/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 03:30:35,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 03:30:35,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 03:30:35,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 03:30:35,794 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 03:30:35,801 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 03:30:35,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 03:30:35,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 03:30:35,802 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 03:30:35,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 03:30:35,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 03:30:35,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 03:30:35,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 03:30:35,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 03:30:35,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 03:30:35,803 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 03:30:35,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 03:30:35,803 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 03:30:35,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 03:30:35,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 03:30:35,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 03:30:35,804 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 03:30:35,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 03:30:35,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 03:30:35,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 03:30:35,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 03:30:35,804 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 03:30:35,804 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 03:30:35,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 03:30:35,805 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 03:30:35,805 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 03:30:35,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 03:30:35,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 03:30:35,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 03:30:35,984 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 03:30:35,984 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 03:30:35,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c [2022-03-19 03:30:36,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8829b156/dae1ff52e83a475bb310e6bf74652111/FLAG0f021d455 [2022-03-19 03:30:36,334 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 03:30:36,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound50.c [2022-03-19 03:30:36,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8829b156/dae1ff52e83a475bb310e6bf74652111/FLAG0f021d455 [2022-03-19 03:30:36,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8829b156/dae1ff52e83a475bb310e6bf74652111 [2022-03-19 03:30:36,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 03:30:36,760 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 03:30:36,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 03:30:36,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 03:30:36,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 03:30:36,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 03:30:36" (1/1) ... [2022-03-19 03:30:36,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6da533d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:30:36, skipping insertion in model container [2022-03-19 03:30:36,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 03:30:36" (1/1) ... [2022-03-19 03:30:36,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 03:30:36,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 03:30:36,908 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/bresenham-ll_unwindbound50.c[597,610] [2022-03-19 03:30:36,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 03:30:36,949 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 03:30:36,958 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/bresenham-ll_unwindbound50.c[597,610] [2022-03-19 03:30:36,979 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 03:30:36,987 INFO L208 MainTranslator]: Completed translation [2022-03-19 03:30:36,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:30:36 WrapperNode [2022-03-19 03:30:36,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 03:30:36,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 03:30:36,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 03:30:36,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 03:30:37,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:30:36" (1/1) ... [2022-03-19 03:30:37,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:30:36" (1/1) ... [2022-03-19 03:30:37,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:30:36" (1/1) ... [2022-03-19 03:30:37,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:30:36" (1/1) ... [2022-03-19 03:30:37,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:30:36" (1/1) ... [2022-03-19 03:30:37,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:30:36" (1/1) ... [2022-03-19 03:30:37,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:30:36" (1/1) ... [2022-03-19 03:30:37,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 03:30:37,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 03:30:37,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 03:30:37,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 03:30:37,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:30:36" (1/1) ... [2022-03-19 03:30:37,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 03:30:37,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:30:37,051 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 03:30:37,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 03:30:37,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 03:30:37,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 03:30:37,088 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 03:30:37,089 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 03:30:37,089 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 03:30:37,089 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 03:30:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 03:30:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 03:30:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 03:30:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 03:30:37,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 03:30:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 03:30:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 03:30:37,091 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 03:30:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 03:30:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 03:30:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 03:30:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 03:30:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 03:30:37,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 03:30:37,137 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 03:30:37,138 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 03:30:37,280 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 03:30:37,285 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 03:30:37,285 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 03:30:37,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 03:30:37 BoogieIcfgContainer [2022-03-19 03:30:37,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 03:30:37,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 03:30:37,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 03:30:37,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 03:30:37,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 03:30:36" (1/3) ... [2022-03-19 03:30:37,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48af156c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 03:30:37, skipping insertion in model container [2022-03-19 03:30:37,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 03:30:36" (2/3) ... [2022-03-19 03:30:37,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48af156c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 03:30:37, skipping insertion in model container [2022-03-19 03:30:37,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 03:30:37" (3/3) ... [2022-03-19 03:30:37,294 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound50.c [2022-03-19 03:30:37,298 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 03:30:37,298 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 03:30:37,332 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 03:30:37,350 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 03:30:37,350 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 03:30:37,367 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:30:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 03:30:37,383 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:30:37,383 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:30:37,384 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:30:37,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:30:37,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2019451875, now seen corresponding path program 1 times [2022-03-19 03:30:37,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:37,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [132623879] [2022-03-19 03:30:37,416 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:30:37,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2019451875, now seen corresponding path program 2 times [2022-03-19 03:30:37,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:30:37,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105355614] [2022-03-19 03:30:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:30:37,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:30:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:30:37,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 03:30:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 03:30:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:30:37,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:30:37,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105355614] [2022-03-19 03:30:37,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105355614] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:30:37,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:30:37,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 03:30:37,575 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:30:37,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [132623879] [2022-03-19 03:30:37,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [132623879] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:30:37,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:30:37,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 03:30:37,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703467086] [2022-03-19 03:30:37,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:30:37,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 03:30:37,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:37,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 03:30:37,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 03:30:37,601 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:30:37,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:30:37,659 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-03-19 03:30:37,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 03:30:37,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 03:30:37,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:30:37,666 INFO L225 Difference]: With dead ends: 45 [2022-03-19 03:30:37,666 INFO L226 Difference]: Without dead ends: 21 [2022-03-19 03:30:37,668 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 03:30:37,671 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:30:37,672 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 31 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:30:37,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-19 03:30:37,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-03-19 03:30:37,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 03:30:37,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-03-19 03:30:37,697 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-03-19 03:30:37,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:30:37,698 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-03-19 03:30:37,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:30:37,698 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-03-19 03:30:37,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-19 03:30:37,699 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:30:37,699 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:30:37,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 03:30:37,700 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:30:37,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:30:37,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1431109416, now seen corresponding path program 1 times [2022-03-19 03:30:37,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:37,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [697186490] [2022-03-19 03:30:37,703 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 03:30:37,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1431109416, now seen corresponding path program 2 times [2022-03-19 03:30:37,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:30:37,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954858185] [2022-03-19 03:30:37,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:30:37,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:30:37,730 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:30:37,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639391619] [2022-03-19 03:30:37,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:30:37,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:37,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:30:37,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:30:37,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 03:30:37,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 03:30:37,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:30:37,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 03:30:37,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:30:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:30:37,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 03:30:37,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:30:37,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954858185] [2022-03-19 03:30:37,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:30:37,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639391619] [2022-03-19 03:30:37,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639391619] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:30:37,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:30:37,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 03:30:37,960 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:30:37,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [697186490] [2022-03-19 03:30:37,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [697186490] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:30:37,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:30:37,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 03:30:37,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988808030] [2022-03-19 03:30:37,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:30:37,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 03:30:37,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:37,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 03:30:37,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 03:30:37,968 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:30:38,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:30:38,047 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-03-19 03:30:38,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 03:30:38,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-19 03:30:38,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:30:38,049 INFO L225 Difference]: With dead ends: 34 [2022-03-19 03:30:38,049 INFO L226 Difference]: Without dead ends: 29 [2022-03-19 03:30:38,050 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 03:30:38,050 INFO L912 BasicCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:30:38,051 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:30:38,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-19 03:30:38,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-03-19 03:30:38,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 03:30:38,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-03-19 03:30:38,057 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2022-03-19 03:30:38,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:30:38,057 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-03-19 03:30:38,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-19 03:30:38,058 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-03-19 03:30:38,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 03:30:38,058 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:30:38,058 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:30:38,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 03:30:38,272 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:38,272 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:30:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:30:38,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1603905768, now seen corresponding path program 1 times [2022-03-19 03:30:38,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:38,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2134308715] [2022-03-19 03:30:38,304 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:30:38,305 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:30:38,305 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:30:38,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1603905768, now seen corresponding path program 2 times [2022-03-19 03:30:38,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:30:38,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516740576] [2022-03-19 03:30:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:30:38,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:30:38,331 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:30:38,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281429295] [2022-03-19 03:30:38,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:30:38,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:38,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:30:38,339 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:30:38,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 03:30:38,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:30:38,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:30:38,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 03:30:38,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:30:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:30:38,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:30:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 03:30:38,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:30:38,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516740576] [2022-03-19 03:30:38,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:30:38,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281429295] [2022-03-19 03:30:38,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281429295] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:30:38,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:30:38,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-19 03:30:38,756 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:30:38,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2134308715] [2022-03-19 03:30:38,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2134308715] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:30:38,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:30:38,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 03:30:38,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351807138] [2022-03-19 03:30:38,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:30:38,757 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 03:30:38,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:38,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 03:30:38,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-19 03:30:38,758 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 03:30:38,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:30:38,866 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-03-19 03:30:38,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 03:30:38,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-03-19 03:30:38,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:30:38,867 INFO L225 Difference]: With dead ends: 44 [2022-03-19 03:30:38,867 INFO L226 Difference]: Without dead ends: 39 [2022-03-19 03:30:38,868 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-19 03:30:38,869 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:30:38,869 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 121 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:30:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-19 03:30:38,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-03-19 03:30:38,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:30:38,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-03-19 03:30:38,877 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2022-03-19 03:30:38,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:30:38,877 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-03-19 03:30:38,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 03:30:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-03-19 03:30:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-19 03:30:38,878 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:30:38,878 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:30:38,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 03:30:39,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 03:30:39,080 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:30:39,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:30:39,080 INFO L85 PathProgramCache]: Analyzing trace with hash 794559142, now seen corresponding path program 1 times [2022-03-19 03:30:39,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:39,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1722278389] [2022-03-19 03:30:39,084 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 6 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:30:39,084 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:30:39,084 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:30:39,084 INFO L85 PathProgramCache]: Analyzing trace with hash 794559142, now seen corresponding path program 2 times [2022-03-19 03:30:39,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:30:39,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014112080] [2022-03-19 03:30:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:30:39,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:30:39,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:30:39,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604322145] [2022-03-19 03:30:39,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:30:39,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:39,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:30:39,095 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:30:39,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 03:30:39,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:30:39,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:30:39,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 03:30:39,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:30:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:30:39,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:30:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-19 03:30:39,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:30:39,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014112080] [2022-03-19 03:30:39,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:30:39,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604322145] [2022-03-19 03:30:39,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604322145] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:30:39,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:30:39,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-03-19 03:30:39,448 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:30:39,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1722278389] [2022-03-19 03:30:39,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1722278389] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:30:39,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:30:39,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 03:30:39,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622268874] [2022-03-19 03:30:39,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:30:39,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 03:30:39,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:39,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 03:30:39,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-19 03:30:39,462 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 03:30:39,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:30:39,560 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2022-03-19 03:30:39,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 03:30:39,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-03-19 03:30:39,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:30:39,561 INFO L225 Difference]: With dead ends: 53 [2022-03-19 03:30:39,561 INFO L226 Difference]: Without dead ends: 51 [2022-03-19 03:30:39,562 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-19 03:30:39,562 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:30:39,563 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 126 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:30:39,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-19 03:30:39,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2022-03-19 03:30:39,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 03:30:39,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-03-19 03:30:39,569 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 22 [2022-03-19 03:30:39,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:30:39,570 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-03-19 03:30:39,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 03:30:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-03-19 03:30:39,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-19 03:30:39,570 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:30:39,570 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:30:39,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 03:30:39,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:39,787 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:30:39,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:30:39,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1213814707, now seen corresponding path program 1 times [2022-03-19 03:30:39,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:39,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [810973494] [2022-03-19 03:30:39,792 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 6 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:30:39,792 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:30:39,793 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:30:39,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1213814707, now seen corresponding path program 2 times [2022-03-19 03:30:39,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:30:39,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538814796] [2022-03-19 03:30:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:30:39,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:30:39,801 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:30:39,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804494836] [2022-03-19 03:30:39,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:30:39,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:39,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:30:39,803 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:30:39,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 03:30:39,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:30:39,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:30:39,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 03:30:39,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:30:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:30:39,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:30:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:30:39,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:30:39,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538814796] [2022-03-19 03:30:39,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:30:39,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804494836] [2022-03-19 03:30:39,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804494836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:30:39,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:30:39,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-19 03:30:39,968 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:30:39,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [810973494] [2022-03-19 03:30:39,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [810973494] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:30:39,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:30:39,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 03:30:39,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053357337] [2022-03-19 03:30:39,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:30:39,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 03:30:39,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:39,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 03:30:39,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-19 03:30:39,969 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 03:30:39,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:30:39,993 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2022-03-19 03:30:39,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 03:30:39,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-03-19 03:30:39,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:30:39,995 INFO L225 Difference]: With dead ends: 54 [2022-03-19 03:30:39,995 INFO L226 Difference]: Without dead ends: 46 [2022-03-19 03:30:39,995 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-19 03:30:39,996 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:30:39,996 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 74 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:30:39,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-19 03:30:40,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-19 03:30:40,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 03:30:40,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-03-19 03:30:40,006 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 23 [2022-03-19 03:30:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:30:40,006 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-03-19 03:30:40,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-19 03:30:40,006 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-03-19 03:30:40,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-19 03:30:40,007 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:30:40,007 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:30:40,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 03:30:40,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:40,220 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:30:40,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:30:40,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1132431350, now seen corresponding path program 1 times [2022-03-19 