/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 22:22:43,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 22:22:43,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 22:22:43,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 22:22:43,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 22:22:43,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 22:22:43,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 22:22:43,924 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 22:22:43,930 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 22:22:43,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 22:22:43,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 22:22:43,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 22:22:43,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 22:22:43,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 22:22:43,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 22:22:43,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 22:22:43,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 22:22:43,931 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 22:22:43,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 22:22:43,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 22:22:43,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 22:22:43,932 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 22:22:43,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 22:22:43,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 22:22:43,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 22:22:43,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 22:22:43,933 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 22:22:43,933 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 22:22:43,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 22:22:43,933 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 22:22:43,933 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 22:22:44,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 22:22:44,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 22:22:44,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 22:22:44,087 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 22:22:44,087 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 22:22:44,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound100.c [2022-03-20 22:22:44,124 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c48a5297/15a3f2a7d1414d0e880612aac2c97fc7/FLAGe93862f4f [2022-03-20 22:22:44,490 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 22:22:44,490 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound100.c [2022-03-20 22:22:44,494 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c48a5297/15a3f2a7d1414d0e880612aac2c97fc7/FLAGe93862f4f [2022-03-20 22:22:44,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c48a5297/15a3f2a7d1414d0e880612aac2c97fc7 [2022-03-20 22:22:44,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 22:22:44,505 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 22:22:44,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 22:22:44,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 22:22:44,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 22:22:44,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:22:44" (1/1) ... [2022-03-20 22:22:44,510 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68c39676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:22:44, skipping insertion in model container [2022-03-20 22:22:44,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 10:22:44" (1/1) ... [2022-03-20 22:22:44,514 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 22:22:44,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 22:22:44,631 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/mannadiv_unwindbound100.c[573,586] [2022-03-20 22:22:44,649 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 22:22:44,657 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 22:22:44,666 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/mannadiv_unwindbound100.c[573,586] [2022-03-20 22:22:44,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 22:22:44,684 INFO L208 MainTranslator]: Completed translation [2022-03-20 22:22:44,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:22:44 WrapperNode [2022-03-20 22:22:44,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 22:22:44,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 22:22:44,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 22:22:44,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 22:22:44,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:22:44" (1/1) ... [2022-03-20 22:22:44,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:22:44" (1/1) ... [2022-03-20 22:22:44,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:22:44" (1/1) ... [2022-03-20 22:22:44,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:22:44" (1/1) ... [2022-03-20 22:22:44,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:22:44" (1/1) ... [2022-03-20 22:22:44,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:22:44" (1/1) ... [2022-03-20 22:22:44,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:22:44" (1/1) ... [2022-03-20 22:22:44,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 22:22:44,710 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 22:22:44,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 22:22:44,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 22:22:44,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:22:44" (1/1) ... [2022-03-20 22:22:44,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 22:22:44,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:44,731 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 22:22:44,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 22:22:44,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 22:22:44,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 22:22:44,771 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 22:22:44,771 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 22:22:44,772 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 22:22:44,772 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 22:22:44,772 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 22:22:44,773 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 22:22:44,773 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 22:22:44,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 22:22:44,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 22:22:44,774 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 22:22:44,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 22:22:44,774 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 22:22:44,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 22:22:44,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 22:22:44,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 22:22:44,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 22:22:44,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 22:22:44,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 22:22:44,817 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 22:22:44,818 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 22:22:44,892 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 22:22:44,896 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 22:22:44,896 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 22:22:44,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:22:44 BoogieIcfgContainer [2022-03-20 22:22:44,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 22:22:44,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 22:22:44,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 22:22:44,900 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 22:22:44,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 10:22:44" (1/3) ... [2022-03-20 22:22:44,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae535f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:22:44, skipping insertion in model container [2022-03-20 22:22:44,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 10:22:44" (2/3) ... [2022-03-20 22:22:44,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ae535f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 10:22:44, skipping insertion in model container [2022-03-20 22:22:44,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 10:22:44" (3/3) ... [2022-03-20 22:22:44,902 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound100.c [2022-03-20 22:22:44,905 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 22:22:44,905 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 22:22:44,930 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 22:22:44,934 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 22:22:44,934 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 22:22:44,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 22:22:44,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 22:22:44,948 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:44,949 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:44,949 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:44,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2022-03-20 22:22:44,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:44,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1046403542] [2022-03-20 22:22:44,964 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:44,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 2 times [2022-03-20 22:22:44,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:44,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958272354] [2022-03-20 22:22:44,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:44,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:22:45,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 22:22:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:22:45,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 22:22:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:22:45,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 22:22:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 22:22:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:45,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:45,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958272354] [2022-03-20 22:22:45,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958272354] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:45,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:45,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 22:22:45,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:45,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1046403542] [2022-03-20 22:22:45,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1046403542] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:45,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:45,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 22:22:45,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235568777] [2022-03-20 22:22:45,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:45,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 22:22:45,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:45,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 22:22:45,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 22:22:45,188 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 22:22:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:45,255 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2022-03-20 22:22:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 22:22:45,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 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 22 [2022-03-20 22:22:45,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:45,262 INFO L225 Difference]: With dead ends: 54 [2022-03-20 22:22:45,262 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 22:22:45,264 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 22:22:45,269 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:45,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 35 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:22:45,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 22:22:45,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-03-20 22:22:45,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 22:22:45,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-03-20 22:22:45,299 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-03-20 22:22:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:45,299 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-03-20 22:22:45,299 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 22:22:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-03-20 22:22:45,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 22:22:45,301 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:45,301 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:45,301 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 22:22:45,301 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:45,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:45,303 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2022-03-20 22:22:45,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:45,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1176995139] [2022-03-20 22:22:45,308 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:45,308 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 2 times [2022-03-20 22:22:45,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:45,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313898928] [2022-03-20 22:22:45,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:45,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:45,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:45,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333984124] [2022-03-20 22:22:45,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:22:45,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:45,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:45,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:22:45,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 22:22:45,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 22:22:45,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:45,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 22:22:45,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:45,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 22:22:45,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:45,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313898928] [2022-03-20 22:22:45,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:45,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333984124] [2022-03-20 22:22:45,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333984124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:45,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:45,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 22:22:45,509 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:45,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1176995139] [2022-03-20 22:22:45,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1176995139] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:45,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:45,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 22:22:45,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432645457] [2022-03-20 22:22:45,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:45,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 22:22:45,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:45,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 22:22:45,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 22:22:45,518 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 22:22:45,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:45,534 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-20 22:22:45,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 22:22:45,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 22:22:45,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:45,536 INFO L225 Difference]: With dead ends: 34 [2022-03-20 22:22:45,536 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 22:22:45,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 22:22:45,538 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:45,541 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:22:45,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 22:22:45,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 22:22:45,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 22:22:45,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-20 22:22:45,550 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2022-03-20 22:22:45,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:45,552 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-20 22:22:45,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 22:22:45,552 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-20 22:22:45,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 22:22:45,553 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:45,553 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:45,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 22:22:45,770 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 [2022-03-20 22:22:45,770 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:45,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:45,771 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2022-03-20 22:22:45,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:45,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [421079120] [2022-03-20 22:22:45,773 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:45,776 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 2 times [2022-03-20 22:22:45,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:45,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285940386] [2022-03-20 22:22:45,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:45,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:45,793 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:45,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [128189597] [2022-03-20 22:22:45,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:22:45,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:45,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:45,807 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:22:45,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 22:22:45,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 22:22:45,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:45,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 22:22:45,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:45,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 22:22:45,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:45,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285940386] [2022-03-20 22:22:45,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:45,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128189597] [2022-03-20 22:22:45,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128189597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:45,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:45,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 22:22:45,932 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:45,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [421079120] [2022-03-20 22:22:45,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [421079120] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:45,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:45,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 22:22:45,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069876084] [2022-03-20 22:22:45,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:45,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 22:22:45,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:45,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 22:22:45,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 22:22:45,934 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 22:22:45,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:45,989 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-03-20 22:22:45,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 22:22:45,989 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-20 22:22:45,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:45,991 INFO L225 Difference]: With dead ends: 37 [2022-03-20 22:22:45,991 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 22:22:45,992 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 22:22:45,997 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:45,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 88 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:22:45,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 22:22:46,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-03-20 22:22:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 22:22:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-03-20 22:22:46,003 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-03-20 22:22:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:46,004 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-03-20 22:22:46,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 22:22:46,004 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-03-20 22:22:46,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 22:22:46,004 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:46,004 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:46,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 22:22:46,215 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 [2022-03-20 22:22:46,215 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:46,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2022-03-20 22:22:46,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:46,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1685082185] [2022-03-20 22:22:46,218 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:46,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 2 times [2022-03-20 22:22:46,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:46,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703722837] [2022-03-20 22:22:46,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:46,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:46,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:46,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546004030] [2022-03-20 22:22:46,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:22:46,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:46,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:46,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:22:46,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 22:22:46,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:22:46,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:46,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 22:22:46,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:46,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:22:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:46,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:46,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703722837] [2022-03-20 22:22:46,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:46,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546004030] [2022-03-20 22:22:46,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546004030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:22:46,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:22:46,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 22:22:46,498 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:46,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1685082185] [2022-03-20 22:22:46,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1685082185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:46,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:46,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 22:22:46,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144729826] [2022-03-20 22:22:46,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:46,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 22:22:46,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:46,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 22:22:46,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 22:22:46,500 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 22:22:46,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:46,549 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-03-20 22:22:46,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 22:22:46,549 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-03-20 22:22:46,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:46,550 INFO L225 Difference]: With dead ends: 39 [2022-03-20 22:22:46,550 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 22:22:46,550 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 22:22:46,551 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:46,551 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 113 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:22:46,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 22:22:46,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-03-20 22:22:46,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 22:22:46,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-03-20 22:22:46,555 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-03-20 22:22:46,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:46,556 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-03-20 22:22:46,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 22:22:46,556 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-03-20 22:22:46,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 22:22:46,556 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:46,556 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:46,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 22:22:46,773 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 [2022-03-20 22:22:46,773 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:46,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:46,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2022-03-20 22:22:46,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:46,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1336365107] [2022-03-20 22:22:46,774 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:46,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 2 times [2022-03-20 22:22:46,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:46,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381824687] [2022-03-20 22:22:46,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:46,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:46,788 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:46,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241032137] [2022-03-20 22:22:46,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:22:46,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:46,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:46,790 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:22:46,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 22:22:46,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:22:46,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:46,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 22:22:46,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:46,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:22:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:47,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:47,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381824687] [2022-03-20 22:22:47,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:47,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241032137] [2022-03-20 22:22:47,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241032137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:22:47,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:22:47,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 22:22:47,006 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:47,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1336365107] [2022-03-20 22:22:47,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1336365107] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:47,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:47,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 22:22:47,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205291138] [2022-03-20 22:22:47,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:47,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 22:22:47,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:47,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 22:22:47,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 22:22:47,007 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 22:22:47,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:47,030 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-03-20 22:22:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 22:22:47,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-03-20 22:22:47,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:47,031 INFO L225 Difference]: With dead ends: 43 [2022-03-20 22:22:47,031 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 22:22:47,031 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 22:22:47,032 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:47,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 72 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:22:47,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 22:22:47,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-20 22:22:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 22:22:47,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-03-20 22:22:47,037 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2022-03-20 22:22:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:47,037 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-03-20 22:22:47,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 22:22:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-03-20 22:22:47,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 22:22:47,038 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:47,038 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:47,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 22:22:47,254 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 [2022-03-20 22:22:47,254 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:47,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:47,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 3 times [2022-03-20 22:22:47,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:47,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [561112771] [2022-03-20 22:22:47,255 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:47,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 4 times [2022-03-20 22:22:47,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:47,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015560693] [2022-03-20 22:22:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:47,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:47,262 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:47,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141916545] [2022-03-20 22:22:47,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:22:47,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:47,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:47,263 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:22:47,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 22:22:47,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:22:47,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:47,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 22:22:47,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:47,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:22:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 22:22:47,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:47,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015560693] [2022-03-20 22:22:47,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:47,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141916545] [2022-03-20 22:22:47,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141916545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:22:47,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:22:47,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 22:22:47,440 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:47,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [561112771] [2022-03-20 22:22:47,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [561112771] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:47,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:47,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 22:22:47,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003396336] [2022-03-20 22:22:47,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:47,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 22:22:47,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:47,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 22:22:47,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 22:22:47,441 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 22:22:47,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:47,468 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-03-20 22:22:47,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 22:22:47,469 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-03-20 22:22:47,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:47,469 INFO L225 Difference]: With dead ends: 52 [2022-03-20 22:22:47,469 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 22:22:47,470 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-20 22:22:47,470 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:47,470 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 86 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:22:47,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 22:22:47,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-20 22:22:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 22:22:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-03-20 22:22:47,476 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2022-03-20 22:22:47,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:47,476 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-03-20 22:22:47,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 22:22:47,476 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-03-20 22:22:47,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 22:22:47,477 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:47,477 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:47,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 22:22:47,693 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 [2022-03-20 22:22:47,694 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:47,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:47,694 INFO L85 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 5 times [2022-03-20 22:22:47,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:47,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1369664753] [2022-03-20 22:22:47,695 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:47,695 INFO L85 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 6 times [2022-03-20 22:22:47,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:47,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167250652] [2022-03-20 22:22:47,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:47,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:47,715 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:47,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689796109] [2022-03-20 22:22:47,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:22:47,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:47,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:47,717 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:22:47,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 22:22:47,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 22:22:47,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:47,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 22:22:47,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:47,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:22:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 22:22:47,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:47,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167250652] [2022-03-20 22:22:47,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:47,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689796109] [2022-03-20 22:22:47,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689796109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:22:47,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:22:47,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 22:22:47,973 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:47,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1369664753] [2022-03-20 22:22:47,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1369664753] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:47,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:47,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 22:22:47,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133076406] [2022-03-20 22:22:47,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:47,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 22:22:47,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:47,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 22:22:47,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 22:22:47,974 INFO L87 Difference]: Start difference. First operand 47 states and 51 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, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 22:22:48,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:48,011 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-03-20 22:22:48,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 22:22:48,012 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, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2022-03-20 22:22:48,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:48,012 INFO L225 Difference]: With dead ends: 61 [2022-03-20 22:22:48,012 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 22:22:48,013 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-20 22:22:48,013 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:48,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 88 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:22:48,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 22:22:48,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-20 22:22:48,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 22:22:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-03-20 22:22:48,020 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2022-03-20 22:22:48,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:48,020 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-03-20 22:22:48,020 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, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 22:22:48,020 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-03-20 22:22:48,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 22:22:48,021 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:48,021 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:48,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 22:22:48,239 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 [2022-03-20 22:22:48,239 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:48,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:48,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 7 times [2022-03-20 22:22:48,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:48,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1027350510] [2022-03-20 22:22:48,240 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:48,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 8 times [2022-03-20 22:22:48,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:48,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784469191] [2022-03-20 22:22:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:48,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:48,260 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:48,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521406439] [2022-03-20 22:22:48,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:22:48,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:48,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:48,261 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:22:48,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 22:22:48,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:22:48,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:48,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 22:22:48,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:48,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:22:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 22:22:48,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:48,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784469191] [2022-03-20 22:22:48,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:48,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521406439] [2022-03-20 22:22:48,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521406439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:22:48,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:22:48,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 22:22:48,569 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:48,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1027350510] [2022-03-20 22:22:48,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1027350510] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:48,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:48,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 22:22:48,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631818057] [2022-03-20 22:22:48,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:48,569 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 22:22:48,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:48,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 22:22:48,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 22:22:48,570 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 22:22:48,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:48,616 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-03-20 22:22:48,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 22:22:48,616 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2022-03-20 22:22:48,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:48,617 INFO L225 Difference]: With dead ends: 70 [2022-03-20 22:22:48,617 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 22:22:48,617 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-20 22:22:48,618 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 25 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:48,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 102 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:22:48,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 22:22:48,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-20 22:22:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 22:22:48,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-03-20 22:22:48,625 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2022-03-20 22:22:48,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:48,625 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-03-20 22:22:48,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 22:22:48,625 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-03-20 22:22:48,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 22:22:48,626 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:48,626 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:48,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 22:22:48,839 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 [2022-03-20 22:22:48,839 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:48,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:48,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 9 times [2022-03-20 22:22:48,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:48,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [315398785] [2022-03-20 22:22:48,840 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:48,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 10 times [2022-03-20 22:22:48,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:48,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585160604] [2022-03-20 22:22:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:48,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:48,849 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:48,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451546965] [2022-03-20 22:22:48,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:22:48,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:48,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:48,868 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) [2022-03-20 22:22:48,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 22:22:48,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:22:48,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:48,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 22:22:48,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:49,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:22:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 22:22:49,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:49,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585160604] [2022-03-20 22:22:49,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:49,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451546965] [2022-03-20 22:22:49,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451546965] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:22:49,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:22:49,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 22:22:49,196 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:49,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [315398785] [2022-03-20 22:22:49,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [315398785] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:49,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:49,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 22:22:49,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205940023] [2022-03-20 22:22:49,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:49,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 22:22:49,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:49,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 22:22:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 22:22:49,198 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 22:22:49,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:49,260 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-03-20 22:22:49,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 22:22:49,260 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2022-03-20 22:22:49,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:49,261 INFO L225 Difference]: With dead ends: 79 [2022-03-20 22:22:49,261 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 22:22:49,262 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-03-20 22:22:49,262 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:49,262 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 122 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:22:49,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 22:22:49,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-20 22:22:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 22:22:49,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2022-03-20 22:22:49,270 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2022-03-20 22:22:49,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:49,270 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2022-03-20 22:22:49,270 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 22:22:49,270 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2022-03-20 22:22:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 22:22:49,271 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:49,271 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:49,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 22:22:49,490 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 [2022-03-20 22:22:49,490 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:49,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:49,491 INFO L85 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 11 times [2022-03-20 22:22:49,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:49,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1131431632] [2022-03-20 22:22:49,491 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:49,491 INFO L85 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 12 times [2022-03-20 22:22:49,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:49,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226969947] [2022-03-20 22:22:49,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:49,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:49,499 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:49,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54260298] [2022-03-20 22:22:49,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:22:49,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:49,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:49,500 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) [2022-03-20 22:22:49,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 22:22:49,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 22:22:49,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:49,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 22:22:49,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:49,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:22:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 22:22:49,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:49,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226969947] [2022-03-20 22:22:49,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:49,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54260298] [2022-03-20 22:22:49,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54260298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:22:49,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:22:49,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 22:22:49,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:49,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1131431632] [2022-03-20 22:22:49,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1131431632] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:49,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:49,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 22:22:49,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949332552] [2022-03-20 22:22:49,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:49,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 22:22:49,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:49,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 22:22:49,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 22:22:49,904 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 22:22:49,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:49,977 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-03-20 22:22:49,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 22:22:49,977 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2022-03-20 22:22:49,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:49,978 INFO L225 Difference]: With dead ends: 88 [2022-03-20 22:22:49,978 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 22:22:49,978 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-03-20 22:22:49,979 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:49,979 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 124 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:22:49,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 22:22:49,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-20 22:22:49,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 22:22:49,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-03-20 22:22:49,987 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2022-03-20 22:22:49,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:49,987 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-03-20 22:22:49,987 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 22:22:49,987 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-03-20 22:22:49,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 22:22:49,988 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:49,988 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:50,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-20 22:22:50,203 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 [2022-03-20 22:22:50,204 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:50,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:50,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 13 times [2022-03-20 22:22:50,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:50,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [135965285] [2022-03-20 22:22:50,204 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:50,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 14 times [2022-03-20 22:22:50,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:50,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437392010] [2022-03-20 22:22:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:50,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:50,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:50,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [149995776] [2022-03-20 22:22:50,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:22:50,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:50,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:50,213 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) [2022-03-20 22:22:50,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 22:22:50,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:22:50,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:50,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 22:22:50,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:50,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:22:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 22:22:50,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:50,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437392010] [2022-03-20 22:22:50,592 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:50,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149995776] [2022-03-20 22:22:50,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149995776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:22:50,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:22:50,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 22:22:50,592 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:50,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [135965285] [2022-03-20 22:22:50,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [135965285] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:50,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:50,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 22:22:50,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063596092] [2022-03-20 22:22:50,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:50,593 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 22:22:50,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:50,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 22:22:50,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 22:22:50,594 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 22:22:50,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:50,675 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-03-20 22:22:50,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 22:22:50,676 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2022-03-20 22:22:50,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:50,676 INFO L225 Difference]: With dead ends: 97 [2022-03-20 22:22:50,677 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 22:22:50,677 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2022-03-20 22:22:50,677 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 30 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:50,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 132 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:22:50,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 22:22:50,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-03-20 22:22:50,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 22:22:50,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2022-03-20 22:22:50,685 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2022-03-20 22:22:50,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:50,685 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2022-03-20 22:22:50,685 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 22:22:50,685 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2022-03-20 22:22:50,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 22:22:50,686 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:50,686 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:50,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 22:22:50,903 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 [2022-03-20 22:22:50,903 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:50,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:50,903 INFO L85 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 15 times [2022-03-20 22:22:50,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:50,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [419924576] [2022-03-20 22:22:50,904 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:50,904 INFO L85 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 16 times [2022-03-20 22:22:50,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:50,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63604311] [2022-03-20 22:22:50,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:50,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:50,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:50,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233190594] [2022-03-20 22:22:50,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:22:50,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:50,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:50,932 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) [2022-03-20 22:22:50,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 