 23:05:27,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 23:05:27,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:05:27,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:05:27,971 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:05:27,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 23:05:28,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 23:05:28,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:05:28,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 23:05:28,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:05:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 96 proven. 4 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2022-04-06 23:05:28,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:05:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 71 proven. 4 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 23:05:29,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:05:29,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170768956] [2022-04-06 23:05:29,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:05:29,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936035972] [2022-04-06 23:05:29,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936035972] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 23:05:29,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 23:05:29,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-04-06 23:05:29,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:05:29,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [890277959] [2022-04-06 23:05:29,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [890277959] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:05:29,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:05:29,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 23:05:29,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696985166] [2022-04-06 23:05:29,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:05:29,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 23:05:29,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:05:29,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 23:05:29,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-04-06 23:05:29,855 INFO L87 Difference]: Start difference. First operand 151 states and 170 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-04-06 23:05:30,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:05:30,275 INFO L93 Difference]: Finished difference Result 172 states and 193 transitions. [2022-04-06 23:05:30,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 23:05:30,275 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 114 [2022-04-06 23:05:30,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:05:30,276 INFO L225 Difference]: With dead ends: 172 [2022-04-06 23:05:30,276 INFO L226 Difference]: Without dead ends: 160 [2022-04-06 23:05:30,277 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 200 SyntacticMatches, 14 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-04-06 23:05:30,277 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 20 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 23:05:30,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 227 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 306 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2022-04-06 23:05:30,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-06 23:05:30,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2022-04-06 23:05:30,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 103 states have internal predecessors, (106), 38 states have call successors, (38), 23 states have call predecessors, (38), 22 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 23:05:30,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 179 transitions. [2022-04-06 23:05:30,290 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 179 transitions. Word has length 114 [2022-04-06 23:05:30,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:05:30,290 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 179 transitions. [2022-04-06 23:05:30,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-04-06 23:05:30,290 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 179 transitions. [2022-04-06 23:05:30,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 23:05:30,291 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:05:30,291 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:05:30,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 23:05:30,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 23:05:30,508 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:05:30,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:05:30,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 3 times [2022-04-06 23:05:30,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:05:30,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [218995533] [2022-04-06 23:05:30,509 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:05:30,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 4 times [2022-04-06 23:05:30,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:05:30,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528089048] [2022-04-06 23:05:30,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:05:30,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:05:30,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:05:30,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542899424] [2022-04-06 23:05:30,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 23:05:30,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:05:30,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:05:30,516 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:05:30,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 23:05:30,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 23:05:30,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:05:30,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 23:05:30,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 23:05:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 40 proven. 24 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2022-04-06 23:05:31,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 23:05:41,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 23:05:41,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528089048] [2022-04-06 23:05:41,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 23:05:41,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542899424] [2022-04-06 23:05:41,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542899424] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 23:05:41,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 23:05:41,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 23:05:41,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 23:05:41,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [218995533] [2022-04-06 23:05:41,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [218995533] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 23:05:41,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 23:05:41,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 23:05:41,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148158305] [2022-04-06 23:05:41,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 23:05:41,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 23:05:41,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 23:05:41,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 23:05:41,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-04-06 23:05:41,978 INFO L87 Difference]: Start difference. First operand 159 states and 179 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 23:05:43,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 23:05:43,759 INFO L93 Difference]: Finished difference Result 200 states and 233 transitions. [2022-04-06 23:05:43,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 23:05:43,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 116 [2022-04-06 23:05:43,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 23:05:43,761 INFO L225 Difference]: With dead ends: 200 [2022-04-06 23:05:43,761 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 23:05:43,761 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2022-04-06 23:05:43,762 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 23 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 23:05:43,762 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 288 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 23:05:43,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 23:05:43,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 121. [2022-04-06 23:05:43,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 77 states have internal predecessors, (80), 29 states have call successors, (29), 18 states have call predecessors, (29), 17 states have return successors, (27), 25 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 23:05:43,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 136 transitions. [2022-04-06 23:05:43,773 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 136 transitions. Word has length 116 [2022-04-06 23:05:43,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 23:05:43,774 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 136 transitions. [2022-04-06 23:05:43,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 23:05:43,774 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 136 transitions. [2022-04-06 23:05:43,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 23:05:43,774 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 23:05:43,774 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 23:05:43,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 23:05:43,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 23:05:43,992 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 23:05:43,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 23:05:43,992 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 13 times [2022-04-06 23:05:43,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 23:05:43,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2146198452] [2022-04-06 23:05:43,993 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 23:05:43,993 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 14 times [2022-04-06 23:05:43,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 23:05:43,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439658041] [2022-04-06 23:05:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 23:05:43,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 23:05:44,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 23:05:44,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143973639] [2022-04-06 23:05:44,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 23:05:44,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 23:05:44,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 23:05:44,003 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 23:05:44,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 23:05:44,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 23:05:44,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 23:05:44,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 23:05:44,057 INFO L286 TraceCheckSpWp]: Computing forward predicates...