03:30:40,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:40,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [576704276] [2022-03-19 03:30:40,232 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 6 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:30:40,232 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:30:40,232 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:30:40,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1132431350, now seen corresponding path program 2 times [2022-03-19 03:30:40,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:30:40,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230393331] [2022-03-19 03:30:40,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:30:40,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:30:40,239 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:30:40,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956571475] [2022-03-19 03:30:40,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:30:40,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:40,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:30:40,248 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:30:40,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 03:30:40,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:30:40,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:30:40,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 03:30:40,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:30:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 03:30:40,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:30:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 03:30:40,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:30:40,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230393331] [2022-03-19 03:30:40,918 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:30:40,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956571475] [2022-03-19 03:30:40,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956571475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:30:40,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:30:40,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2022-03-19 03:30:40,919 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:30:40,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [576704276] [2022-03-19 03:30:40,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [576704276] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:30:40,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:30:40,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 03:30:40,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702428263] [2022-03-19 03:30:40,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:30:40,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 03:30:40,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:40,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 03:30:40,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-19 03:30:40,920 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 03:30:41,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:30:41,161 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-03-19 03:30:41,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 03:30:41,162 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-03-19 03:30:41,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:30:41,163 INFO L225 Difference]: With dead ends: 57 [2022-03-19 03:30:41,163 INFO L226 Difference]: Without dead ends: 49 [2022-03-19 03:30:41,163 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-03-19 03:30:41,164 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:30:41,164 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 158 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:30:41,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-19 03:30:41,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2022-03-19 03:30:41,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:30:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-03-19 03:30:41,171 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2022-03-19 03:30:41,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:30:41,172 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-03-19 03:30:41,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 03:30:41,172 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-03-19 03:30:41,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 03:30:41,172 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:30:41,173 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:30:41,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 03:30:41,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:41,396 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:30:41,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:30:41,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1603460440, now seen corresponding path program 3 times [2022-03-19 03:30:41,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:41,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1784118042] [2022-03-19 03:30:41,400 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:30:41,400 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:30:41,400 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:30:41,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1603460440, now seen corresponding path program 4 times [2022-03-19 03:30:41,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:30:41,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870922524] [2022-03-19 03:30:41,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:30:41,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:30:41,407 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:30:41,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916883326] [2022-03-19 03:30:41,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:30:41,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:41,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:30:41,436 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:30:41,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 03:30:41,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:30:41,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:30:41,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 03:30:41,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:30:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 03:30:41,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:30:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 03:30:42,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:30:42,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870922524] [2022-03-19 03:30:42,007 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:30:42,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916883326] [2022-03-19 03:30:42,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916883326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:30:42,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:30:42,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-19 03:30:42,008 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:30:42,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1784118042] [2022-03-19 03:30:42,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1784118042] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:30:42,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:30:42,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 03:30:42,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093535219] [2022-03-19 03:30:42,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:30:42,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 03:30:42,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:42,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 03:30:42,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-03-19 03:30:42,009 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 03:30:42,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:30:42,189 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-03-19 03:30:42,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 03:30:42,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-03-19 03:30:42,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:30:42,191 INFO L225 Difference]: With dead ends: 63 [2022-03-19 03:30:42,191 INFO L226 Difference]: Without dead ends: 58 [2022-03-19 03:30:42,191 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-03-19 03:30:42,192 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:30:42,192 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 156 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:30:42,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-19 03:30:42,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2022-03-19 03:30:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 03:30:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-03-19 03:30:42,201 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 32 [2022-03-19 03:30:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:30:42,202 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-03-19 03:30:42,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 12 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 03:30:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-03-19 03:30:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 03:30:42,203 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:30:42,203 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:30:42,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 03:30:42,418 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:42,418 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:30:42,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:30:42,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1882160230, now seen corresponding path program 1 times [2022-03-19 03:30:42,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:42,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [515821435] [2022-03-19 03:30:42,422 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:30:42,422 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:30:42,422 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:30:42,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1882160230, now seen corresponding path program 2 times [2022-03-19 03:30:42,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:30:42,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180565285] [2022-03-19 03:30:42,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:30:42,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:30:42,428 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:30:42,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695043815] [2022-03-19 03:30:42,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:30:42,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:42,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:30:42,429 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:30:42,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 03:30:42,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:30:42,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:30:42,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 03:30:42,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:30:42,802 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:30:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 03:30:43,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:30:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 03:30:43,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:30:43,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180565285] [2022-03-19 03:30:43,274 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:30:43,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695043815] [2022-03-19 03:30:43,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695043815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:30:43,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:30:43,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2022-03-19 03:30:43,274 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:30:43,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [515821435] [2022-03-19 03:30:43,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [515821435] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:30:43,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:30:43,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 03:30:43,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289945565] [2022-03-19 03:30:43,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:30:43,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 03:30:43,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:43,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 03:30:43,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-03-19 03:30:43,275 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 03:30:43,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:30:43,578 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2022-03-19 03:30:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 03:30:43,579 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-03-19 03:30:43,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:30:43,580 INFO L225 Difference]: With dead ends: 74 [2022-03-19 03:30:43,580 INFO L226 Difference]: Without dead ends: 60 [2022-03-19 03:30:43,580 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-03-19 03:30:43,581 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:30:43,581 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 172 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:30:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-19 03:30:43,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-03-19 03:30:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 44 states have internal predecessors, (50), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 03:30:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2022-03-19 03:30:43,592 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 32 [2022-03-19 03:30:43,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:30:43,593 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2022-03-19 03:30:43,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 03:30:43,593 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2022-03-19 03:30:43,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 03:30:43,593 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:30:43,594 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:30:43,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 03:30:43,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:43,816 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:30:43,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:30:43,816 INFO L85 PathProgramCache]: Analyzing trace with hash 697362150, now seen corresponding path program 3 times [2022-03-19 03:30:43,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:43,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1357895672] [2022-03-19 03:30:43,821 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:30:43,821 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:30:43,821 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:30:43,821 INFO L85 PathProgramCache]: Analyzing trace with hash 697362150, now seen corresponding path program 4 times [2022-03-19 03:30:43,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:30:43,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370970113] [2022-03-19 03:30:43,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:30:43,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:30:43,829 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:30:43,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785503819] [2022-03-19 03:30:43,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:30:43,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:43,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:30:43,831 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) [2022-03-19 03:30:43,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 03:30:43,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:30:43,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:30:43,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 03:30:43,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:30:44,217 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:30:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-19 03:30:44,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:30:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-19 03:30:45,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:30:45,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370970113] [2022-03-19 03:30:45,219 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:30:45,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785503819] [2022-03-19 03:30:45,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785503819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:30:45,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:30:45,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2022-03-19 03:30:45,219 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:30:45,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1357895672] [2022-03-19 03:30:45,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1357895672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:30:45,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:30:45,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 03:30:45,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051512659] [2022-03-19 03:30:45,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:30:45,220 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 03:30:45,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:45,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 03:30:45,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-19 03:30:45,221 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 03:30:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:30:45,573 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2022-03-19 03:30:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 03:30:45,574 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-03-19 03:30:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:30:45,574 INFO L225 Difference]: With dead ends: 94 [2022-03-19 03:30:45,574 INFO L226 Difference]: Without dead ends: 80 [2022-03-19 03:30:45,575 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-03-19 03:30:45,575 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:30:45,576 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 205 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:30:45,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-19 03:30:45,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2022-03-19 03:30:45,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.152542372881356) internal successors, (68), 60 states have internal predecessors, (68), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 03:30:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-03-19 03:30:45,588 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 32 [2022-03-19 03:30:45,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:30:45,588 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-03-19 03:30:45,588 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 03:30:45,588 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-03-19 03:30:45,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 03:30:45,589 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:30:45,589 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:30:45,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-19 03:30:45,807 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,SelfDestructingSolverStorable8 [2022-03-19 03:30:45,808 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:30:45,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:30:45,808 INFO L85 PathProgramCache]: Analyzing trace with hash -111984476, now seen corresponding path program 3 times [2022-03-19 03:30:45,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:45,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1000292737] [2022-03-19 03:30:45,811 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 6 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:30:45,811 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:30:45,811 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:30:45,811 INFO L85 PathProgramCache]: Analyzing trace with hash -111984476, now seen corresponding path program 4 times [2022-03-19 03:30:45,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:30:45,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229221643] [2022-03-19 03:30:45,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:30:45,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:30:45,818 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:30:45,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894327045] [2022-03-19 03:30:45,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:30:45,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:45,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:30:45,819 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) [2022-03-19 03:30:45,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 03:30:45,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:30:45,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:30:45,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 03:30:45,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:30:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 03:30:46,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:30:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 03:30:46,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:30:46,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229221643] [2022-03-19 03:30:46,469 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:30:46,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894327045] [2022-03-19 03:30:46,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894327045] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:30:46,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:30:46,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-03-19 03:30:46,470 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:30:46,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1000292737] [2022-03-19 03:30:46,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1000292737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:30:46,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:30:46,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 03:30:46,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13240460] [2022-03-19 03:30:46,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:30:46,470 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 03:30:46,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:46,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 03:30:46,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-03-19 03:30:46,471 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 03:30:46,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:30:46,643 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2022-03-19 03:30:46,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 03:30:46,644 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-03-19 03:30:46,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:30:46,644 INFO L225 Difference]: With dead ends: 93 [2022-03-19 03:30:46,644 INFO L226 Difference]: Without dead ends: 91 [2022-03-19 03:30:46,645 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-03-19 03:30:46,645 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 13 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:30:46,645 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 201 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:30:46,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-19 03:30:46,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-03-19 03:30:46,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 67 states have internal predecessors, (75), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 03:30:46,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2022-03-19 03:30:46,664 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 32 [2022-03-19 03:30:46,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:30:46,664 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2022-03-19 03:30:46,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 03:30:46,664 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2022-03-19 03:30:46,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 03:30:46,666 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:30:46,666 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:30:46,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-19 03:30:46,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-19 03:30:46,875 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:30:46,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:30:46,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1857919347, now seen corresponding path program 1 times [2022-03-19 03:30:46,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:46,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1305881767] [2022-03-19 03:30:46,880 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:30:46,881 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:30:46,881 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:30:46,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1857919347, now seen corresponding path program 2 times [2022-03-19 03:30:46,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:30:46,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324529419] [2022-03-19 03:30:46,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:30:46,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:30:46,894 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:30:46,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112530503] [2022-03-19 03:30:46,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:30:46,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:46,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:30:46,902 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) [2022-03-19 03:30:46,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 03:30:46,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:30:46,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:30:46,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 03:30:46,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:30:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:30:47,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:30:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-19 03:30:47,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:30:47,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324529419] [2022-03-19 03:30:47,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:30:47,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112530503] [2022-03-19 03:30:47,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112530503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:30:47,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:30:47,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 03:30:47,090 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:30:47,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1305881767] [2022-03-19 03:30:47,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1305881767] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:30:47,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:30:47,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 03:30:47,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273827485] [2022-03-19 03:30:47,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:30:47,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 03:30:47,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:47,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 03:30:47,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 03:30:47,091 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 03:30:47,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:30:47,130 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2022-03-19 03:30:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 03:30:47,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2022-03-19 03:30:47,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:30:47,132 INFO L225 Difference]: With dead ends: 94 [2022-03-19 03:30:47,132 INFO L226 Difference]: Without dead ends: 86 [2022-03-19 03:30:47,132 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-19 03:30:47,133 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:30:47,133 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 91 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:30:47,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-19 03:30:47,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-03-19 03:30:47,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 67 states have internal predecessors, (72), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 03:30:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2022-03-19 03:30:47,148 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 33 [2022-03-19 03:30:47,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:30:47,148 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2022-03-19 03:30:47,148 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 03:30:47,149 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2022-03-19 03:30:47,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 03:30:47,149 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:30:47,149 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:30:47,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 03:30:47,355 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,SelfDestructingSolverStorable10 [2022-03-19 03:30:47,355 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:30:47,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:30:47,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1589915704, now seen corresponding path program 3 times [2022-03-19 03:30:47,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:47,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [880894670] [2022-03-19 03:30:47,358 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 6 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:30:47,358 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:30:47,358 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:30:47,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1589915704, now seen corresponding path program 4 times [2022-03-19 03:30:47,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:30:47,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86575275] [2022-03-19 03:30:47,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:30:47,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:30:47,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:30:47,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456751698] [2022-03-19 03:30:47,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:30:47,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:47,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:30:47,375 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) [2022-03-19 03:30:47,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 03:30:47,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:30:47,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:30:47,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-19 03:30:47,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:30:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 03:30:47,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:30:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-19 03:30:48,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:30:48,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86575275] [2022-03-19 03:30:48,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:30:48,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456751698] [2022-03-19 03:30:48,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456751698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:30:48,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:30:48,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 24 [2022-03-19 03:30:48,120 