22:22:50,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:22:50,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:50,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 22:22:50,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:51,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:22:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 22:22:51,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:51,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63604311] [2022-03-20 22:22:51,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:51,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233190594] [2022-03-20 22:22:51,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233190594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:22:51,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:22:51,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 22:22:51,364 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:51,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [419924576] [2022-03-20 22:22:51,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [419924576] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:51,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:51,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 22:22:51,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965015253] [2022-03-20 22:22:51,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:51,384 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 22:22:51,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:51,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 22:22:51,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-20 22:22:51,385 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 22:22:51,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:51,477 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2022-03-20 22:22:51,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 22:22:51,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2022-03-20 22:22:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:51,478 INFO L225 Difference]: With dead ends: 106 [2022-03-20 22:22:51,478 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 22:22:51,479 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=507, Unknown=0, NotChecked=0, Total=870 [2022-03-20 22:22:51,479 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 27 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:51,480 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 146 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:22:51,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 22:22:51,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-20 22:22:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 22:22:51,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-03-20 22:22:51,489 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2022-03-20 22:22:51,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:51,489 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-03-20 22:22:51,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 22:22:51,489 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-03-20 22:22:51,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 22:22:51,490 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:51,490 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:51,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 22:22:51,707 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 [2022-03-20 22:22:51,708 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:51,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:51,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 17 times [2022-03-20 22:22:51,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:51,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [206536320] [2022-03-20 22:22:51,709 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:51,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 18 times [2022-03-20 22:22:51,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:51,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422355985] [2022-03-20 22:22:51,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:51,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:51,716 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:51,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444220871] [2022-03-20 22:22:51,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:22:51,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:51,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:51,718 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) [2022-03-20 22:22:51,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 22:22:51,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 22:22:51,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:51,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 22:22:51,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:51,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:22:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 198 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-20 22:22:52,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:52,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422355985] [2022-03-20 22:22:52,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:52,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444220871] [2022-03-20 22:22:52,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444220871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:22:52,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:22:52,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 22:22:52,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:52,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [206536320] [2022-03-20 22:22:52,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [206536320] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:52,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:52,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 22:22:52,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780472666] [2022-03-20 22:22:52,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:52,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 22:22:52,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:52,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 22:22:52,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 22:22:52,232 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 22:22:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:52,338 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2022-03-20 22:22:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 22:22:52,339 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2022-03-20 22:22:52,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:52,340 INFO L225 Difference]: With dead ends: 115 [2022-03-20 22:22:52,340 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 22:22:52,340 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 22:22:52,341 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 37 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:52,341 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 148 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:22:52,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 22:22:52,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-20 22:22:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 22:22:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-03-20 22:22:52,348 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2022-03-20 22:22:52,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:52,348 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-03-20 22:22:52,348 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 22:22:52,348 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-03-20 22:22:52,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 22:22:52,349 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:52,349 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:52,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 22:22:52,563 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 [2022-03-20 22:22:52,563 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:52,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:52,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 19 times [2022-03-20 22:22:52,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:52,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [406020223] [2022-03-20 22:22:52,564 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:52,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 20 times [2022-03-20 22:22:52,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:52,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206641006] [2022-03-20 22:22:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:52,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:52,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:52,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776476080] [2022-03-20 22:22:52,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:22:52,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:52,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:52,572 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) [2022-03-20 22:22:52,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 22:22:52,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:22:52,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:52,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 22:22:52,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:52,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:22:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 22:22:53,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:53,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206641006] [2022-03-20 22:22:53,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:53,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776476080] [2022-03-20 22:22:53,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776476080] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:22:53,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:22:53,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 22:22:53,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:53,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [406020223] [2022-03-20 22:22:53,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [406020223] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:53,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:53,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 22:22:53,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270513636] [2022-03-20 22:22:53,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:53,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 22:22:53,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:53,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 22:22:53,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 22:22:53,159 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 22:22:53,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:53,282 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2022-03-20 22:22:53,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 22:22:53,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 113 [2022-03-20 22:22:53,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:53,283 INFO L225 Difference]: With dead ends: 124 [2022-03-20 22:22:53,283 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 22:22:53,283 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=531, Invalid=729, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 22:22:53,284 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 29 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:53,284 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 156 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:22:53,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 22:22:53,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-03-20 22:22:53,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 22:22:53,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2022-03-20 22:22:53,291 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 113 [2022-03-20 22:22:53,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:53,291 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2022-03-20 22:22:53,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 22:22:53,292 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2022-03-20 22:22:53,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 22:22:53,292 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:53,292 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:53,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 22:22:53,509 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 [2022-03-20 22:22:53,509 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:53,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:53,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1999651676, now seen corresponding path program 21 times [2022-03-20 22:22:53,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:53,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1476984741] [2022-03-20 22:22:53,510 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:53,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1999651676, now seen corresponding path program 22 times [2022-03-20 22:22:53,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:53,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084005609] [2022-03-20 22:22:53,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:53,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:53,518 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:53,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649873005] [2022-03-20 22:22:53,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:22:53,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:53,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:53,519 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) [2022-03-20 22:22:53,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 22:22:53,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:22:53,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:53,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 22:22:53,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 517 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:53,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:22:54,140 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 297 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 22:22:54,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:54,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084005609] [2022-03-20 22:22:54,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:54,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649873005] [2022-03-20 22:22:54,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649873005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:22:54,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:22:54,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-20 22:22:54,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:54,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1476984741] [2022-03-20 22:22:54,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1476984741] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:54,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:54,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 22:22:54,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948890799] [2022-03-20 22:22:54,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:54,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 22:22:54,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:54,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 22:22:54,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-20 22:22:54,142 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 22:22:54,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:54,265 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2022-03-20 22:22:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 22:22:54,265 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 122 [2022-03-20 22:22:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:54,266 INFO L225 Difference]: With dead ends: 133 [2022-03-20 22:22:54,266 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 22:22:54,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=627, Invalid=855, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 22:22:54,267 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 41 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:54,267 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 158 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:22:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 22:22:54,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-03-20 22:22:54,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 22:22:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2022-03-20 22:22:54,274 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 122 [2022-03-20 22:22:54,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:54,274 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2022-03-20 22:22:54,275 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 22:22:54,275 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2022-03-20 22:22:54,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 22:22:54,275 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:54,275 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:54,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 22:22:54,491 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 [2022-03-20 22:22:54,492 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:54,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:54,492 INFO L85 PathProgramCache]: Analyzing trace with hash 881443734, now seen corresponding path program 23 times [2022-03-20 22:22:54,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:54,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [611206163] [2022-03-20 22:22:54,493 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:54,493 INFO L85 PathProgramCache]: Analyzing trace with hash 881443734, now seen corresponding path program 24 times [2022-03-20 22:22:54,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:54,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002866678] [2022-03-20 22:22:54,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:54,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:54,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:54,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669680575] [2022-03-20 22:22:54,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:22:54,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:54,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:54,501 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) [2022-03-20 22:22:54,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 22:22:54,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 22:22:54,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:54,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 22:22:54,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 618 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:54,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:22:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 354 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 22:22:55,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:55,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002866678] [2022-03-20 22:22:55,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:55,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669680575] [2022-03-20 22:22:55,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669680575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:22:55,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:22:55,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-20 22:22:55,213 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:55,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [611206163] [2022-03-20 22:22:55,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [611206163] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:55,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:55,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 22:22:55,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337216471] [2022-03-20 22:22:55,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:55,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 22:22:55,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:55,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 22:22:55,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-20 22:22:55,214 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 22:22:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:55,357 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2022-03-20 22:22:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 22:22:55,358 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 131 [2022-03-20 22:22:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:55,358 INFO L225 Difference]: With dead ends: 142 [2022-03-20 22:22:55,358 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 22:22:55,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=731, Invalid=991, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 22:22:55,359 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 58 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:55,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 172 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:22:55,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 22:22:55,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-20 22:22:55,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 22:22:55,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2022-03-20 22:22:55,367 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 131 [2022-03-20 22:22:55,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:55,367 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2022-03-20 22:22:55,368 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 22:22:55,368 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2022-03-20 22:22:55,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-20 22:22:55,368 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:55,368 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:55,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-20 22:22:55,585 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 [2022-03-20 22:22:55,585 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:55,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:55,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2089018524, now seen corresponding path program 25 times [2022-03-20 22:22:55,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:55,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1521570183] [2022-03-20 22:22:55,586 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:55,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2089018524, now seen corresponding path program 26 times [2022-03-20 22:22:55,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:55,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674417441] [2022-03-20 22:22:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:55,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:55,592 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:55,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442384771] [2022-03-20 22:22:55,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:22:55,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:55,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:55,602 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) [2022-03-20 22:22:55,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 22:22:55,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:22:55,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:55,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 22:22:55,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 728 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:55,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:22:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 416 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 22:22:56,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:56,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674417441] [2022-03-20 22:22:56,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:56,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442384771] [2022-03-20 22:22:56,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442384771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:22:56,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:22:56,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-20 22:22:56,300 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:56,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1521570183] [2022-03-20 22:22:56,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1521570183] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:56,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:56,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 22:22:56,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174778885] [2022-03-20 22:22:56,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:56,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 22:22:56,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:56,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 22:22:56,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-20 22:22:56,302 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 22:22:56,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:56,477 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2022-03-20 22:22:56,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 22:22:56,477 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 140 [2022-03-20 22:22:56,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:56,479 INFO L225 Difference]: With dead ends: 151 [2022-03-20 22:22:56,479 INFO L226 Difference]: Without dead ends: 146 [2022-03-20 22:22:56,481 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=843, Invalid=1137, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 22:22:56,482 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 48 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:56,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 174 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:22:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-20 22:22:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-03-20 22:22:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 110 states have internal predecessors, (125), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 22:22:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2022-03-20 22:22:56,504 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 140 [2022-03-20 22:22:56,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:56,505 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2022-03-20 22:22:56,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 22:22:56,505 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2022-03-20 22:22:56,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 22:22:56,523 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:56,523 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:56,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 22:22:56,724 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 [2022-03-20 22:22:56,724 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:56,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:56,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1088976298, now seen corresponding path program 27 times [2022-03-20 22:22:56,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:56,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2060392167] [2022-03-20 22:22:56,725 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1088976298, now seen corresponding path program 28 times [2022-03-20 22:22:56,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:56,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056352704] [2022-03-20 22:22:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:56,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:56,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:56,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469919510] [2022-03-20 22:22:56,731 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:22:56,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:56,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:56,743 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) [2022-03-20 22:22:56,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 22:22:56,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:22:56,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:56,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 22:22:56,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:57,105 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 847 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:57,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:22:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 483 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-20 22:22:57,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:57,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056352704] [2022-03-20 22:22:57,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:57,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469919510] [2022-03-20 22:22:57,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469919510] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:22:57,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:22:57,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-20 22:22:57,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:57,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2060392167] [2022-03-20 22:22:57,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2060392167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:57,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:57,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 22:22:57,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359912011] [2022-03-20 22:22:57,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:57,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 22:22:57,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:57,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 22:22:57,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 22:22:57,564 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 22:22:57,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:57,747 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-03-20 22:22:57,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 22:22:57,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 149 [2022-03-20 22:22:57,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:57,748 INFO L225 Difference]: With dead ends: 160 [2022-03-20 22:22:57,748 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 22:22:57,749 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=963, Invalid=1293, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 22:22:57,749 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 58 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:57,750 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 194 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:22:57,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 22:22:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-03-20 22:22:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 22:22:57,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2022-03-20 22:22:57,757 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 149 [2022-03-20 22:22:57,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:57,758 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2022-03-20 22:22:57,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 22:22:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2022-03-20 22:22:57,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-20 22:22:57,759 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:57,759 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:57,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 22:22:57,959 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 [2022-03-20 22:22:57,959 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:57,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:57,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2060864036, now seen corresponding path program 29 times [2022-03-20 22:22:57,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:57,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [454764364] [2022-03-20 22:22:57,960 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:57,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2060864036, now seen corresponding path program 30 times [2022-03-20 22:22:57,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:57,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941122704] [2022-03-20 22:22:57,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:57,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:57,967 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:57,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568558409] [2022-03-20 22:22:57,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:22:57,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:57,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:57,968 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) [2022-03-20 22:22:57,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 22:22:58,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-20 22:22:58,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:58,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 22:22:58,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:58,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:22:58,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 555 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-20 22:22:58,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:58,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941122704] [2022-03-20 22:22:58,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:58,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568558409] [2022-03-20 22:22:58,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568558409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:22:58,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:22:58,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-20 22:22:58,739 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:58,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [454764364] [2022-03-20 22:22:58,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [454764364] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:58,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:58,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 22:22:58,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630739518] [2022-03-20 22:22:58,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:58,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 22:22:58,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:58,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 22:22:58,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 22:22:58,741 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 22:22:58,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:22:58,924 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2022-03-20 22:22:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 22:22:58,924 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 158 [2022-03-20 22:22:58,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:22:58,926 INFO L225 Difference]: With dead ends: 169 [2022-03-20 22:22:58,926 INFO L226 Difference]: Without dead ends: 164 [2022-03-20 22:22:58,927 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1091, Invalid=1459, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 22:22:58,927 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 48 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:22:58,927 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 208 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:22:58,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-20 22:22:58,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-03-20 22:22:58,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 22:22:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 181 transitions. [2022-03-20 22:22:58,941 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 181 transitions. Word has length 158 [2022-03-20 22:22:58,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:22:58,941 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 181 transitions. [2022-03-20 22:22:58,941 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 22:22:58,941 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 181 transitions. [2022-03-20 22:22:58,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 22:22:58,942 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:22:58,942 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:22:58,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 22:22:59,142 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 [2022-03-20 22:22:59,142 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:22:59,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:22:59,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1479991018, now seen corresponding path program 31 times [2022-03-20 22:22:59,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:59,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [675269493] [2022-03-20 22:22:59,143 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:22:59,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1479991018, now seen corresponding path program 32 times [2022-03-20 22:22:59,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:22:59,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594712100] [2022-03-20 22:22:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:22:59,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:22:59,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:22:59,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650895831] [2022-03-20 22:22:59,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:22:59,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:22:59,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:22:59,155 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) [2022-03-20 22:22:59,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 22:22:59,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:22:59,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:22:59,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 22:22:59,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:22:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 1112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:22:59,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:22:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 632 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 22:22:59,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:22:59,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594712100] [2022-03-20 22:22:59,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:22:59,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650895831] [2022-03-20 22:22:59,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650895831] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:22:59,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:22:59,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-20 22:22:59,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:22:59,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [675269493] [2022-03-20 22:22:59,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [675269493] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:22:59,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:22:59,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 22:22:59,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195505105] [2022-03-20 22:22:59,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:22:59,909 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 22:22:59,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:22:59,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 22:22:59,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 22:22:59,910 INFO L87 Difference]: Start difference. First operand 164 states and 181 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 22:23:00,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:00,051 INFO L93 Difference]: Finished difference Result 178 states and 196 transitions. [2022-03-20 22:23:00,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 22:23:00,051 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 167 [2022-03-20 22:23:00,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:00,052 INFO L225 Difference]: With dead ends: 178 [2022-03-20 22:23:00,052 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 22:23:00,053 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1227, Invalid=1635, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 22:23:00,053 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:00,053 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 228 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 22:23:00,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 22:23:00,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-20 22:23:00,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 22:23:00,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2022-03-20 22:23:00,063 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 167 [2022-03-20 22:23:00,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:00,063 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2022-03-20 22:23:00,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 22:23:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2022-03-20 22:23:00,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-20 22:23:00,065 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:00,065 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:00,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:00,279 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 [2022-03-20 22:23:00,279 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:00,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:00,280 INFO L85 PathProgramCache]: Analyzing trace with hash 318093084, now seen corresponding path program 33 times [2022-03-20 22:23:00,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:00,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1384963365] [2022-03-20 22:23:00,280 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:00,280 INFO L85 PathProgramCache]: Analyzing trace with hash 318093084, now seen corresponding path program 34 times [2022-03-20 22:23:00,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:00,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136599872] [2022-03-20 22:23:00,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:00,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:00,287 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:00,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446707236] [2022-03-20 22:23:00,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:23:00,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:00,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:00,288 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) [2022-03-20 22:23:00,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 22:23:00,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:23:00,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:00,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 22:23:00,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 1258 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:00,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 714 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-20 22:23:01,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:01,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136599872] [2022-03-20 22:23:01,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:01,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446707236] [2022-03-20 22:23:01,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446707236] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:01,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:01,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-20 22:23:01,016 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:01,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1384963365] [2022-03-20 22:23:01,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1384963365] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:01,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:01,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 22:23:01,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569081456] [2022-03-20 22:23:01,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:01,017 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 22:23:01,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:01,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 22:23:01,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 22:23:01,018 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 22:23:01,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:01,231 INFO L93 Difference]: Finished difference Result 187 states and 206 transitions. [2022-03-20 22:23:01,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 22:23:01,231 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 176 [2022-03-20 22:23:01,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:01,235 INFO L225 Difference]: With dead ends: 187 [2022-03-20 22:23:01,235 INFO L226 Difference]: Without dead ends: 182 [2022-03-20 22:23:01,238 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1371, Invalid=1821, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 22:23:01,239 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 51 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:01,239 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 224 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:01,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-20 22:23:01,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-03-20 22:23:01,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 22:23:01,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2022-03-20 22:23:01,269 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 176 [2022-03-20 22:23:01,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:01,269 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2022-03-20 22:23:01,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 22:23:01,269 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2022-03-20 22:23:01,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-20 22:23:01,270 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:01,270 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:01,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:01,485 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 [2022-03-20 22:23:01,485 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:01,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:01,486 INFO L85 PathProgramCache]: Analyzing trace with hash 994740182, now seen corresponding path program 35 times [2022-03-20 22:23:01,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:01,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [494721648] [2022-03-20 22:23:01,486 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:01,486 INFO L85 PathProgramCache]: Analyzing trace with hash 994740182, now seen corresponding path program 36 times [2022-03-20 22:23:01,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:01,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696870837] [2022-03-20 22:23:01,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:01,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:01,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:01,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676729474] [2022-03-20 22:23:01,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:23:01,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:01,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:01,495 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) [2022-03-20 22:23:01,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 22:23:01,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 22:23:01,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:01,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 22:23:01,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 1413 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:01,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:02,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 801 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-20 22:23:02,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:02,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696870837] [2022-03-20 22:23:02,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:02,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676729474] [2022-03-20 22:23:02,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676729474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:02,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:02,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-20 22:23:02,513 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:02,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [494721648] [2022-03-20 22:23:02,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [494721648] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:02,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:02,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 22:23:02,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521086840] [2022-03-20 22:23:02,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:02,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 22:23:02,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:02,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 22:23:02,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 22:23:02,515 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 22:23:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:02,758 INFO L93 Difference]: Finished difference Result 196 states and 216 transitions. [2022-03-20 22:23:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 22:23:02,758 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 185 [2022-03-20 22:23:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:02,759 INFO L225 Difference]: With dead ends: 196 [2022-03-20 22:23:02,759 INFO L226 Difference]: Without dead ends: 191 [2022-03-20 22:23:02,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1523, Invalid=2017, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 22:23:02,761 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 64 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:02,761 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 220 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:02,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-20 22:23:02,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-03-20 22:23:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 states have internal predecessors, (165), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 22:23:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2022-03-20 22:23:02,792 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 185 [2022-03-20 22:23:02,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:02,792 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2022-03-20 22:23:02,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 22:23:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2022-03-20 22:23:02,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-03-20 22:23:02,793 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:02,793 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:02,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:03,010 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 [2022-03-20 22:23:03,011 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:03,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1522264156, now seen corresponding path program 37 times [2022-03-20 22:23:03,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:03,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [70105871] [2022-03-20 22:23:03,011 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:03,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1522264156, now seen corresponding path program 38 times [2022-03-20 22:23:03,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:03,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068665345] [2022-03-20 22:23:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:03,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:03,018 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:03,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448415443] [2022-03-20 22:23:03,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:23:03,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:03,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:03,019 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) [2022-03-20 22:23:03,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 22:23:03,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:23:03,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:03,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 22:23:03,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 1577 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:03,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 893 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-20 22:23:04,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:04,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068665345] [2022-03-20 22:23:04,155 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:04,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448415443] [2022-03-20 22:23:04,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448415443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:04,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:04,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-20 22:23:04,155 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:04,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [70105871] [2022-03-20 22:23:04,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [70105871] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:04,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:04,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 22:23:04,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551671761] [2022-03-20 22:23:04,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:04,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 22:23:04,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:04,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 22:23:04,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 22:23:04,157 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 22:23:04,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:04,413 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2022-03-20 22:23:04,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 22:23:04,413 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 194 [2022-03-20 22:23:04,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:04,414 INFO L225 Difference]: With dead ends: 205 [2022-03-20 22:23:04,414 INFO L226 Difference]: Without dead ends: 200 [2022-03-20 22:23:04,415 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2223, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 22:23:04,416 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 66 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:04,416 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 234 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:04,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-20 22:23:04,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-03-20 22:23:04,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.138157894736842) internal successors, (173), 152 states have internal predecessors, (173), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 22:23:04,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2022-03-20 22:23:04,425 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 194 [2022-03-20 22:23:04,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:04,426 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2022-03-20 22:23:04,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 22:23:04,426 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2022-03-20 22:23:04,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-20 22:23:04,427 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:04,427 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:04,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:04,643 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 [2022-03-20 22:23:04,644 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:04,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:04,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1934081686, now seen corresponding path program 39 times [2022-03-20 22:23:04,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:04,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [851468696] [2022-03-20 22:23:04,644 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:04,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1934081686, now seen corresponding path program 40 times [2022-03-20 22:23:04,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:04,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514647137] [2022-03-20 22:23:04,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:04,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:04,663 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:04,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [952804579] [2022-03-20 22:23:04,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:23:04,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:04,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:04,667 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) [2022-03-20 22:23:04,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 22:23:04,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:23:04,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:04,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 22:23:04,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 40 proven. 1750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:05,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 40 proven. 