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:30:48,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [880894670] [2022-03-19 03:30:48,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [880894670] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:30:48,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:30:48,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 03:30:48,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199187802] [2022-03-19 03:30:48,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:30:48,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 03:30:48,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:48,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 03:30:48,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-19 03:30:48,122 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:30:48,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:30:48,482 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2022-03-19 03:30:48,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 03:30:48,483 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 39 [2022-03-19 03:30:48,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:30:48,484 INFO L225 Difference]: With dead ends: 97 [2022-03-19 03:30:48,484 INFO L226 Difference]: Without dead ends: 89 [2022-03-19 03:30:48,484 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-03-19 03:30:48,487 INFO L912 BasicCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:30:48,487 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 209 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:30:48,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-19 03:30:48,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2022-03-19 03:30:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.11864406779661) internal successors, (66), 60 states have internal predecessors, (66), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 03:30:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2022-03-19 03:30:48,500 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 39 [2022-03-19 03:30:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:30:48,500 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2022-03-19 03:30:48,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:30:48,500 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2022-03-19 03:30:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 03:30:48,501 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:30:48,501 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:30:48,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 03:30:48,723 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,SelfDestructingSolverStorable11 [2022-03-19 03:30:48,723 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:30:48,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:30:48,724 INFO L85 PathProgramCache]: Analyzing trace with hash -108827544, now seen corresponding path program 5 times [2022-03-19 03:30:48,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:48,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [186141059] [2022-03-19 03:30:48,740 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:30:48,740 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:30:48,740 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:30:48,740 INFO L85 PathProgramCache]: Analyzing trace with hash -108827544, now seen corresponding path program 6 times [2022-03-19 03:30:48,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:30:48,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084472021] [2022-03-19 03:30:48,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:30:48,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:30:48,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:30:48,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451654871] [2022-03-19 03:30:48,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:30:48,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:30:48,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:30:48,773 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) [2022-03-19 03:30:48,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 03:30:48,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 03:30:48,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:30:48,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 03:30:48,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:30:48,965 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:30:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 03:30:49,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:30:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 03:30:49,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:30:49,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084472021] [2022-03-19 03:30:49,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:30:49,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451654871] [2022-03-19 03:30:49,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451654871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:30:49,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:30:49,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2022-03-19 03:30:49,791 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:30:49,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [186141059] [2022-03-19 03:30:49,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [186141059] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:30:49,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:30:49,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 03:30:49,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422814210] [2022-03-19 03:30:49,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:30:49,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 03:30:49,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:30:49,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 03:30:49,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-19 03:30:49,792 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 03:31:06,047 WARN L232 SmtUtils]: Spent 16.24s on a formula simplification. DAG size of input: 45 DAG size of output: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 03:31:10,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 03:31:14,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:31:14,388 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2022-03-19 03:31:14,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 03:31:14,388 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-03-19 03:31:14,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:31:14,389 INFO L225 Difference]: With dead ends: 103 [2022-03-19 03:31:14,389 INFO L226 Difference]: Without dead ends: 97 [2022-03-19 03:31:14,389 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=78, Invalid=340, Unknown=2, NotChecked=0, Total=420 [2022-03-19 03:31:14,390 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:31:14,390 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 88 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 94 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-03-19 03:31:14,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-19 03:31:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2022-03-19 03:31:14,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 68 states have internal predecessors, (75), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 03:31:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2022-03-19 03:31:14,401 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 42 [2022-03-19 03:31:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:31:14,401 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2022-03-19 03:31:14,401 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 03:31:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2022-03-19 03:31:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 03:31:14,402 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:31:14,402 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:31:14,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 03:31:14,615 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,SelfDestructingSolverStorable12 [2022-03-19 03:31:14,615 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:31:14,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:31:14,616 INFO L85 PathProgramCache]: Analyzing trace with hash -918174170, now seen corresponding path program 5 times [2022-03-19 03:31:14,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:31:14,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1368564858] [2022-03-19 03:31:14,619 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:31:14,619 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:31:14,619 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:31:14,619 INFO L85 PathProgramCache]: Analyzing trace with hash -918174170, now seen corresponding path program 6 times [2022-03-19 03:31:14,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:31:14,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488605531] [2022-03-19 03:31:14,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:31:14,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:31:14,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:31:14,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878197977] [2022-03-19 03:31:14,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:31:14,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:31:14,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:31:14,635 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) [2022-03-19 03:31:14,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 03:31:14,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 03:31:14,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:31:14,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-19 03:31:14,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:31:14,823 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:31:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 03:31:14,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:31:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 03:31:15,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:31:15,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488605531] [2022-03-19 03:31:15,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:31:15,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878197977] [2022-03-19 03:31:15,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878197977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:31:15,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:31:15,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 17 [2022-03-19 03:31:15,310 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:31:15,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1368564858] [2022-03-19 03:31:15,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1368564858] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:31:15,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:31:15,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 03:31:15,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136425017] [2022-03-19 03:31:15,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:31:15,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 03:31:15,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:31:15,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 03:31:15,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-03-19 03:31:15,312 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 03:31:15,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:31:15,901 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2022-03-19 03:31:15,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 03:31:15,902 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 42 [2022-03-19 03:31:15,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:31:15,903 INFO L225 Difference]: With dead ends: 103 [2022-03-19 03:31:15,903 INFO L226 Difference]: Without dead ends: 101 [2022-03-19 03:31:15,904 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-03-19 03:31:15,904 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:31:15,904 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 100 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:31:15,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-19 03:31:15,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2022-03-19 03:31:15,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 76 states have internal predecessors, (86), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 03:31:15,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2022-03-19 03:31:15,923 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 42 [2022-03-19 03:31:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:31:15,925 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2022-03-19 03:31:15,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-19 03:31:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2022-03-19 03:31:15,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 03:31:15,925 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:31:15,925 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:31:15,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 03:31:16,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 03:31:16,139 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:31:16,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:31:16,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1427647260, now seen corresponding path program 7 times [2022-03-19 03:31:16,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:31:16,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [236084943] [2022-03-19 03:31:16,143 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:31:16,143 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:31:16,143 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:31:16,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1427647260, now seen corresponding path program 8 times [2022-03-19 03:31:16,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:31:16,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349247114] [2022-03-19 03:31:16,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:31:16,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:31:16,149 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:31:16,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171393142] [2022-03-19 03:31:16,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:31:16,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:31:16,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:31:16,156 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:31:16,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 03:31:16,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:31:16,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:31:16,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 03:31:16,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:31:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 03:31:16,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:31:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 03:31:17,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:31:17,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349247114] [2022-03-19 03:31:17,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:31:17,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171393142] [2022-03-19 03:31:17,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171393142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:31:17,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:31:17,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 24 [2022-03-19 03:31:17,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:31:17,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [236084943] [2022-03-19 03:31:17,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [236084943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:31:17,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:31:17,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 03:31:17,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809365308] [2022-03-19 03:31:17,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:31:17,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 03:31:17,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:31:17,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 03:31:17,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-03-19 03:31:17,004 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:31:17,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:31:17,282 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2022-03-19 03:31:17,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 03:31:17,282 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 42 [2022-03-19 03:31:17,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:31:17,283 INFO L225 Difference]: With dead ends: 113 [2022-03-19 03:31:17,283 INFO L226 Difference]: Without dead ends: 111 [2022-03-19 03:31:17,283 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-03-19 03:31:17,284 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:31:17,284 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 304 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:31:17,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-19 03:31:17,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2022-03-19 03:31:17,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 81 states have (on average 1.1481481481481481) internal successors, (93), 83 states have internal predecessors, (93), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 03:31:17,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2022-03-19 03:31:17,305 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 42 [2022-03-19 03:31:17,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:31:17,305 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2022-03-19 03:31:17,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:31:17,305 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2022-03-19 03:31:17,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-19 03:31:17,305 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:31:17,306 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:31:17,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 03:31:17,517 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:31:17,518 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:31:17,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:31:17,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1682521956, now seen corresponding path program 9 times [2022-03-19 03:31:17,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:31:17,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1044873976] [2022-03-19 03:31:17,523 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:31:17,523 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:31:17,523 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:31:17,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1682521956, now seen corresponding path program 10 times [2022-03-19 03:31:17,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:31:17,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411682134] [2022-03-19 03:31:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:31:17,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:31:17,527 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:31:17,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746859256] [2022-03-19 03:31:17,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:31:17,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:31:17,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:31:17,533 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:31:17,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 03:31:17,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:31:17,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:31:17,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 03:31:17,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:31:17,756 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:31:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 03:31:18,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:31:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 03:31:18,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:31:18,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411682134] [2022-03-19 03:31:18,281 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:31:18,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746859256] [2022-03-19 03:31:18,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746859256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:31:18,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:31:18,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2022-03-19 03:31:18,282 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:31:18,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1044873976] [2022-03-19 03:31:18,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1044873976] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:31:18,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:31:18,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 03:31:18,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772538756] [2022-03-19 03:31:18,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:31:18,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 03:31:18,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:31:18,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 03:31:18,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-03-19 03:31:18,285 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:31:36,922 WARN L232 SmtUtils]: Spent 18.14s on a formula simplification. DAG size of input: 48 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 03:31:37,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:31:37,246 INFO L93 Difference]: Finished difference Result 150 states and 171 transitions. [2022-03-19 03:31:37,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 03:31:37,247 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 42 [2022-03-19 03:31:37,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:31:37,250 INFO L225 Difference]: With dead ends: 150 [2022-03-19 03:31:37,250 INFO L226 Difference]: Without dead ends: 148 [2022-03-19 03:31:37,251 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-03-19 03:31:37,251 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 03:31:37,251 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 234 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 03:31:37,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-19 03:31:37,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 107. [2022-03-19 03:31:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 84 states have internal predecessors, (95), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 03:31:37,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2022-03-19 03:31:37,288 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 42 [2022-03-19 03:31:37,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:31:37,289 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2022-03-19 03:31:37,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:31:37,289 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2022-03-19 03:31:37,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 03:31:37,289 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:31:37,289 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:31:37,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-19 03:31:37,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 03:31:37,528 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:31:37,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:31:37,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1526027469, now seen corresponding path program 3 times [2022-03-19 03:31:37,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:31:37,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [970783664] [2022-03-19 03:31:37,531 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:31:37,531 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:31:37,531 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:31:37,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1526027469, now seen corresponding path program 4 times [2022-03-19 03:31:37,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:31:37,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737328482] [2022-03-19 03:31:37,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:31:37,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:31:37,536 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:31:37,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189061511] [2022-03-19 03:31:37,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:31:37,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:31:37,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:31:37,537 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:31:37,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 03:31:37,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:31:37,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:31:37,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 03:31:37,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:31:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:31:37,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:31:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 03:31:37,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:31:37,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737328482] [2022-03-19 03:31:37,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:31:37,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189061511] [2022-03-19 03:31:37,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189061511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:31:37,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:31:37,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 03:31:37,745 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:31:37,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [970783664] [2022-03-19 03:31:37,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [970783664] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:31:37,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:31:37,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 03:31:37,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802426077] [2022-03-19 03:31:37,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:31:37,746 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 03:31:37,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:31:37,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 03:31:37,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 03:31:37,746 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:31:37,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:31:37,800 INFO L93 Difference]: Finished difference Result 131 states and 144 transitions. [2022-03-19 03:31:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 03:31:37,801 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2022-03-19 03:31:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:31:37,801 INFO L225 Difference]: With dead ends: 131 [2022-03-19 03:31:37,801 INFO L226 Difference]: Without dead ends: 123 [2022-03-19 03:31:37,802 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-19 03:31:37,802 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:31:37,802 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 84 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 03:31:37,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-19 03:31:37,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2022-03-19 03:31:37,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 95 states have internal predecessors, (106), 14 states have call successors, (14), 13 states have call predecessors, (14), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 03:31:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2022-03-19 03:31:37,821 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 43 [2022-03-19 03:31:37,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:31:37,821 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2022-03-19 03:31:37,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:31:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2022-03-19 03:31:37,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 03:31:37,821 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:31:37,821 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:31:37,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 03:31:38,028 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-19 03:31:38,028 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:31:38,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:31:38,028 INFO L85 PathProgramCache]: Analyzing trace with hash -684010378, now seen corresponding path program 1 times [2022-03-19 03:31:38,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:31:38,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2091282665] [2022-03-19 03:31:38,031 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:31:38,031 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:31:38,032 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:31:38,032 INFO L85 PathProgramCache]: Analyzing trace with hash -684010378, now seen corresponding path program 2 times [2022-03-19 03:31:38,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:31:38,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79811585] [2022-03-19 03:31:38,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:31:38,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:31:38,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:31:38,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436480607] [2022-03-19 03:31:38,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:31:38,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:31:38,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:31:38,039 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:31:38,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 03:31:38,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:31:38,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:31:38,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 03:31:38,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:31:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 03:31:38,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:31:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 03:31:38,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:31:38,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79811585] [2022-03-19 03:31:38,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:31:38,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436480607] [2022-03-19 03:31:38,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436480607] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:31:38,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:31:38,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 03:31:38,464 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:31:38,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2091282665] [2022-03-19 03:31:38,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2091282665] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:31:38,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:31:38,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 03:31:38,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948299457] [2022-03-19 03:31:38,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:31:38,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 03:31:38,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:31:38,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 03:31:38,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-19 03:31:38,465 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 03:31:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:31:38,574 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2022-03-19 03:31:38,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 03:31:38,574 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 49 [2022-03-19 03:31:38,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:31:38,597 INFO L225 Difference]: With dead ends: 136 [2022-03-19 03:31:38,598 INFO L226 Difference]: Without dead ends: 128 [2022-03-19 03:31:38,598 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-19 03:31:38,599 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:31:38,599 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 173 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:31:38,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-19 03:31:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2022-03-19 03:31:38,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 97 states have (on average 1.134020618556701) internal successors, (110), 99 states have internal predecessors, (110), 15 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 03:31:38,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2022-03-19 03:31:38,626 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 49 [2022-03-19 03:31:38,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:31:38,626 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2022-03-19 03:31:38,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 03:31:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2022-03-19 03:31:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 03:31:38,627 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:31:38,628 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:31:38,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-19 03:31:38,848 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 03:31:38,848 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:31:38,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:31:38,848 INFO L85 PathProgramCache]: Analyzing trace with hash 736401910, now seen corresponding path program 3 times [2022-03-19 03:31:38,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:31:38,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1134177048] [2022-03-19 03:31:38,851 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:31:38,851 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:31:38,851 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:31:38,851 INFO L85 PathProgramCache]: Analyzing trace with hash 736401910, now seen corresponding path program 4 times [2022-03-19 03:31:38,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:31:38,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020721507] [2022-03-19 03:31:38,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:31:38,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:31:38,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:31:38,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755384836] [2022-03-19 03:31:38,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:31:38,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:31:38,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:31:38,857 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:31:38,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 03:31:38,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:31:38,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:31:38,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 03:31:38,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:31:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 03:31:39,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:31:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 03:31:39,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:31:39,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020721507] [2022-03-19 03:31:39,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:31:39,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755384836] [2022-03-19 03:31:39,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755384836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:31:39,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:31:39,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 03:31:39,339 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:31:39,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1134177048] [2022-03-19 03:31:39,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1134177048] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:31:39,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:31:39,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 03:31:39,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144217686] [2022-03-19 03:31:39,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:31:39,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 03:31:39,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:31:39,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 03:31:39,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-19 03:31:39,340 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 03:31:39,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:31:39,447 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2022-03-19 03:31:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 03:31:39,447 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 49 [2022-03-19 03:31:39,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:31:39,448 INFO L225 Difference]: With dead ends: 138 [2022-03-19 03:31:39,448 INFO L226 Difference]: Without dead ends: 130 [2022-03-19 03:31:39,448 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-19 03:31:39,448 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 3 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 03:31:39,449 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 156 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 03:31:39,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-19 03:31:39,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2022-03-19 03:31:39,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 96 states have internal predecessors, (107), 15 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 03:31:39,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2022-03-19 03:31:39,467 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 49 [2022-03-19 03:31:39,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:31:39,467 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2022-03-19 03:31:39,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 03:31:39,467 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2022-03-19 03:31:39,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 03:31:39,468 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:31:39,468 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:31:39,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 03:31:39,685 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:31:39,685 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:31:39,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:31:39,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1528015880, now seen corresponding path program 5 times [2022-03-19 03:31:39,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:31:39,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1617930988] [2022-03-19 03:31:39,700 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:31:39,700 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:31:39,700 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:31:39,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1528015880, now seen corresponding path program 6 times [2022-03-19 03:31:39,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:31:39,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137159400] [2022-03-19 03:31:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:31:39,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:31:39,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:31:39,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757038452] [2022-03-19 03:31:39,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:31:39,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:31:39,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:31:39,710 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:31:39,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 03:31:39,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 03:31:39,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:31:39,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 03:31:39,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:31:40,085 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:31:40,090 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:31:40,104 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:31:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-03-19 03:31:50,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:31:51,049 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:37:15,319 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((aux_div_main_~v~0_57 Int) (aux_div_aux_mod_aux_mod_aux_mod_main_~v~0_57_59_81_103 Int) (aux_div_aux_mod_main_~v~0_57_59 Int)) (let ((.cse2 (* c_main_~X~0 c_main_~y~0)) (.cse1 (* (- 1) c_main_~Y~0))) (or (forall ((aux_div_aux_mod_aux_mod_main_~v~0_57_59_81 Int)) (or (let ((.cse0 (div (+ (* (- 1) c_main_~Y~0) aux_div_aux_mod_aux_mod_main_~v~0_57_59_81 c_main_~X~0 (* c_main_~X~0 c_main_~y~0)) c_main_~Y~0))) (<= (+ .cse0 aux_div_aux_mod_aux_mod_main_~v~0_57_59_81 (* .cse0 c_main_~y~0)) (+ c_main_~Y~0 (* c_main_~Y~0 .cse0) c_main_~y~0 1))) (<= (+ aux_div_aux_mod_aux_mod_main_~v~0_57_59_81 1) aux_div_aux_mod_main_~v~0_57_59) (<= (+ aux_div_aux_mod_aux_mod_aux_mod_main_~v~0_57_59_81_103 1) aux_div_aux_mod_aux_mod_main_~v~0_57_59_81))) (<= (+ aux_div_aux_mod_aux_mod_aux_mod_main_~v~0_57_59_81_103 1) aux_div_aux_mod_main_~v~0_57_59) (<= (+ aux_div_aux_mod_main_~v~0_57_59 1) aux_div_main_~v~0_57) (< (+ c_main_~X~0 1) (div (+ aux_div_aux_mod_main_~v~0_57_59 .cse1 c_main_~X~0 .cse2) c_main_~Y~0)) (<= (+ aux_div_main_~v~0_57 1) aux_div_aux_mod_aux_mod_aux_mod_main_~v~0_57_59_81_103) (<= (div (+ .cse1 aux_div_aux_mod_aux_mod_aux_mod_main_~v~0_57_59_81_103 c_main_~X~0 .cse2) c_main_~Y~0) c_main_~X~0) (not (= (mod (+ .cse1 (* c_main_~X~0 (+ c_main_~y~0 1)) aux_div_main_~v~0_57) c_main_~Y~0) 0))))) (= c_main_~Y~0 0)) is different from true [2022-03-19 03:37:50,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:37:50,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137159400] [2022-03-19 03:37:50,394 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:37:50,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757038452] [2022-03-19 03:37:50,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757038452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 03:37:50,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 03:37:50,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-19 03:37:50,395 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:37:50,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1617930988] [2022-03-19 03:37:50,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1617930988] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:37:50,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:37:50,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 03:37:50,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045506657] [2022-03-19 03:37:50,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:37:50,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 03:37:50,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:37:50,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 03:37:50,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=464, Unknown=6, NotChecked=44, Total=600 [2022-03-19 03:37:50,396 INFO L87 Difference]: Start difference. First operand 122 states and 135 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:37:58,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 03:38:02,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 03:38:06,926 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 03:38:08,930 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 03:38:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:38:09,414 INFO L93 Difference]: Finished difference Result 148 states and 165 transitions. [2022-03-19 03:38:09,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 03:38:09,416 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2022-03-19 03:38:09,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:38:09,417 INFO L225 Difference]: With dead ends: 148 [2022-03-19 03:38:09,417 INFO L226 Difference]: Without dead ends: 140 [2022-03-19 03:38:09,418 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=156, Invalid=832, Unknown=8, NotChecked=60, Total=1056 [2022-03-19 03:38:09,418 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 28 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 11 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-03-19 03:38:09,419 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 231 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 312 Invalid, 3 Unknown, 0 Unchecked, 9.0s Time] [2022-03-19 03:38:09,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-19 03:38:09,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 132. [2022-03-19 03:38:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 105 states have internal predecessors, (117), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 03:38:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 149 transitions. [2022-03-19 03:38:09,447 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 149 transitions. Word has length 49 [2022-03-19 03:38:09,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:38:09,447 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 149 transitions. [2022-03-19 03:38:09,447 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:38:09,447 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 149 transitions. [2022-03-19 03:38:09,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-19 03:38:09,448 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:38:09,448 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:38:09,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 03:38:09,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:38:09,661 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:38:09,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:38:09,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1387467270, now seen corresponding path program 5 times [2022-03-19 03:38:09,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:38:09,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [746705881] [2022-03-19 03:38:09,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 6 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:38:09,664 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:38:09,664 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:38:09,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1387467270, now seen corresponding path program 6 times [2022-03-19 03:38:09,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:38:09,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737050717] [2022-03-19 03:38:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:38:09,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:38:09,675 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:38:09,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296358] [2022-03-19 03:38:09,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:38:09,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:38:09,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:38:09,677 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:38:09,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 03:38:10,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 03:38:10,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:38:10,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 03:38:10,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:38:11,219 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:38:11,221 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:38:11,223 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:38:19,116 WARN L833 $PredicateComparison]: unable to prove that (and (let ((.cse3 (+ c_main_~X~0 1)) (.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) (* c_main_~X~0 c_main_~y~0))) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) (<= 0 c_main_~X~0)) is different from false [2022-03-19 03:38:37,365 WARN L232 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-19 03:40:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 28 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-03-19 03:40:05,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:40:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-03-19 03:40:08,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:40:08,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737050717] [2022-03-19 03:40:08,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:40:08,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296358] [2022-03-19 03:40:08,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:40:08,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:40:08,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2022-03-19 03:40:08,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:40:08,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [746705881] [2022-03-19 03:40:08,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [746705881] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:40:08,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:40:08,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 03:40:08,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736565555] [2022-03-19 03:40:08,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:40:08,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 03:40:08,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:40:08,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 03:40:08,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=384, Unknown=1, NotChecked=40, Total=506 [2022-03-19 03:40:08,005 INFO L87 Difference]: Start difference. First operand 132 states and 149 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:40:11,682 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse7 (* c_main_~X~0 c_main_~y~0)) (.cse3 (+ c_main_~X~0 1))) (and (let ((.cse2 (+ (* (- 1) c_main_~Y~0) (div (+ c_main_~v~0 c_main_~X~0) 2) .cse7)) (.cse0 (= c_main_~Y~0 0)) (.cse4 (= (mod (+ (* 2 c_main_~X~0 c_main_~y~0) c_main_~v~0 c_main_~X~0) 2) 0))) (or (let ((.cse1 (div .cse2 c_main_~Y~0))) (and (not .cse0) (not (<= .cse1 c_main_~X~0)) (= (mod .cse2 c_main_~Y~0) 0) (= c_main_~xy~0 (* c_main_~y~0 .cse1)) (<= .cse1 .cse3) (= c_main_~yx~0 (* c_main_~Y~0 .cse1)) .cse4)) (and (let ((.cse6 (= c_main_~y~0 0))) (or (let ((.cse5 (div c_main_~xy~0 c_main_~y~0))) (and (<= .cse5 .cse3) (= (mod c_main_~xy~0 c_main_~y~0) 0) (not .cse6) (< c_main_~X~0 .cse5))) (and .cse6 (= c_main_~xy~0 0)))) (= 0 .cse2) .cse0 (= c_main_~yx~0 0) .cse4))) (<= 0 c_main_~X~0) (not (<= c_main_~x~0 c_main_~X~0)) (= (+ (* 2 (* c_main_~Y~0 c_main_~x~0)) (* 2 c_main_~Y~0)) (+ (* 2 .cse7) c_main_~v~0 c_main_~X~0)) (<= c_main_~x~0 .cse3))) is different from false [2022-03-19 03:40:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:40:11,906 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2022-03-19 03:40:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 03:40:11,907 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2022-03-19 03:40:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:40:11,908 INFO L225 Difference]: With dead ends: 145 [2022-03-19 03:40:11,908 INFO L226 Difference]: Without dead ends: 137 [2022-03-19 03:40:11,909 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=185, Invalid=751, Unknown=2, NotChecked=118, Total=1056 [2022-03-19 03:40:11,909 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 03:40:11,909 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 105 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 99 Invalid, 0 Unknown, 48 Unchecked, 0.5s Time] [2022-03-19 03:40:11,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-19 03:40:11,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 120. [2022-03-19 03:40:11,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 93 states have (on average 1.118279569892473) internal successors, (104), 95 states have internal predecessors, (104), 14 states have call successors, (14), 13 states have call predecessors, (14), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 03:40:11,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2022-03-19 03:40:11,944 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 49 [2022-03-19 03:40:11,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:40:11,944 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2022-03-19 03:40:11,944 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:40:11,944 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2022-03-19 03:40:11,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 03:40:11,945 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:40:11,945 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:40:11,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 03:40:12,152 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-19 03:40:12,152 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:40:12,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:40:12,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1434541020, now seen corresponding path program 11 times [2022-03-19 03:40:12,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:40:12,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1450572359] [2022-03-19 03:40:12,155 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:40:12,155 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:40:12,155 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:40:12,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1434541020, now seen corresponding path program 12 times [2022-03-19 03:40:12,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:40:12,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981107196] [2022-03-19 03:40:12,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:40:12,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:40:12,160 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:40:12,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890983022] [2022-03-19 03:40:12,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:40:12,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:40:12,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:40:12,163 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:40:12,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 03:40:12,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 03:40:12,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:40:12,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 03:40:12,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:40:14,510 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:40:14,513 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:40:14,519 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:40:14,526 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:40:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-19 03:40:28,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:40:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-19 03:40:34,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:40:34,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981107196] [2022-03-19 03:40:34,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:40:34,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890983022] [2022-03-19 03:40:34,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890983022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:40:34,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:40:34,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 21 [2022-03-19 03:40:34,902 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:40:34,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1450572359] [2022-03-19 03:40:34,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1450572359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:40:34,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:40:34,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 03:40:34,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648684227] [2022-03-19 03:40:34,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:40:34,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 03:40:34,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:40:34,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 03:40:34,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=357, Unknown=1, NotChecked=0, Total=420 [2022-03-19 03:40:34,903 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:40:37,604 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 03:40:39,663 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 03:40:43,920 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 03:40:48,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 03:40:52,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 03:40:54,487 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 03:41:26,216 WARN L232 SmtUtils]: Spent 22.61s on a formula simplification. DAG size of input: 80 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 03:41:28,427 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 03:41:30,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 03:41:30,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:41:30,925 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2022-03-19 03:41:30,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 03:41:30,926 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2022-03-19 03:41:30,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:41:30,927 INFO L225 Difference]: With dead ends: 137 [2022-03-19 03:41:30,927 INFO L226 Difference]: Without dead ends: 135 [2022-03-19 03:41:30,928 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 54.4s TimeCoverageRelationStatistics Valid=119, Invalid=633, Unknown=4, NotChecked=0, Total=756 [2022-03-19 03:41:30,928 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 9 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.5s IncrementalHoareTripleChecker+Time [2022-03-19 03:41:30,928 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 168 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 195 Invalid, 7 Unknown, 0 Unchecked, 17.5s Time] [2022-03-19 03:41:30,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-19 03:41:30,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 120. [2022-03-19 03:41:30,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 93 states have (on average 1.118279569892473) internal successors, (104), 95 states have internal predecessors, (104), 14 states have call successors, (14), 13 states have call predecessors, (14), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 03:41:30,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2022-03-19 03:41:30,972 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 52 [2022-03-19 03:41:30,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:41:30,972 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2022-03-19 03:41:30,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-19 03:41:30,972 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2022-03-19 03:41:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 03:41:30,979 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:41:30,979 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:41:30,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-19 03:41:31,180 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-19 03:41:31,180 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:41:31,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:41:31,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1654553692, now seen corresponding path program 13 times [2022-03-19 03:41:31,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:41:31,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1282232776] [2022-03-19 03:41:31,183 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:41:31,183 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:41:31,183 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:41:31,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1654553692, now seen corresponding path program 14 times [2022-03-19 03:41:31,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:41:31,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027558773] [2022-03-19 03:41:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:41:31,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:41:31,188 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:41:31,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130799160] [2022-03-19 03:41:31,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:41:31,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:41:31,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:41:31,196 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:41:31,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 03:41:31,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:41:31,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:41:31,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-19 03:41:31,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:41:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 03:41:34,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:41:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-19 03:41:37,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:41:37,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027558773] [2022-03-19 03:41:37,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:41:37,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130799160] [2022-03-19 03:41:37,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130799160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:41:37,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:41:37,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 25 [2022-03-19 03:41:37,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:41:37,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1282232776] [2022-03-19 03:41:37,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1282232776] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:41:37,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:41:37,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 03:41:37,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98032659] [2022-03-19 03:41:37,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:41:37,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 03:41:37,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:41:37,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 03:41:37,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-03-19 03:41:37,075 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 03:41:40,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:41:40,575 INFO L93 Difference]: Finished difference Result 156 states and 172 transitions. [2022-03-19 03:41:40,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 03:41:40,576 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 52 [2022-03-19 03:41:40,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:41:40,577 INFO L225 Difference]: With dead ends: 156 [2022-03-19 03:41:40,577 INFO L226 Difference]: Without dead ends: 142 [2022-03-19 03:41:40,577 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2022-03-19 03:41:40,578 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-19 03:41:40,578 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 348 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-19 03:41:40,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-19 03:41:40,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2022-03-19 03:41:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 109 states have (on average 1.1192660550458715) internal successors, (122), 111 states have internal predecessors, (122), 16 states have call successors, (16), 15 states have call predecessors, (16), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 03:41:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2022-03-19 03:41:40,601 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 52 [2022-03-19 03:41:40,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:41:40,601 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2022-03-19 03:41:40,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 03:41:40,602 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2022-03-19 03:41:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 03:41:40,602 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:41:40,602 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:41:40,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-19 03:41:40,818 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:41:40,818 