990 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-03-20 22:23:05,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:05,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514647137] [2022-03-20 22:23:05,479 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:05,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952804579] [2022-03-20 22:23:05,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952804579] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:05,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:05,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-20 22:23:05,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:05,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [851468696] [2022-03-20 22:23:05,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [851468696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:05,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:05,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 22:23:05,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47012931] [2022-03-20 22:23:05,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:05,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 22:23:05,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:05,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 22:23:05,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 22:23:05,481 INFO L87 Difference]: Start difference. First operand 200 states and 221 transitions. Second operand has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 22:23:05,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:05,704 INFO L93 Difference]: Finished difference Result 214 states and 236 transitions. [2022-03-20 22:23:05,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 22:23:05,704 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) Word has length 203 [2022-03-20 22:23:05,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:05,705 INFO L225 Difference]: With dead ends: 214 [2022-03-20 22:23:05,705 INFO L226 Difference]: Without dead ends: 209 [2022-03-20 22:23:05,706 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1851, Invalid=2439, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 22:23:05,707 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 92 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:05,707 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 224 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-20 22:23:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-03-20 22:23:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 159 states have (on average 1.1383647798742138) internal successors, (181), 159 states have internal predecessors, (181), 26 states have call successors, (26), 25 states have call predecessors, (26), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 22:23:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 231 transitions. [2022-03-20 22:23:05,717 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 231 transitions. Word has length 203 [2022-03-20 22:23:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:05,717 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 231 transitions. [2022-03-20 22:23:05,717 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 22:23:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 231 transitions. [2022-03-20 22:23:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-20 22:23:05,718 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:05,718 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:05,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:05,919 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 [2022-03-20 22:23:05,919 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:05,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:05,919 INFO L85 PathProgramCache]: Analyzing trace with hash -2075113060, now seen corresponding path program 41 times [2022-03-20 22:23:05,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:05,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1665108713] [2022-03-20 22:23:05,920 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:05,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2075113060, now seen corresponding path program 42 times [2022-03-20 22:23:05,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:05,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745495060] [2022-03-20 22:23:05,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:05,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:05,945 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:05,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389554402] [2022-03-20 22:23:05,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:23:05,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:05,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:05,959 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) [2022-03-20 22:23:05,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 22:23:06,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-20 22:23:06,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:06,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 22:23:06,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 42 proven. 1932 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:06,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 42 proven. 1092 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-20 22:23:07,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:07,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745495060] [2022-03-20 22:23:07,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:07,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389554402] [2022-03-20 22:23:07,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389554402] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:07,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:07,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-20 22:23:07,348 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:07,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1665108713] [2022-03-20 22:23:07,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1665108713] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:07,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:07,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 22:23:07,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288948769] [2022-03-20 22:23:07,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:07,348 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 22:23:07,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:07,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 22:23:07,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 22:23:07,349 INFO L87 Difference]: Start difference. First operand 209 states and 231 transitions. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 22:23:07,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:07,678 INFO L93 Difference]: Finished difference Result 223 states and 246 transitions. [2022-03-20 22:23:07,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 22:23:07,678 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 212 [2022-03-20 22:23:07,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:07,679 INFO L225 Difference]: With dead ends: 223 [2022-03-20 22:23:07,679 INFO L226 Difference]: Without dead ends: 218 [2022-03-20 22:23:07,680 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2027, Invalid=2665, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 22:23:07,681 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 122 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:07,681 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 238 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:07,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-20 22:23:07,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-03-20 22:23:07,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 22:23:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 241 transitions. [2022-03-20 22:23:07,697 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 241 transitions. Word has length 212 [2022-03-20 22:23:07,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:07,698 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 241 transitions. [2022-03-20 22:23:07,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 22:23:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 241 transitions. [2022-03-20 22:23:07,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-03-20 22:23:07,699 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:07,699 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:07,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-20 22:23:07,912 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 [2022-03-20 22:23:07,912 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:07,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:07,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1234385578, now seen corresponding path program 43 times [2022-03-20 22:23:07,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:07,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1107508032] [2022-03-20 22:23:07,913 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:07,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1234385578, now seen corresponding path program 44 times [2022-03-20 22:23:07,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:07,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077667537] [2022-03-20 22:23:07,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:07,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:07,920 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:07,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274831966] [2022-03-20 22:23:07,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:23:07,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:07,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:07,924 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) [2022-03-20 22:23:07,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 22:23:08,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:23:08,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:08,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 22:23:08,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:08,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-03-20 22:23:09,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:09,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077667537] [2022-03-20 22:23:09,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:09,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274831966] [2022-03-20 22:23:09,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274831966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:09,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:09,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-20 22:23:09,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:09,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1107508032] [2022-03-20 22:23:09,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1107508032] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:09,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:09,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 22:23:09,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757232773] [2022-03-20 22:23:09,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:09,280 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 22:23:09,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:09,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 22:23:09,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 22:23:09,281 INFO L87 Difference]: Start difference. First operand 218 states and 241 transitions. Second operand has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-20 22:23:09,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:09,594 INFO L93 Difference]: Finished difference Result 232 states and 256 transitions. [2022-03-20 22:23:09,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 22:23:09,595 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) Word has length 221 [2022-03-20 22:23:09,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:09,596 INFO L225 Difference]: With dead ends: 232 [2022-03-20 22:23:09,596 INFO L226 Difference]: Without dead ends: 227 [2022-03-20 22:23:09,597 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2901, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 22:23:09,597 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 68 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:09,597 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 264 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:09,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-20 22:23:09,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-03-20 22:23:09,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 173 states have (on average 1.138728323699422) internal successors, (197), 173 states have internal predecessors, (197), 28 states have call successors, (28), 27 states have call predecessors, (28), 25 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 22:23:09,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 251 transitions. [2022-03-20 22:23:09,608 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 251 transitions. Word has length 221 [2022-03-20 22:23:09,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:09,609 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 251 transitions. [2022-03-20 22:23:09,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-20 22:23:09,609 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 251 transitions. [2022-03-20 22:23:09,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-03-20 22:23:09,610 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:09,610 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:09,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:09,823 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 [2022-03-20 22:23:09,823 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:09,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:09,824 INFO L85 PathProgramCache]: Analyzing trace with hash -360260900, now seen corresponding path program 45 times [2022-03-20 22:23:09,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:09,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1450098042] [2022-03-20 22:23:09,824 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:09,824 INFO L85 PathProgramCache]: Analyzing trace with hash -360260900, now seen corresponding path program 46 times [2022-03-20 22:23:09,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:09,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226480383] [2022-03-20 22:23:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:09,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:09,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:09,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157491792] [2022-03-20 22:23:09,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:23:09,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:09,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:09,832 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) [2022-03-20 22:23:09,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 22:23:09,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:23:09,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:09,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 22:23:09,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 46 proven. 2323 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:10,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 46 proven. 1311 refuted. 0 times theorem prover too weak. 1016 trivial. 0 not checked. [2022-03-20 22:23:11,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:11,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226480383] [2022-03-20 22:23:11,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:11,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157491792] [2022-03-20 22:23:11,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157491792] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:11,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:11,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-03-20 22:23:11,233 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:11,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1450098042] [2022-03-20 22:23:11,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1450098042] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:11,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:11,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 22:23:11,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111749185] [2022-03-20 22:23:11,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:11,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 22:23:11,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:11,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 22:23:11,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 22:23:11,235 INFO L87 Difference]: Start difference. First operand 227 states and 251 transitions. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-20 22:23:11,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:11,577 INFO L93 Difference]: Finished difference Result 241 states and 266 transitions. [2022-03-20 22:23:11,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 22:23:11,577 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) Word has length 230 [2022-03-20 22:23:11,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:11,584 INFO L225 Difference]: With dead ends: 241 [2022-03-20 22:23:11,584 INFO L226 Difference]: Without dead ends: 236 [2022-03-20 22:23:11,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2403, Invalid=3147, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 22:23:11,603 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 73 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:11,603 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 284 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:11,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-20 22:23:11,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-03-20 22:23:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 180 states have (on average 1.1388888888888888) internal successors, (205), 180 states have internal predecessors, (205), 29 states have call successors, (29), 28 states have call predecessors, (29), 26 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 22:23:11,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 261 transitions. [2022-03-20 22:23:11,615 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 261 transitions. Word has length 230 [2022-03-20 22:23:11,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:11,615 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 261 transitions. [2022-03-20 22:23:11,616 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-20 22:23:11,616 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 261 transitions. [2022-03-20 22:23:11,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-20 22:23:11,616 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:11,617 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:11,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:11,817 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 [2022-03-20 22:23:11,817 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:11,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1738171370, now seen corresponding path program 47 times [2022-03-20 22:23:11,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:11,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [762880090] [2022-03-20 22:23:11,818 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:11,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1738171370, now seen corresponding path program 48 times [2022-03-20 22:23:11,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:11,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923113140] [2022-03-20 22:23:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:11,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:11,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:11,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376955748] [2022-03-20 22:23:11,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:23:11,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:11,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:11,827 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) [2022-03-20 22:23:11,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 22:23:11,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-20 22:23:11,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:11,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 22:23:11,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 48 proven. 2532 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:12,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 48 proven. 1428 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2022-03-20 22:23:13,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:13,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923113140] [2022-03-20 22:23:13,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:13,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376955748] [2022-03-20 22:23:13,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376955748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:13,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:13,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-03-20 22:23:13,328 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:13,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [762880090] [2022-03-20 22:23:13,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [762880090] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:13,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:13,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 22:23:13,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782178510] [2022-03-20 22:23:13,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:13,329 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 22:23:13,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:13,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 22:23:13,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 22:23:13,330 INFO L87 Difference]: Start difference. First operand 236 states and 261 transitions. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-20 22:23:13,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:13,685 INFO L93 Difference]: Finished difference Result 250 states and 276 transitions. [2022-03-20 22:23:13,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 22:23:13,686 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) Word has length 239 [2022-03-20 22:23:13,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:13,687 INFO L225 Difference]: With dead ends: 250 [2022-03-20 22:23:13,687 INFO L226 Difference]: Without dead ends: 245 [2022-03-20 22:23:13,687 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2603, Invalid=3403, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 22:23:13,688 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 68 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:13,688 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 280 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:13,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-20 22:23:13,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-03-20 22:23:13,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 187 states have (on average 1.13903743315508) internal successors, (213), 187 states have internal predecessors, (213), 30 states have call successors, (30), 29 states have call predecessors, (30), 27 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 22:23:13,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 271 transitions. [2022-03-20 22:23:13,700 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 271 transitions. Word has length 239 [2022-03-20 22:23:13,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:13,700 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 271 transitions. [2022-03-20 22:23:13,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-20 22:23:13,700 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 271 transitions. [2022-03-20 22:23:13,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-03-20 22:23:13,702 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:13,706 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:13,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:13,922 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 [2022-03-20 22:23:13,923 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:13,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:13,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1530108956, now seen corresponding path program 49 times [2022-03-20 22:23:13,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:13,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1616655549] [2022-03-20 22:23:13,923 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:13,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1530108956, now seen corresponding path program 50 times [2022-03-20 22:23:13,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:13,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871245095] [2022-03-20 22:23:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:13,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:13,937 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:13,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16101921] [2022-03-20 22:23:13,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:23:13,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:13,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:13,950 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) [2022-03-20 22:23:13,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 22:23:14,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:23:14,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:14,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 22:23:14,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 50 proven. 2750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:14,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 50 proven. 1550 refuted. 0 times theorem prover too weak. 1204 trivial. 0 not checked. [2022-03-20 22:23:15,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:15,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871245095] [2022-03-20 22:23:15,553 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:15,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16101921] [2022-03-20 22:23:15,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16101921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:15,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:15,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2022-03-20 22:23:15,554 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:15,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1616655549] [2022-03-20 22:23:15,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1616655549] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:15,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:15,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 22:23:15,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764445252] [2022-03-20 22:23:15,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:15,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 22:23:15,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:15,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 22:23:15,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 22:23:15,555 INFO L87 Difference]: Start difference. First operand 245 states and 271 transitions. Second operand has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-20 22:23:15,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:15,896 INFO L93 Difference]: Finished difference Result 259 states and 286 transitions. [2022-03-20 22:23:15,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 22:23:15,896 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) Word has length 248 [2022-03-20 22:23:15,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:15,898 INFO L225 Difference]: With dead ends: 259 [2022-03-20 22:23:15,898 INFO L226 Difference]: Without dead ends: 254 [2022-03-20 22:23:15,899 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2811, Invalid=3669, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 22:23:15,899 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 109 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:15,899 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 288 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:15,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-20 22:23:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-03-20 22:23:15,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.1391752577319587) internal successors, (221), 194 states have internal predecessors, (221), 31 states have call successors, (31), 30 states have call predecessors, (31), 28 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 22:23:15,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 281 transitions. [2022-03-20 22:23:15,911 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 281 transitions. Word has length 248 [2022-03-20 22:23:15,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:15,912 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 281 transitions. [2022-03-20 22:23:15,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-20 22:23:15,912 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 281 transitions. [2022-03-20 22:23:15,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-03-20 22:23:15,913 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:15,913 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:15,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:16,127 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 [2022-03-20 22:23:16,127 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:16,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:16,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1713487146, now seen corresponding path program 51 times [2022-03-20 22:23:16,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:16,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [119558591] [2022-03-20 22:23:16,128 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:16,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1713487146, now seen corresponding path program 52 times [2022-03-20 22:23:16,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:16,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72709052] [2022-03-20 22:23:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:16,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:16,135 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:16,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144435679] [2022-03-20 22:23:16,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:23:16,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:16,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:16,140 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) [2022-03-20 22:23:16,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 22:23:16,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:23:16,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:16,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 22:23:16,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3033 backedges. 52 proven. 2977 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:16,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3033 backedges. 52 proven. 1677 refuted. 0 times theorem prover too weak. 1304 trivial. 0 not checked. [2022-03-20 22:23:17,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:17,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72709052] [2022-03-20 22:23:17,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:17,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144435679] [2022-03-20 22:23:17,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144435679] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:17,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:17,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2022-03-20 22:23:17,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:17,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [119558591] [2022-03-20 22:23:17,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [119558591] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:17,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:17,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 22:23:17,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046444078] [2022-03-20 22:23:17,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:17,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 22:23:17,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:17,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 22:23:17,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1545, Invalid=1761, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 22:23:17,763 INFO L87 Difference]: Start difference. First operand 254 states and 281 transitions. Second operand has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-20 22:23:18,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:18,062 INFO L93 Difference]: Finished difference Result 268 states and 296 transitions. [2022-03-20 22:23:18,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 22:23:18,062 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) Word has length 257 [2022-03-20 22:23:18,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:18,064 INFO L225 Difference]: With dead ends: 268 [2022-03-20 22:23:18,064 INFO L226 Difference]: Without dead ends: 263 [2022-03-20 22:23:18,065 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3027, Invalid=3945, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 22:23:18,065 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 85 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:18,065 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 296 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:18,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-20 22:23:18,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-03-20 22:23:18,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 201 states have (on average 1.1393034825870647) internal successors, (229), 201 states have internal predecessors, (229), 32 states have call successors, (32), 31 states have call predecessors, (32), 29 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 22:23:18,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 291 transitions. [2022-03-20 22:23:18,078 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 291 transitions. Word has length 257 [2022-03-20 22:23:18,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:18,078 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 291 transitions. [2022-03-20 22:23:18,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-20 22:23:18,079 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 291 transitions. [2022-03-20 22:23:18,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-03-20 22:23:18,080 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:18,080 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:18,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:18,294 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 [2022-03-20 22:23:18,294 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:18,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:18,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1462406492, now seen corresponding path program 53 times [2022-03-20 22:23:18,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:18,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1191688886] [2022-03-20 22:23:18,295 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:18,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1462406492, now seen corresponding path program 54 times [2022-03-20 22:23:18,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:18,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142401708] [2022-03-20 22:23:18,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:18,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:18,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:18,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056049710] [2022-03-20 22:23:18,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:23:18,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:18,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:18,312 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) [2022-03-20 22:23:18,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 22:23:18,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-20 22:23:18,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:18,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 22:23:18,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3271 backedges. 54 proven. 3213 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:19,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3271 backedges. 54 proven. 1809 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2022-03-20 22:23:19,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:19,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142401708] [2022-03-20 22:23:19,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:19,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056049710] [2022-03-20 22:23:19,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056049710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:19,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:19,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2022-03-20 22:23:19,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:19,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1191688886] [2022-03-20 22:23:19,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1191688886] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:19,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:19,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 22:23:19,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721900958] [2022-03-20 22:23:19,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:19,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 22:23:19,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:19,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 22:23:19,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=1882, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 22:23:19,696 INFO L87 Difference]: Start difference. First operand 263 states and 291 transitions. Second operand has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-20 22:23:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:20,086 INFO L93 Difference]: Finished difference Result 277 states and 306 transitions. [2022-03-20 22:23:20,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 22:23:20,086 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) Word has length 266 [2022-03-20 22:23:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:20,087 INFO L225 Difference]: With dead ends: 277 [2022-03-20 22:23:20,087 INFO L226 Difference]: Without dead ends: 272 [2022-03-20 22:23:20,088 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3251, Invalid=4231, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 22:23:20,088 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 96 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:20,088 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 292 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:20,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-20 22:23:20,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-03-20 22:23:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 208 states have (on average 1.1394230769230769) internal successors, (237), 208 states have internal predecessors, (237), 33 states have call successors, (33), 32 states have call predecessors, (33), 30 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 22:23:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 301 transitions. [2022-03-20 22:23:20,101 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 301 transitions. Word has length 266 [2022-03-20 22:23:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:20,102 INFO L478 AbstractCegarLoop]: Abstraction has 272 states and 301 transitions. [2022-03-20 22:23:20,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-20 22:23:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 301 transitions. [2022-03-20 22:23:20,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-03-20 22:23:20,103 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:20,103 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:20,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:20,320 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 [2022-03-20 22:23:20,320 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:20,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:20,321 INFO L85 PathProgramCache]: Analyzing trace with hash -394085994, now seen corresponding path program 55 times [2022-03-20 22:23:20,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:20,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1016502232] [2022-03-20 22:23:20,321 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:20,321 INFO L85 PathProgramCache]: Analyzing trace with hash -394085994, now seen corresponding path program 56 times [2022-03-20 22:23:20,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:20,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717976505] [2022-03-20 22:23:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:20,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:20,328 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:20,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971865179] [2022-03-20 22:23:20,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:23:20,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:20,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:20,331 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) [2022-03-20 22:23:20,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 22:23:20,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:23:20,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:20,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 22:23:20,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3518 backedges. 56 proven. 3458 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:21,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3518 backedges. 56 proven. 1946 refuted. 0 times theorem prover too weak. 1516 trivial. 0 not checked. [2022-03-20 22:23:21,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:21,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717976505] [2022-03-20 22:23:21,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:21,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971865179] [2022-03-20 22:23:21,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971865179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:21,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:21,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2022-03-20 22:23:21,986 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:21,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1016502232] [2022-03-20 22:23:21,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1016502232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:21,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:21,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 22:23:21,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559198974] [2022-03-20 22:23:21,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:21,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 22:23:21,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:21,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 22:23:21,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1775, Invalid=2007, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 22:23:21,988 INFO L87 Difference]: Start difference. First operand 272 states and 301 transitions. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-20 22:23:22,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:22,448 INFO L93 Difference]: Finished difference Result 286 states and 316 transitions. [2022-03-20 22:23:22,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 22:23:22,449 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) Word has length 275 [2022-03-20 22:23:22,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:22,450 INFO L225 Difference]: With dead ends: 286 [2022-03-20 22:23:22,450 INFO L226 Difference]: Without dead ends: 281 [2022-03-20 22:23:22,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3483, Invalid=4527, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 22:23:22,451 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 100 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:22,451 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 330 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-20 22:23:22,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-03-20 22:23:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 215 states have (on average 1.1395348837209303) internal successors, (245), 215 states have internal predecessors, (245), 34 states have call successors, (34), 33 states have call predecessors, (34), 31 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 22:23:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 311 transitions. [2022-03-20 22:23:22,466 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 311 transitions. Word has length 275 [2022-03-20 22:23:22,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:22,466 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 311 transitions. [2022-03-20 22:23:22,466 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-20 22:23:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 311 transitions. [2022-03-20 22:23:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-03-20 22:23:22,467 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:22,467 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:22,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:22,683 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 [2022-03-20 22:23:22,683 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:22,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:22,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1379905180, now seen corresponding path program 57 times [2022-03-20 22:23:22,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:22,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [899499506] [2022-03-20 22:23:22,684 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:22,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1379905180, now seen corresponding path program 58 times [2022-03-20 22:23:22,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:22,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297909951] [2022-03-20 22:23:22,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:22,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:22,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:22,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497820899] [2022-03-20 22:23:22,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:23:22,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:22,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:22,693 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) [2022-03-20 22:23:22,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 22:23:22,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:23:22,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:22,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 22:23:22,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 58 proven. 3712 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:23,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 58 proven. 2088 refuted. 0 times theorem prover too weak. 1628 trivial. 0 not checked. [2022-03-20 22:23:24,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:24,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297909951] [2022-03-20 22:23:24,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:24,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497820899] [2022-03-20 22:23:24,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497820899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:24,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:24,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2022-03-20 22:23:24,661 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:24,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [899499506] [2022-03-20 22:23:24,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [899499506] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:24,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:24,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 22:23:24,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975586933] [2022-03-20 22:23:24,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:24,661 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 22:23:24,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:24,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 22:23:24,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1896, Invalid=2136, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 22:23:24,662 INFO L87 Difference]: Start difference. First operand 281 states and 311 transitions. Second operand has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-20 22:23:25,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:25,133 INFO L93 Difference]: Finished difference Result 295 states and 326 transitions. [2022-03-20 22:23:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 22:23:25,133 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) Word has length 284 [2022-03-20 22:23:25,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:25,134 INFO L225 Difference]: With dead ends: 295 [2022-03-20 22:23:25,134 INFO L226 Difference]: Without dead ends: 290 [2022-03-20 22:23:25,135 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3723, Invalid=4833, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 22:23:25,136 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 111 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:25,136 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 332 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:25,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-20 22:23:25,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-03-20 22:23:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 222 states have (on average 1.1396396396396395) internal successors, (253), 222 states have internal predecessors, (253), 35 states have call successors, (35), 34 states have call predecessors, (35), 32 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 22:23:25,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 321 transitions. [2022-03-20 22:23:25,149 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 321 transitions. Word has length 284 [2022-03-20 22:23:25,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:25,150 INFO L478 AbstractCegarLoop]: Abstraction has 290 states and 321 transitions. [2022-03-20 22:23:25,150 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-20 22:23:25,150 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 321 transitions. [2022-03-20 22:23:25,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-03-20 22:23:25,151 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:25,151 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:25,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:25,363 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 [2022-03-20 22:23:25,363 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:25,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:25,364 INFO L85 PathProgramCache]: Analyzing trace with hash 520028246, now seen corresponding path program 59 times [2022-03-20 22:23:25,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:25,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1252568409] [2022-03-20 22:23:25,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:25,364 INFO L85 PathProgramCache]: Analyzing trace with hash 520028246, now seen corresponding path program 60 times [2022-03-20 22:23:25,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:25,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206078895] [2022-03-20 22:23:25,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:25,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:25,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:25,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184699761] [2022-03-20 22:23:25,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:23:25,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:25,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:25,374 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) [2022-03-20 22:23:25,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 22:23:25,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-20 22:23:25,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:25,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 22:23:25,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:26,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4039 backedges. 60 proven. 3975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:26,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4039 backedges. 60 proven. 2235 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2022-03-20 22:23:27,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:27,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206078895] [2022-03-20 22:23:27,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:27,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184699761] [2022-03-20 22:23:27,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184699761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:27,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:27,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2022-03-20 22:23:27,269 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:27,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1252568409] [2022-03-20 22:23:27,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1252568409] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:27,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:27,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 22:23:27,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393401901] [2022-03-20 22:23:27,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:27,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 22:23:27,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:27,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 22:23:27,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 22:23:27,271 INFO L87 Difference]: Start difference. First operand 290 states and 321 transitions. Second operand has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-20 22:23:27,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:27,754 INFO L93 Difference]: Finished difference Result 304 states and 336 transitions. [2022-03-20 22:23:27,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 22:23:27,755 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) Word has length 293 [2022-03-20 22:23:27,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:27,756 INFO L225 Difference]: With dead ends: 304 [2022-03-20 22:23:27,756 INFO L226 Difference]: Without dead ends: 299 [2022-03-20 22:23:27,757 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3971, Invalid=5149, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 22:23:27,757 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 160 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:27,757 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 304 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:27,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-20 22:23:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-03-20 22:23:27,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 229 states have internal predecessors, (261), 36 states have call successors, (36), 35 states have call predecessors, (36), 33 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 22:23:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 331 transitions. [2022-03-20 22:23:27,771 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 331 transitions. Word has length 293 [2022-03-20 22:23:27,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:27,771 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 331 transitions. [2022-03-20 22:23:27,771 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-20 22:23:27,771 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 331 transitions. [2022-03-20 22:23:27,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-03-20 22:23:27,772 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:27,772 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:27,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:27,989 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 [2022-03-20 22:23:27,990 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:27,990 INFO L85 PathProgramCache]: Analyzing trace with hash -213450788, now seen corresponding path program 61 times [2022-03-20 22:23:27,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:27,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [512078674] [2022-03-20 22:23:27,990 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:27,991 INFO L85 PathProgramCache]: Analyzing trace with hash -213450788, now seen corresponding path program 62 times [2022-03-20 22:23:27,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:27,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002835854] [2022-03-20 22:23:27,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:27,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:27,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:27,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036586216] [2022-03-20 22:23:27,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:23:27,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:27,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:27,998 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) [2022-03-20 22:23:27,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 22:23:28,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:23:28,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:28,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 22:23:28,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 62 proven. 4247 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:28,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 62 proven. 2387 refuted. 0 times theorem prover too weak. 1864 trivial. 