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:41:40,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:41:40,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1831066978, now seen corresponding path program 15 times [2022-03-19 03:41:40,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:41:40,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [186095103] [2022-03-19 03:41:40,821 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:41:40,821 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:41:40,821 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:41:40,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1831066978, now seen corresponding path program 16 times [2022-03-19 03:41:40,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:41:40,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091130077] [2022-03-19 03:41:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:41:40,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:41:40,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:41:40,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008018221] [2022-03-19 03:41:40,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:41:40,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:41:40,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:41:40,826 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:41:40,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 03:41:40,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:41:40,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:41:40,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-19 03:41:40,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:41:43,197 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:41:46,088 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:41:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 14 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 03:41:47,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:41:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-19 03:41:50,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:41:50,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091130077] [2022-03-19 03:41:50,088 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:41:50,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008018221] [2022-03-19 03:41:50,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008018221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:41:50,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:41:50,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 29 [2022-03-19 03:41:50,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:41:50,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [186095103] [2022-03-19 03:41:50,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [186095103] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:41:50,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:41:50,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 03:41:50,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161559670] [2022-03-19 03:41:50,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:41:50,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 03:41:50,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:41:50,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 03:41:50,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-03-19 03:41:50,090 INFO L87 Difference]: Start difference. First operand 140 states and 152 transitions. Second operand has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 03:41:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:41:55,379 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2022-03-19 03:41:55,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 03:41:55,380 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 52 [2022-03-19 03:41:55,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:41:55,381 INFO L225 Difference]: With dead ends: 154 [2022-03-19 03:41:55,381 INFO L226 Difference]: Without dead ends: 152 [2022-03-19 03:41:55,381 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=160, Invalid=1030, Unknown=0, NotChecked=0, Total=1190 [2022-03-19 03:41:55,382 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-19 03:41:55,382 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 395 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-19 03:41:55,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-19 03:41:55,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2022-03-19 03:41:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 112 states have (on average 1.125) internal successors, (126), 114 states have internal predecessors, (126), 16 states have call successors, (16), 15 states have call predecessors, (16), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 03:41:55,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2022-03-19 03:41:55,405 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 52 [2022-03-19 03:41:55,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:41:55,405 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2022-03-19 03:41:55,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 20 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 03:41:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2022-03-19 03:41:55,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-19 03:41:55,406 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:41:55,406 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:41:55,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 03:41:55,610 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:41:55,610 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:41:55,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:41:55,611 INFO L85 PathProgramCache]: Analyzing trace with hash -169882076, now seen corresponding path program 17 times [2022-03-19 03:41:55,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:41:55,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1571000499] [2022-03-19 03:41:55,613 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:41:55,614 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:41:55,614 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:41:55,614 INFO L85 PathProgramCache]: Analyzing trace with hash -169882076, now seen corresponding path program 18 times [2022-03-19 03:41:55,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:41:55,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492169433] [2022-03-19 03:41:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:41:55,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:41:55,618 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:41:55,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166197282] [2022-03-19 03:41:55,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:41:55,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:41:55,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:41:55,619 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:41:55,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 03:41:55,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-19 03:41:55,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:41:55,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 03:41:55,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:41:56,060 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:41:56,061 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:41:56,064 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 03:41:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-19 03:41:59,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:42:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-19 03:42:00,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:42:00,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492169433] [2022-03-19 03:42:00,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:42:00,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166197282] [2022-03-19 03:42:00,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166197282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:42:00,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:42:00,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2022-03-19 03:42:00,558 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:42:00,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1571000499] [2022-03-19 03:42:00,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1571000499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:42:00,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:42:00,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 03:42:00,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975270419] [2022-03-19 03:42:00,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:42:00,559 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 03:42:00,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:42:00,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 03:42:00,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=126, Unknown=1, NotChecked=0, Total=156 [2022-03-19 03:42:00,559 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand has 10 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 03:42:29,726 WARN L232 SmtUtils]: Spent 29.05s on a formula simplification. DAG size of input: 69 DAG size of output: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 03:42:30,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:42:30,293 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2022-03-19 03:42:30,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 03:42:30,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2022-03-19 03:42:30,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:42:30,294 INFO L225 Difference]: With dead ends: 149 [2022-03-19 03:42:30,294 INFO L226 Difference]: Without dead ends: 145 [2022-03-19 03:42:30,294 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=49, Invalid=190, Unknown=1, NotChecked=0, Total=240 [2022-03-19 03:42:30,295 INFO L912 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:42:30,295 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 94 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 12 Unchecked, 0.4s Time] [2022-03-19 03:42:30,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-19 03:42:30,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 124. [2022-03-19 03:42:30,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 97 states have (on average 1.1030927835051547) internal successors, (107), 97 states have internal predecessors, (107), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 03:42:30,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2022-03-19 03:42:30,337 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 52 [2022-03-19 03:42:30,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:42:30,337 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2022-03-19 03:42:30,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-19 03:42:30,337 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2022-03-19 03:42:30,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-19 03:42:30,338 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:42:30,338 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:42:30,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 03:42:30,552 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-19 03:42:30,552 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:42:30,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:42:30,552 INFO L85 PathProgramCache]: Analyzing trace with hash 92500749, now seen corresponding path program 5 times [2022-03-19 03:42:30,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:42:30,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1838296128] [2022-03-19 03:42:30,558 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:42:30,558 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:42:30,558 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:42:30,558 INFO L85 PathProgramCache]: Analyzing trace with hash 92500749, now seen corresponding path program 6 times [2022-03-19 03:42:30,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:42:30,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491238948] [2022-03-19 03:42:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:42:30,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:42:30,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:42:30,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2128210311] [2022-03-19 03:42:30,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:42:30,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:42:30,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:42:30,565 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:42:30,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 03:42:30,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 03:42:30,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:42:30,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 03:42:30,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:42:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:42:31,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:42:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 03:42:32,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:42:32,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491238948] [2022-03-19 03:42:32,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:42:32,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128210311] [2022-03-19 03:42:32,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128210311] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:42:32,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:42:32,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 03:42:32,031 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:42:32,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1838296128] [2022-03-19 03:42:32,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1838296128] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:42:32,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:42:32,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 03:42:32,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533101650] [2022-03-19 03:42:32,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:42:32,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 03:42:32,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:42:32,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 03:42:32,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 03:42:32,033 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 03:42:32,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:42:32,474 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2022-03-19 03:42:32,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 03:42:32,474 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 53 [2022-03-19 03:42:32,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:42:32,475 INFO L225 Difference]: With dead ends: 153 [2022-03-19 03:42:32,475 INFO L226 Difference]: Without dead ends: 147 [2022-03-19 03:42:32,475 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-19 03:42:32,476 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:42:32,476 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 97 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:42:32,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-19 03:42:32,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2022-03-19 03:42:32,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 113 states have (on average 1.0973451327433628) internal successors, (124), 113 states have internal predecessors, (124), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 03:42:32,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 154 transitions. [2022-03-19 03:42:32,516 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 154 transitions. Word has length 53 [2022-03-19 03:42:32,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:42:32,516 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 154 transitions. [2022-03-19 03:42:32,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 03:42:32,517 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 154 transitions. [2022-03-19 03:42:32,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-19 03:42:32,517 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:42:32,517 INFO L500 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:42:32,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 03:42:32,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-19 03:42:32,741 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:42:32,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:42:32,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1555087693, now seen corresponding path program 7 times [2022-03-19 03:42:32,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:42:32,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [457097290] [2022-03-19 03:42:32,744 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:42:32,745 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:42:32,745 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:42:32,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1555087693, now seen corresponding path program 8 times [2022-03-19 03:42:32,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:42:32,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578421957] [2022-03-19 03:42:32,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:42:32,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:42:32,750 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:42:32,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993392509] [2022-03-19 03:42:32,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:42:32,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:42:32,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:42:32,753 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:42:32,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 03:42:32,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:42:32,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:42:32,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 03:42:32,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:42:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:42:33,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:42:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 70 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-19 03:42:34,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:42:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578421957] [2022-03-19 03:42:34,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:42:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993392509] [2022-03-19 03:42:34,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993392509] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:42:34,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:42:34,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 03:42:34,522 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:42:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [457097290] [2022-03-19 03:42:34,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [457097290] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:42:34,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:42:34,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 03:42:34,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282814558] [2022-03-19 03:42:34,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:42:34,523 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 03:42:34,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:42:34,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 03:42:34,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 03:42:34,524 INFO L87 Difference]: Start difference. First operand 144 states and 154 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 03:42:35,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:42:35,102 INFO L93 Difference]: Finished difference Result 173 states and 185 transitions. [2022-03-19 03:42:35,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 03:42:35,102 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 63 [2022-03-19 03:42:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:42:35,103 INFO L225 Difference]: With dead ends: 173 [2022-03-19 03:42:35,103 INFO L226 Difference]: Without dead ends: 167 [2022-03-19 03:42:35,104 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-03-19 03:42:35,104 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:42:35,104 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 106 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:42:35,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-19 03:42:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2022-03-19 03:42:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 129 states have (on average 1.1007751937984496) internal successors, (142), 129 states have internal predecessors, (142), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 03:42:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 176 transitions. [2022-03-19 03:42:35,172 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 176 transitions. Word has length 63 [2022-03-19 03:42:35,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:42:35,172 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 176 transitions. [2022-03-19 03:42:35,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 03:42:35,172 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 176 transitions. [2022-03-19 03:42:35,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 03:42:35,173 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:42:35,173 INFO L500 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:42:35,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-19 03:42:35,398 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-19 03:42:35,398 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:42:35,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:42:35,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1195458445, now seen corresponding path program 9 times [2022-03-19 03:42:35,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:42:35,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1973107830] [2022-03-19 03:42:35,402 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:42:35,402 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:42:35,402 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:42:35,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1195458445, now seen corresponding path program 10 times [2022-03-19 03:42:35,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:42:35,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75341262] [2022-03-19 03:42:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:42:35,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:42:35,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:42:35,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901472986] [2022-03-19 03:42:35,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:42:35,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:42:35,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:42:35,410 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:42:35,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 03:42:35,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:42:35,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:42:35,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 03:42:35,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:42:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 12 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:42:36,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:42:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 12 proven. 102 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-19 03:42:37,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:42:37,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75341262] [2022-03-19 03:42:37,736 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:42:37,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901472986] [2022-03-19 03:42:37,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901472986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:42:37,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:42:37,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 03:42:37,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:42:37,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1973107830] [2022-03-19 03:42:37,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1973107830] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:42:37,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:42:37,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 03:42:37,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325137820] [2022-03-19 03:42:37,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:42:37,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 03:42:37,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:42:37,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 03:42:37,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 03:42:37,738 INFO L87 Difference]: Start difference. First operand 164 states and 176 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 03:42:38,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:42:38,346 INFO L93 Difference]: Finished difference Result 193 states and 207 transitions. [2022-03-19 03:42:38,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 03:42:38,346 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 73 [2022-03-19 03:42:38,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:42:38,347 INFO L225 Difference]: With dead ends: 193 [2022-03-19 03:42:38,347 INFO L226 Difference]: Without dead ends: 187 [2022-03-19 03:42:38,348 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-03-19 03:42:38,348 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:42:38,349 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 129 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:42:38,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-19 03:42:38,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2022-03-19 03:42:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 145 states have (on average 1.103448275862069) internal successors, (160), 145 states have internal predecessors, (160), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 03:42:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 198 transitions. [2022-03-19 03:42:38,415 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 198 transitions. Word has length 73 [2022-03-19 03:42:38,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:42:38,415 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 198 transitions. [2022-03-19 03:42:38,415 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 03:42:38,415 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 198 transitions. [2022-03-19 03:42:38,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-19 03:42:38,416 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:42:38,416 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:42:38,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 03:42:38,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-19 03:42:38,633 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:42:38,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:42:38,633 INFO L85 PathProgramCache]: Analyzing trace with hash 116977101, now seen corresponding path program 11 times [2022-03-19 03:42:38,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:42:38,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1919523106] [2022-03-19 03:42:38,637 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:42:38,637 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:42:38,637 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:42:38,637 INFO L85 PathProgramCache]: Analyzing trace with hash 116977101, now seen corresponding path program 12 times [2022-03-19 03:42:38,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:42:38,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793836653] [2022-03-19 03:42:38,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:42:38,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:42:38,646 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:42:38,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406818708] [2022-03-19 03:42:38,646 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:42:38,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:42:38,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:42:38,658 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:42:38,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 03:42:38,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 03:42:38,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:42:38,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 03:42:38,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:42:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 14 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:42:40,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:42:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 14 proven. 140 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-19 03:42:41,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:42:41,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793836653] [2022-03-19 03:42:41,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:42:41,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406818708] [2022-03-19 03:42:41,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406818708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:42:41,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:42:41,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 03:42:41,394 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:42:41,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1919523106] [2022-03-19 03:42:41,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1919523106] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:42:41,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:42:41,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 03:42:41,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86565460] [2022-03-19 03:42:41,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:42:41,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 03:42:41,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:42:41,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 03:42:41,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 03:42:41,395 INFO L87 Difference]: Start difference. First operand 184 states and 198 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 03:42:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:42:42,032 INFO L93 Difference]: Finished difference Result 213 states and 229 transitions. [2022-03-19 03:42:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 03:42:42,032 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 83 [2022-03-19 03:42:42,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:42:42,033 INFO L225 Difference]: With dead ends: 213 [2022-03-19 03:42:42,033 INFO L226 Difference]: Without dead ends: 207 [2022-03-19 03:42:42,033 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2022-03-19 03:42:42,034 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 24 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 03:42:42,034 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 124 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 03:42:42,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-19 03:42:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2022-03-19 03:42:42,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 161 states have (on average 1.1055900621118013) internal successors, (178), 161 states have internal predecessors, (178), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-19 03:42:42,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 220 transitions. [2022-03-19 03:42:42,127 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 220 transitions. Word has length 83 [2022-03-19 03:42:42,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:42:42,127 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 220 transitions. [2022-03-19 03:42:42,127 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 10 states have internal predecessors, (65), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 03:42:42,127 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 220 transitions. [2022-03-19 03:42:42,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-19 03:42:42,128 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:42:42,128 INFO L500 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:42:42,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 03:42:42,346 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-19 03:42:42,350 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:42:42,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:42:42,350 INFO L85 PathProgramCache]: Analyzing trace with hash 2023476237, now seen corresponding path program 13 times [2022-03-19 03:42:42,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:42:42,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1930885751] [2022-03-19 03:42:42,352 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:42:42,353 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:42:42,353 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:42:42,353 INFO L85 PathProgramCache]: Analyzing trace with hash 2023476237, now seen corresponding path program 14 times [2022-03-19 03:42:42,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:42:42,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301764614] [2022-03-19 03:42:42,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:42:42,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:42:42,358 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:42:42,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577367726] [2022-03-19 03:42:42,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:42:42,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:42:42,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:42:42,371 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:42:42,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 03:42:42,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:42:42,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:42:42,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 03:42:42,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:42:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 16 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:42:43,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:42:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 16 proven. 