0 not checked. [2022-03-20 22:23:30,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:30,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002835854] [2022-03-20 22:23:30,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:30,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036586216] [2022-03-20 22:23:30,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036586216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:30,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:30,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2022-03-20 22:23:30,147 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:30,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [512078674] [2022-03-20 22:23:30,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [512078674] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:30,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:30,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 22:23:30,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618285481] [2022-03-20 22:23:30,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:30,148 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 22:23:30,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:30,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 22:23:30,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=2406, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 22:23:30,149 INFO L87 Difference]: Start difference. First operand 299 states and 331 transitions. Second operand has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-20 22:23:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:30,692 INFO L93 Difference]: Finished difference Result 313 states and 346 transitions. [2022-03-20 22:23:30,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 22:23:30,692 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) Word has length 302 [2022-03-20 22:23:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:30,693 INFO L225 Difference]: With dead ends: 313 [2022-03-20 22:23:30,693 INFO L226 Difference]: Without dead ends: 308 [2022-03-20 22:23:30,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4227, Invalid=5475, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 22:23:30,694 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 118 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:30,694 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 324 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-20 22:23:30,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-03-20 22:23:30,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 236 states have (on average 1.1398305084745763) internal successors, (269), 236 states have internal predecessors, (269), 37 states have call successors, (37), 36 states have call predecessors, (37), 34 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 22:23:30,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 341 transitions. [2022-03-20 22:23:30,708 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 341 transitions. Word has length 302 [2022-03-20 22:23:30,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:30,708 INFO L478 AbstractCegarLoop]: Abstraction has 308 states and 341 transitions. [2022-03-20 22:23:30,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-20 22:23:30,708 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 341 transitions. [2022-03-20 22:23:30,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-03-20 22:23:30,710 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:30,710 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:30,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:30,926 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 [2022-03-20 22:23:30,926 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:30,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:30,927 INFO L85 PathProgramCache]: Analyzing trace with hash 83826454, now seen corresponding path program 63 times [2022-03-20 22:23:30,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:30,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [296178187] [2022-03-20 22:23:30,927 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:30,927 INFO L85 PathProgramCache]: Analyzing trace with hash 83826454, now seen corresponding path program 64 times [2022-03-20 22:23:30,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:30,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316222767] [2022-03-20 22:23:30,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:30,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:30,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:30,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1733802039] [2022-03-20 22:23:30,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:23:30,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:30,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:30,936 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) [2022-03-20 22:23:30,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 22:23:31,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:23:31,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:31,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 22:23:31,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 64 proven. 4528 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:31,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 64 proven. 2544 refuted. 0 times theorem prover too weak. 1988 trivial. 0 not checked. [2022-03-20 22:23:33,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:33,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316222767] [2022-03-20 22:23:33,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:33,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733802039] [2022-03-20 22:23:33,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733802039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:33,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:33,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2022-03-20 22:23:33,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:33,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [296178187] [2022-03-20 22:23:33,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [296178187] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:33,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:33,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 22:23:33,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626927723] [2022-03-20 22:23:33,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:33,113 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 22:23:33,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:33,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 22:23:33,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2283, Invalid=2547, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 22:23:33,114 INFO L87 Difference]: Start difference. First operand 308 states and 341 transitions. Second operand has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-20 22:23:33,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:33,658 INFO L93 Difference]: Finished difference Result 322 states and 356 transitions. [2022-03-20 22:23:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 22:23:33,659 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) Word has length 311 [2022-03-20 22:23:33,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:33,660 INFO L225 Difference]: With dead ends: 322 [2022-03-20 22:23:33,660 INFO L226 Difference]: Without dead ends: 317 [2022-03-20 22:23:33,661 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4491, Invalid=5811, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 22:23:33,662 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 151 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:33,662 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 332 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:33,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-03-20 22:23:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2022-03-20 22:23:33,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 243 states have (on average 1.139917695473251) internal successors, (277), 243 states have internal predecessors, (277), 38 states have call successors, (38), 37 states have call predecessors, (38), 35 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 22:23:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 351 transitions. [2022-03-20 22:23:33,677 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 351 transitions. Word has length 311 [2022-03-20 22:23:33,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:33,677 INFO L478 AbstractCegarLoop]: Abstraction has 317 states and 351 transitions. [2022-03-20 22:23:33,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-20 22:23:33,678 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 351 transitions. [2022-03-20 22:23:33,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-03-20 22:23:33,679 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:33,679 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:33,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:33,896 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 [2022-03-20 22:23:33,896 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:33,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:33,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1410629916, now seen corresponding path program 65 times [2022-03-20 22:23:33,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:33,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1569008856] [2022-03-20 22:23:33,897 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:33,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1410629916, now seen corresponding path program 66 times [2022-03-20 22:23:33,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:33,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135402997] [2022-03-20 22:23:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:33,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:33,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:33,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974150283] [2022-03-20 22:23:33,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:23:33,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:33,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:33,908 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) [2022-03-20 22:23:33,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 22:23:34,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-03-20 22:23:34,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:34,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 22:23:34,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4888 backedges. 66 proven. 4818 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:34,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4888 backedges. 66 proven. 2706 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-03-20 22:23:35,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:35,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135402997] [2022-03-20 22:23:35,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:35,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974150283] [2022-03-20 22:23:35,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974150283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:35,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:35,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2022-03-20 22:23:35,653 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:35,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1569008856] [2022-03-20 22:23:35,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1569008856] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:35,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:35,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 22:23:35,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797874150] [2022-03-20 22:23:35,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:35,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 22:23:35,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:35,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 22:23:35,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2420, Invalid=2692, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 22:23:35,666 INFO L87 Difference]: Start difference. First operand 317 states and 351 transitions. Second operand has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-20 22:23:36,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:36,102 INFO L93 Difference]: Finished difference Result 331 states and 366 transitions. [2022-03-20 22:23:36,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 22:23:36,102 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) Word has length 320 [2022-03-20 22:23:36,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:36,105 INFO L225 Difference]: With dead ends: 331 [2022-03-20 22:23:36,106 INFO L226 Difference]: Without dead ends: 326 [2022-03-20 22:23:36,107 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4763, Invalid=6157, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 22:23:36,107 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 128 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:36,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 358 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:36,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-20 22:23:36,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2022-03-20 22:23:36,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 250 states have (on average 1.14) internal successors, (285), 250 states have internal predecessors, (285), 39 states have call successors, (39), 38 states have call predecessors, (39), 36 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 22:23:36,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 361 transitions. [2022-03-20 22:23:36,137 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 361 transitions. Word has length 320 [2022-03-20 22:23:36,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:36,137 INFO L478 AbstractCegarLoop]: Abstraction has 326 states and 361 transitions. [2022-03-20 22:23:36,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-20 22:23:36,137 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 361 transitions. [2022-03-20 22:23:36,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-03-20 22:23:36,139 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:36,139 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:36,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:36,356 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 [2022-03-20 22:23:36,356 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:36,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:36,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1328479702, now seen corresponding path program 67 times [2022-03-20 22:23:36,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:36,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [141076341] [2022-03-20 22:23:36,357 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:36,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1328479702, now seen corresponding path program 68 times [2022-03-20 22:23:36,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:36,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826444572] [2022-03-20 22:23:36,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:36,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:36,365 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:36,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [144819000] [2022-03-20 22:23:36,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:23:36,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:36,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:36,366 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) [2022-03-20 22:23:36,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 22:23:36,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:23:36,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:36,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 22:23:36,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5189 backedges. 68 proven. 5117 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:37,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5189 backedges. 68 proven. 2873 refuted. 0 times theorem prover too weak. 2248 trivial. 0 not checked. [2022-03-20 22:23:38,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:38,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826444572] [2022-03-20 22:23:38,087 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:38,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144819000] [2022-03-20 22:23:38,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144819000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:38,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:38,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 74 [2022-03-20 22:23:38,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:38,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [141076341] [2022-03-20 22:23:38,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [141076341] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:38,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:38,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 22:23:38,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633289297] [2022-03-20 22:23:38,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:38,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 22:23:38,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:38,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 22:23:38,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2561, Invalid=2841, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 22:23:38,090 INFO L87 Difference]: Start difference. First operand 326 states and 361 transitions. Second operand has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-20 22:23:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:38,688 INFO L93 Difference]: Finished difference Result 340 states and 376 transitions. [2022-03-20 22:23:38,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 22:23:38,688 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) Word has length 329 [2022-03-20 22:23:38,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:38,689 INFO L225 Difference]: With dead ends: 340 [2022-03-20 22:23:38,689 INFO L226 Difference]: Without dead ends: 335 [2022-03-20 22:23:38,690 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5043, Invalid=6513, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 22:23:38,691 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 157 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:38,692 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 348 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:38,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-03-20 22:23:38,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2022-03-20 22:23:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 257 states have (on average 1.140077821011673) internal successors, (293), 257 states have internal predecessors, (293), 40 states have call successors, (40), 39 states have call predecessors, (40), 37 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 22:23:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 371 transitions. [2022-03-20 22:23:38,731 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 371 transitions. Word has length 329 [2022-03-20 22:23:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:38,731 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 371 transitions. [2022-03-20 22:23:38,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-20 22:23:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 371 transitions. [2022-03-20 22:23:38,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-03-20 22:23:38,732 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:38,732 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:38,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:38,955 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 [2022-03-20 22:23:38,956 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:38,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:38,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1098658396, now seen corresponding path program 69 times [2022-03-20 22:23:38,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:38,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1228293772] [2022-03-20 22:23:38,956 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:38,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1098658396, now seen corresponding path program 70 times [2022-03-20 22:23:38,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:38,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919014008] [2022-03-20 22:23:38,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:38,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:38,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:38,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [407955831] [2022-03-20 22:23:38,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:23:38,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:38,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:38,966 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) [2022-03-20 22:23:38,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 22:23:39,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:23:39,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:39,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 898 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-20 22:23:39,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 70 proven. 5425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:40,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 70 proven. 3045 refuted. 0 times theorem prover too weak. 2384 trivial. 0 not checked. [2022-03-20 22:23:41,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:41,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919014008] [2022-03-20 22:23:41,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:41,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407955831] [2022-03-20 22:23:41,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407955831] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:41,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:41,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 76 [2022-03-20 22:23:41,669 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:41,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1228293772] [2022-03-20 22:23:41,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1228293772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:41,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:41,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 22:23:41,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139829371] [2022-03-20 22:23:41,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:41,669 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 22:23:41,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:41,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 22:23:41,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2706, Invalid=2994, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 22:23:41,670 INFO L87 Difference]: Start difference. First operand 335 states and 371 transitions. Second operand has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-20 22:23:42,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:42,349 INFO L93 Difference]: Finished difference Result 349 states and 386 transitions. [2022-03-20 22:23:42,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 22:23:42,349 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) Word has length 338 [2022-03-20 22:23:42,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:42,350 INFO L225 Difference]: With dead ends: 349 [2022-03-20 22:23:42,351 INFO L226 Difference]: Without dead ends: 344 [2022-03-20 22:23:42,352 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5331, Invalid=6879, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 22:23:42,352 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 121 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:42,353 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 368 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:23:42,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-03-20 22:23:42,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-03-20 22:23:42,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 264 states have (on average 1.1401515151515151) internal successors, (301), 264 states have internal predecessors, (301), 41 states have call successors, (41), 40 states have call predecessors, (41), 38 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-20 22:23:42,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 381 transitions. [2022-03-20 22:23:42,381 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 381 transitions. Word has length 338 [2022-03-20 22:23:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:42,381 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 381 transitions. [2022-03-20 22:23:42,381 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-20 22:23:42,382 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 381 transitions. [2022-03-20 22:23:42,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-03-20 22:23:42,383 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:42,383 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:42,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:42,600 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 [2022-03-20 22:23:42,601 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:42,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:42,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1597682838, now seen corresponding path program 71 times [2022-03-20 22:23:42,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:42,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1166931715] [2022-03-20 22:23:42,601 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:42,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1597682838, now seen corresponding path program 72 times [2022-03-20 22:23:42,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:42,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335728449] [2022-03-20 22:23:42,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:42,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:42,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:42,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744052581] [2022-03-20 22:23:42,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:23:42,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:42,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:42,611 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) [2022-03-20 22:23:42,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 22:23:42,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-20 22:23:42,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:42,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 22:23:42,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5818 backedges. 72 proven. 5742 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:43,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5818 backedges. 72 proven. 3222 refuted. 0 times theorem prover too weak. 2524 trivial. 0 not checked. [2022-03-20 22:23:44,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:44,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335728449] [2022-03-20 22:23:44,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:44,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744052581] [2022-03-20 22:23:44,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744052581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:44,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:44,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2022-03-20 22:23:44,723 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:44,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1166931715] [2022-03-20 22:23:44,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1166931715] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:44,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:44,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 22:23:44,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095578189] [2022-03-20 22:23:44,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:44,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 22:23:44,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:44,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 22:23:44,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2855, Invalid=3151, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 22:23:44,725 INFO L87 Difference]: Start difference. First operand 344 states and 381 transitions. Second operand has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-20 22:23:45,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:45,171 INFO L93 Difference]: Finished difference Result 358 states and 396 transitions. [2022-03-20 22:23:45,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 22:23:45,171 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) Word has length 347 [2022-03-20 22:23:45,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:45,172 INFO L225 Difference]: With dead ends: 358 [2022-03-20 22:23:45,172 INFO L226 Difference]: Without dead ends: 353 [2022-03-20 22:23:45,174 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 617 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5627, Invalid=7255, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 22:23:45,174 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 135 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:45,174 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 370 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:45,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-03-20 22:23:45,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-03-20 22:23:45,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 271 states have (on average 1.1402214022140222) internal successors, (309), 271 states have internal predecessors, (309), 42 states have call successors, (42), 41 states have call predecessors, (42), 39 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-20 22:23:45,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 391 transitions. [2022-03-20 22:23:45,191 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 391 transitions. Word has length 347 [2022-03-20 22:23:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:45,191 INFO L478 AbstractCegarLoop]: Abstraction has 353 states and 391 transitions. [2022-03-20 22:23:45,191 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-20 22:23:45,191 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 391 transitions. [2022-03-20 22:23:45,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-03-20 22:23:45,193 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:45,193 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 37, 37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:45,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:45,403 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 [2022-03-20 22:23:45,403 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:45,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:45,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2068976540, now seen corresponding path program 73 times [2022-03-20 22:23:45,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:45,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [729535462] [2022-03-20 22:23:45,404 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:45,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2068976540, now seen corresponding path program 74 times [2022-03-20 22:23:45,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:45,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635921547] [2022-03-20 22:23:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:45,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:45,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:45,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112621850] [2022-03-20 22:23:45,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:23:45,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:45,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:45,420 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) [2022-03-20 22:23:45,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 22:23:45,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:23:45,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:45,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 22:23:45,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6146 backedges. 74 proven. 6068 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:46,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6146 backedges. 74 proven. 3404 refuted. 0 times theorem prover too weak. 2668 trivial. 0 not checked. [2022-03-20 22:23:48,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:48,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635921547] [2022-03-20 22:23:48,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:48,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112621850] [2022-03-20 22:23:48,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112621850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:48,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:48,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2022-03-20 22:23:48,200 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:48,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [729535462] [2022-03-20 22:23:48,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [729535462] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:48,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:48,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 22:23:48,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810416689] [2022-03-20 22:23:48,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:48,200 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 22:23:48,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:48,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 22:23:48,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3008, Invalid=3312, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 22:23:48,202 INFO L87 Difference]: Start difference. First operand 353 states and 391 transitions. Second operand has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-20 22:23:48,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:48,895 INFO L93 Difference]: Finished difference Result 367 states and 406 transitions. [2022-03-20 22:23:48,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 22:23:48,896 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) Word has length 356 [2022-03-20 22:23:48,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:48,897 INFO L225 Difference]: With dead ends: 367 [2022-03-20 22:23:48,897 INFO L226 Difference]: Without dead ends: 362 [2022-03-20 22:23:48,898 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 633 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5931, Invalid=7641, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 22:23:48,898 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 142 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:48,898 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 372 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:48,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-20 22:23:48,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2022-03-20 22:23:48,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 278 states have (on average 1.1402877697841727) internal successors, (317), 278 states have internal predecessors, (317), 43 states have call successors, (43), 42 states have call predecessors, (43), 40 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 22:23:48,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 401 transitions. [2022-03-20 22:23:48,914 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 401 transitions. Word has length 356 [2022-03-20 22:23:48,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:48,915 INFO L478 AbstractCegarLoop]: Abstraction has 362 states and 401 transitions. [2022-03-20 22:23:48,915 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-20 22:23:48,915 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 401 transitions. [2022-03-20 22:23:48,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-03-20 22:23:48,916 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:48,916 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 38, 38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:48,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:49,133 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 [2022-03-20 22:23:49,133 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:49,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:49,134 INFO L85 PathProgramCache]: Analyzing trace with hash 63847254, now seen corresponding path program 75 times [2022-03-20 22:23:49,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:49,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [606985445] [2022-03-20 22:23:49,134 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:49,134 INFO L85 PathProgramCache]: Analyzing trace with hash 63847254, now seen corresponding path program 76 times [2022-03-20 22:23:49,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:49,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649903093] [2022-03-20 22:23:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:49,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:49,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:49,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906856891] [2022-03-20 22:23:49,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:23:49,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:49,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:49,142 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) [2022-03-20 22:23:49,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 22:23:49,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:23:49,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:49,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 22:23:49,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6483 backedges. 76 proven. 6403 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:50,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6483 backedges. 76 proven. 3591 refuted. 0 times theorem prover too weak. 2816 trivial. 0 not checked. [2022-03-20 22:23:52,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:52,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649903093] [2022-03-20 22:23:52,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:52,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906856891] [2022-03-20 22:23:52,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906856891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:52,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:52,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2022-03-20 22:23:52,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:52,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [606985445] [2022-03-20 22:23:52,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [606985445] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:52,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:52,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 22:23:52,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947411723] [2022-03-20 22:23:52,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:52,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 22:23:52,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:52,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 22:23:52,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3165, Invalid=3477, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 22:23:52,058 INFO L87 Difference]: Start difference. First operand 362 states and 401 transitions. Second operand has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-20 22:23:52,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:52,791 INFO L93 Difference]: Finished difference Result 376 states and 416 transitions. [2022-03-20 22:23:52,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 22:23:52,791 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) Word has length 365 [2022-03-20 22:23:52,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:52,793 INFO L225 Difference]: With dead ends: 376 [2022-03-20 22:23:52,793 INFO L226 Difference]: Without dead ends: 371 [2022-03-20 22:23:52,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 649 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=6243, Invalid=8037, Unknown=0, NotChecked=0, Total=14280 [2022-03-20 22:23:52,794 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 159 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:52,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 386 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:23:52,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-03-20 22:23:52,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-03-20 22:23:52,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 285 states have (on average 1.1403508771929824) internal successors, (325), 285 states have internal predecessors, (325), 44 states have call successors, (44), 43 states have call predecessors, (44), 41 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-20 22:23:52,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 411 transitions. [2022-03-20 22:23:52,810 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 411 transitions. Word has length 365 [2022-03-20 22:23:52,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:52,810 INFO L478 AbstractCegarLoop]: Abstraction has 371 states and 411 transitions. [2022-03-20 22:23:52,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-20 22:23:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 411 transitions. [2022-03-20 22:23:52,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-03-20 22:23:52,812 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:52,812 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:52,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:53,029 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 [2022-03-20 22:23:53,029 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:53,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:53,029 INFO L85 PathProgramCache]: Analyzing trace with hash -194370340, now seen corresponding path program 77 times [2022-03-20 22:23:53,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:53,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1032308816] [2022-03-20 22:23:53,030 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:53,030 INFO L85 PathProgramCache]: Analyzing trace with hash -194370340, now seen corresponding path program 78 times [2022-03-20 22:23:53,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:53,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337602486] [2022-03-20 22:23:53,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:53,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:53,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:53,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891187947] [2022-03-20 22:23:53,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:23:53,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:53,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:53,043 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) [2022-03-20 22:23:53,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 22:23:53,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-03-20 22:23:53,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:53,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 22:23:53,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:54,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6829 backedges. 78 proven. 6747 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:54,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6829 backedges. 78 proven. 3783 refuted. 0 times theorem prover too weak. 2968 trivial. 0 not checked. [2022-03-20 22:23:55,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:55,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337602486] [2022-03-20 22:23:55,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:55,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891187947] [2022-03-20 22:23:55,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891187947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:55,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:55,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 84 [2022-03-20 22:23:55,453 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:55,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1032308816] [2022-03-20 22:23:55,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1032308816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:55,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:55,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 22:23:55,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386143412] [2022-03-20 22:23:55,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:55,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 22:23:55,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:55,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 22:23:55,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3326, Invalid=3646, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 22:23:55,454 INFO L87 Difference]: Start difference. First operand 371 states and 411 transitions. Second operand has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-20 22:23:55,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:55,941 INFO L93 Difference]: Finished difference Result 385 states and 426 transitions. [2022-03-20 22:23:55,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 22:23:55,971 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) Word has length 374 [2022-03-20 22:23:55,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:55,972 INFO L225 Difference]: With dead ends: 385 [2022-03-20 22:23:55,972 INFO L226 Difference]: Without dead ends: 380 [2022-03-20 22:23:55,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=6563, Invalid=8443, Unknown=0, NotChecked=0, Total=15006 [2022-03-20 22:23:55,992 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 116 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:55,993 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 400 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:55,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-03-20 22:23:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-03-20 22:23:56,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 292 states have (on average 1.1404109589041096) internal successors, (333), 292 states have internal predecessors, (333), 45 states have call successors, (45), 44 states have call predecessors, (45), 42 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-20 22:23:56,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 421 transitions. [2022-03-20 22:23:56,019 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 421 transitions. Word has length 374 [2022-03-20 22:23:56,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:56,020 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 421 transitions. [2022-03-20 22:23:56,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-20 22:23:56,021 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 421 transitions. [2022-03-20 22:23:56,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-03-20 22:23:56,022 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:56,022 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 40, 40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:56,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:56,223 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 [2022-03-20 22:23:56,223 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:56,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:56,223 INFO L85 PathProgramCache]: Analyzing trace with hash 949326358, now seen corresponding path program 79 times [2022-03-20 22:23:56,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:56,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2136397501] [2022-03-20 22:23:56,224 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:56,224 INFO L85 PathProgramCache]: Analyzing trace with hash 949326358, now seen corresponding path program 80 times [2022-03-20 22:23:56,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:56,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116394454] [2022-03-20 22:23:56,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:56,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:56,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:56,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417533293] [2022-03-20 22:23:56,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:23:56,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:56,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:56,234 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) [2022-03-20 22:23:56,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 22:23:56,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:23:56,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:56,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-20 22:23:56,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:23:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7184 backedges. 80 proven. 7100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:23:56,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:23:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7184 backedges. 80 proven. 3980 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2022-03-20 22:23:58,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:23:58,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116394454] [2022-03-20 22:23:58,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:23:58,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417533293] [2022-03-20 22:23:58,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417533293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:23:58,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:23:58,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 86 [2022-03-20 22:23:58,116 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:23:58,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2136397501] [2022-03-20 22:23:58,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2136397501] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:23:58,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:23:58,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 22:23:58,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022218945] [2022-03-20 22:23:58,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:23:58,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 22:23:58,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:58,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 22:23:58,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3491, Invalid=3819, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 22:23:58,118 INFO L87 Difference]: Start difference. First operand 380 states and 421 transitions. Second operand has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-20 22:23:58,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:23:58,635 INFO L93 Difference]: Finished difference Result 394 states and 436 transitions. [2022-03-20 22:23:58,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 22:23:58,636 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) Word has length 383 [2022-03-20 22:23:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:23:58,640 INFO L225 Difference]: With dead ends: 394 [2022-03-20 22:23:58,640 INFO L226 Difference]: Without dead ends: 389 [2022-03-20 22:23:58,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=6891, Invalid=8859, Unknown=0, NotChecked=0, Total=15750 [2022-03-20 22:23:58,642 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 148 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:23:58,642 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 396 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:23:58,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-03-20 22:23:58,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2022-03-20 22:23:58,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 299 states have (on average 1.140468227424749) internal successors, (341), 299 states have internal predecessors, (341), 46 states have call successors, (46), 45 states have call predecessors, (46), 43 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 22:23:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 431 transitions. [2022-03-20 22:23:58,675 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 431 transitions. Word has length 383 [2022-03-20 22:23:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:23:58,676 INFO L478 AbstractCegarLoop]: Abstraction has 389 states and 431 transitions. [2022-03-20 22:23:58,676 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-20 22:23:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 431 transitions. [2022-03-20 22:23:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-03-20 22:23:58,677 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:23:58,678 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 41, 41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:23:58,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-20 22:23:58,891 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 [2022-03-20 22:23:58,891 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:23:58,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:23:58,892 INFO L85 PathProgramCache]: Analyzing trace with hash 311977500, now seen corresponding path program 81 times [2022-03-20 22:23:58,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:23:58,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1465246445] [2022-03-20 22:23:58,892 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:23:58,892 INFO L85 PathProgramCache]: Analyzing trace with hash 311977500, now seen corresponding path program 82 times [2022-03-20 22:23:58,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:23:58,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060626355] [2022-03-20 22:23:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:23:58,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:23:58,900 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:23:58,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779303802] [2022-03-20 22:23:58,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:23:58,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:23:58,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:23:58,901 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) [2022-03-20 22:23:58,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 22:23:59,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:23:59,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:23:59,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1036 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 22:23:59,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:24:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7548 backedges. 82 proven. 7462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:24:00,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:24:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7548 backedges. 82 proven. 4182 refuted. 0 times theorem prover too weak. 3284 trivial. 0 not checked. [2022-03-20 22:24:01,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:24:01,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060626355] [2022-03-20 22:24:01,438 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:24:01,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779303802] [2022-03-20 22:24:01,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779303802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:24:01,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:24:01,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 88 [2022-03-20 22:24:01,438 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:24:01,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1465246445] [2022-03-20 22:24:01,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1465246445] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:24:01,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:24:01,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 22:24:01,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848460050] [2022-03-20 22:24:01,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:24:01,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 22:24:01,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:01,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 22:24:01,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3660, Invalid=3996, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 22:24:01,440 INFO L87 Difference]: Start difference. First operand 389 states and 431 transitions. Second operand has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) [2022-03-20 22:24:02,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:24:02,292 INFO L93 Difference]: Finished difference Result 403 states and 446 transitions. [2022-03-20 22:24:02,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 22:24:02,292 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) Word has length 392 [2022-03-20 22:24:02,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:24:02,293 INFO L225 Difference]: With dead ends: 403 [2022-03-20 22:24:02,293 INFO L226 Difference]: Without dead ends: 398 [2022-03-20 22:24:02,295 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 697 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=7227, Invalid=9285, Unknown=0, NotChecked=0, Total=16512 [2022-03-20 22:24:02,295 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 181 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:24:02,296 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 410 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:24:02,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-03-20 22:24:02,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2022-03-20 22:24:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 306 states have (on average 1.1405228758169934) internal successors, (349), 306 states have internal predecessors, (349), 47 states have call successors, (47), 46 states have call predecessors, (47), 44 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-20 22:24:02,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 441 transitions. [2022-03-20 22:24:02,330 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 441 transitions. Word has length 392 [2022-03-20 22:24:02,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:24:02,330 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 441 transitions. [2022-03-20 22:24:02,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) [2022-03-20 22:24:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 441 transitions. [2022-03-20 22:24:02,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-03-20 22:24:02,332 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:24:02,332 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 42, 42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:24:02,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-20 22:24:02,549 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 [2022-03-20 22:24:02,549 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:24:02,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:24:02,550 INFO L85 PathProgramCache]: Analyzing trace with hash -432228138, now seen corresponding path program 83 times [2022-03-20 22:24:02,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:02,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [954804668] [2022-03-20 22:24:02,550 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:24:02,550 INFO L85 PathProgramCache]: Analyzing trace with hash -432228138, now seen corresponding path program 84 times [2022-03-20 22:24:02,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:24:02,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334459478] [2022-03-20 22:24:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:24:02,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:24:02,557 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:24:02,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23412293] [2022-03-20 22:24:02,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:24:02,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:02,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:24:02,573 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) [2022-03-20 22:24:02,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 22:24:02,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-03-20 22:24:02,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:24:02,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 22:24:02,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:24:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 84 proven. 7833 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:24:03,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:24:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 84 proven. 4389 refuted. 0 times theorem prover too weak. 3448 trivial. 0 not checked. [2022-03-20 22:24:05,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:24:05,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334459478] [2022-03-20 22:24:05,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:24:05,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23412293] [2022-03-20 22:24:05,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23412293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:24:05,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:24:05,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 90 [2022-03-20 22:24:05,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:24:05,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [954804668] [2022-03-20 22:24:05,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [954804668] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:24:05,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:24:05,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 22:24:05,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420947451] [2022-03-20 22:24:05,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:24:05,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 22:24:05,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:05,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 22:24:05,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3833, Invalid=4177, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 22:24:05,293 INFO L87 Difference]: Start difference. First operand 398 states and 441 transitions. Second operand has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) [2022-03-20 22:24:06,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:24:06,222 INFO L93 Difference]: Finished difference Result 412 states and 456 transitions. [2022-03-20 22:24:06,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 22:24:06,222 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) Word has length 401 [2022-03-20 22:24:06,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:24:06,224 INFO L225 Difference]: With dead ends: 412 [2022-03-20 22:24:06,224 INFO L226 Difference]: Without dead ends: 407 [2022-03-20 22:24:06,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=7571, Invalid=9721, Unknown=0, NotChecked=0, Total=17292 [2022-03-20 22:24:06,225 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 189 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:24:06,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 406 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:24:06,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-03-20 22:24:06,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2022-03-20 22:24:06,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 313 states have (on average 1.1405750798722045) internal successors, (357), 313 states have internal predecessors, (357), 48 states have call successors, (48), 47 states have call predecessors, (48), 45 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-20 22:24:06,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 451 transitions. [2022-03-20 22:24:06,243 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 451 transitions. Word has length 401 [2022-03-20 22:24:06,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:24:06,244 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 451 transitions. [2022-03-20 22:24:06,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) [2022-03-20 22:24:06,244 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 451 transitions. [2022-03-20 22:24:06,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-03-20 22:24:06,246 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:24:06,246 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 43, 43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:24:06,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 22:24:06,459 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-20 22:24:06,459 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:24:06,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:24:06,460 INFO L85 PathProgramCache]: Analyzing trace with hash -290400420, now seen corresponding path program 85 times [2022-03-20 22:24:06,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:06,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1529024603] [2022-03-20 22:24:06,460 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:24:06,460 INFO L85 PathProgramCache]: Analyzing trace with hash -290400420, now seen corresponding path program 86 times [2022-03-20 22:24:06,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:24:06,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313411196] [2022-03-20 22:24:06,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:24:06,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:24:06,468 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:24:06,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494282719] [2022-03-20 22:24:06,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:24:06,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:06,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:24:06,469 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:24:06,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 22:24:06,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:24:06,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:24:06,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-20 22:24:06,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:24:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 8303 backedges. 86 proven. 8213 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:24:07,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:24:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8303 backedges. 86 proven. 4601 refuted. 0 times theorem prover too weak. 3616 trivial. 0 not checked. [2022-03-20 22:24:10,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:24:10,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313411196] [2022-03-20 22:24:10,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:24:10,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494282719] [2022-03-20 22:24:10,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494282719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:24:10,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:24:10,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 92 [2022-03-20 22:24:10,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:24:10,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1529024603] [2022-03-20 22:24:10,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1529024603] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:24:10,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:24:10,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 22:24:10,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549513332] [2022-03-20 22:24:10,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:24:10,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 22:24:10,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:10,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 22:24:10,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4010, Invalid=4362, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 22:24:10,041 INFO L87 Difference]: Start difference. First operand 407 states and 451 transitions. Second operand has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) [2022-03-20 22:24:10,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:24:10,811 INFO L93 Difference]: Finished difference Result 421 states and 466 transitions. [2022-03-20 22:24:10,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 22:24:10,812 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) Word has length 410 [2022-03-20 22:24:10,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:24:10,813 INFO L225 Difference]: With dead ends: 421 [2022-03-20 22:24:10,813 INFO L226 Difference]: Without dead ends: 416 [2022-03-20 22:24:10,814 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 729 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=7923, Invalid=10167, Unknown=0, NotChecked=0, Total=18090 [2022-03-20 22:24:10,815 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 163 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:24:10,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 426 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:24:10,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-03-20 22:24:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2022-03-20 22:24:10,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 320 states have (on average 1.140625) internal successors, (365), 320 states have internal predecessors, (365), 49 states have call successors, (49), 48 states have call predecessors, (49), 46 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-20 22:24:10,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 461 transitions. [2022-03-20 22:24:10,834 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 461 transitions. Word has length 410 [2022-03-20 22:24:10,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:24:10,834 INFO L478 AbstractCegarLoop]: Abstraction has 416 states and 461 transitions. [2022-03-20 22:24:10,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) [2022-03-20 22:24:10,834 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 461 transitions. [2022-03-20 22:24:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-03-20 22:24:10,836 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:24:10,836 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 44, 44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:24:10,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-20 22:24:11,054 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:11,054 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:24:11,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:24:11,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1569738858, now seen corresponding path program 87 times [2022-03-20 22:24:11,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:11,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [240204841] [2022-03-20 22:24:11,055 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:24:11,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1569738858, now seen corresponding path program 88 times [2022-03-20 22:24:11,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:24:11,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062854868] [2022-03-20 22:24:11,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:24:11,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:24:11,065 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:24:11,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371617015] [2022-03-20 22:24:11,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:24:11,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:11,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:24:11,072 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:24:11,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 22:24:11,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:24:11,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:24:11,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-20 22:24:11,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:24:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 88 proven. 8602 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:24:12,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:24:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 88 proven. 4818 refuted. 0 times theorem prover too weak. 3788 trivial. 0 not checked. [2022-03-20 22:24:14,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:24:14,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062854868] [2022-03-20 22:24:14,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:24:14,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371617015] [2022-03-20 22:24:14,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371617015] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:24:14,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:24:14,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2022-03-20 22:24:14,588 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:24:14,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [240204841] [2022-03-20 22:24:14,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [240204841] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:24:14,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:24:14,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 22:24:14,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529480588] [2022-03-20 22:24:14,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:24:14,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 22:24:14,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:14,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 22:24:14,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4191, Invalid=4551, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 22:24:14,590 INFO L87 Difference]: Start difference. First operand 416 states and 461 transitions. Second operand has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) [2022-03-20 22:24:15,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:24:15,446 INFO L93 Difference]: Finished difference Result 430 states and 476 transitions. [2022-03-20 22:24:15,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 22:24:15,446 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) Word has length 419 [2022-03-20 22:24:15,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:24:15,447 INFO L225 Difference]: With dead ends: 430 [2022-03-20 22:24:15,447 INFO L226 Difference]: Without dead ends: 425 [2022-03-20 22:24:15,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 745 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=8283, Invalid=10623, Unknown=0, NotChecked=0, Total=18906 [2022-03-20 22:24:15,450 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 187 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:24:15,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 440 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:24:15,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-20 22:24:15,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2022-03-20 22:24:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 327 states have (on average 1.1406727828746177) internal successors, (373), 327 states have internal predecessors, (373), 50 states have call successors, (50), 49 states have call predecessors, (50), 47 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-20 22:24:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 471 transitions. [2022-03-20 22:24:15,469 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 471 transitions. Word has length 419 [2022-03-20 22:24:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:24:15,470 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 471 transitions. [2022-03-20 22:24:15,470 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) [2022-03-20 22:24:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 471 transitions. [2022-03-20 22:24:15,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-03-20 22:24:15,472 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:24:15,472 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 45, 45, 45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:24:15,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-20 22:24:15,687 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-20 22:24:15,687 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:24:15,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:24:15,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1803061092, now seen corresponding path program 89 times [2022-03-20 22:24:15,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:15,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1707880981] [2022-03-20 22:24:15,688 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:24:15,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1803061092, now seen corresponding path program 90 times [2022-03-20 22:24:15,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:24:15,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443559592] [2022-03-20 22:24:15,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:24:15,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:24:15,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:24:15,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825969599] [2022-03-20 22:24:15,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:24:15,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:15,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:24:15,706 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:24:15,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 22:24:16,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-03-20 22:24:16,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:24:16,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-20 22:24:16,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:24:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9094 backedges. 90 proven. 9000 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:24:17,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:24:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9094 backedges. 90 proven. 5040 refuted. 0 times theorem prover too weak. 3964 trivial. 0 not checked. [2022-03-20 22:24:19,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:24:19,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443559592] [2022-03-20 22:24:19,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:24:19,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825969599] [2022-03-20 22:24:19,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825969599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:24:19,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:24:19,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2022-03-20 22:24:19,375 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:24:19,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1707880981] [2022-03-20 22:24:19,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1707880981] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:24:19,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:24:19,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 22:24:19,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102392630] [2022-03-20 22:24:19,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:24:19,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 22:24:19,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:19,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 22:24:19,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4376, Invalid=4744, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 22:24:19,376 INFO L87 Difference]: Start difference. First operand 425 states and 471 transitions. Second operand has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-03-20 22:24:20,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:24:20,186 INFO L93 Difference]: Finished difference Result 439 states and 486 transitions. [2022-03-20 22:24:20,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 22:24:20,186 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) Word has length 428 [2022-03-20 22:24:20,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:24:20,188 INFO L225 Difference]: With dead ends: 439 [2022-03-20 22:24:20,188 INFO L226 Difference]: Without dead ends: 434 [2022-03-20 22:24:20,190 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=8651, Invalid=11089, Unknown=0, NotChecked=0, Total=19740 [2022-03-20 22:24:20,190 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 206 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:24:20,190 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 454 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:24:20,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-03-20 22:24:20,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2022-03-20 22:24:20,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 334 states have (on average 1.1407185628742516) internal successors, (381), 334 states have internal predecessors, (381), 51 states have call successors, (51), 50 states have call predecessors, (51), 48 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-20 22:24:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 481 transitions. [2022-03-20 22:24:20,210 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 481 transitions. Word has length 428 [2022-03-20 22:24:20,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:24:20,210 INFO L478 AbstractCegarLoop]: Abstraction has 434 states and 481 transitions. [2022-03-20 22:24:20,211 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-03-20 22:24:20,211 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 481 transitions. [2022-03-20 22:24:20,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-03-20 22:24:20,212 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:24:20,213 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:24:20,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-20 22:24:20,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-20 22:24:20,419 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:24:20,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:24:20,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1876588118, now seen corresponding path program 91 times [2022-03-20 22:24:20,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:20,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [124903062] [2022-03-20 22:24:20,420 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:24:20,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1876588118, now seen corresponding path program 92 times [2022-03-20 22:24:20,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:24:20,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629912919] [2022-03-20 22:24:20,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:24:20,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:24:20,429 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:24:20,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553594716] [2022-03-20 22:24:20,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:24:20,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:20,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:24:20,431 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:24:20,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 22:24:20,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:24:20,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:24:20,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1151 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-20 22:24:20,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:24:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:24:21,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:24:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2022-03-20 22:24:22,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:24:22,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629912919] [2022-03-20 22:24:22,840 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:24:22,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553594716] [2022-03-20 22:24:22,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553594716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:24:22,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:24:22,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-03-20 22:24:22,841 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:24:22,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [124903062] [2022-03-20 22:24:22,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [124903062] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:24:22,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:24:22,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 22:24:22,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699422916] [2022-03-20 22:24:22,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:24:22,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 22:24:22,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:22,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 22:24:22,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 22:24:22,843 INFO L87 Difference]: Start difference. First operand 434 states and 481 transitions. Second operand has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) [2022-03-20 22:24:23,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:24:23,671 INFO L93 Difference]: Finished difference Result 448 states and 496 transitions. [2022-03-20 22:24:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-20 22:24:23,671 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) Word has length 437 [2022-03-20 22:24:23,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:24:23,672 INFO L225 Difference]: With dead ends: 448 [2022-03-20 22:24:23,672 INFO L226 Difference]: Without dead ends: 443 [2022-03-20 22:24:23,673 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=9027, Invalid=11565, Unknown=0, NotChecked=0, Total=20592 [2022-03-20 22:24:23,674 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 198 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:24:23,674 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 444 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:24:23,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-03-20 22:24:23,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2022-03-20 22:24:23,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 341 states have (on average 1.1407624633431086) internal successors, (389), 341 states have internal predecessors, (389), 52 states have call successors, (52), 51 states have call predecessors, (52), 49 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-03-20 22:24:23,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 491 transitions. [2022-03-20 22:24:23,710 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 491 transitions. Word has length 437 [2022-03-20 22:24:23,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:24:23,711 INFO L478 AbstractCegarLoop]: Abstraction has 443 states and 491 transitions. [2022-03-20 22:24:23,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) [2022-03-20 22:24:23,739 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 491 transitions. [2022-03-20 22:24:23,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-03-20 22:24:23,741 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:24:23,741 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 47, 47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:24:23,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 22:24:23,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-20 22:24:23,943 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:24:23,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:24:23,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1123043804, now seen corresponding path program 93 times [2022-03-20 22:24:23,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:23,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1042291897] [2022-03-20 22:24:23,944 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:24:23,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1123043804, now seen corresponding path program 94 times [2022-03-20 22:24:23,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:24:23,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461968041] [2022-03-20 22:24:23,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:24:23,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:24:23,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:24:23,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882091870] [2022-03-20 22:24:23,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:24:23,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:23,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:24:23,953 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:24:23,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 22:24:24,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:24:24,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:24:24,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-20 22:24:24,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:24:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9921 backedges. 94 proven. 9823 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:24:25,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:24:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9921 backedges. 94 proven. 5499 refuted. 0 times theorem prover too weak. 4328 trivial. 0 not checked. [2022-03-20 22:24:26,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:24:26,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461968041] [2022-03-20 22:24:26,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:24:26,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882091870] [2022-03-20 22:24:26,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882091870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:24:26,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:24:26,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 100 [2022-03-20 22:24:26,892 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:24:26,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1042291897] [2022-03-20 22:24:26,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1042291897] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:24:26,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:24:26,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 22:24:26,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639462952] [2022-03-20 22:24:26,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:24:26,892 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 22:24:26,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:26,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 22:24:26,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4758, Invalid=5142, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 22:24:26,894 INFO L87 Difference]: Start difference. First operand 443 states and 491 transitions. Second operand has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) [2022-03-20 22:24:27,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:24:27,646 INFO L93 Difference]: Finished difference Result 457 states and 506 transitions. [2022-03-20 22:24:27,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-20 22:24:27,647 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) Word has length 446 [2022-03-20 22:24:27,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:24:27,648 INFO L225 Difference]: With dead ends: 457 [2022-03-20 22:24:27,649 INFO L226 Difference]: Without dead ends: 452 [2022-03-20 22:24:27,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 793 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9411, Invalid=12051, Unknown=0, NotChecked=0, Total=21462 [2022-03-20 22:24:27,651 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 209 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:24:27,651 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 464 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:24:27,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-03-20 22:24:27,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2022-03-20 22:24:27,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 348 states have (on average 1.1408045977011494) internal successors, (397), 348 states have internal predecessors, (397), 53 states have call successors, (53), 52 states have call predecessors, (53), 50 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 22:24:27,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 501 transitions. [2022-03-20 22:24:27,671 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 501 transitions. Word has length 446 [2022-03-20 22:24:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:24:27,671 INFO L478 AbstractCegarLoop]: Abstraction has 452 states and 501 transitions. [2022-03-20 22:24:27,672 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) [2022-03-20 22:24:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 501 transitions. [2022-03-20 22:24:27,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-03-20 22:24:27,674 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:24:27,674 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 48, 48, 48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:24:27,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-20 22:24:27,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-03-20 22:24:27,891 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:24:27,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:24:27,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2116619542, now seen corresponding path program 95 times [2022-03-20 22:24:27,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:27,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [196733399] [2022-03-20 22:24:27,892 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:24:27,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2116619542, now seen corresponding path program 96 times [2022-03-20 22:24:27,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:24:27,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905870391] [2022-03-20 22:24:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:24:27,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:24:27,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:24:27,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786589728] [2022-03-20 22:24:27,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:24:27,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:27,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:24:27,903 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:24:27,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 22:24:28,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2022-03-20 22:24:28,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:24:28,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-20 22:24:28,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:24:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10348 backedges. 96 proven. 10248 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:24:28,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:24:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 10348 backedges. 96 proven. 5736 refuted. 0 times theorem prover too weak. 4516 trivial. 0 not checked. [2022-03-20 22:24:30,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:24:30,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905870391] [2022-03-20 22:24:30,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:24:30,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786589728] [2022-03-20 22:24:30,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786589728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:24:30,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:24:30,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 102 [2022-03-20 22:24:30,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:24:30,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [196733399] [2022-03-20 22:24:30,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [196733399] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:24:30,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:24:30,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 22:24:30,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492298769] [2022-03-20 22:24:30,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:24:30,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 22:24:30,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:30,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 22:24:30,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4955, Invalid=5347, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 22:24:30,478 INFO L87 Difference]: Start difference. First operand 452 states and 501 transitions. Second operand has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (53), 51 states have call predecessors, (53), 49 states have return successors, (51), 49 states have call predecessors, (51), 50 states have call successors, (51) [2022-03-20 22:24:31,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:24:31,196 INFO L93 Difference]: Finished difference Result 466 states and 516 transitions. [2022-03-20 22:24:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-20 22:24:31,196 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (53), 51 states have call predecessors, (53), 49 states have return successors, (51), 49 states have call predecessors, (51), 50 states have call successors, (51) Word has length 455 [2022-03-20 22:24:31,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:24:31,198 INFO L225 Difference]: With dead ends: 466 [2022-03-20 22:24:31,198 INFO L226 Difference]: Without dead ends: 461 [2022-03-20 22:24:31,199 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 809 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=9803, Invalid=12547, Unknown=0, NotChecked=0, Total=22350 [2022-03-20 22:24:31,199 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 134 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 22:24:31,199 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 490 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 22:24:31,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-03-20 22:24:31,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 461. [2022-03-20 22:24:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 355 states have (on average 1.1408450704225352) internal successors, (405), 355 states have internal predecessors, (405), 54 states have call successors, (54), 53 states have call predecessors, (54), 51 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-03-20 22:24:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 511 transitions. [2022-03-20 22:24:31,219 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 511 transitions. Word has length 455 [2022-03-20 22:24:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:24:31,219 INFO L478 AbstractCegarLoop]: Abstraction has 461 states and 511 transitions. [2022-03-20 22:24:31,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 6.6923076923076925) internal successors, (348), 51 states have internal predecessors, (348), 51 states have call successors, (53), 51 states have call predecessors, (53), 49 states have return successors, (51), 49 states have call predecessors, (51), 50 states have call successors, (51) [2022-03-20 22:24:31,220 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 511 transitions. [2022-03-20 22:24:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2022-03-20 22:24:31,222 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:24:31,222 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 49, 49, 49, 49, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:24:31,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-20 22:24:31,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:31,440 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:24:31,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:24:31,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1413526756, now seen corresponding path program 97 times [2022-03-20 22:24:31,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:31,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1668375567] [2022-03-20 22:24:31,441 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:24:31,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1413526756, now seen corresponding path program 98 times [2022-03-20 22:24:31,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:24:31,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86830729] [2022-03-20 22:24:31,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:24:31,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:24:31,448 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:24:31,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40376047] [2022-03-20 22:24:31,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:24:31,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:31,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:24:31,449 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:24:31,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 22:24:31,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:24:31,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:24:31,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 103 conjunts are in the unsatisfiable core [2022-03-20 22:24:31,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:24:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10784 backedges. 98 proven. 10682 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:24:32,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:24:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10784 backedges. 98 proven. 5978 refuted. 0 times theorem prover too weak. 4708 trivial. 0 not checked. [2022-03-20 22:24:34,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:24:34,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86830729] [2022-03-20 22:24:34,109 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:24:34,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40376047] [2022-03-20 22:24:34,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40376047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:24:34,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:24:34,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 104 [2022-03-20 22:24:34,109 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:24:34,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1668375567] [2022-03-20 22:24:34,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1668375567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:24:34,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:24:34,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 22:24:34,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416188834] [2022-03-20 22:24:34,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:24:34,110 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 22:24:34,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:34,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 22:24:34,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:24:34,111 INFO L87 Difference]: Start difference. First operand 461 states and 511 transitions. Second operand has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (54), 52 states have call predecessors, (54), 50 states have return successors, (52), 50 states have call predecessors, (52), 51 states have call successors, (52) [2022-03-20 22:24:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:24:35,175 INFO L93 Difference]: Finished difference Result 475 states and 526 transitions. [2022-03-20 22:24:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-20 22:24:35,177 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (54), 52 states have call predecessors, (54), 50 states have return successors, (52), 50 states have call predecessors, (52), 51 states have call successors, (52) Word has length 464 [2022-03-20 22:24:35,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:24:35,179 INFO L225 Difference]: With dead ends: 475 [2022-03-20 22:24:35,179 INFO L226 Difference]: Without dead ends: 470 [2022-03-20 22:24:35,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 825 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=10203, Invalid=13053, Unknown=0, NotChecked=0, Total=23256 [2022-03-20 22:24:35,181 INFO L913 BasicCegarLoop]: 75 mSDtfsCounter, 146 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:24:35,181 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 492 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:24:35,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-03-20 22:24:35,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2022-03-20 22:24:35,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 362 states have (on average 1.1408839779005524) internal successors, (413), 362 states have internal predecessors, (413), 55 states have call successors, (55), 54 states have call predecessors, (55), 52 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-20 22:24:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 521 transitions. [2022-03-20 22:24:35,217 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 521 transitions. Word has length 464 [2022-03-20 22:24:35,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:24:35,218 INFO L478 AbstractCegarLoop]: Abstraction has 470 states and 521 transitions. [2022-03-20 22:24:35,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 6.69811320754717) internal successors, (355), 52 states have internal predecessors, (355), 52 states have call successors, (54), 52 states have call predecessors, (54), 50 states have return successors, (52), 50 states have call predecessors, (52), 51 states have call successors, (52) [2022-03-20 22:24:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 521 transitions. [2022-03-20 22:24:35,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2022-03-20 22:24:35,221 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:24:35,221 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 50, 50, 50, 50, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:24:35,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-20 22:24:35,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-20 22:24:35,438 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:24:35,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:24:35,439 INFO L85 PathProgramCache]: Analyzing trace with hash -368610346, now seen corresponding path program 99 times [2022-03-20 22:24:35,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:35,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1082475079] [2022-03-20 22:24:35,439 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:24:35,439 INFO L85 PathProgramCache]: Analyzing trace with hash -368610346, now seen corresponding path program 100 times [2022-03-20 22:24:35,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:24:35,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139261514] [2022-03-20 22:24:35,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:24:35,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:24:35,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:24:35,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769474474] [2022-03-20 22:24:35,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:24:35,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:35,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:24:35,448 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:24:35,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 22:24:35,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:24:35,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:24:35,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 105 conjunts are in the unsatisfiable core [2022-03-20 22:24:35,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:24:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11229 backedges. 100 proven. 11125 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:24:36,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:24:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11229 backedges. 100 proven. 6225 refuted. 0 times theorem prover too weak. 4904 trivial. 0 not checked. [2022-03-20 22:24:39,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:24:39,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139261514] [2022-03-20 22:24:39,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:24:39,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769474474] [2022-03-20 22:24:39,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769474474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:24:39,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:24:39,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 104 [2022-03-20 22:24:39,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:24:39,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1082475079] [2022-03-20 22:24:39,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1082475079] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:24:39,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:24:39,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-20 22:24:39,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839516409] [2022-03-20 22:24:39,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:24:39,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 22:24:39,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:39,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 22:24:39,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:24:39,252 INFO L87 Difference]: Start difference. First operand 470 states and 521 transitions. Second operand has 54 states, 54 states have (on average 6.703703703703703) internal successors, (362), 53 states have internal predecessors, (362), 53 states have call successors, (55), 53 states have call predecessors, (55), 51 states have return successors, (53), 51 states have call predecessors, (53), 52 states have call successors, (53) [2022-03-20 22:24:40,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:24:40,458 INFO L93 Difference]: Finished difference Result 484 states and 536 transitions. [2022-03-20 22:24:40,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-20 22:24:40,459 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 6.703703703703703) internal successors, (362), 53 states have internal predecessors, (362), 53 states have call successors, (55), 53 states have call predecessors, (55), 51 states have return successors, (53), 51 states have call predecessors, (53), 52 states have call successors, (53) Word has length 473 [2022-03-20 22:24:40,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:24:40,460 INFO L225 Difference]: With dead ends: 484 [2022-03-20 22:24:40,460 INFO L226 Difference]: Without dead ends: 479 [2022-03-20 22:24:40,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 842 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10306, Invalid=13256, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 22:24:40,462 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 194 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:24:40,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 482 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:24:40,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-03-20 22:24:40,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2022-03-20 22:24:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 369 states have (on average 1.1409214092140922) internal successors, (421), 369 states have internal predecessors, (421), 56 states have call successors, (56), 55 states have call predecessors, (56), 53 states have return successors, (54), 54 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-20 22:24:40,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 531 transitions. [2022-03-20 22:24:40,484 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 531 transitions. Word has length 473 [2022-03-20 22:24:40,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:24:40,484 INFO L478 AbstractCegarLoop]: Abstraction has 479 states and 531 transitions. [2022-03-20 22:24:40,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 6.703703703703703) internal successors, (362), 53 states have internal predecessors, (362), 53 states have call successors, (55), 53 states have call predecessors, (55), 51 states have return successors, (53), 51 states have call predecessors, (53), 52 states have call successors, (53) [2022-03-20 22:24:40,484 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 531 transitions. [2022-03-20 22:24:40,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2022-03-20 22:24:40,486 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:24:40,486 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 51, 51, 51, 51, 51, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:24:40,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-20 22:24:40,704 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:40,704 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:24:40,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:24:40,704 INFO L85 PathProgramCache]: Analyzing trace with hash 868777052, now seen corresponding path program 101 times [2022-03-20 22:24:40,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:40,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [396802446] [2022-03-20 22:24:40,705 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:24:40,705 INFO L85 PathProgramCache]: Analyzing trace with hash 868777052, now seen corresponding path program 102 times [2022-03-20 22:24:40,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:24:40,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481025058] [2022-03-20 22:24:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:24:40,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:24:40,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:24:40,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126006076] [2022-03-20 22:24:40,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:24:40,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:40,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:24:40,714 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:24:40,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 22:24:41,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2022-03-20 22:24:41,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:24:41,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 107 conjunts are in the unsatisfiable core [2022-03-20 22:24:41,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:24:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11683 backedges. 102 proven. 11577 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:24:42,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:24:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11683 backedges. 102 proven. 6477 refuted. 0 times theorem prover too weak. 5104 trivial. 0 not checked. [2022-03-20 22:24:44,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:24:44,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481025058] [2022-03-20 22:24:44,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:24:44,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126006076] [2022-03-20 22:24:44,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126006076] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:24:44,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:24:44,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 104 [2022-03-20 22:24:44,849 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:24:44,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [396802446] [2022-03-20 22:24:44,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [396802446] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:24:44,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:24:44,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 22:24:44,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197210182] [2022-03-20 22:24:44,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:24:44,850 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 22:24:44,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:44,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 22:24:44,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:24:44,851 INFO L87 Difference]: Start difference. First operand 479 states and 531 transitions. Second operand has 55 states, 55 states have (on average 6.709090909090909) internal successors, (369), 54 states have internal predecessors, (369), 54 states have call successors, (56), 54 states have call predecessors, (56), 52 states have return successors, (54), 52 states have call predecessors, (54), 53 states have call successors, (54) [2022-03-20 22:24:46,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:24:46,066 INFO L93 Difference]: Finished difference Result 493 states and 546 transitions. [2022-03-20 22:24:46,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-20 22:24:46,066 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 6.709090909090909) internal successors, (369), 54 states have internal predecessors, (369), 54 states have call successors, (56), 54 states have call predecessors, (56), 52 states have return successors, (54), 52 states have call predecessors, (54), 53 states have call successors, (54) Word has length 482 [2022-03-20 22:24:46,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:24:46,068 INFO L225 Difference]: With dead ends: 493 [2022-03-20 22:24:46,068 INFO L226 Difference]: Without dead ends: 488 [2022-03-20 22:24:46,069 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1014 GetRequests, 860 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=10409, Invalid=13461, Unknown=0, NotChecked=0, Total=23870 [2022-03-20 22:24:46,070 INFO L913 BasicCegarLoop]: 77 mSDtfsCounter, 151 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:24:46,070 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 508 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:24:46,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-03-20 22:24:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 488. [2022-03-20 22:24:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 376 states have (on average 1.1409574468085106) internal successors, (429), 376 states have internal predecessors, (429), 57 states have call successors, (57), 56 states have call predecessors, (57), 54 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-20 22:24:46,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 541 transitions. [2022-03-20 22:24:46,094 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 541 transitions. Word has length 482 [2022-03-20 22:24:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:24:46,094 INFO L478 AbstractCegarLoop]: Abstraction has 488 states and 541 transitions. [2022-03-20 22:24:46,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 6.709090909090909) internal successors, (369), 54 states have internal predecessors, (369), 54 states have call successors, (56), 54 states have call predecessors, (56), 52 states have return successors, (54), 52 states have call predecessors, (54), 53 states have call successors, (54) [2022-03-20 22:24:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 541 transitions. [2022-03-20 22:24:46,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2022-03-20 22:24:46,096 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:24:46,097 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 52, 52, 52, 52, 52, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:24:46,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-20 22:24:46,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:46,315 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:24:46,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:24:46,315 INFO L85 PathProgramCache]: Analyzing trace with hash 2099358358, now seen corresponding path program 103 times [2022-03-20 22:24:46,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:46,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [538811269] [2022-03-20 22:24:46,316 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:24:46,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2099358358, now seen corresponding path program 104 times [2022-03-20 22:24:46,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:24:46,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590603991] [2022-03-20 22:24:46,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:24:46,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:24:46,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:24:46,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104059894] [2022-03-20 22:24:46,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:24:46,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:46,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:24:46,327 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:24:46,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 22:24:46,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:24:46,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:24:46,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-20 22:24:46,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:24:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12146 backedges. 