184 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-19 03:42:45,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:42:45,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301764614] [2022-03-19 03:42:45,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:42:45,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577367726] [2022-03-19 03:42:45,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577367726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:42:45,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:42:45,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-19 03:42:45,321 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:42:45,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1930885751] [2022-03-19 03:42:45,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1930885751] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:42:45,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:42:45,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 03:42:45,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320518021] [2022-03-19 03:42:45,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:42:45,321 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 03:42:45,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:42:45,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 03:42:45,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-19 03:42:45,322 INFO L87 Difference]: Start difference. First operand 204 states and 220 transitions. Second operand has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 03:42:46,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:42:46,237 INFO L93 Difference]: Finished difference Result 233 states and 251 transitions. [2022-03-19 03:42:46,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 03:42:46,238 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 93 [2022-03-19 03:42:46,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:42:46,239 INFO L225 Difference]: With dead ends: 233 [2022-03-19 03:42:46,239 INFO L226 Difference]: Without dead ends: 227 [2022-03-19 03:42:46,240 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=363, Invalid=507, Unknown=0, NotChecked=0, Total=870 [2022-03-19 03:42:46,241 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 03:42:46,241 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 140 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 03:42:46,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-19 03:42:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2022-03-19 03:42:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 177 states have (on average 1.1073446327683616) internal successors, (196), 177 states have internal predecessors, (196), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-19 03:42:46,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 242 transitions. [2022-03-19 03:42:46,340 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 242 transitions. Word has length 93 [2022-03-19 03:42:46,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:42:46,340 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 242 transitions. [2022-03-19 03:42:46,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.083333333333333) internal successors, (73), 11 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 03:42:46,341 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 242 transitions. [2022-03-19 03:42:46,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-19 03:42:46,343 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:42:46,343 INFO L500 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:42:46,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 03:42:46,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:42:46,571 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:42:46,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:42:46,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1408096845, now seen corresponding path program 15 times [2022-03-19 03:42:46,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:42:46,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [449935745] [2022-03-19 03:42:46,575 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:42:46,575 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:42:46,575 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:42:46,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1408096845, now seen corresponding path program 16 times [2022-03-19 03:42:46,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:42:46,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119647437] [2022-03-19 03:42:46,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:42:46,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:42:46,581 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:42:46,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210605641] [2022-03-19 03:42:46,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:42:46,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:42:46,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:42:46,583 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:42:46,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 03:42:46,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:42:46,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:42:46,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 03:42:46,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:42:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 18 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:42:48,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:42:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 18 proven. 234 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 03:42:50,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:42:50,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119647437] [2022-03-19 03:42:50,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:42:50,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210605641] [2022-03-19 03:42:50,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210605641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:42:50,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:42:50,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-19 03:42:50,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:42:50,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [449935745] [2022-03-19 03:42:50,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [449935745] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:42:50,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:42:50,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 03:42:50,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523708300] [2022-03-19 03:42:50,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:42:50,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 03:42:50,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:42:50,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 03:42:50,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-19 03:42:50,041 INFO L87 Difference]: Start difference. First operand 224 states and 242 transitions. Second operand has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 states have internal predecessors, (81), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 03:42:51,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:42:51,031 INFO L93 Difference]: Finished difference Result 253 states and 273 transitions. [2022-03-19 03:42:51,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-19 03:42:51,032 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 states have internal predecessors, (81), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 103 [2022-03-19 03:42:51,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:42:51,033 INFO L225 Difference]: With dead ends: 253 [2022-03-19 03:42:51,033 INFO L226 Difference]: Without dead ends: 247 [2022-03-19 03:42:51,033 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-03-19 03:42:51,034 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 03:42:51,034 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 149 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 03:42:51,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-19 03:42:51,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 244. [2022-03-19 03:42:51,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 193 states have (on average 1.1088082901554404) internal successors, (214), 193 states have internal predecessors, (214), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-19 03:42:51,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 264 transitions. [2022-03-19 03:42:51,093 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 264 transitions. Word has length 103 [2022-03-19 03:42:51,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:42:51,094 INFO L478 AbstractCegarLoop]: Abstraction has 244 states and 264 transitions. [2022-03-19 03:42:51,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.230769230769231) internal successors, (81), 12 states have internal predecessors, (81), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 03:42:51,094 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 264 transitions. [2022-03-19 03:42:51,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-19 03:42:51,095 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:42:51,095 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:42:51,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-19 03:42:51,314 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-19 03:42:51,315 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:42:51,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:42:51,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1806899341, now seen corresponding path program 17 times [2022-03-19 03:42:51,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:42:51,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [787860700] [2022-03-19 03:42:51,317 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:42:51,317 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:42:51,317 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:42:51,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1806899341, now seen corresponding path program 18 times [2022-03-19 03:42:51,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:42:51,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035488006] [2022-03-19 03:42:51,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:42:51,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:42:51,323 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:42:51,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951404937] [2022-03-19 03:42:51,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:42:51,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:42:51,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:42:51,324 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:42:51,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 03:42:51,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-19 03:42:51,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:42:51,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 03:42:51,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:42:53,063 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 20 proven. 470 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:42:53,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:42:55,491 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 20 proven. 290 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-19 03:42:55,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:42:55,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035488006] [2022-03-19 03:42:55,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:42:55,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951404937] [2022-03-19 03:42:55,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951404937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:42:55,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:42:55,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-19 03:42:55,494 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:42:55,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [787860700] [2022-03-19 03:42:55,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [787860700] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:42:55,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:42:55,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 03:42:55,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574538623] [2022-03-19 03:42:55,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:42:55,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 03:42:55,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:42:55,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 03:42:55,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-19 03:42:55,496 INFO L87 Difference]: Start difference. First operand 244 states and 264 transitions. Second operand has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 13 states have internal predecessors, (89), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 03:42:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:42:56,671 INFO L93 Difference]: Finished difference Result 273 states and 295 transitions. [2022-03-19 03:42:56,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-19 03:42:56,671 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 13 states have internal predecessors, (89), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 113 [2022-03-19 03:42:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:42:56,673 INFO L225 Difference]: With dead ends: 273 [2022-03-19 03:42:56,673 INFO L226 Difference]: Without dead ends: 267 [2022-03-19 03:42:56,673 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=531, Invalid=729, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 03:42:56,674 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:42:56,674 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 165 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 03:42:56,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-19 03:42:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 264. [2022-03-19 03:42:56,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 209 states have (on average 1.1100478468899522) internal successors, (232), 209 states have internal predecessors, (232), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-19 03:42:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 286 transitions. [2022-03-19 03:42:56,751 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 286 transitions. Word has length 113 [2022-03-19 03:42:56,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:42:56,751 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 286 transitions. [2022-03-19 03:42:56,751 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.357142857142857) internal successors, (89), 13 states have internal predecessors, (89), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 03:42:56,751 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 286 transitions. [2022-03-19 03:42:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-19 03:42:56,752 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:42:56,752 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:42:56,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 03:42:56,968 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:42:56,969 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:42:56,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:42:56,969 INFO L85 PathProgramCache]: Analyzing trace with hash -307263795, now seen corresponding path program 19 times [2022-03-19 03:42:56,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:42:56,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1778989230] [2022-03-19 03:42:56,972 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:42:56,972 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:42:56,972 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:42:56,972 INFO L85 PathProgramCache]: Analyzing trace with hash -307263795, now seen corresponding path program 20 times [2022-03-19 03:42:56,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:42:56,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515647081] [2022-03-19 03:42:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:42:56,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:42:56,980 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:42:56,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [702564310] [2022-03-19 03:42:56,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:42:56,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:42:56,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:42:56,981 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:42:56,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 03:42:57,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:42:57,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:42:57,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 03:42:57,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:42:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 22 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:42:59,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:43:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 22 proven. 352 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-19 03:43:01,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:43:01,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515647081] [2022-03-19 03:43:01,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:43:01,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702564310] [2022-03-19 03:43:01,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702564310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:43:01,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:43:01,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-19 03:43:01,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:43:01,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1778989230] [2022-03-19 03:43:01,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1778989230] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:43:01,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:43:01,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 03:43:01,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160066184] [2022-03-19 03:43:01,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:43:01,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 03:43:01,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:43:01,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 03:43:01,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-19 03:43:01,698 INFO L87 Difference]: Start difference. First operand 264 states and 286 transitions. Second operand has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 14 states have internal predecessors, (97), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 03:43:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:43:02,973 INFO L93 Difference]: Finished difference Result 293 states and 317 transitions. [2022-03-19 03:43:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-19 03:43:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 14 states have internal predecessors, (97), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 123 [2022-03-19 03:43:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:43:02,975 INFO L225 Difference]: With dead ends: 293 [2022-03-19 03:43:02,975 INFO L226 Difference]: Without dead ends: 287 [2022-03-19 03:43:02,976 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=627, Invalid=855, Unknown=0, NotChecked=0, Total=1482 [2022-03-19 03:43:02,976 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 43 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:43:02,977 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 160 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 03:43:02,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-19 03:43:03,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 284. [2022-03-19 03:43:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 225 states have (on average 1.1111111111111112) internal successors, (250), 225 states have internal predecessors, (250), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-19 03:43:03,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 308 transitions. [2022-03-19 03:43:03,059 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 308 transitions. Word has length 123 [2022-03-19 03:43:03,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:43:03,060 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 308 transitions. [2022-03-19 03:43:03,060 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.466666666666667) internal successors, (97), 14 states have internal predecessors, (97), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 03:43:03,060 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 308 transitions. [2022-03-19 03:43:03,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-19 03:43:03,060 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:43:03,060 INFO L500 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:43:03,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 03:43:03,277 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:43:03,277 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:43:03,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:43:03,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1566104307, now seen corresponding path program 21 times [2022-03-19 03:43:03,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:43:03,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [917016290] [2022-03-19 03:43:03,280 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:43:03,280 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:43:03,280 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:43:03,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1566104307, now seen corresponding path program 22 times [2022-03-19 03:43:03,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:43:03,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715011627] [2022-03-19 03:43:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:43:03,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:43:03,285 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:43:03,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444587398] [2022-03-19 03:43:03,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:43:03,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:43:03,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:43:03,287 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:43:03,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 03:43:03,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:43:03,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:43:03,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 03:43:03,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:43:05,318 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 24 proven. 684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:43:05,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:43:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 24 proven. 420 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-19 03:43:08,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:43:08,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715011627] [2022-03-19 03:43:08,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:43:08,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444587398] [2022-03-19 03:43:08,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444587398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:43:08,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:43:08,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-19 03:43:08,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:43:08,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [917016290] [2022-03-19 03:43:08,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [917016290] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:43:08,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:43:08,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 03:43:08,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122546241] [2022-03-19 03:43:08,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:43:08,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 03:43:08,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:43:08,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 03:43:08,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-19 03:43:08,255 INFO L87 Difference]: Start difference. First operand 284 states and 308 transitions. Second operand has 16 states, 16 states have (on average 6.5625) internal successors, (105), 15 states have internal predecessors, (105), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 03:43:09,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:43:09,700 INFO L93 Difference]: Finished difference Result 313 states and 339 transitions. [2022-03-19 03:43:09,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-19 03:43:09,700 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 15 states have internal predecessors, (105), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 133 [2022-03-19 03:43:09,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:43:09,702 INFO L225 Difference]: With dead ends: 313 [2022-03-19 03:43:09,702 INFO L226 Difference]: Without dead ends: 307 [2022-03-19 03:43:09,703 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=731, Invalid=991, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 03:43:09,703 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 03:43:09,703 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 190 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 03:43:09,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-03-19 03:43:09,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 304. [2022-03-19 03:43:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 241 states have (on average 1.112033195020747) internal successors, (268), 241 states have internal predecessors, (268), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-19 03:43:09,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 330 transitions. [2022-03-19 03:43:09,818 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 330 transitions. Word has length 133 [2022-03-19 03:43:09,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:43:09,818 INFO L478 AbstractCegarLoop]: Abstraction has 304 states and 330 transitions. [2022-03-19 03:43:09,818 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.5625) internal successors, (105), 15 states have internal predecessors, (105), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-19 03:43:09,819 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 330 transitions. [2022-03-19 03:43:09,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-19 03:43:09,819 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:43:09,819 INFO L500 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:43:09,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-19 03:43:10,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-19 03:43:10,043 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:43:10,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:43:10,044 INFO L85 PathProgramCache]: Analyzing trace with hash 777909069, now seen corresponding path program 23 times [2022-03-19 03:43:10,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:43:10,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1769719835] [2022-03-19 03:43:10,046 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:43:10,046 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:43:10,047 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:43:10,047 INFO L85 PathProgramCache]: Analyzing trace with hash 777909069, now seen corresponding path program 24 times [2022-03-19 03:43:10,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:43:10,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847215131] [2022-03-19 03:43:10,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:43:10,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:43:10,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:43:10,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581385899] [2022-03-19 03:43:10,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:43:10,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:43:10,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:43:10,053 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:43:10,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 03:43:10,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-03-19 03:43:10,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:43:10,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 03:43:10,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:43:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 26 proven. 806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:43:12,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:43:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 26 proven. 