104 proven. 12038 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:24:47,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:24:49,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12146 backedges. 104 proven. 6734 refuted. 0 times theorem prover too weak. 5308 trivial. 0 not checked. [2022-03-20 22:24:49,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:24:49,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590603991] [2022-03-20 22:24:49,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:24:49,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104059894] [2022-03-20 22:24:49,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104059894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:24:49,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:24:49,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 104 [2022-03-20 22:24:49,935 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:24:49,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [538811269] [2022-03-20 22:24:49,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [538811269] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:24:49,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:24:49,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-20 22:24:49,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005973961] [2022-03-20 22:24:49,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:24:49,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 22:24:49,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:49,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 22:24:49,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:24:49,938 INFO L87 Difference]: Start difference. First operand 488 states and 541 transitions. Second operand has 56 states, 56 states have (on average 6.714285714285714) internal successors, (376), 55 states have internal predecessors, (376), 55 states have call successors, (57), 55 states have call predecessors, (57), 53 states have return successors, (55), 53 states have call predecessors, (55), 54 states have call successors, (55) [2022-03-20 22:24:50,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:24:50,891 INFO L93 Difference]: Finished difference Result 502 states and 556 transitions. [2022-03-20 22:24:50,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-20 22:24:50,891 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 6.714285714285714) internal successors, (376), 55 states have internal predecessors, (376), 55 states have call successors, (57), 55 states have call predecessors, (57), 53 states have return successors, (55), 53 states have call predecessors, (55), 54 states have call successors, (55) Word has length 491 [2022-03-20 22:24:50,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:24:50,893 INFO L225 Difference]: With dead ends: 502 [2022-03-20 22:24:50,893 INFO L226 Difference]: Without dead ends: 497 [2022-03-20 22:24:50,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1033 GetRequests, 878 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=10512, Invalid=13668, Unknown=0, NotChecked=0, Total=24180 [2022-03-20 22:24:50,895 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 184 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:24:50,895 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 510 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:24:50,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-03-20 22:24:50,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2022-03-20 22:24:50,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 383 states have (on average 1.1409921671018277) internal successors, (437), 383 states have internal predecessors, (437), 58 states have call successors, (58), 57 states have call predecessors, (58), 55 states have return successors, (56), 56 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-20 22:24:50,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 551 transitions. [2022-03-20 22:24:50,920 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 551 transitions. Word has length 491 [2022-03-20 22:24:50,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:24:50,920 INFO L478 AbstractCegarLoop]: Abstraction has 497 states and 551 transitions. [2022-03-20 22:24:50,920 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 6.714285714285714) internal successors, (376), 55 states have internal predecessors, (376), 55 states have call successors, (57), 55 states have call predecessors, (57), 53 states have return successors, (55), 53 states have call predecessors, (55), 54 states have call successors, (55) [2022-03-20 22:24:50,920 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 551 transitions. [2022-03-20 22:24:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2022-03-20 22:24:50,922 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:24:50,923 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 53, 53, 53, 53, 53, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:24:50,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-20 22:24:51,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:51,141 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:24:51,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:24:51,142 INFO L85 PathProgramCache]: Analyzing trace with hash 853532060, now seen corresponding path program 105 times [2022-03-20 22:24:51,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:51,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1504525418] [2022-03-20 22:24:51,142 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:24:51,142 INFO L85 PathProgramCache]: Analyzing trace with hash 853532060, now seen corresponding path program 106 times [2022-03-20 22:24:51,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:24:51,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006197460] [2022-03-20 22:24:51,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:24:51,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:24:51,152 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:24:51,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999237155] [2022-03-20 22:24:51,153 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:24:51,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:51,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:24:51,154 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:24:51,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 22:24:51,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:24:51,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:24:51,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 111 conjunts are in the unsatisfiable core [2022-03-20 22:24:51,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:24:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12618 backedges. 106 proven. 12508 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:24:52,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:24:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12618 backedges. 106 proven. 6996 refuted. 0 times theorem prover too weak. 5516 trivial. 0 not checked. [2022-03-20 22:24:53,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:24:53,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006197460] [2022-03-20 22:24:53,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:24:53,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999237155] [2022-03-20 22:24:53,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999237155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:24:53,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:24:53,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 104 [2022-03-20 22:24:53,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:24:53,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1504525418] [2022-03-20 22:24:53,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1504525418] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:24:53,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:24:53,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 22:24:53,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960198250] [2022-03-20 22:24:53,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:24:53,834 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 22:24:53,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:53,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 22:24:53,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:24:53,836 INFO L87 Difference]: Start difference. First operand 497 states and 551 transitions. Second operand has 57 states, 57 states have (on average 6.719298245614035) internal successors, (383), 56 states have internal predecessors, (383), 56 states have call successors, (58), 56 states have call predecessors, (58), 54 states have return successors, (56), 54 states have call predecessors, (56), 55 states have call successors, (56) [2022-03-20 22:24:54,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:24:54,795 INFO L93 Difference]: Finished difference Result 511 states and 566 transitions. [2022-03-20 22:24:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-20 22:24:54,796 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 6.719298245614035) internal successors, (383), 56 states have internal predecessors, (383), 56 states have call successors, (58), 56 states have call predecessors, (58), 54 states have return successors, (56), 54 states have call predecessors, (56), 55 states have call successors, (56) Word has length 500 [2022-03-20 22:24:54,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:24:54,798 INFO L225 Difference]: With dead ends: 511 [2022-03-20 22:24:54,798 INFO L226 Difference]: Without dead ends: 506 [2022-03-20 22:24:54,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1052 GetRequests, 896 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=10615, Invalid=13877, Unknown=0, NotChecked=0, Total=24492 [2022-03-20 22:24:54,819 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 207 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:24:54,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 524 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:24:54,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-03-20 22:24:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2022-03-20 22:24:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 390 states have (on average 1.141025641025641) internal successors, (445), 390 states have internal predecessors, (445), 59 states have call successors, (59), 58 states have call predecessors, (59), 56 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2022-03-20 22:24:54,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 561 transitions. [2022-03-20 22:24:54,843 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 561 transitions. Word has length 500 [2022-03-20 22:24:54,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:24:54,843 INFO L478 AbstractCegarLoop]: Abstraction has 506 states and 561 transitions. [2022-03-20 22:24:54,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 6.719298245614035) internal successors, (383), 56 states have internal predecessors, (383), 56 states have call successors, (58), 56 states have call predecessors, (58), 54 states have return successors, (56), 54 states have call predecessors, (56), 55 states have call successors, (56) [2022-03-20 22:24:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 561 transitions. [2022-03-20 22:24:54,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2022-03-20 22:24:54,846 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:24:54,846 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 54, 54, 54, 54, 54, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:24:54,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-20 22:24:55,059 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:55,059 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:24:55,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:24:55,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1847832918, now seen corresponding path program 107 times [2022-03-20 22:24:55,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:55,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [807956634] [2022-03-20 22:24:55,060 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:24:55,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1847832918, now seen corresponding path program 108 times [2022-03-20 22:24:55,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:24:55,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117746267] [2022-03-20 22:24:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:24:55,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:24:55,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:24:55,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577169224] [2022-03-20 22:24:55,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:24:55,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:24:55,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:24:55,071 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:24:55,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 22:24:55,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-03-20 22:24:55,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:24:55,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1335 conjuncts, 113 conjunts are in the unsatisfiable core [2022-03-20 22:24:55,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:24:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 13099 backedges. 108 proven. 12987 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:24:57,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:24:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 13099 backedges. 108 proven. 7263 refuted. 0 times theorem prover too weak. 5728 trivial. 0 not checked. [2022-03-20 22:24:59,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:24:59,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117746267] [2022-03-20 22:24:59,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:24:59,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577169224] [2022-03-20 22:24:59,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577169224] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:24:59,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:24:59,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 104 [2022-03-20 22:24:59,160 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:24:59,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [807956634] [2022-03-20 22:24:59,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [807956634] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:24:59,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:24:59,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-20 22:24:59,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855831600] [2022-03-20 22:24:59,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:24:59,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 22:24:59,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:24:59,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 22:24:59,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:24:59,163 INFO L87 Difference]: Start difference. First operand 506 states and 561 transitions. Second operand has 58 states, 58 states have (on average 6.724137931034483) internal successors, (390), 57 states have internal predecessors, (390), 57 states have call successors, (59), 57 states have call predecessors, (59), 55 states have return successors, (57), 55 states have call predecessors, (57), 56 states have call successors, (57) [2022-03-20 22:25:00,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:25:00,442 INFO L93 Difference]: Finished difference Result 520 states and 576 transitions. [2022-03-20 22:25:00,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-03-20 22:25:00,443 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 6.724137931034483) internal successors, (390), 57 states have internal predecessors, (390), 57 states have call successors, (59), 57 states have call predecessors, (59), 55 states have return successors, (57), 55 states have call predecessors, (57), 56 states have call successors, (57) Word has length 509 [2022-03-20 22:25:00,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:25:00,444 INFO L225 Difference]: With dead ends: 520 [2022-03-20 22:25:00,444 INFO L226 Difference]: Without dead ends: 515 [2022-03-20 22:25:00,446 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1071 GetRequests, 914 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=10718, Invalid=14088, Unknown=0, NotChecked=0, Total=24806 [2022-03-20 22:25:00,446 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 261 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:25:00,446 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 502 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:25:00,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-03-20 22:25:00,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 515. [2022-03-20 22:25:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 397 states have (on average 1.141057934508816) internal successors, (453), 397 states have internal predecessors, (453), 60 states have call successors, (60), 59 states have call predecessors, (60), 57 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-03-20 22:25:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 571 transitions. [2022-03-20 22:25:00,469 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 571 transitions. Word has length 509 [2022-03-20 22:25:00,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:25:00,470 INFO L478 AbstractCegarLoop]: Abstraction has 515 states and 571 transitions. [2022-03-20 22:25:00,470 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 6.724137931034483) internal successors, (390), 57 states have internal predecessors, (390), 57 states have call successors, (59), 57 states have call predecessors, (59), 55 states have return successors, (57), 55 states have call predecessors, (57), 56 states have call successors, (57) [2022-03-20 22:25:00,470 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 571 transitions. [2022-03-20 22:25:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2022-03-20 22:25:00,472 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:25:00,472 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 55, 55, 55, 55, 55, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:25:00,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-20 22:25:00,689 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-20 22:25:00,689 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:25:00,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:25:00,689 INFO L85 PathProgramCache]: Analyzing trace with hash 869887708, now seen corresponding path program 109 times [2022-03-20 22:25:00,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:00,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1575998222] [2022-03-20 22:25:00,690 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:25:00,690 INFO L85 PathProgramCache]: Analyzing trace with hash 869887708, now seen corresponding path program 110 times [2022-03-20 22:25:00,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:25:00,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68363962] [2022-03-20 22:25:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:25:00,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:25:00,698 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:25:00,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671530253] [2022-03-20 22:25:00,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:25:00,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:00,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:25:00,699 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:25:00,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 22:25:00,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:25:00,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:25:00,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 115 conjunts are in the unsatisfiable core [2022-03-20 22:25:00,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:25:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13589 backedges. 110 proven. 13475 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:25:02,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:25:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 13589 backedges. 110 proven. 7535 refuted. 0 times theorem prover too weak. 5944 trivial. 0 not checked. [2022-03-20 22:25:04,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:25:04,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68363962] [2022-03-20 22:25:04,303 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:25:04,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671530253] [2022-03-20 22:25:04,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671530253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:25:04,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:25:04,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 104 [2022-03-20 22:25:04,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:25:04,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1575998222] [2022-03-20 22:25:04,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1575998222] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:25:04,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:25:04,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 22:25:04,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293922035] [2022-03-20 22:25:04,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:25:04,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 22:25:04,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:04,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 22:25:04,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:25:04,305 INFO L87 Difference]: Start difference. First operand 515 states and 571 transitions. Second operand has 59 states, 59 states have (on average 6.728813559322034) internal successors, (397), 58 states have internal predecessors, (397), 58 states have call successors, (60), 58 states have call predecessors, (60), 56 states have return successors, (58), 56 states have call predecessors, (58), 57 states have call successors, (58) [2022-03-20 22:25:05,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:25:05,270 INFO L93 Difference]: Finished difference Result 529 states and 586 transitions. [2022-03-20 22:25:05,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-20 22:25:05,270 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 6.728813559322034) internal successors, (397), 58 states have internal predecessors, (397), 58 states have call successors, (60), 58 states have call predecessors, (60), 56 states have return successors, (58), 56 states have call predecessors, (58), 57 states have call successors, (58) Word has length 518 [2022-03-20 22:25:05,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:25:05,272 INFO L225 Difference]: With dead ends: 529 [2022-03-20 22:25:05,272 INFO L226 Difference]: Without dead ends: 524 [2022-03-20 22:25:05,275 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1090 GetRequests, 932 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=10821, Invalid=14301, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 22:25:05,275 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 216 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:25:05,275 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 516 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:25:05,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-03-20 22:25:05,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 524. [2022-03-20 22:25:05,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 404 states have (on average 1.141089108910891) internal successors, (461), 404 states have internal predecessors, (461), 61 states have call successors, (61), 60 states have call predecessors, (61), 58 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-03-20 22:25:05,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 581 transitions. [2022-03-20 22:25:05,310 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 581 transitions. Word has length 518 [2022-03-20 22:25:05,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:25:05,310 INFO L478 AbstractCegarLoop]: Abstraction has 524 states and 581 transitions. [2022-03-20 22:25:05,310 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 6.728813559322034) internal successors, (397), 58 states have internal predecessors, (397), 58 states have call successors, (60), 58 states have call predecessors, (60), 56 states have return successors, (58), 56 states have call predecessors, (58), 57 states have call successors, (58) [2022-03-20 22:25:05,310 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 581 transitions. [2022-03-20 22:25:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2022-03-20 22:25:05,313 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:25:05,314 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 56, 56, 56, 56, 56, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:25:05,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-20 22:25:05,521 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-20 22:25:05,522 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:25:05,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:25:05,522 INFO L85 PathProgramCache]: Analyzing trace with hash 549029910, now seen corresponding path program 111 times [2022-03-20 22:25:05,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:05,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [200460075] [2022-03-20 22:25:05,522 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:25:05,522 INFO L85 PathProgramCache]: Analyzing trace with hash 549029910, now seen corresponding path program 112 times [2022-03-20 22:25:05,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:25:05,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409045707] [2022-03-20 22:25:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:25:05,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:25:05,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:25:05,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2089007933] [2022-03-20 22:25:05,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:25:05,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:05,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:25:05,532 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:25:05,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 22:25:05,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:25:05,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:25:05,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 117 conjunts are in the unsatisfiable core [2022-03-20 22:25:05,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:25:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 14088 backedges. 112 proven. 13972 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:25:06,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:25:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 14088 backedges. 112 proven. 7812 refuted. 0 times theorem prover too weak. 6164 trivial. 0 not checked. [2022-03-20 22:25:08,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:25:08,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409045707] [2022-03-20 22:25:08,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:25:08,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089007933] [2022-03-20 22:25:08,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089007933] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:25:08,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:25:08,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 104 [2022-03-20 22:25:08,700 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:25:08,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [200460075] [2022-03-20 22:25:08,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [200460075] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:25:08,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:25:08,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-20 22:25:08,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930468689] [2022-03-20 22:25:08,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:25:08,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 22:25:08,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:08,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 22:25:08,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:25:08,703 INFO L87 Difference]: Start difference. First operand 524 states and 581 transitions. Second operand has 60 states, 60 states have (on average 6.733333333333333) internal successors, (404), 59 states have internal predecessors, (404), 59 states have call successors, (61), 59 states have call predecessors, (61), 57 states have return successors, (59), 57 states have call predecessors, (59), 58 states have call successors, (59) [2022-03-20 22:25:09,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:25:09,977 INFO L93 Difference]: Finished difference Result 538 states and 596 transitions. [2022-03-20 22:25:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-20 22:25:09,977 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 6.733333333333333) internal successors, (404), 59 states have internal predecessors, (404), 59 states have call successors, (61), 59 states have call predecessors, (61), 57 states have return successors, (59), 57 states have call predecessors, (59), 58 states have call successors, (59) Word has length 527 [2022-03-20 22:25:09,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:25:09,979 INFO L225 Difference]: With dead ends: 538 [2022-03-20 22:25:09,979 INFO L226 Difference]: Without dead ends: 533 [2022-03-20 22:25:09,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1109 GetRequests, 950 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=10924, Invalid=14516, Unknown=0, NotChecked=0, Total=25440 [2022-03-20 22:25:09,981 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 262 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:25:09,981 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 518 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:25:09,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-03-20 22:25:10,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 533. [2022-03-20 22:25:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 411 states have (on average 1.1411192214111923) internal successors, (469), 411 states have internal predecessors, (469), 62 states have call successors, (62), 61 states have call predecessors, (62), 59 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2022-03-20 22:25:10,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 591 transitions. [2022-03-20 22:25:10,005 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 591 transitions. Word has length 527 [2022-03-20 22:25:10,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:25:10,005 INFO L478 AbstractCegarLoop]: Abstraction has 533 states and 591 transitions. [2022-03-20 22:25:10,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 6.733333333333333) internal successors, (404), 59 states have internal predecessors, (404), 59 states have call successors, (61), 59 states have call predecessors, (61), 57 states have return successors, (59), 57 states have call predecessors, (59), 58 states have call successors, (59) [2022-03-20 22:25:10,006 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 591 transitions. [2022-03-20 22:25:10,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2022-03-20 22:25:10,008 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:25:10,008 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 57, 57, 57, 57, 57, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:25:10,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-20 22:25:10,227 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-20 22:25:10,227 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:25:10,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:25:10,227 INFO L85 PathProgramCache]: Analyzing trace with hash 881405980, now seen corresponding path program 113 times [2022-03-20 22:25:10,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:10,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [436504910] [2022-03-20 22:25:10,228 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:25:10,228 INFO L85 PathProgramCache]: Analyzing trace with hash 881405980, now seen corresponding path program 114 times [2022-03-20 22:25:10,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:25:10,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668499192] [2022-03-20 22:25:10,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:25:10,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:25:10,236 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:25:10,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268624580] [2022-03-20 22:25:10,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:25:10,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:10,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:25:10,238 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:25:10,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 22:25:10,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2022-03-20 22:25:10,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:25:10,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 119 conjunts are in the unsatisfiable core [2022-03-20 22:25:10,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:25:11,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14596 backedges. 114 proven. 14478 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:25:11,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:25:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14596 backedges. 114 proven. 8094 refuted. 0 times theorem prover too weak. 6388 trivial. 0 not checked. [2022-03-20 22:25:14,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:25:14,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668499192] [2022-03-20 22:25:14,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:25:14,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268624580] [2022-03-20 22:25:14,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268624580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:25:14,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:25:14,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 104 [2022-03-20 22:25:14,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:25:14,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [436504910] [2022-03-20 22:25:14,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [436504910] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:25:14,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:25:14,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 22:25:14,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229280466] [2022-03-20 22:25:14,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:25:14,375 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 22:25:14,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:14,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 22:25:14,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:25:14,376 INFO L87 Difference]: Start difference. First operand 533 states and 591 transitions. Second operand has 61 states, 61 states have (on average 6.737704918032787) internal successors, (411), 60 states have internal predecessors, (411), 60 states have call successors, (62), 60 states have call predecessors, (62), 58 states have return successors, (60), 58 states have call predecessors, (60), 59 states have call successors, (60) [2022-03-20 22:25:15,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:25:15,606 INFO L93 Difference]: Finished difference Result 547 states and 606 transitions. [2022-03-20 22:25:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-20 22:25:15,607 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 6.737704918032787) internal successors, (411), 60 states have internal predecessors, (411), 60 states have call successors, (62), 60 states have call predecessors, (62), 58 states have return successors, (60), 58 states have call predecessors, (60), 59 states have call successors, (60) Word has length 536 [2022-03-20 22:25:15,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:25:15,608 INFO L225 Difference]: With dead ends: 547 [2022-03-20 22:25:15,608 INFO L226 Difference]: Without dead ends: 542 [2022-03-20 22:25:15,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1128 GetRequests, 968 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=11027, Invalid=14733, Unknown=0, NotChecked=0, Total=25760 [2022-03-20 22:25:15,610 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 232 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:25:15,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 550 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:25:15,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-03-20 22:25:15,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 542. [2022-03-20 22:25:15,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 418 states have (on average 1.1411483253588517) internal successors, (477), 418 states have internal predecessors, (477), 63 states have call successors, (63), 62 states have call predecessors, (63), 60 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-20 22:25:15,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 601 transitions. [2022-03-20 22:25:15,635 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 601 transitions. Word has length 536 [2022-03-20 22:25:15,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:25:15,635 INFO L478 AbstractCegarLoop]: Abstraction has 542 states and 601 transitions. [2022-03-20 22:25:15,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 6.737704918032787) internal successors, (411), 60 states have internal predecessors, (411), 60 states have call successors, (62), 60 states have call predecessors, (62), 58 states have return successors, (60), 58 states have call predecessors, (60), 59 states have call successors, (60) [2022-03-20 22:25:15,635 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 601 transitions. [2022-03-20 22:25:15,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2022-03-20 22:25:15,638 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:25:15,638 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 58, 58, 58, 58, 58, 58, 58, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:25:15,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-20 22:25:15,845 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:15,845 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:25:15,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:25:15,845 INFO L85 PathProgramCache]: Analyzing trace with hash -443601194, now seen corresponding path program 115 times [2022-03-20 22:25:15,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:15,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1481744235] [2022-03-20 22:25:15,846 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:25:15,846 INFO L85 PathProgramCache]: Analyzing trace with hash -443601194, now seen corresponding path program 116 times [2022-03-20 22:25:15,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:25:15,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991991183] [2022-03-20 22:25:15,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:25:15,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:25:15,854 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:25:15,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374019025] [2022-03-20 22:25:15,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:25:15,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:15,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:25:15,868 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:25:15,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 22:25:16,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:25:16,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:25:16,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 121 conjunts are in the unsatisfiable core [2022-03-20 22:25:16,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:25:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 15113 backedges. 116 proven. 14993 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:25:17,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:25:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 15113 backedges. 116 proven. 8381 refuted. 0 times theorem prover too weak. 6616 trivial. 0 not checked. [2022-03-20 22:25:19,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:25:19,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991991183] [2022-03-20 22:25:19,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:25:19,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374019025] [2022-03-20 22:25:19,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374019025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:25:19,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:25:19,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 104 [2022-03-20 22:25:19,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:25:19,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1481744235] [2022-03-20 22:25:19,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1481744235] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:25:19,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:25:19,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-20 22:25:19,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829169030] [2022-03-20 22:25:19,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:25:19,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 22:25:19,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:19,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 22:25:19,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:25:19,302 INFO L87 Difference]: Start difference. First operand 542 states and 601 transitions. Second operand has 62 states, 62 states have (on average 6.741935483870968) internal successors, (418), 61 states have internal predecessors, (418), 61 states have call successors, (63), 61 states have call predecessors, (63), 59 states have return successors, (61), 59 states have call predecessors, (61), 60 states have call successors, (61) [2022-03-20 22:25:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:25:20,603 INFO L93 Difference]: Finished difference Result 556 states and 616 transitions. [2022-03-20 22:25:20,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-03-20 22:25:20,604 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 6.741935483870968) internal successors, (418), 61 states have internal predecessors, (418), 61 states have call successors, (63), 61 states have call predecessors, (63), 59 states have return successors, (61), 59 states have call predecessors, (61), 60 states have call successors, (61) Word has length 545 [2022-03-20 22:25:20,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:25:20,605 INFO L225 Difference]: With dead ends: 556 [2022-03-20 22:25:20,605 INFO L226 Difference]: Without dead ends: 551 [2022-03-20 22:25:20,607 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1147 GetRequests, 986 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=11130, Invalid=14952, Unknown=0, NotChecked=0, Total=26082 [2022-03-20 22:25:20,607 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 264 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:25:20,608 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 546 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:25:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-03-20 22:25:20,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2022-03-20 22:25:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 425 states have (on average 1.1411764705882352) internal successors, (485), 425 states have internal predecessors, (485), 64 states have call successors, (64), 63 states have call predecessors, (64), 61 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-03-20 22:25:20,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 611 transitions. [2022-03-20 22:25:20,634 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 611 transitions. Word has length 545 [2022-03-20 22:25:20,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:25:20,634 INFO L478 AbstractCegarLoop]: Abstraction has 551 states and 611 transitions. [2022-03-20 22:25:20,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 6.741935483870968) internal successors, (418), 61 states have internal predecessors, (418), 61 states have call successors, (63), 61 states have call predecessors, (63), 59 states have return successors, (61), 59 states have call predecessors, (61), 60 states have call successors, (61) [2022-03-20 22:25:20,634 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 611 transitions. [2022-03-20 22:25:20,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2022-03-20 22:25:20,637 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:25:20,637 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 59, 59, 59, 59, 59, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:25:20,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-20 22:25:20,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:20,851 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:25:20,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:25:20,852 INFO L85 PathProgramCache]: Analyzing trace with hash -440196772, now seen corresponding path program 117 times [2022-03-20 22:25:20,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:20,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1938242676] [2022-03-20 22:25:20,852 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:25:20,852 INFO L85 PathProgramCache]: Analyzing trace with hash -440196772, now seen corresponding path program 118 times [2022-03-20 22:25:20,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:25:20,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347019684] [2022-03-20 22:25:20,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:25:20,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:25:20,861 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:25:20,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1780597463] [2022-03-20 22:25:20,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:25:20,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:20,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:25:20,865 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:25:20,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 22:25:21,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:25:21,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:25:21,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 123 conjunts are in the unsatisfiable core [2022-03-20 22:25:21,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:25:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 15639 backedges. 118 proven. 15517 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:25:22,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:25:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15639 backedges. 118 proven. 8673 refuted. 0 times theorem prover too weak. 6848 trivial. 0 not checked. [2022-03-20 22:25:23,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:25:23,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347019684] [2022-03-20 22:25:23,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:25:23,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780597463] [2022-03-20 22:25:23,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780597463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:25:23,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:25:23,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 104 [2022-03-20 22:25:23,676 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:25:23,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1938242676] [2022-03-20 22:25:23,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1938242676] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:25:23,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:25:23,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 22:25:23,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288894156] [2022-03-20 22:25:23,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:25:23,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 22:25:23,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:23,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 22:25:23,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:25:23,678 INFO L87 Difference]: Start difference. First operand 551 states and 611 transitions. Second operand has 63 states, 63 states have (on average 6.746031746031746) internal successors, (425), 62 states have internal predecessors, (425), 62 states have call successors, (64), 62 states have call predecessors, (64), 60 states have return successors, (62), 60 states have call predecessors, (62), 61 states have call successors, (62) [2022-03-20 22:25:25,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:25:25,117 INFO L93 Difference]: Finished difference Result 565 states and 626 transitions. [2022-03-20 22:25:25,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-03-20 22:25:25,117 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 6.746031746031746) internal successors, (425), 62 states have internal predecessors, (425), 62 states have call successors, (64), 62 states have call predecessors, (64), 60 states have return successors, (62), 60 states have call predecessors, (62), 61 states have call successors, (62) Word has length 554 [2022-03-20 22:25:25,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:25:25,119 INFO L225 Difference]: With dead ends: 565 [2022-03-20 22:25:25,119 INFO L226 Difference]: Without dead ends: 560 [2022-03-20 22:25:25,120 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1166 GetRequests, 1004 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=11233, Invalid=15173, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 22:25:25,120 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 265 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:25:25,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 560 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:25:25,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-03-20 22:25:25,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2022-03-20 22:25:25,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 432 states have (on average 1.1412037037037037) internal successors, (493), 432 states have internal predecessors, (493), 65 states have call successors, (65), 64 states have call predecessors, (65), 62 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2022-03-20 22:25:25,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 621 transitions. [2022-03-20 22:25:25,149 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 621 transitions. Word has length 554 [2022-03-20 22:25:25,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:25:25,149 INFO L478 AbstractCegarLoop]: Abstraction has 560 states and 621 transitions. [2022-03-20 22:25:25,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 6.746031746031746) internal successors, (425), 62 states have internal predecessors, (425), 62 states have call successors, (64), 62 states have call predecessors, (64), 60 states have return successors, (62), 60 states have call predecessors, (62), 61 states have call successors, (62) [2022-03-20 22:25:25,150 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 621 transitions. [2022-03-20 22:25:25,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2022-03-20 22:25:25,152 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:25:25,152 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 60, 60, 60, 60, 60, 60, 60, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:25:25,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-20 22:25:25,354 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:25,354 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:25:25,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:25:25,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1169119850, now seen corresponding path program 119 times [2022-03-20 22:25:25,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:25,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [184650848] [2022-03-20 22:25:25,355 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:25:25,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1169119850, now seen corresponding path program 120 times [2022-03-20 22:25:25,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:25:25,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192368849] [2022-03-20 22:25:25,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:25:25,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:25:25,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:25:25,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335012811] [2022-03-20 22:25:25,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:25:25,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:25,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:25:25,404 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:25:25,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 22:25:25,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2022-03-20 22:25:25,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:25:25,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1473 conjuncts, 125 conjunts are in the unsatisfiable core [2022-03-20 22:25:25,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:25:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16174 backedges. 120 proven. 16050 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:25:27,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:25:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16174 backedges. 120 proven. 8970 refuted. 0 times theorem prover too weak. 7084 trivial. 0 not checked. [2022-03-20 22:25:29,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:25:29,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192368849] [2022-03-20 22:25:29,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:25:29,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335012811] [2022-03-20 22:25:29,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335012811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:25:29,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:25:29,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 104 [2022-03-20 22:25:29,006 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:25:29,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [184650848] [2022-03-20 22:25:29,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [184650848] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:25:29,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:25:29,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-20 22:25:29,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657496789] [2022-03-20 22:25:29,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:25:29,007 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 22:25:29,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:29,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 22:25:29,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:25:29,008 INFO L87 Difference]: Start difference. First operand 560 states and 621 transitions. Second operand has 64 states, 64 states have (on average 6.75) internal successors, (432), 63 states have internal predecessors, (432), 63 states have call successors, (65), 63 states have call predecessors, (65), 61 states have return successors, (63), 61 states have call predecessors, (63), 62 states have call successors, (63) [2022-03-20 22:25:30,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:25:30,171 INFO L93 Difference]: Finished difference Result 574 states and 636 transitions. [2022-03-20 22:25:30,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-03-20 22:25:30,172 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 6.75) internal successors, (432), 63 states have internal predecessors, (432), 63 states have call successors, (65), 63 states have call predecessors, (65), 61 states have return successors, (63), 61 states have call predecessors, (63), 62 states have call successors, (63) Word has length 563 [2022-03-20 22:25:30,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:25:30,173 INFO L225 Difference]: With dead ends: 574 [2022-03-20 22:25:30,174 INFO L226 Difference]: Without dead ends: 569 [2022-03-20 22:25:30,175 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1185 GetRequests, 1022 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=11336, Invalid=15396, Unknown=0, NotChecked=0, Total=26732 [2022-03-20 22:25:30,175 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 264 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:25:30,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 550 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:25:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-03-20 22:25:30,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2022-03-20 22:25:30,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 439 states have (on average 1.14123006833713) internal successors, (501), 439 states have internal predecessors, (501), 66 states have call successors, (66), 65 states have call predecessors, (66), 63 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-03-20 22:25:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 631 transitions. [2022-03-20 22:25:30,225 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 631 transitions. Word has length 563 [2022-03-20 22:25:30,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:25:30,225 INFO L478 AbstractCegarLoop]: Abstraction has 569 states and 631 transitions. [2022-03-20 22:25:30,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 6.75) internal successors, (432), 63 states have internal predecessors, (432), 63 states have call successors, (65), 63 states have call predecessors, (65), 61 states have return successors, (63), 61 states have call predecessors, (63), 62 states have call successors, (63) [2022-03-20 22:25:30,225 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 631 transitions. [2022-03-20 22:25:30,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2022-03-20 22:25:30,228 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:25:30,228 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 61, 61, 61, 61, 61, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:25:30,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-20 22:25:30,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-03-20 22:25:30,447 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:25:30,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:25:30,448 INFO L85 PathProgramCache]: Analyzing trace with hash -346340708, now seen corresponding path program 121 times [2022-03-20 22:25:30,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:30,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1763067707] [2022-03-20 22:25:30,448 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:25:30,448 INFO L85 PathProgramCache]: Analyzing trace with hash -346340708, now seen corresponding path program 122 times [2022-03-20 22:25:30,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:25:30,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109439832] [2022-03-20 22:25:30,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:25:30,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:25:30,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:25:30,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467207943] [2022-03-20 22:25:30,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:25:30,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:30,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:25:30,463 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:25:30,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 22:25:30,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:25:30,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:25:30,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1496 conjuncts, 127 conjunts are in the unsatisfiable core [2022-03-20 22:25:30,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:25:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16718 backedges. 122 proven. 16592 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:25:31,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:25:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16718 backedges. 122 proven. 9272 refuted. 0 times theorem prover too weak. 7324 trivial. 0 not checked. [2022-03-20 22:25:33,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:25:33,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109439832] [2022-03-20 22:25:33,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:25:33,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467207943] [2022-03-20 22:25:33,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467207943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:25:33,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:25:33,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 104 [2022-03-20 22:25:33,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:25:33,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1763067707] [2022-03-20 22:25:33,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1763067707] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:25:33,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:25:33,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 22:25:33,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925460210] [2022-03-20 22:25:33,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:25:33,546 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 22:25:33,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:33,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 22:25:33,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:25:33,548 INFO L87 Difference]: Start difference. First operand 569 states and 631 transitions. Second operand has 65 states, 65 states have (on average 6.753846153846154) internal successors, (439), 64 states have internal predecessors, (439), 64 states have call successors, (66), 64 states have call predecessors, (66), 62 states have return successors, (64), 62 states have call predecessors, (64), 63 states have call successors, (64) [2022-03-20 22:25:34,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:25:34,768 INFO L93 Difference]: Finished difference Result 583 states and 646 transitions. [2022-03-20 22:25:34,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-20 22:25:34,769 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 6.753846153846154) internal successors, (439), 64 states have internal predecessors, (439), 64 states have call successors, (66), 64 states have call predecessors, (66), 62 states have return successors, (64), 62 states have call predecessors, (64), 63 states have call successors, (64) Word has length 572 [2022-03-20 22:25:34,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:25:34,771 INFO L225 Difference]: With dead ends: 583 [2022-03-20 22:25:34,771 INFO L226 Difference]: Without dead ends: 578 [2022-03-20 22:25:34,773 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1204 GetRequests, 1040 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=11439, Invalid=15621, Unknown=0, NotChecked=0, Total=27060 [2022-03-20 22:25:34,773 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 213 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:25:34,773 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 582 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:25:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-03-20 22:25:34,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 578. [2022-03-20 22:25:34,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 446 states have (on average 1.141255605381166) internal successors, (509), 446 states have internal predecessors, (509), 67 states have call successors, (67), 66 states have call predecessors, (67), 64 states have return successors, (65), 65 states have call predecessors, (65), 65 states have call successors, (65) [2022-03-20 22:25:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 641 transitions. [2022-03-20 22:25:34,810 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 641 transitions. Word has length 572 [2022-03-20 22:25:34,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:25:34,810 INFO L478 AbstractCegarLoop]: Abstraction has 578 states and 641 transitions. [2022-03-20 22:25:34,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 6.753846153846154) internal successors, (439), 64 states have internal predecessors, (439), 64 states have call successors, (66), 64 states have call predecessors, (66), 62 states have return successors, (64), 62 states have call predecessors, (64), 63 states have call successors, (64) [2022-03-20 22:25:34,810 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 641 transitions. [2022-03-20 22:25:34,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2022-03-20 22:25:34,813 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:25:34,813 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 62, 62, 62, 62, 62, 62, 62, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:25:34,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-20 22:25:35,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:35,031 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:25:35,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:25:35,031 INFO L85 PathProgramCache]: Analyzing trace with hash 162131030, now seen corresponding path program 123 times [2022-03-20 22:25:35,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:35,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1537605765] [2022-03-20 22:25:35,032 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:25:35,032 INFO L85 PathProgramCache]: Analyzing trace with hash 162131030, now seen corresponding path program 124 times [2022-03-20 22:25:35,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:25:35,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764682389] [2022-03-20 22:25:35,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:25:35,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:25:35,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:25:35,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427317647] [2022-03-20 22:25:35,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:25:35,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:35,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:25:35,042 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:25:35,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 22:25:35,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:25:35,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:25:35,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 1519 conjuncts, 129 conjunts are in the unsatisfiable core [2022-03-20 22:25:35,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:25:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 17271 backedges. 124 proven. 17143 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:25:37,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:25:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17271 backedges. 124 proven. 9579 refuted. 0 times theorem prover too weak. 7568 trivial. 0 not checked. [2022-03-20 22:25:38,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:25:38,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764682389] [2022-03-20 22:25:38,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:25:38,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427317647] [2022-03-20 22:25:38,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427317647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:25:38,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:25:38,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 104 [2022-03-20 22:25:38,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:25:38,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1537605765] [2022-03-20 22:25:38,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1537605765] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:25:38,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:25:38,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-20 22:25:38,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784333048] [2022-03-20 22:25:38,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:25:38,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 22:25:38,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:38,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 22:25:38,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:25:38,675 INFO L87 Difference]: Start difference. First operand 578 states and 641 transitions. Second operand has 66 states, 66 states have (on average 6.757575757575758) internal successors, (446), 65 states have internal predecessors, (446), 65 states have call successors, (67), 65 states have call predecessors, (67), 63 states have return successors, (65), 63 states have call predecessors, (65), 64 states have call successors, (65) [2022-03-20 22:25:40,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:25:40,236 INFO L93 Difference]: Finished difference Result 592 states and 656 transitions. [2022-03-20 22:25:40,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-03-20 22:25:40,237 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 6.757575757575758) internal successors, (446), 65 states have internal predecessors, (446), 65 states have call successors, (67), 65 states have call predecessors, (67), 63 states have return successors, (65), 63 states have call predecessors, (65), 64 states have call successors, (65) Word has length 581 [2022-03-20 22:25:40,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:25:40,239 INFO L225 Difference]: With dead ends: 592 [2022-03-20 22:25:40,239 INFO L226 Difference]: Without dead ends: 587 [2022-03-20 22:25:40,241 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1223 GetRequests, 1058 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2089 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=11542, Invalid=15848, Unknown=0, NotChecked=0, Total=27390 [2022-03-20 22:25:40,241 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 211 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:25:40,242 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 584 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:25:40,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-03-20 22:25:40,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 587. [2022-03-20 22:25:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 453 states have (on average 1.141280353200883) internal successors, (517), 453 states have internal predecessors, (517), 68 states have call successors, (68), 67 states have call predecessors, (68), 65 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-03-20 22:25:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 651 transitions. [2022-03-20 22:25:40,274 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 651 transitions. Word has length 581 [2022-03-20 22:25:40,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:25:40,274 INFO L478 AbstractCegarLoop]: Abstraction has 587 states and 651 transitions. [2022-03-20 22:25:40,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 6.757575757575758) internal successors, (446), 65 states have internal predecessors, (446), 65 states have call successors, (67), 65 states have call predecessors, (67), 63 states have return successors, (65), 63 states have call predecessors, (65), 64 states have call successors, (65) [2022-03-20 22:25:40,275 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 651 transitions. [2022-03-20 22:25:40,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2022-03-20 22:25:40,277 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:25:40,278 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 63, 63, 63, 63, 63, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:25:40,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-20 22:25:40,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-20 22:25:40,479 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:25:40,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:25:40,480 INFO L85 PathProgramCache]: Analyzing trace with hash 472224732, now seen corresponding path program 125 times [2022-03-20 22:25:40,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:40,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2023781240] [2022-03-20 22:25:40,480 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:25:40,480 INFO L85 PathProgramCache]: Analyzing trace with hash 472224732, now seen corresponding path program 126 times [2022-03-20 22:25:40,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:25:40,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269839556] [2022-03-20 22:25:40,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:25:40,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:25:40,498 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:25:40,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712934014] [2022-03-20 22:25:40,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:25:40,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:40,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:25:40,499 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:25:40,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-20 22:25:40,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2022-03-20 22:25:40,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:25:40,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 131 conjunts are in the unsatisfiable core [2022-03-20 22:25:40,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:25:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 17833 backedges. 126 proven. 17703 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:25:42,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:25:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 17833 backedges. 126 proven. 9891 refuted. 0 times theorem prover too weak. 7816 trivial. 0 not checked. [2022-03-20 22:25:43,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:25:43,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269839556] [2022-03-20 22:25:43,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:25:43,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712934014] [2022-03-20 22:25:43,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712934014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:25:43,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:25:43,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 104 [2022-03-20 22:25:43,858 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:25:43,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2023781240] [2022-03-20 22:25:43,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2023781240] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:25:43,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:25:43,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 22:25:43,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067705636] [2022-03-20 22:25:43,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:25:43,859 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 22:25:43,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:43,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 22:25:43,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:25:43,860 INFO L87 Difference]: Start difference. First operand 587 states and 651 transitions. Second operand has 67 states, 67 states have (on average 6.7611940298507465) internal successors, (453), 66 states have internal predecessors, (453), 66 states have call successors, (68), 66 states have call predecessors, (68), 64 states have return successors, (66), 64 states have call predecessors, (66), 65 states have call successors, (66) [2022-03-20 22:25:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:25:45,087 INFO L93 Difference]: Finished difference Result 601 states and 666 transitions. [2022-03-20 22:25:45,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-03-20 22:25:45,087 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 6.7611940298507465) internal successors, (453), 66 states have internal predecessors, (453), 66 states have call successors, (68), 66 states have call predecessors, (68), 64 states have return successors, (66), 64 states have call predecessors, (66), 65 states have call successors, (66) Word has length 590 [2022-03-20 22:25:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:25:45,089 INFO L225 Difference]: With dead ends: 601 [2022-03-20 22:25:45,089 INFO L226 Difference]: Without dead ends: 596 [2022-03-20 22:25:45,091 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1242 GetRequests, 1076 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2151 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=11645, Invalid=16077, Unknown=0, NotChecked=0, Total=27722 [2022-03-20 22:25:45,091 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 217 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:25:45,091 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 610 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:25:45,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-03-20 22:25:45,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2022-03-20 22:25:45,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 460 states have (on average 1.141304347826087) internal successors, (525), 460 states have internal predecessors, (525), 69 states have call successors, (69), 68 states have call predecessors, (69), 66 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-03-20 22:25:45,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 661 transitions. [2022-03-20 22:25:45,121 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 661 transitions. Word has length 590 [2022-03-20 22:25:45,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:25:45,121 INFO L478 AbstractCegarLoop]: Abstraction has 596 states and 661 transitions. [2022-03-20 22:25:45,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 6.7611940298507465) internal successors, (453), 66 states have internal predecessors, (453), 66 states have call successors, (68), 66 states have call predecessors, (68), 64 states have return successors, (66), 64 states have call predecessors, (66), 65 states have call successors, (66) [2022-03-20 22:25:45,121 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 661 transitions. [2022-03-20 22:25:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 600 [2022-03-20 22:25:45,124 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:25:45,125 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 64, 64, 64, 64, 64, 64, 64, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:25:45,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-20 22:25:45,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-20 22:25:45,343 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:25:45,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:25:45,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1799815958, now seen corresponding path program 127 times [2022-03-20 22:25:45,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:45,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1555654011] [2022-03-20 22:25:45,344 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:25:45,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1799815958, now seen corresponding path program 128 times [2022-03-20 22:25:45,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:25:45,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641846315] [2022-03-20 22:25:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:25:45,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:25:45,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:25:45,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969944241] [2022-03-20 22:25:45,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:25:45,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:45,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:25:45,354 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:25:45,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-20 22:25:45,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:25:45,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:25:45,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 1565 conjuncts, 133 conjunts are in the unsatisfiable core [2022-03-20 22:25:45,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:25:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18404 backedges. 128 proven. 18272 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:25:46,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:25:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 18404 backedges. 128 proven. 10208 refuted. 0 times theorem prover too weak. 8068 trivial. 0 not checked. [2022-03-20 22:25:48,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:25:48,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641846315] [2022-03-20 22:25:48,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:25:48,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969944241] [2022-03-20 22:25:48,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969944241] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:25:48,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:25:48,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 104 [2022-03-20 22:25:48,170 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:25:48,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1555654011] [2022-03-20 22:25:48,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1555654011] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:25:48,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:25:48,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-20 22:25:48,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60009759] [2022-03-20 22:25:48,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:25:48,171 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 22:25:48,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:48,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 22:25:48,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:25:48,173 INFO L87 Difference]: Start difference. First operand 596 states and 661 transitions. Second operand has 68 states, 68 states have (on average 6.764705882352941) internal successors, (460), 67 states have internal predecessors, (460), 67 states have call successors, (69), 67 states have call predecessors, (69), 65 states have return successors, (67), 65 states have call predecessors, (67), 66 states have call successors, (67) [2022-03-20 22:25:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:25:49,422 INFO L93 Difference]: Finished difference Result 610 states and 676 transitions. [2022-03-20 22:25:49,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-03-20 22:25:49,422 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 6.764705882352941) internal successors, (460), 67 states have internal predecessors, (460), 67 states have call successors, (69), 67 states have call predecessors, (69), 65 states have return successors, (67), 65 states have call predecessors, (67), 66 states have call successors, (67) Word has length 599 [2022-03-20 22:25:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:25:49,424 INFO L225 Difference]: With dead ends: 610 [2022-03-20 22:25:49,424 INFO L226 Difference]: Without dead ends: 605 [2022-03-20 22:25:49,426 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1261 GetRequests, 1094 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=11748, Invalid=16308, Unknown=0, NotChecked=0, Total=28056 [2022-03-20 22:25:49,426 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 243 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:25:49,426 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 594 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:25:49,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2022-03-20 22:25:49,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 605. [2022-03-20 22:25:49,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 467 states have (on average 1.1413276231263383) internal successors, (533), 467 states have internal predecessors, (533), 70 states have call successors, (70), 69 states have call predecessors, (70), 67 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2022-03-20 22:25:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 671 transitions. [2022-03-20 22:25:49,455 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 671 transitions. Word has length 599 [2022-03-20 22:25:49,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:25:49,456 INFO L478 AbstractCegarLoop]: Abstraction has 605 states and 671 transitions. [2022-03-20 22:25:49,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 6.764705882352941) internal successors, (460), 67 states have internal predecessors, (460), 67 states have call successors, (69), 67 states have call predecessors, (69), 65 states have return successors, (67), 65 states have call predecessors, (67), 66 states have call successors, (67) [2022-03-20 22:25:49,456 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 671 transitions. [2022-03-20 22:25:49,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2022-03-20 22:25:49,459 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:25:49,459 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 65, 65, 65, 65, 65, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:25:49,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-20 22:25:49,678 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-20 22:25:49,678 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:25:49,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:25:49,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1040837348, now seen corresponding path program 129 times [2022-03-20 22:25:49,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:49,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1259777628] [2022-03-20 22:25:49,679 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:25:49,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1040837348, now seen corresponding path program 130 times [2022-03-20 22:25:49,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:25:49,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476511211] [2022-03-20 22:25:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:25:49,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:25:49,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:25:49,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151679202] [2022-03-20 22:25:49,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:25:49,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:49,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:25:49,692 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:25:49,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-20 22:25:49,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:25:49,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:25:49,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1588 conjuncts, 135 conjunts are in the unsatisfiable core [2022-03-20 22:25:49,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:25:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 18984 backedges. 130 proven. 18850 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:25:51,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:25:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18984 backedges. 130 proven. 10530 refuted. 0 times theorem prover too weak. 8324 trivial. 0 not checked. [2022-03-20 22:25:52,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:25:52,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476511211] [2022-03-20 22:25:52,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:25:52,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151679202] [2022-03-20 22:25:52,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151679202] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:25:52,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:25:52,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 104 [2022-03-20 22:25:52,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:25:52,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1259777628] [2022-03-20 22:25:52,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1259777628] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:25:52,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:25:52,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 22:25:52,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305043104] [2022-03-20 22:25:52,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:25:52,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 22:25:52,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:52,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 22:25:52,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:25:52,759 INFO L87 Difference]: Start difference. First operand 605 states and 671 transitions. Second operand has 69 states, 69 states have (on average 6.768115942028985) internal successors, (467), 68 states have internal predecessors, (467), 68 states have call successors, (70), 68 states have call predecessors, (70), 66 states have return successors, (68), 66 states have call predecessors, (68), 67 states have call successors, (68) [2022-03-20 22:25:54,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:25:54,109 INFO L93 Difference]: Finished difference Result 619 states and 686 transitions. [2022-03-20 22:25:54,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-03-20 22:25:54,109 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 6.768115942028985) internal successors, (467), 68 states have internal predecessors, (467), 68 states have call successors, (70), 68 states have call predecessors, (70), 66 states have return successors, (68), 66 states have call predecessors, (68), 67 states have call successors, (68) Word has length 608 [2022-03-20 22:25:54,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:25:54,111 INFO L225 Difference]: With dead ends: 619 [2022-03-20 22:25:54,111 INFO L226 Difference]: Without dead ends: 614 [2022-03-20 22:25:54,113 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1280 GetRequests, 1112 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=11851, Invalid=16541, Unknown=0, NotChecked=0, Total=28392 [2022-03-20 22:25:54,113 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 205 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:25:54,113 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 638 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:25:54,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-03-20 22:25:54,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2022-03-20 22:25:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 474 states have (on average 1.141350210970464) internal successors, (541), 474 states have internal predecessors, (541), 71 states have call successors, (71), 70 states have call predecessors, (71), 68 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2022-03-20 22:25:54,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 681 transitions. [2022-03-20 22:25:54,144 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 681 transitions. Word has length 608 [2022-03-20 22:25:54,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:25:54,144 INFO L478 AbstractCegarLoop]: Abstraction has 614 states and 681 transitions. [2022-03-20 22:25:54,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 6.768115942028985) internal successors, (467), 68 states have internal predecessors, (467), 68 states have call successors, (70), 68 states have call predecessors, (70), 66 states have return successors, (68), 66 states have call predecessors, (68), 67 states have call successors, (68) [2022-03-20 22:25:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 681 transitions. [2022-03-20 22:25:54,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2022-03-20 22:25:54,148 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:25:54,148 INFO L499 BasicCegarLoop]: trace histogram [67, 67, 66, 66, 66, 66, 66, 66, 66, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:25:54,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-20 22:25:54,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-20 22:25:54,367 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:25:54,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:25:54,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1674832342, now seen corresponding path program 131 times [2022-03-20 22:25:54,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:54,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1319768519] [2022-03-20 22:25:54,367 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:25:54,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1674832342, now seen corresponding path program 132 times [2022-03-20 22:25:54,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:25:54,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093276281] [2022-03-20 22:25:54,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:25:54,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:25:54,376 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:25:54,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536457056] [2022-03-20 22:25:54,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:25:54,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:25:54,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:25:54,378 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:25:54,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-20 22:25:54,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2022-03-20 22:25:54,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:25:54,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1611 conjuncts, 137 conjunts are in the unsatisfiable core [2022-03-20 22:25:54,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:25:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 19573 backedges. 132 proven. 19437 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:25:56,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:25:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 19573 backedges. 132 proven. 10857 refuted. 0 times theorem prover too weak. 8584 trivial. 0 not checked. [2022-03-20 22:25:58,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:25:58,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093276281] [2022-03-20 22:25:58,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:25:58,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536457056] [2022-03-20 22:25:58,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536457056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:25:58,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:25:58,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 104 [2022-03-20 22:25:58,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:25:58,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1319768519] [2022-03-20 22:25:58,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1319768519] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:25:58,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:25:58,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-20 22:25:58,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171711513] [2022-03-20 22:25:58,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:25:58,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 22:25:58,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:25:58,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 22:25:58,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:25:58,051 INFO L87 Difference]: Start difference. First operand 614 states and 681 transitions. Second operand has 70 states, 70 states have (on average 6.771428571428571) internal successors, (474), 69 states have internal predecessors, (474), 69 states have call successors, (71), 69 states have call predecessors, (71), 67 states have return successors, (69), 67 states have call predecessors, (69), 68 states have call successors, (69) [2022-03-20 22:26:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:00,027 INFO L93 Difference]: Finished difference Result 628 states and 696 transitions. [2022-03-20 22:26:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-03-20 22:26:00,028 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.771428571428571) internal successors, (474), 69 states have internal predecessors, (474), 69 states have call successors, (71), 69 states have call predecessors, (71), 67 states have return successors, (69), 67 states have call predecessors, (69), 68 states have call successors, (69) Word has length 617 [2022-03-20 22:26:00,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:00,030 INFO L225 Difference]: With dead ends: 628 [2022-03-20 22:26:00,030 INFO L226 Difference]: Without dead ends: 623 [2022-03-20 22:26:00,032 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1299 GetRequests, 1130 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=11954, Invalid=16776, Unknown=0, NotChecked=0, Total=28730 [2022-03-20 22:26:00,032 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 302 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:00,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 616 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:26:00,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-03-20 22:26:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2022-03-20 22:26:00,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 481 states have (on average 1.1413721413721414) internal successors, (549), 481 states have internal predecessors, (549), 72 states have call successors, (72), 71 states have call predecessors, (72), 69 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2022-03-20 22:26:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 691 transitions. [2022-03-20 22:26:00,064 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 691 transitions. Word has length 617 [2022-03-20 22:26:00,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:00,064 INFO L478 AbstractCegarLoop]: Abstraction has 623 states and 691 transitions. [2022-03-20 22:26:00,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 6.771428571428571) internal successors, (474), 69 states have internal predecessors, (474), 69 states have call successors, (71), 69 states have call predecessors, (71), 67 states have return successors, (69), 67 states have call predecessors, (69), 68 states have call successors, (69) [2022-03-20 22:26:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 691 transitions. [2022-03-20 22:26:00,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2022-03-20 22:26:00,068 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:00,068 INFO L499 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 67, 67, 67, 67, 67, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:00,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-20 22:26:00,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:00,276 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:00,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:00,276 INFO L85 PathProgramCache]: Analyzing trace with hash -643774884, now seen corresponding path program 133 times [2022-03-20 22:26:00,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:00,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1758022957] [2022-03-20 22:26:00,277 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:00,277 INFO L85 PathProgramCache]: Analyzing trace with hash -643774884, now seen corresponding path program 134 times [2022-03-20 22:26:00,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:00,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007006849] [2022-03-20 22:26:00,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:00,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:00,301 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:00,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261617549] [2022-03-20 22:26:00,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:00,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:00,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:00,302 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:26:00,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-20 22:26:00,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:00,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:00,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 1634 conjuncts, 139 conjunts are in the unsatisfiable core [2022-03-20 22:26:00,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20171 backedges. 134 proven. 20033 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:26:02,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:03,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20171 backedges. 134 proven. 11189 refuted. 0 times theorem prover too weak. 8848 trivial. 0 not checked. [2022-03-20 22:26:03,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:03,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007006849] [2022-03-20 22:26:03,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:03,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261617549] [2022-03-20 22:26:03,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261617549] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:03,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:03,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 104 [2022-03-20 22:26:03,803 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:03,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1758022957] [2022-03-20 22:26:03,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1758022957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:03,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:03,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 22:26:03,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119603525] [2022-03-20 22:26:03,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:03,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-20 22:26:03,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:03,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-20 22:26:03,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:26:03,805 INFO L87 Difference]: Start difference. First operand 623 states and 691 transitions. Second operand has 71 states, 71 states have (on average 6.774647887323944) internal successors, (481), 70 states have internal predecessors, (481), 70 states have call successors, (72), 70 states have call predecessors, (72), 68 states have return successors, (70), 68 states have call predecessors, (70), 69 states have call successors, (70) [2022-03-20 22:26:05,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:05,185 INFO L93 Difference]: Finished difference Result 637 states and 706 transitions. [2022-03-20 22:26:05,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-03-20 22:26:05,185 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.774647887323944) internal successors, (481), 70 states have internal predecessors, (481), 70 states have call successors, (72), 70 states have call predecessors, (72), 68 states have return successors, (70), 68 states have call predecessors, (70), 69 states have call successors, (70) Word has length 626 [2022-03-20 22:26:05,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:05,187 INFO L225 Difference]: With dead ends: 637 [2022-03-20 22:26:05,187 INFO L226 Difference]: Without dead ends: 632 [2022-03-20 22:26:05,189 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1318 GetRequests, 1148 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2409 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=12057, Invalid=17013, Unknown=0, NotChecked=0, Total=29070 [2022-03-20 22:26:05,189 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 261 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:05,189 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 624 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:26:05,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-03-20 22:26:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 632. [2022-03-20 22:26:05,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 488 states have (on average 1.1413934426229508) internal successors, (557), 488 states have internal predecessors, (557), 73 states have call successors, (73), 72 states have call predecessors, (73), 70 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2022-03-20 22:26:05,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 701 transitions. [2022-03-20 22:26:05,220 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 701 transitions. Word has length 626 [2022-03-20 22:26:05,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:05,220 INFO L478 AbstractCegarLoop]: Abstraction has 632 states and 701 transitions. [2022-03-20 22:26:05,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 6.774647887323944) internal successors, (481), 70 states have internal predecessors, (481), 70 states have call successors, (72), 70 states have call predecessors, (72), 68 states have return successors, (70), 68 states have call predecessors, (70), 69 states have call successors, (70) [2022-03-20 22:26:05,220 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 701 transitions. [2022-03-20 22:26:05,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 636 [2022-03-20 22:26:05,223 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:05,224 INFO L499 BasicCegarLoop]: trace histogram [69, 69, 68, 68, 68, 68, 68, 68, 68, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:05,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-20 22:26:05,441 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:05,442 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:05,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:05,442 INFO L85 PathProgramCache]: Analyzing trace with hash 620535958, now seen corresponding path program 135 times [2022-03-20 22:26:05,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:05,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1073589058] [2022-03-20 22:26:05,442 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:05,442 INFO L85 PathProgramCache]: Analyzing trace with hash 620535958, now seen corresponding path program 136 times [2022-03-20 22:26:05,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:05,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447743627] [2022-03-20 22:26:05,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:05,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:05,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:05,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955644523] [2022-03-20 22:26:05,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:26:05,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:05,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:05,453 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:26:05,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-20 22:26:05,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:26:05,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:05,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 141 conjunts are in the unsatisfiable core [2022-03-20 22:26:05,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20778 backedges. 136 proven. 20638 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:26:07,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20778 backedges. 136 proven. 11526 refuted. 0 times theorem prover too weak. 9116 trivial. 0 not checked. [2022-03-20 22:26:10,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:10,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447743627] [2022-03-20 22:26:10,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:10,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955644523] [2022-03-20 22:26:10,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955644523] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:10,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:10,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 104 [2022-03-20 22:26:10,152 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:10,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1073589058] [2022-03-20 22:26:10,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1073589058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:10,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:10,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-20 22:26:10,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260629282] [2022-03-20 22:26:10,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:10,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-20 22:26:10,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:10,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-20 22:26:10,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:26:10,154 INFO L87 Difference]: Start difference. First operand 632 states and 701 transitions. Second operand has 72 states, 72 states have (on average 6.777777777777778) internal successors, (488), 71 states have internal predecessors, (488), 71 states have call successors, (73), 71 states have call predecessors, (73), 69 states have return successors, (71), 69 states have call predecessors, (71), 70 states have call successors, (71) [2022-03-20 22:26:12,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:12,148 INFO L93 Difference]: Finished difference Result 646 states and 716 transitions. [2022-03-20 22:26:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-03-20 22:26:12,148 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 6.777777777777778) internal successors, (488), 71 states have internal predecessors, (488), 71 states have call successors, (73), 71 states have call predecessors, (73), 69 states have return successors, (71), 69 states have call predecessors, (71), 70 states have call successors, (71) Word has length 635 [2022-03-20 22:26:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:12,150 INFO L225 Difference]: With dead ends: 646 [2022-03-20 22:26:12,151 INFO L226 Difference]: Without dead ends: 641 [2022-03-20 22:26:12,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1337 GetRequests, 1166 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=12160, Invalid=17252, Unknown=0, NotChecked=0, Total=29412 [2022-03-20 22:26:12,153 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 263 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:12,153 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 650 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:26:12,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-03-20 22:26:12,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 641. [2022-03-20 22:26:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 495 states have (on average 1.1414141414141414) internal successors, (565), 495 states have internal predecessors, (565), 74 states have call successors, (74), 73 states have call predecessors, (74), 71 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-20 22:26:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 711 transitions. [2022-03-20 22:26:12,207 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 711 transitions. Word has length 635 [2022-03-20 22:26:12,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:12,208 INFO L478 AbstractCegarLoop]: Abstraction has 641 states and 711 transitions. [2022-03-20 22:26:12,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 6.777777777777778) internal successors, (488), 71 states have internal predecessors, (488), 71 states have call successors, (73), 71 states have call predecessors, (73), 69 states have return successors, (71), 69 states have call predecessors, (71), 70 states have call successors, (71) [2022-03-20 22:26:12,208 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 711 transitions. [2022-03-20 22:26:12,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2022-03-20 22:26:12,211 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:12,212 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 69, 69, 69, 69, 69, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:12,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-20 22:26:12,425 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:12,425 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:12,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:12,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1392093084, now seen corresponding path program 137 times [2022-03-20 22:26:12,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:12,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [841743096] [2022-03-20 22:26:12,426 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:12,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1392093084, now seen corresponding path program 138 times [2022-03-20 22:26:12,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:12,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042847912] [2022-03-20 22:26:12,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:12,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:12,439 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:12,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640769201] [2022-03-20 22:26:12,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:26:12,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:12,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:12,441 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:26:12,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-20 22:26:12,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2022-03-20 22:26:12,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:12,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1680 conjuncts, 143 conjunts are in the unsatisfiable core [2022-03-20 22:26:12,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 21394 backedges. 138 proven. 21252 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:26:15,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 21394 backedges. 138 proven. 11868 refuted. 0 times theorem prover too weak. 9388 trivial. 