494 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-03-19 03:43:15,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:43:15,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847215131] [2022-03-19 03:43:15,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:43:15,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581385899] [2022-03-19 03:43:15,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581385899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:43:15,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:43:15,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-19 03:43:15,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:43:15,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1769719835] [2022-03-19 03:43:15,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1769719835] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:43:15,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:43:15,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 03:43:15,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723058178] [2022-03-19 03:43:15,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:43:15,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 03:43:15,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:43:15,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 03:43:15,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-19 03:43:15,407 INFO L87 Difference]: Start difference. First operand 304 states and 330 transitions. Second operand has 17 states, 17 states have (on average 6.647058823529412) internal successors, (113), 16 states have internal predecessors, (113), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 03:43:17,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:43:17,037 INFO L93 Difference]: Finished difference Result 333 states and 361 transitions. [2022-03-19 03:43:17,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-19 03:43:17,037 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.647058823529412) internal successors, (113), 16 states have internal predecessors, (113), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 143 [2022-03-19 03:43:17,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:43:17,039 INFO L225 Difference]: With dead ends: 333 [2022-03-19 03:43:17,039 INFO L226 Difference]: Without dead ends: 327 [2022-03-19 03:43:17,040 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=843, Invalid=1137, Unknown=0, NotChecked=0, Total=1980 [2022-03-19 03:43:17,040 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 53 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 03:43:17,040 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 185 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 03:43:17,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-03-19 03:43:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 324. [2022-03-19 03:43:17,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 257 states have (on average 1.11284046692607) internal successors, (286), 257 states have internal predecessors, (286), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-19 03:43:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 352 transitions. [2022-03-19 03:43:17,166 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 352 transitions. Word has length 143 [2022-03-19 03:43:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:43:17,166 INFO L478 AbstractCegarLoop]: Abstraction has 324 states and 352 transitions. [2022-03-19 03:43:17,166 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.647058823529412) internal successors, (113), 16 states have internal predecessors, (113), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-19 03:43:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 352 transitions. [2022-03-19 03:43:17,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-19 03:43:17,168 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:43:17,168 INFO L500 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:43:17,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-19 03:43:17,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-19 03:43:17,374 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:43:17,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:43:17,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1335357837, now seen corresponding path program 25 times [2022-03-19 03:43:17,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:43:17,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1527499507] [2022-03-19 03:43:17,378 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:43:17,378 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:43:17,378 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:43:17,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1335357837, now seen corresponding path program 26 times [2022-03-19 03:43:17,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:43:17,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965070555] [2022-03-19 03:43:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:43:17,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:43:17,386 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:43:17,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461105502] [2022-03-19 03:43:17,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:43:17,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:43:17,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:43:17,402 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:43:17,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 03:43:17,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:43:17,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:43:17,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-19 03:43:17,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:43:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 28 proven. 938 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:43:20,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:43:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 28 proven. 574 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-03-19 03:43:23,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:43:23,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965070555] [2022-03-19 03:43:23,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:43:23,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461105502] [2022-03-19 03:43:23,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461105502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:43:23,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:43:23,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-19 03:43:23,503 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:43:23,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1527499507] [2022-03-19 03:43:23,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1527499507] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:43:23,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:43:23,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 03:43:23,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691894768] [2022-03-19 03:43:23,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:43:23,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 03:43:23,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:43:23,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 03:43:23,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-19 03:43:23,504 INFO L87 Difference]: Start difference. First operand 324 states and 352 transitions. Second operand has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 17 states have internal predecessors, (121), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 03:43:25,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:43:25,266 INFO L93 Difference]: Finished difference Result 353 states and 383 transitions. [2022-03-19 03:43:25,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-19 03:43:25,266 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 17 states have internal predecessors, (121), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 153 [2022-03-19 03:43:25,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:43:25,267 INFO L225 Difference]: With dead ends: 353 [2022-03-19 03:43:25,267 INFO L226 Difference]: Without dead ends: 347 [2022-03-19 03:43:25,268 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=963, Invalid=1293, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 03:43:25,268 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 45 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 03:43:25,268 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 201 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 03:43:25,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-19 03:43:25,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 344. [2022-03-19 03:43:25,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 273 states have (on average 1.1135531135531136) internal successors, (304), 273 states have internal predecessors, (304), 36 states have call successors, (36), 36 states have call predecessors, (36), 34 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-19 03:43:25,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 374 transitions. [2022-03-19 03:43:25,357 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 374 transitions. Word has length 153 [2022-03-19 03:43:25,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:43:25,358 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 374 transitions. [2022-03-19 03:43:25,358 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.722222222222222) internal successors, (121), 17 states have internal predecessors, (121), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 03:43:25,358 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 374 transitions. [2022-03-19 03:43:25,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-19 03:43:25,359 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:43:25,359 INFO L500 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:43:25,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-19 03:43:25,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-19 03:43:25,576 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:43:25,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:43:25,576 INFO L85 PathProgramCache]: Analyzing trace with hash 538517453, now seen corresponding path program 27 times [2022-03-19 03:43:25,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:43:25,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1407435513] [2022-03-19 03:43:25,579 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:43:25,579 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:43:25,579 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:43:25,579 INFO L85 PathProgramCache]: Analyzing trace with hash 538517453, now seen corresponding path program 28 times [2022-03-19 03:43:25,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:43:25,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224123378] [2022-03-19 03:43:25,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:43:25,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:43:25,585 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:43:25,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201167832] [2022-03-19 03:43:25,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:43:25,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:43:25,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:43:25,608 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:43:25,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 03:43:25,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:43:25,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:43:25,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-19 03:43:25,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:43:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 30 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:43:28,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:43:32,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 30 proven. 660 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 03:43:32,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:43:32,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224123378] [2022-03-19 03:43:32,420 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:43:32,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201167832] [2022-03-19 03:43:32,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201167832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:43:32,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:43:32,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-19 03:43:32,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:43:32,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1407435513] [2022-03-19 03:43:32,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1407435513] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:43:32,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:43:32,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 03:43:32,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945749047] [2022-03-19 03:43:32,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:43:32,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 03:43:32,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:43:32,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 03:43:32,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-19 03:43:32,422 INFO L87 Difference]: Start difference. First operand 344 states and 374 transitions. Second operand has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 03:43:34,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:43:34,245 INFO L93 Difference]: Finished difference Result 373 states and 405 transitions. [2022-03-19 03:43:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-19 03:43:34,246 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 163 [2022-03-19 03:43:34,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:43:34,248 INFO L225 Difference]: With dead ends: 373 [2022-03-19 03:43:34,248 INFO L226 Difference]: Without dead ends: 367 [2022-03-19 03:43:34,249 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1091, Invalid=1459, Unknown=0, NotChecked=0, Total=2550 [2022-03-19 03:43:34,250 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 03:43:34,250 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 217 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 03:43:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-03-19 03:43:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 364. [2022-03-19 03:43:34,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 289 states have (on average 1.1141868512110726) internal successors, (322), 289 states have internal predecessors, (322), 38 states have call successors, (38), 38 states have call predecessors, (38), 36 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-19 03:43:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 396 transitions. [2022-03-19 03:43:34,393 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 396 transitions. Word has length 163 [2022-03-19 03:43:34,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:43:34,394 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 396 transitions. [2022-03-19 03:43:34,394 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 03:43:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 396 transitions. [2022-03-19 03:43:34,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-19 03:43:34,395 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:43:34,395 INFO L500 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:43:34,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-19 03:43:34,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:43:34,610 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:43:34,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:43:34,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1420131853, now seen corresponding path program 29 times [2022-03-19 03:43:34,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:43:34,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1362587834] [2022-03-19 03:43:34,614 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:43:34,614 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:43:34,614 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:43:34,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1420131853, now seen corresponding path program 30 times [2022-03-19 03:43:34,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:43:34,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153369879] [2022-03-19 03:43:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:43:34,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:43:34,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:43:34,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732693276] [2022-03-19 03:43:34,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:43:34,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:43:34,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:43:34,623 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:43:34,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 03:43:35,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-03-19 03:43:35,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:43:35,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 03:43:35,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:43:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 32 proven. 1232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:43:38,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:43:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 32 proven. 752 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-19 03:43:42,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:43:42,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153369879] [2022-03-19 03:43:42,587 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:43:42,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732693276] [2022-03-19 03:43:42,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732693276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:43:42,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:43:42,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-19 03:43:42,588 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:43:42,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1362587834] [2022-03-19 03:43:42,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1362587834] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:43:42,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:43:42,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 03:43:42,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928176839] [2022-03-19 03:43:42,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:43:42,588 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 03:43:42,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:43:42,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 03:43:42,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-19 03:43:42,589 INFO L87 Difference]: Start difference. First operand 364 states and 396 transitions. Second operand has 20 states, 20 states have (on average 6.85) internal successors, (137), 19 states have internal predecessors, (137), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 03:43:44,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:43:44,592 INFO L93 Difference]: Finished difference Result 393 states and 427 transitions. [2022-03-19 03:43:44,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-19 03:43:44,592 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.85) internal successors, (137), 19 states have internal predecessors, (137), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 173 [2022-03-19 03:43:44,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:43:44,594 INFO L225 Difference]: With dead ends: 393 [2022-03-19 03:43:44,594 INFO L226 Difference]: Without dead ends: 387 [2022-03-19 03:43:44,594 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1227, Invalid=1635, Unknown=0, NotChecked=0, Total=2862 [2022-03-19 03:43:44,595 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 51 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 03:43:44,595 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 212 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 03:43:44,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-03-19 03:43:44,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 384. [2022-03-19 03:43:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 305 states have (on average 1.1147540983606556) internal successors, (340), 305 states have internal predecessors, (340), 40 states have call successors, (40), 40 states have call predecessors, (40), 38 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-19 03:43:44,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 418 transitions. [2022-03-19 03:43:44,703 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 418 transitions. Word has length 173 [2022-03-19 03:43:44,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:43:44,703 INFO L478 AbstractCegarLoop]: Abstraction has 384 states and 418 transitions. [2022-03-19 03:43:44,703 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.85) internal successors, (137), 19 states have internal predecessors, (137), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 03:43:44,703 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 418 transitions. [2022-03-19 03:43:44,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-19 03:43:44,704 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:43:44,704 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:43:44,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-19 03:43:44,910 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-19 03:43:44,910 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:43:44,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:43:44,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2097220685, now seen corresponding path program 31 times [2022-03-19 03:43:44,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:43:44,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1671845995] [2022-03-19 03:43:44,914 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:43:44,914 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:43:44,914 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:43:44,914 INFO L85 PathProgramCache]: Analyzing trace with hash 2097220685, now seen corresponding path program 32 times [2022-03-19 03:43:44,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:43:44,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326598408] [2022-03-19 03:43:44,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:43:44,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:43:44,924 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:43:44,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2392707] [2022-03-19 03:43:44,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:43:44,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:43:44,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:43:44,926 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:43:44,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 03:43:45,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:43:45,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:43:45,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 03:43:45,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:43:47,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 34 proven. 1394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:43:47,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:43:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 34 proven. 850 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-03-19 03:43:52,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:43:52,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326598408] [2022-03-19 03:43:52,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:43:52,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2392707] [2022-03-19 03:43:52,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2392707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:43:52,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:43:52,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-19 03:43:52,093 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:43:52,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1671845995] [2022-03-19 03:43:52,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1671845995] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:43:52,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:43:52,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-19 03:43:52,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616239039] [2022-03-19 03:43:52,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:43:52,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-19 03:43:52,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:43:52,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-19 03:43:52,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-19 03:43:52,095 INFO L87 Difference]: Start difference. First operand 384 states and 418 transitions. Second operand has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 03:43:54,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:43:54,446 INFO L93 Difference]: Finished difference Result 413 states and 449 transitions. [2022-03-19 03:43:54,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-19 03:43:54,446 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 183 [2022-03-19 03:43:54,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:43:54,448 INFO L225 Difference]: With dead ends: 413 [2022-03-19 03:43:54,448 INFO L226 Difference]: Without dead ends: 407 [2022-03-19 03:43:54,450 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1371, Invalid=1821, Unknown=0, NotChecked=0, Total=3192 [2022-03-19 03:43:54,450 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 62 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 03:43:54,450 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 228 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 03:43:54,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-03-19 03:43:54,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 404. [2022-03-19 03:43:54,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 321 states have (on average 1.115264797507788) internal successors, (358), 321 states have internal predecessors, (358), 42 states have call successors, (42), 42 states have call predecessors, (42), 40 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-19 03:43:54,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 440 transitions. [2022-03-19 03:43:54,622 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 440 transitions. Word has length 183 [2022-03-19 03:43:54,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:43:54,622 INFO L478 AbstractCegarLoop]: Abstraction has 404 states and 440 transitions. [2022-03-19 03:43:54,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 03:43:54,622 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 440 transitions. [2022-03-19 03:43:54,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-19 03:43:54,651 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:43:54,651 INFO L500 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:43:54,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 03:43:54,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 03:43:54,872 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:43:54,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:43:54,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1139788429, now seen corresponding path program 33 times [2022-03-19 03:43:54,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:43:54,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [185234864] [2022-03-19 03:43:54,875 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:43:54,876 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:43:54,876 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:43:54,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1139788429, now seen corresponding path program 34 times [2022-03-19 03:43:54,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:43:54,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558717478] [2022-03-19 03:43:54,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:43:54,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:43:54,884 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:43:54,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43476942] [2022-03-19 03:43:54,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:43:54,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:43:54,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:43:54,888 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:43:54,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 03:43:55,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:43:55,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:43:55,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-19 03:43:55,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:43:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 36 proven. 1566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:43:58,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:44:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 36 proven. 954 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-19 03:44:03,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:44:03,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558717478] [2022-03-19 03:44:03,194 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:44:03,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43476942] [2022-03-19 03:44:03,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43476942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:44:03,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:44:03,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-19 03:44:03,194 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:44:03,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [185234864] [2022-03-19 03:44:03,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [185234864] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:44:03,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:44:03,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-19 03:44:03,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656571357] [2022-03-19 03:44:03,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:44:03,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-19 03:44:03,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:44:03,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-19 03:44:03,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-19 03:44:03,196 INFO L87 Difference]: Start difference. First operand 404 states and 440 transitions. Second operand has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 21 states have internal predecessors, (153), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 03:44:05,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:44:05,630 INFO L93 Difference]: Finished difference Result 433 states and 471 transitions. [2022-03-19 03:44:05,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-19 03:44:05,630 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 21 states have internal predecessors, (153), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 193 [2022-03-19 03:44:05,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:44:05,632 INFO L225 Difference]: With dead ends: 433 [2022-03-19 03:44:05,632 INFO L226 Difference]: Without dead ends: 427 [2022-03-19 03:44:05,633 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1523, Invalid=2017, Unknown=0, NotChecked=0, Total=3540 [2022-03-19 03:44:05,634 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 71 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 03:44:05,634 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 223 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 03:44:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-03-19 03:44:05,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 424. [2022-03-19 03:44:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 337 states have (on average 1.1157270029673592) internal successors, (376), 337 states have internal predecessors, (376), 44 states have call successors, (44), 44 states have call predecessors, (44), 42 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-19 03:44:05,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 462 transitions. [2022-03-19 03:44:05,793 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 462 transitions. Word has length 193 [2022-03-19 03:44:05,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:44:05,794 INFO L478 AbstractCegarLoop]: Abstraction has 424 states and 462 transitions. [2022-03-19 03:44:05,794 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.954545454545454) internal successors, (153), 21 states have internal predecessors, (153), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 03:44:05,794 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 462 transitions. [2022-03-19 03:44:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-19 03:44:05,795 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:44:05,795 INFO L500 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:44:05,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 03:44:06,020 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 03:44:06,020 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:44:06,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:44:06,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1355433779, now seen corresponding path program 35 times [2022-03-19 03:44:06,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:44:06,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [264001355] [2022-03-19 03:44:06,025 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:44:06,025 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:44:06,025 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:44:06,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1355433779, now seen corresponding path program 36 times [2022-03-19 03:44:06,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:44:06,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088028656] [2022-03-19 03:44:06,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:44:06,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:44:06,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:44:06,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534436338] [2022-03-19 03:44:06,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:44:06,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:44:06,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:44:06,033 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:44:06,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 03:44:06,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-03-19 03:44:06,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:44:06,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 03:44:06,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:44:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 38 proven. 1748 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:44:10,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:44:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1786 backedges. 38 proven. 1064 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-03-19 03:44:15,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:44:15,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088028656] [2022-03-19 03:44:15,880 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:44:15,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534436338] [2022-03-19 03:44:15,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534436338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:44:15,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:44:15,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-19 03:44:15,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:44:15,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [264001355] [2022-03-19 03:44:15,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [264001355] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:44:15,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:44:15,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-19 03:44:15,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335690311] [2022-03-19 03:44:15,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:44:15,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-19 03:44:15,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:44:15,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-19 03:44:15,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-19 03:44:15,882 INFO L87 Difference]: Start difference. First operand 424 states and 462 transitions. Second operand has 23 states, 23 states have (on average 7.0) internal successors, (161), 22 states have internal predecessors, (161), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-19 03:44:18,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:44:18,624 INFO L93 Difference]: Finished difference Result 453 states and 493 transitions. [2022-03-19 03:44:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-19 03:44:18,625 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.0) internal successors, (161), 22 states have internal predecessors, (161), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 203 [2022-03-19 03:44:18,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:44:18,627 INFO L225 Difference]: With dead ends: 453 [2022-03-19 03:44:18,627 INFO L226 Difference]: Without dead ends: 447 [2022-03-19 03:44:18,628 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1683, Invalid=2223, Unknown=0, NotChecked=0, Total=3906 [2022-03-19 03:44:18,629 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 65 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 03:44:18,629 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 246 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 03:44:18,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-03-19 03:44:18,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 444. [2022-03-19 03:44:18,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 353 states have (on average 1.1161473087818696) internal successors, (394), 353 states have internal predecessors, (394), 46 states have call successors, (46), 46 states have call predecessors, (46), 44 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-19 03:44:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 484 transitions. [2022-03-19 03:44:18,757 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 484 transitions. Word has length 203 [2022-03-19 03:44:18,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:44:18,757 INFO L478 AbstractCegarLoop]: Abstraction has 444 states and 484 transitions. [2022-03-19 03:44:18,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.0) internal successors, (161), 22 states have internal predecessors, (161), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-19 03:44:18,758 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 484 transitions. [2022-03-19 03:44:18,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-19 03:44:18,759 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:44:18,759 INFO L500 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:44:18,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 03:44:18,965 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-19 03:44:18,966 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:44:18,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:44:18,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1603720973, now seen corresponding path program 37 times [2022-03-19 03:44:18,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:44:18,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1871294670] [2022-03-19 03:44:18,969 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:44:18,970 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:44:18,970 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:44:18,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1603720973, now seen corresponding path program 38 times [2022-03-19 03:44:18,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:44:18,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217455838] [2022-03-19 03:44:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:44:18,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:44:18,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:44:18,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889782076] [2022-03-19 03:44:18,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:44:18,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:44:18,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:44:18,982 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:44:18,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 03:44:19,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:44:19,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:44:19,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 03:44:19,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:44:22,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 40 proven. 1940 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:44:22,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:44:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 40 proven. 1180 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-19 03:44:28,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:44:28,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217455838] [2022-03-19 03:44:28,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:44:28,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889782076] [2022-03-19 03:44:28,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889782076] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:44:28,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:44:28,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-19 03:44:28,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:44:28,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1871294670] [2022-03-19 03:44:28,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1871294670] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:44:28,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:44:28,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-19 03:44:28,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653646222] [2022-03-19 03:44:28,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:44:28,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-19 03:44:28,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:44:28,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-19 03:44:28,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-19 03:44:28,519 INFO L87 Difference]: Start difference. First operand 444 states and 484 transitions. Second operand has 24 states, 24 states have (on average 7.041666666666667) internal successors, (169), 23 states have internal predecessors, (169), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 03:44:31,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:44:31,314 INFO L93 Difference]: Finished difference Result 473 states and 515 transitions. [2022-03-19 03:44:31,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-19 03:44:31,315 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 7.041666666666667) internal successors, (169), 23 states have internal predecessors, (169), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 213 [2022-03-19 03:44:31,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:44:31,316 INFO L225 Difference]: With dead ends: 473 [2022-03-19 03:44:31,316 INFO L226 Difference]: Without dead ends: 467 [2022-03-19 03:44:31,317 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1851, Invalid=2439, Unknown=0, NotChecked=0, Total=4290 [2022-03-19 03:44:31,318 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 61 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 03:44:31,319 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 276 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 03:44:31,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-03-19 03:44:31,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 464. [2022-03-19 03:44:31,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 369 states have (on average 1.1165311653116532) internal successors, (412), 369 states have internal predecessors, (412), 48 states have call successors, (48), 48 states have call predecessors, (48), 46 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-19 03:44:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 506 transitions. [2022-03-19 03:44:31,475 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 506 transitions. Word has length 213 [2022-03-19 03:44:31,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:44:31,476 INFO L478 AbstractCegarLoop]: Abstraction has 464 states and 506 transitions. [2022-03-19 03:44:31,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.041666666666667) internal successors, (169), 23 states have internal predecessors, (169), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 03:44:31,476 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 506 transitions. [2022-03-19 03:44:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-03-19 03:44:31,477 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:44:31,477 INFO L500 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:44:31,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 03:44:31,692 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:44:31,693 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:44:31,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:44:31,693 INFO L85 PathProgramCache]: Analyzing trace with hash -791206579, now seen corresponding path program 39 times [2022-03-19 03:44:31,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:44:31,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [851637179] [2022-03-19 03:44:31,696 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:44:31,696 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:44:31,696 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:44:31,696 INFO L85 PathProgramCache]: Analyzing trace with hash -791206579, now seen corresponding path program 40 times [2022-03-19 03:44:31,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:44:31,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013230808] [2022-03-19 03:44:31,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:44:31,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:44:31,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:44:31,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1688685487] [2022-03-19 03:44:31,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:44:31,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:44:31,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:44:31,711 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:44:31,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 03:44:31,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:44:31,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:44:31,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-19 03:44:31,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:44:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2184 backedges. 42 proven. 2142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:44:35,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:44:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2184 backedges. 42 proven. 1302 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-19 03:44:41,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:44:41,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013230808] [2022-03-19 03:44:41,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:44:41,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688685487] [2022-03-19 03:44:41,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688685487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:44:41,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:44:41,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-19 03:44:41,860 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:44:41,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [851637179] [2022-03-19 03:44:41,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [851637179] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:44:41,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:44:41,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-19 03:44:41,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604994189] [2022-03-19 03:44:41,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:44:41,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-19 03:44:41,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:44:41,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-19 03:44:41,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-19 03:44:41,862 INFO L87 Difference]: Start difference. First operand 464 states and 506 transitions. Second operand has 25 states, 25 states have (on average 7.08) internal successors, (177), 24 states have internal predecessors, (177), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-19 03:44:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:44:45,087 INFO L93 Difference]: Finished difference Result 493 states and 537 transitions. [2022-03-19 03:44:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-19 03:44:45,088 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 7.08) internal successors, (177), 24 states have internal predecessors, (177), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 223 [2022-03-19 03:44:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:44:45,090 INFO L225 Difference]: With dead ends: 493 [2022-03-19 03:44:45,090 INFO L226 Difference]: Without dead ends: 487 [2022-03-19 03:44:45,091 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2027, Invalid=2665, Unknown=0, NotChecked=0, Total=4692 [2022-03-19 03:44:45,092 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 61 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-19 03:44:45,092 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 271 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-19 03:44:45,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-03-19 03:44:45,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 484. [2022-03-19 03:44:45,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 385 states have (on average 1.1168831168831168) internal successors, (430), 385 states have internal predecessors, (430), 50 states have call successors, (50), 50 states have call predecessors, (50), 48 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-19 03:44:45,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 528 transitions. [2022-03-19 03:44:45,234 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 528 transitions. Word has length 223 [2022-03-19 03:44:45,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:44:45,235 INFO L478 AbstractCegarLoop]: Abstraction has 484 states and 528 transitions. [2022-03-19 03:44:45,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.08) internal successors, (177), 24 states have internal predecessors, (177), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-19 03:44:45,236 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 528 transitions. [2022-03-19 03:44:45,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-03-19 03:44:45,237 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:44:45,237 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:44:45,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-19 03:44:45,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:44:45,452 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:44:45,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:44:45,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1715821683, now seen corresponding path program 41 times [2022-03-19 03:44:45,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:44:45,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [328137350] [2022-03-19 03:44:45,455 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:44:45,455 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:44:45,455 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:44:45,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1715821683, now seen corresponding path program 42 times [2022-03-19 03:44:45,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:44:45,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280219534] [2022-03-19 03:44:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:44:45,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:44:45,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:44:45,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788422949] [2022-03-19 03:44:45,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 03:44:45,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:44:45,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:44:45,464 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:44:45,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 03:44:45,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-03-19 03:44:45,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:44:45,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-19 03:44:45,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:44:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2398 backedges. 44 proven. 2354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:44:49,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:44:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2398 backedges. 44 proven. 1430 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-03-19 03:44:56,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:44:56,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280219534] [2022-03-19 03:44:56,881 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:44:56,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788422949] [2022-03-19 03:44:56,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788422949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:44:56,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:44:56,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-19 03:44:56,881 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:44:56,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [328137350] [2022-03-19 03:44:56,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [328137350] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:44:56,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:44:56,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-19 03:44:56,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260569227] [2022-03-19 03:44:56,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:44:56,882 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-19 03:44:56,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:44:56,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-19 03:44:56,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-19 03:44:56,883 INFO L87 Difference]: Start difference. First operand 484 states and 528 transitions. Second operand has 26 states, 26 states have (on average 7.115384615384615) internal successors, (185), 25 states have internal predecessors, (185), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 03:45:00,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:45:00,168 INFO L93 Difference]: Finished difference Result 513 states and 559 transitions. [2022-03-19 03:45:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-19 03:45:00,168 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 7.115384615384615) internal successors, (185), 25 states have internal predecessors, (185), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 233 [2022-03-19 03:45:00,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:45:00,170 INFO L225 Difference]: With dead ends: 513 [2022-03-19 03:45:00,170 INFO L226 Difference]: Without dead ends: 507 [2022-03-19 03:45:00,171 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=2211, Invalid=2901, Unknown=0, NotChecked=0, Total=5112 [2022-03-19 03:45:00,171 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 81 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 03:45:00,171 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 280 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 03:45:00,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-03-19 03:45:00,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 504. [2022-03-19 03:45:00,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 401 states have (on average 1.1172069825436408) internal successors, (448), 401 states have internal predecessors, (448), 52 states have call successors, (52), 52 states have call predecessors, (52), 50 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-03-19 03:45:00,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 550 transitions. [2022-03-19 03:45:00,367 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 550 transitions. Word has length 233 [2022-03-19 03:45:00,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:45:00,367 INFO L478 AbstractCegarLoop]: Abstraction has 504 states and 550 transitions. [2022-03-19 03:45:00,367 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.115384615384615) internal successors, (185), 25 states have internal predecessors, (185), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-19 03:45:00,368 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 550 transitions. [2022-03-19 03:45:00,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-03-19 03:45:00,369 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:45:00,369 INFO L500 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:45:00,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-19 03:45:00,576 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-19 03:45:00,577 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:45:00,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:45:00,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1408937523, now seen corresponding path program 43 times [2022-03-19 03:45:00,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:45:00,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2019415710] [2022-03-19 03:45:00,580 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:45:00,581 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:45:00,581 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:45:00,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1408937523, now seen corresponding path program 44 times [2022-03-19 03:45:00,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:45:00,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592723967] [2022-03-19 03:45:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:45:00,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:45:00,589 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:45:00,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567518318] [2022-03-19 03:45:00,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 03:45:00,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:45:00,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:45:00,591 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:45:00,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 03:45:00,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 03:45:00,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:45:00,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 03:45:00,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 03:45:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 46 proven. 2576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-19 03:45:05,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 03:45:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2622 backedges. 46 proven. 1564 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-03-19 03:45:12,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 03:45:12,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592723967] [2022-03-19 03:45:12,825 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 03:45:12,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567518318] [2022-03-19 03:45:12,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567518318] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 03:45:12,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 03:45:12,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-03-19 03:45:12,826 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 03:45:12,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2019415710] [2022-03-19 03:45:12,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2019415710] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 03:45:12,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 03:45:12,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-19 03:45:12,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602845260] [2022-03-19 03:45:12,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 03:45:12,826 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-19 03:45:12,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 03:45:12,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-19 03:45:12,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2022-03-19 03:45:12,827 INFO L87 Difference]: Start difference. First operand 504 states and 550 transitions. Second operand has 27 states, 27 states have (on average 7.148148148148148) internal successors, (193), 26 states have internal predecessors, (193), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-19 03:45:16,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 03:45:16,203 INFO L93 Difference]: Finished difference Result 533 states and 581 transitions. [2022-03-19 03:45:16,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-19 03:45:16,204 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 7.148148148148148) internal successors, (193), 26 states have internal predecessors, (193), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 243 [2022-03-19 03:45:16,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 03:45:16,205 INFO L225 Difference]: With dead ends: 533 [2022-03-19 03:45:16,205 INFO L226 Difference]: Without dead ends: 527 [2022-03-19 03:45:16,206 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=2403, Invalid=3147, Unknown=0, NotChecked=0, Total=5550 [2022-03-19 03:45:16,206 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 124 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 03:45:16,206 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 268 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 03:45:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-03-19 03:45:16,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 524. [2022-03-19 03:45:16,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 417 states have (on average 1.1175059952038369) internal successors, (466), 417 states have internal predecessors, (466), 54 states have call successors, (54), 54 states have call predecessors, (54), 52 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-19 03:45:16,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 572 transitions. [2022-03-19 03:45:16,370 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 572 transitions. Word has length 243 [2022-03-19 03:45:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 03:45:16,379 INFO L478 AbstractCegarLoop]: Abstraction has 524 states and 572 transitions. [2022-03-19 03:45:16,379 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 7.148148148148148) internal successors, (193), 26 states have internal predecessors, (193), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-19 03:45:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 572 transitions. [2022-03-19 03:45:16,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-03-19 03:45:16,380 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 03:45:16,380 INFO L500 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 03:45:16,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-19 03:45:16,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-19 03:45:16,595 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 03:45:16,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 03:45:16,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1803866099, now seen corresponding path program 45 times [2022-03-19 03:45:16,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 03:45:16,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [172138918] [2022-03-19 03:45:16,599 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 5 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-19 03:45:16,599 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-03-19 03:45:16,599 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-03-19 03:45:16,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1803866099, now seen corresponding path program 46 times [2022-03-19 03:45:16,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 03:45:16,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688930062] [2022-03-19 03:45:16,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 03:45:16,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 03:45:16,606 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 03:45:16,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171054784] [2022-03-19 03:45:16,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 03:45:16,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 03:45:16,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 03:45:16,607 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 03:45:16,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 03:45:16,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 03:45:16,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 03:45:16,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-19 03:45:16,716 INFO L286 TraceCheckSpWp]: Computing forward predicates...