0 not checked. [2022-03-20 22:26:16,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:16,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042847912] [2022-03-20 22:26:16,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:16,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640769201] [2022-03-20 22:26:16,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640769201] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:16,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:16,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 104 [2022-03-20 22:26:16,974 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:16,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [841743096] [2022-03-20 22:26:16,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [841743096] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:16,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:16,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 22:26:16,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789703606] [2022-03-20 22:26:16,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:16,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-20 22:26:16,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:16,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-20 22:26:16,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:26:16,976 INFO L87 Difference]: Start difference. First operand 641 states and 711 transitions. Second operand has 73 states, 73 states have (on average 6.780821917808219) internal successors, (495), 72 states have internal predecessors, (495), 72 states have call successors, (74), 72 states have call predecessors, (74), 70 states have return successors, (72), 70 states have call predecessors, (72), 71 states have call successors, (72) [2022-03-20 22:26:18,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:18,763 INFO L93 Difference]: Finished difference Result 655 states and 726 transitions. [2022-03-20 22:26:18,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-03-20 22:26:18,764 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 6.780821917808219) internal successors, (495), 72 states have internal predecessors, (495), 72 states have call successors, (74), 72 states have call predecessors, (74), 70 states have return successors, (72), 70 states have call predecessors, (72), 71 states have call successors, (72) Word has length 644 [2022-03-20 22:26:18,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:18,766 INFO L225 Difference]: With dead ends: 655 [2022-03-20 22:26:18,766 INFO L226 Difference]: Without dead ends: 650 [2022-03-20 22:26:18,769 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1356 GetRequests, 1184 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=12263, Invalid=17493, Unknown=0, NotChecked=0, Total=29756 [2022-03-20 22:26:18,769 INFO L913 BasicCegarLoop]: 95 mSDtfsCounter, 327 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:18,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 628 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:26:18,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-03-20 22:26:18,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2022-03-20 22:26:18,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 502 states have (on average 1.1414342629482073) internal successors, (573), 502 states have internal predecessors, (573), 75 states have call successors, (75), 74 states have call predecessors, (75), 72 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2022-03-20 22:26:18,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 721 transitions. [2022-03-20 22:26:18,800 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 721 transitions. Word has length 644 [2022-03-20 22:26:18,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:18,801 INFO L478 AbstractCegarLoop]: Abstraction has 650 states and 721 transitions. [2022-03-20 22:26:18,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 6.780821917808219) internal successors, (495), 72 states have internal predecessors, (495), 72 states have call successors, (74), 72 states have call predecessors, (74), 70 states have return successors, (72), 70 states have call predecessors, (72), 71 states have call successors, (72) [2022-03-20 22:26:18,801 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 721 transitions. [2022-03-20 22:26:18,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 654 [2022-03-20 22:26:18,804 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:18,805 INFO L499 BasicCegarLoop]: trace histogram [71, 71, 70, 70, 70, 70, 70, 70, 70, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:18,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-20 22:26:19,013 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-03-20 22:26:19,013 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:19,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:19,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1298999126, now seen corresponding path program 139 times [2022-03-20 22:26:19,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:19,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1668383688] [2022-03-20 22:26:19,014 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:19,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1298999126, now seen corresponding path program 140 times [2022-03-20 22:26:19,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:19,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118313602] [2022-03-20 22:26:19,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:19,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:19,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:19,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1556492276] [2022-03-20 22:26:19,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:19,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:19,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:19,030 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:26:19,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-20 22:26:19,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:19,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:19,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 1703 conjuncts, 145 conjunts are in the unsatisfiable core [2022-03-20 22:26:19,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 22019 backedges. 140 proven. 21875 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:26:20,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:22,508 INFO L134 CoverageAnalysis]: Checked inductivity of 22019 backedges. 140 proven. 12215 refuted. 0 times theorem prover too weak. 9664 trivial. 0 not checked. [2022-03-20 22:26:22,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:22,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118313602] [2022-03-20 22:26:22,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:22,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556492276] [2022-03-20 22:26:22,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556492276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:22,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:22,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 104 [2022-03-20 22:26:22,509 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:22,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1668383688] [2022-03-20 22:26:22,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1668383688] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:22,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:22,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-20 22:26:22,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224599513] [2022-03-20 22:26:22,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:22,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 22:26:22,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:22,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 22:26:22,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:26:22,511 INFO L87 Difference]: Start difference. First operand 650 states and 721 transitions. Second operand has 74 states, 74 states have (on average 6.783783783783784) internal successors, (502), 73 states have internal predecessors, (502), 73 states have call successors, (75), 73 states have call predecessors, (75), 71 states have return successors, (73), 71 states have call predecessors, (73), 72 states have call successors, (73) [2022-03-20 22:26:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:24,295 INFO L93 Difference]: Finished difference Result 664 states and 736 transitions. [2022-03-20 22:26:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-03-20 22:26:24,296 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 6.783783783783784) internal successors, (502), 73 states have internal predecessors, (502), 73 states have call successors, (75), 73 states have call predecessors, (75), 71 states have return successors, (73), 71 states have call predecessors, (73), 72 states have call successors, (73) Word has length 653 [2022-03-20 22:26:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:24,298 INFO L225 Difference]: With dead ends: 664 [2022-03-20 22:26:24,298 INFO L226 Difference]: Without dead ends: 659 [2022-03-20 22:26:24,299 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1375 GetRequests, 1202 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2613 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=12366, Invalid=17736, Unknown=0, NotChecked=0, Total=30102 [2022-03-20 22:26:24,300 INFO L913 BasicCegarLoop]: 96 mSDtfsCounter, 273 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:24,300 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 654 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:26:24,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-03-20 22:26:24,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 659. [2022-03-20 22:26:24,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 509 states have (on average 1.1414538310412574) internal successors, (581), 509 states have internal predecessors, (581), 76 states have call successors, (76), 75 states have call predecessors, (76), 73 states have return successors, (74), 74 states have call predecessors, (74), 74 states have call successors, (74) [2022-03-20 22:26:24,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 731 transitions. [2022-03-20 22:26:24,332 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 731 transitions. Word has length 653 [2022-03-20 22:26:24,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:24,333 INFO L478 AbstractCegarLoop]: Abstraction has 659 states and 731 transitions. [2022-03-20 22:26:24,333 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 6.783783783783784) internal successors, (502), 73 states have internal predecessors, (502), 73 states have call successors, (75), 73 states have call predecessors, (75), 71 states have return successors, (73), 71 states have call predecessors, (73), 72 states have call successors, (73) [2022-03-20 22:26:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 731 transitions. [2022-03-20 22:26:24,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2022-03-20 22:26:24,336 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:24,337 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 71, 71, 71, 71, 71, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:24,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-20 22:26:24,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:24,547 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:24,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:24,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1356118236, now seen corresponding path program 141 times [2022-03-20 22:26:24,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:24,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [815277065] [2022-03-20 22:26:24,548 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:24,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1356118236, now seen corresponding path program 142 times [2022-03-20 22:26:24,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:24,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795356943] [2022-03-20 22:26:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:24,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:24,568 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:24,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506099844] [2022-03-20 22:26:24,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:26:24,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:24,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:24,569 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:26:24,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-20 22:26:24,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:26:24,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:24,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1726 conjuncts, 147 conjunts are in the unsatisfiable core [2022-03-20 22:26:24,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 22653 backedges. 142 proven. 22507 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:26:27,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 22653 backedges. 142 proven. 12567 refuted. 0 times theorem prover too weak. 9944 trivial. 0 not checked. [2022-03-20 22:26:28,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:28,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795356943] [2022-03-20 22:26:28,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:28,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506099844] [2022-03-20 22:26:28,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506099844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:28,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:28,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 104 [2022-03-20 22:26:28,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:28,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [815277065] [2022-03-20 22:26:28,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [815277065] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:28,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:28,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 22:26:28,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344641324] [2022-03-20 22:26:28,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:28,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 22:26:28,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:28,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 22:26:28,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:26:28,986 INFO L87 Difference]: Start difference. First operand 659 states and 731 transitions. Second operand has 75 states, 75 states have (on average 6.786666666666667) internal successors, (509), 74 states have internal predecessors, (509), 74 states have call successors, (76), 74 states have call predecessors, (76), 72 states have return successors, (74), 72 states have call predecessors, (74), 73 states have call successors, (74) [2022-03-20 22:26:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:30,692 INFO L93 Difference]: Finished difference Result 673 states and 746 transitions. [2022-03-20 22:26:30,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-03-20 22:26:30,692 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 6.786666666666667) internal successors, (509), 74 states have internal predecessors, (509), 74 states have call successors, (76), 74 states have call predecessors, (76), 72 states have return successors, (74), 72 states have call predecessors, (74), 73 states have call successors, (74) Word has length 662 [2022-03-20 22:26:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:30,694 INFO L225 Difference]: With dead ends: 673 [2022-03-20 22:26:30,694 INFO L226 Difference]: Without dead ends: 668 [2022-03-20 22:26:30,695 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1394 GetRequests, 1220 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2683 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=12469, Invalid=17981, Unknown=0, NotChecked=0, Total=30450 [2022-03-20 22:26:30,698 INFO L913 BasicCegarLoop]: 97 mSDtfsCounter, 251 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:30,698 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 662 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:26:30,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-03-20 22:26:30,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 668. [2022-03-20 22:26:30,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 516 states have (on average 1.1414728682170543) internal successors, (589), 516 states have internal predecessors, (589), 77 states have call successors, (77), 76 states have call predecessors, (77), 74 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2022-03-20 22:26:30,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 741 transitions. [2022-03-20 22:26:30,765 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 741 transitions. Word has length 662 [2022-03-20 22:26:30,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:30,765 INFO L478 AbstractCegarLoop]: Abstraction has 668 states and 741 transitions. [2022-03-20 22:26:30,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 6.786666666666667) internal successors, (509), 74 states have internal predecessors, (509), 74 states have call successors, (76), 74 states have call predecessors, (76), 72 states have return successors, (74), 72 states have call predecessors, (74), 73 states have call successors, (74) [2022-03-20 22:26:30,765 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 741 transitions. [2022-03-20 22:26:30,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2022-03-20 22:26:30,769 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:30,769 INFO L499 BasicCegarLoop]: trace histogram [73, 73, 72, 72, 72, 72, 72, 72, 72, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:30,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-20 22:26:30,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:30,987 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:30,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:30,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1462665706, now seen corresponding path program 143 times [2022-03-20 22:26:30,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:30,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1169805256] [2022-03-20 22:26:30,988 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:30,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1462665706, now seen corresponding path program 144 times [2022-03-20 22:26:30,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:30,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901135406] [2022-03-20 22:26:30,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:30,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:31,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:31,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046897533] [2022-03-20 22:26:31,000 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:26:31,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:31,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:31,001 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:26:31,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-20 22:26:31,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2022-03-20 22:26:31,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:31,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 1749 conjuncts, 149 conjunts are in the unsatisfiable core [2022-03-20 22:26:31,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 23296 backedges. 144 proven. 23148 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:26:33,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 23296 backedges. 144 proven. 12924 refuted. 0 times theorem prover too weak. 10228 trivial. 0 not checked. [2022-03-20 22:26:34,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:34,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901135406] [2022-03-20 22:26:34,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:34,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046897533] [2022-03-20 22:26:34,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046897533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:34,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:34,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 104 [2022-03-20 22:26:34,489 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:34,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1169805256] [2022-03-20 22:26:34,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1169805256] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:34,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:34,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-20 22:26:34,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342761912] [2022-03-20 22:26:34,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:34,490 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-20 22:26:34,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:34,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-20 22:26:34,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:26:34,493 INFO L87 Difference]: Start difference. First operand 668 states and 741 transitions. Second operand has 76 states, 76 states have (on average 6.7894736842105265) internal successors, (516), 75 states have internal predecessors, (516), 75 states have call successors, (77), 75 states have call predecessors, (77), 73 states have return successors, (75), 73 states have call predecessors, (75), 74 states have call successors, (75) [2022-03-20 22:26:36,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:36,603 INFO L93 Difference]: Finished difference Result 682 states and 756 transitions. [2022-03-20 22:26:36,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-03-20 22:26:36,604 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 6.7894736842105265) internal successors, (516), 75 states have internal predecessors, (516), 75 states have call successors, (77), 75 states have call predecessors, (77), 73 states have return successors, (75), 73 states have call predecessors, (75), 74 states have call successors, (75) Word has length 671 [2022-03-20 22:26:36,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:36,606 INFO L225 Difference]: With dead ends: 682 [2022-03-20 22:26:36,607 INFO L226 Difference]: Without dead ends: 677 [2022-03-20 22:26:36,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1413 GetRequests, 1238 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2754 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=12572, Invalid=18228, Unknown=0, NotChecked=0, Total=30800 [2022-03-20 22:26:36,609 INFO L913 BasicCegarLoop]: 98 mSDtfsCounter, 312 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:36,609 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 670 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 22:26:36,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-03-20 22:26:36,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 677. [2022-03-20 22:26:36,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 523 states have (on average 1.1414913957934991) internal successors, (597), 523 states have internal predecessors, (597), 78 states have call successors, (78), 77 states have call predecessors, (78), 75 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2022-03-20 22:26:36,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 751 transitions. [2022-03-20 22:26:36,644 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 751 transitions. Word has length 671 [2022-03-20 22:26:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:36,645 INFO L478 AbstractCegarLoop]: Abstraction has 677 states and 751 transitions. [2022-03-20 22:26:36,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 6.7894736842105265) internal successors, (516), 75 states have internal predecessors, (516), 75 states have call successors, (77), 75 states have call predecessors, (77), 73 states have return successors, (75), 73 states have call predecessors, (75), 74 states have call successors, (75) [2022-03-20 22:26:36,645 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 751 transitions. [2022-03-20 22:26:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2022-03-20 22:26:36,659 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:36,659 INFO L499 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 73, 73, 73, 73, 73, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:36,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-20 22:26:36,867 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-20 22:26:36,868 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:36,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:36,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1761999388, now seen corresponding path program 145 times [2022-03-20 22:26:36,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:36,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [386702026] [2022-03-20 22:26:36,869 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:36,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1761999388, now seen corresponding path program 146 times [2022-03-20 22:26:36,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:36,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968736674] [2022-03-20 22:26:36,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:36,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:36,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:36,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654867165] [2022-03-20 22:26:36,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:36,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:36,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:36,880 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:26:36,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-20 22:26:37,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:37,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:37,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 151 conjunts are in the unsatisfiable core [2022-03-20 22:26:37,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 23948 backedges. 146 proven. 23798 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:26:38,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 23948 backedges. 146 proven. 13286 refuted. 0 times theorem prover too weak. 10516 trivial. 0 not checked. [2022-03-20 22:26:40,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:40,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968736674] [2022-03-20 22:26:40,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:40,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654867165] [2022-03-20 22:26:40,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654867165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:40,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:40,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 104 [2022-03-20 22:26:40,492 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:40,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [386702026] [2022-03-20 22:26:40,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [386702026] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:40,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:40,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 22:26:40,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976431095] [2022-03-20 22:26:40,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:40,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-20 22:26:40,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:40,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-20 22:26:40,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:26:40,494 INFO L87 Difference]: Start difference. First operand 677 states and 751 transitions. Second operand has 77 states, 77 states have (on average 6.792207792207792) internal successors, (523), 76 states have internal predecessors, (523), 76 states have call successors, (78), 76 states have call predecessors, (78), 74 states have return successors, (76), 74 states have call predecessors, (76), 75 states have call successors, (76) [2022-03-20 22:26:42,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:42,209 INFO L93 Difference]: Finished difference Result 691 states and 766 transitions. [2022-03-20 22:26:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-03-20 22:26:42,210 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 6.792207792207792) internal successors, (523), 76 states have internal predecessors, (523), 76 states have call successors, (78), 76 states have call predecessors, (78), 74 states have return successors, (76), 74 states have call predecessors, (76), 75 states have call successors, (76) Word has length 680 [2022-03-20 22:26:42,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:42,212 INFO L225 Difference]: With dead ends: 691 [2022-03-20 22:26:42,212 INFO L226 Difference]: Without dead ends: 686 [2022-03-20 22:26:42,214 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1432 GetRequests, 1256 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2826 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=12675, Invalid=18477, Unknown=0, NotChecked=0, Total=31152 [2022-03-20 22:26:42,214 INFO L913 BasicCegarLoop]: 99 mSDtfsCounter, 344 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:42,215 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 666 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:26:42,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-03-20 22:26:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 686. [2022-03-20 22:26:42,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 530 states have (on average 1.1415094339622642) internal successors, (605), 530 states have internal predecessors, (605), 79 states have call successors, (79), 78 states have call predecessors, (79), 76 states have return successors, (77), 77 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-20 22:26:42,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 761 transitions. [2022-03-20 22:26:42,251 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 761 transitions. Word has length 680 [2022-03-20 22:26:42,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:42,251 INFO L478 AbstractCegarLoop]: Abstraction has 686 states and 761 transitions. [2022-03-20 22:26:42,251 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 6.792207792207792) internal successors, (523), 76 states have internal predecessors, (523), 76 states have call successors, (78), 76 states have call predecessors, (78), 74 states have return successors, (76), 74 states have call predecessors, (76), 75 states have call successors, (76) [2022-03-20 22:26:42,252 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 761 transitions. [2022-03-20 22:26:42,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 690 [2022-03-20 22:26:42,255 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:42,256 INFO L499 BasicCegarLoop]: trace histogram [75, 75, 74, 74, 74, 74, 74, 74, 74, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:42,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-20 22:26:42,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-20 22:26:42,465 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:42,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:42,465 INFO L85 PathProgramCache]: Analyzing trace with hash -271211306, now seen corresponding path program 147 times [2022-03-20 22:26:42,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:42,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1839647182] [2022-03-20 22:26:42,466 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:42,466 INFO L85 PathProgramCache]: Analyzing trace with hash -271211306, now seen corresponding path program 148 times [2022-03-20 22:26:42,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:42,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862013924] [2022-03-20 22:26:42,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:42,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:42,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:42,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125907572] [2022-03-20 22:26:42,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:26:42,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:42,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:42,478 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:26:42,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-20 22:26:42,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:26:42,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:42,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1795 conjuncts, 153 conjunts are in the unsatisfiable core [2022-03-20 22:26:42,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 24609 backedges. 148 proven. 24457 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:26:44,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 24609 backedges. 148 proven. 13653 refuted. 0 times theorem prover too weak. 10808 trivial. 0 not checked. [2022-03-20 22:26:46,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:46,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862013924] [2022-03-20 22:26:46,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:46,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125907572] [2022-03-20 22:26:46,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125907572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:46,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:46,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 104 [2022-03-20 22:26:46,548 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:46,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1839647182] [2022-03-20 22:26:46,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1839647182] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:46,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:46,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-20 22:26:46,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946098138] [2022-03-20 22:26:46,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:46,549 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-20 22:26:46,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:46,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-20 22:26:46,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:26:46,550 INFO L87 Difference]: Start difference. First operand 686 states and 761 transitions. Second operand has 78 states, 78 states have (on average 6.794871794871795) internal successors, (530), 77 states have internal predecessors, (530), 77 states have call successors, (79), 77 states have call predecessors, (79), 75 states have return successors, (77), 75 states have call predecessors, (77), 76 states have call successors, (77) [2022-03-20 22:26:48,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:48,299 INFO L93 Difference]: Finished difference Result 700 states and 776 transitions. [2022-03-20 22:26:48,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-03-20 22:26:48,300 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 6.794871794871795) internal successors, (530), 77 states have internal predecessors, (530), 77 states have call successors, (79), 77 states have call predecessors, (79), 75 states have return successors, (77), 75 states have call predecessors, (77), 76 states have call successors, (77) Word has length 689 [2022-03-20 22:26:48,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:48,302 INFO L225 Difference]: With dead ends: 700 [2022-03-20 22:26:48,302 INFO L226 Difference]: Without dead ends: 695 [2022-03-20 22:26:48,304 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1451 GetRequests, 1274 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2899 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=12778, Invalid=18728, Unknown=0, NotChecked=0, Total=31506 [2022-03-20 22:26:48,304 INFO L913 BasicCegarLoop]: 100 mSDtfsCounter, 288 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:48,304 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 674 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:26:48,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-03-20 22:26:48,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 695. [2022-03-20 22:26:48,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 537 states have (on average 1.1415270018621975) internal successors, (613), 537 states have internal predecessors, (613), 80 states have call successors, (80), 79 states have call predecessors, (80), 77 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-03-20 22:26:48,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 771 transitions. [2022-03-20 22:26:48,339 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 771 transitions. Word has length 689 [2022-03-20 22:26:48,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:48,340 INFO L478 AbstractCegarLoop]: Abstraction has 695 states and 771 transitions. [2022-03-20 22:26:48,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 6.794871794871795) internal successors, (530), 77 states have internal predecessors, (530), 77 states have call successors, (79), 77 states have call predecessors, (79), 75 states have return successors, (77), 75 states have call predecessors, (77), 76 states have call successors, (77) [2022-03-20 22:26:48,340 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 771 transitions. [2022-03-20 22:26:48,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2022-03-20 22:26:48,344 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:48,344 INFO L499 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 75, 75, 75, 75, 75, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:48,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-20 22:26:48,560 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:48,560 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:48,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:48,560 INFO L85 PathProgramCache]: Analyzing trace with hash -463377572, now seen corresponding path program 149 times [2022-03-20 22:26:48,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:48,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [75661937] [2022-03-20 22:26:48,561 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:48,561 INFO L85 PathProgramCache]: Analyzing trace with hash -463377572, now seen corresponding path program 150 times [2022-03-20 22:26:48,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:48,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209048584] [2022-03-20 22:26:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:48,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:48,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:48,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971350280] [2022-03-20 22:26:48,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:26:48,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:48,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:48,572 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:26:48,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-20 22:26:49,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2022-03-20 22:26:49,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:49,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1818 conjuncts, 155 conjunts are in the unsatisfiable core [2022-03-20 22:26:49,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 25279 backedges. 150 proven. 25125 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:26:51,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:26:54,104 INFO L134 CoverageAnalysis]: Checked inductivity of 25279 backedges. 150 proven. 14025 refuted. 0 times theorem prover too weak. 11104 trivial. 0 not checked. [2022-03-20 22:26:54,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:26:54,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209048584] [2022-03-20 22:26:54,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:26:54,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971350280] [2022-03-20 22:26:54,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971350280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:26:54,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:26:54,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 104 [2022-03-20 22:26:54,105 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:26:54,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [75661937] [2022-03-20 22:26:54,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [75661937] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:26:54,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:26:54,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 22:26:54,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681011824] [2022-03-20 22:26:54,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:26:54,106 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-20 22:26:54,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:54,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-20 22:26:54,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:26:54,107 INFO L87 Difference]: Start difference. First operand 695 states and 771 transitions. Second operand has 79 states, 79 states have (on average 6.7974683544303796) internal successors, (537), 78 states have internal predecessors, (537), 78 states have call successors, (80), 78 states have call predecessors, (80), 76 states have return successors, (78), 76 states have call predecessors, (78), 77 states have call successors, (78) [2022-03-20 22:26:55,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:26:55,966 INFO L93 Difference]: Finished difference Result 709 states and 786 transitions. [2022-03-20 22:26:55,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-03-20 22:26:55,967 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 6.7974683544303796) internal successors, (537), 78 states have internal predecessors, (537), 78 states have call successors, (80), 78 states have call predecessors, (80), 76 states have return successors, (78), 76 states have call predecessors, (78), 77 states have call successors, (78) Word has length 698 [2022-03-20 22:26:55,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:26:55,969 INFO L225 Difference]: With dead ends: 709 [2022-03-20 22:26:55,969 INFO L226 Difference]: Without dead ends: 704 [2022-03-20 22:26:55,972 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1470 GetRequests, 1292 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2973 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=12881, Invalid=18981, Unknown=0, NotChecked=0, Total=31862 [2022-03-20 22:26:55,972 INFO L913 BasicCegarLoop]: 101 mSDtfsCounter, 293 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 22:26:55,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 676 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 22:26:55,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-03-20 22:26:56,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 704. [2022-03-20 22:26:56,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 544 states have (on average 1.1415441176470589) internal successors, (621), 544 states have internal predecessors, (621), 81 states have call successors, (81), 80 states have call predecessors, (81), 78 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-20 22:26:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 781 transitions. [2022-03-20 22:26:56,054 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 781 transitions. Word has length 698 [2022-03-20 22:26:56,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:26:56,054 INFO L478 AbstractCegarLoop]: Abstraction has 704 states and 781 transitions. [2022-03-20 22:26:56,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 6.7974683544303796) internal successors, (537), 78 states have internal predecessors, (537), 78 states have call successors, (80), 78 states have call predecessors, (80), 76 states have return successors, (78), 76 states have call predecessors, (78), 77 states have call successors, (78) [2022-03-20 22:26:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 781 transitions. [2022-03-20 22:26:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2022-03-20 22:26:56,058 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:26:56,059 INFO L499 BasicCegarLoop]: trace histogram [77, 77, 76, 76, 76, 76, 76, 76, 76, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:26:56,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-20 22:26:56,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:56,267 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:26:56,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:26:56,267 INFO L85 PathProgramCache]: Analyzing trace with hash -2010801258, now seen corresponding path program 151 times [2022-03-20 22:26:56,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:26:56,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1849639656] [2022-03-20 22:26:56,268 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:26:56,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2010801258, now seen corresponding path program 152 times [2022-03-20 22:26:56,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:26:56,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822692442] [2022-03-20 22:26:56,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:26:56,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:26:56,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:26:56,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326385431] [2022-03-20 22:26:56,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:26:56,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:26:56,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:26:56,290 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:26:56,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-20 22:26:56,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:26:56,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:26:56,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 157 conjunts are in the unsatisfiable core [2022-03-20 22:26:56,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:26:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 25958 backedges. 152 proven. 25802 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:26:59,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:27:01,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25958 backedges. 152 proven. 14402 refuted. 0 times theorem prover too weak. 11404 trivial. 0 not checked. [2022-03-20 22:27:01,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:27:01,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822692442] [2022-03-20 22:27:01,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:27:01,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326385431] [2022-03-20 22:27:01,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326385431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:27:01,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:27:01,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 104 [2022-03-20 22:27:01,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:27:01,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1849639656] [2022-03-20 22:27:01,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1849639656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:27:01,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:27:01,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-20 22:27:01,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673194367] [2022-03-20 22:27:01,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:27:01,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 22:27:01,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:01,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 22:27:01,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:27:01,619 INFO L87 Difference]: Start difference. First operand 704 states and 781 transitions. Second operand has 80 states, 80 states have (on average 6.8) internal successors, (544), 79 states have internal predecessors, (544), 79 states have call successors, (81), 79 states have call predecessors, (81), 77 states have return successors, (79), 77 states have call predecessors, (79), 78 states have call successors, (79) [2022-03-20 22:27:03,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:27:03,632 INFO L93 Difference]: Finished difference Result 718 states and 796 transitions. [2022-03-20 22:27:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-03-20 22:27:03,632 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 6.8) internal successors, (544), 79 states have internal predecessors, (544), 79 states have call successors, (81), 79 states have call predecessors, (81), 77 states have return successors, (79), 77 states have call predecessors, (79), 78 states have call successors, (79) Word has length 707 [2022-03-20 22:27:03,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:27:03,635 INFO L225 Difference]: With dead ends: 718 [2022-03-20 22:27:03,635 INFO L226 Difference]: Without dead ends: 713 [2022-03-20 22:27:03,638 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1489 GetRequests, 1310 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3048 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=12984, Invalid=19236, Unknown=0, NotChecked=0, Total=32220 [2022-03-20 22:27:03,638 INFO L913 BasicCegarLoop]: 102 mSDtfsCounter, 260 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:27:03,638 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 708 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:27:03,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-03-20 22:27:03,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2022-03-20 22:27:03,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 551 states have (on average 1.1415607985480944) internal successors, (629), 551 states have internal predecessors, (629), 82 states have call successors, (82), 81 states have call predecessors, (82), 79 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2022-03-20 22:27:03,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 791 transitions. [2022-03-20 22:27:03,685 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 791 transitions. Word has length 707 [2022-03-20 22:27:03,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:27:03,686 INFO L478 AbstractCegarLoop]: Abstraction has 713 states and 791 transitions. [2022-03-20 22:27:03,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 6.8) internal successors, (544), 79 states have internal predecessors, (544), 79 states have call successors, (81), 79 states have call predecessors, (81), 77 states have return successors, (79), 77 states have call predecessors, (79), 78 states have call successors, (79) [2022-03-20 22:27:03,686 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 791 transitions. [2022-03-20 22:27:03,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2022-03-20 22:27:03,690 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:27:03,691 INFO L499 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 77, 77, 77, 77, 77, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:27:03,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-20 22:27:03,897 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-20 22:27:03,897 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:27:03,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:27:03,897 INFO L85 PathProgramCache]: Analyzing trace with hash -21295972, now seen corresponding path program 153 times [2022-03-20 22:27:03,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:03,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [395866707] [2022-03-20 22:27:03,898 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:27:03,898 INFO L85 PathProgramCache]: Analyzing trace with hash -21295972, now seen corresponding path program 154 times [2022-03-20 22:27:03,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:27:03,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895437472] [2022-03-20 22:27:03,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:27:03,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:27:03,909 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:27:03,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901764670] [2022-03-20 22:27:03,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:27:03,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:03,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:27:03,914 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:27:03,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-20 22:27:04,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:27:04,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:27:04,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 1864 conjuncts, 159 conjunts are in the unsatisfiable core [2022-03-20 22:27:04,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:27:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 26646 backedges. 154 proven. 26488 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:27:06,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:27:07,391 INFO L134 CoverageAnalysis]: Checked inductivity of 26646 backedges. 154 proven. 14784 refuted. 0 times theorem prover too weak. 11708 trivial. 0 not checked. [2022-03-20 22:27:07,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:27:07,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895437472] [2022-03-20 22:27:07,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:27:07,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901764670] [2022-03-20 22:27:07,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901764670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:27:07,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:27:07,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 104 [2022-03-20 22:27:07,392 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:27:07,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [395866707] [2022-03-20 22:27:07,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [395866707] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:27:07,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:27:07,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 22:27:07,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200604241] [2022-03-20 22:27:07,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:27:07,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 22:27:07,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:07,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 22:27:07,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:27:07,394 INFO L87 Difference]: Start difference. First operand 713 states and 791 transitions. Second operand has 81 states, 81 states have (on average 6.802469135802469) internal successors, (551), 80 states have internal predecessors, (551), 80 states have call successors, (82), 80 states have call predecessors, (82), 78 states have return successors, (80), 78 states have call predecessors, (80), 79 states have call successors, (80) [2022-03-20 22:27:09,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:27:09,371 INFO L93 Difference]: Finished difference Result 727 states and 806 transitions. [2022-03-20 22:27:09,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-03-20 22:27:09,371 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 6.802469135802469) internal successors, (551), 80 states have internal predecessors, (551), 80 states have call successors, (82), 80 states have call predecessors, (82), 78 states have return successors, (80), 78 states have call predecessors, (80), 79 states have call successors, (80) Word has length 716 [2022-03-20 22:27:09,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:27:09,375 INFO L225 Difference]: With dead ends: 727 [2022-03-20 22:27:09,375 INFO L226 Difference]: Without dead ends: 722 [2022-03-20 22:27:09,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1508 GetRequests, 1328 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3124 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=13087, Invalid=19493, Unknown=0, NotChecked=0, Total=32580 [2022-03-20 22:27:09,393 INFO L913 BasicCegarLoop]: 103 mSDtfsCounter, 352 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:27:09,393 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 698 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:27:09,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-03-20 22:27:09,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 722. [2022-03-20 22:27:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 558 states have (on average 1.1415770609318996) internal successors, (637), 558 states have internal predecessors, (637), 83 states have call successors, (83), 82 states have call predecessors, (83), 80 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2022-03-20 22:27:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 801 transitions. [2022-03-20 22:27:09,438 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 801 transitions. Word has length 716 [2022-03-20 22:27:09,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:27:09,438 INFO L478 AbstractCegarLoop]: Abstraction has 722 states and 801 transitions. [2022-03-20 22:27:09,438 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 6.802469135802469) internal successors, (551), 80 states have internal predecessors, (551), 80 states have call successors, (82), 80 states have call predecessors, (82), 78 states have return successors, (80), 78 states have call predecessors, (80), 79 states have call successors, (80) [2022-03-20 22:27:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 801 transitions. [2022-03-20 22:27:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2022-03-20 22:27:09,442 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:27:09,442 INFO L499 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 78, 78, 78, 78, 78, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:27:09,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-20 22:27:09,647 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:09,647 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:27:09,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:27:09,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1148019286, now seen corresponding path program 155 times [2022-03-20 22:27:09,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:09,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [727187713] [2022-03-20 22:27:09,648 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:27:09,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1148019286, now seen corresponding path program 156 times [2022-03-20 22:27:09,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:27:09,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412850529] [2022-03-20 22:27:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:27:09,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:27:09,658 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:27:09,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1569837005] [2022-03-20 22:27:09,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:27:09,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:09,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:27:09,660 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:27:09,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-20 22:27:10,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2022-03-20 22:27:10,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:27:10,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 161 conjunts are in the unsatisfiable core [2022-03-20 22:27:10,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:27:12,038 INFO L134 CoverageAnalysis]: Checked inductivity of 27343 backedges. 156 proven. 27183 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:27:12,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:27:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 27343 backedges. 156 proven. 15171 refuted. 0 times theorem prover too weak. 12016 trivial. 0 not checked. [2022-03-20 22:27:14,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:27:14,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412850529] [2022-03-20 22:27:14,061 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:27:14,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569837005] [2022-03-20 22:27:14,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569837005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:27:14,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:27:14,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 104 [2022-03-20 22:27:14,061 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:27:14,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [727187713] [2022-03-20 22:27:14,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [727187713] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:27:14,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:27:14,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-20 22:27:14,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352787860] [2022-03-20 22:27:14,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:27:14,062 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-20 22:27:14,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:14,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-20 22:27:14,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:27:14,063 INFO L87 Difference]: Start difference. First operand 722 states and 801 transitions. Second operand has 82 states, 82 states have (on average 6.804878048780488) internal successors, (558), 81 states have internal predecessors, (558), 81 states have call successors, (83), 81 states have call predecessors, (83), 79 states have return successors, (81), 79 states have call predecessors, (81), 80 states have call successors, (81) [2022-03-20 22:27:16,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:27:16,310 INFO L93 Difference]: Finished difference Result 736 states and 816 transitions. [2022-03-20 22:27:16,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-03-20 22:27:16,310 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 6.804878048780488) internal successors, (558), 81 states have internal predecessors, (558), 81 states have call successors, (83), 81 states have call predecessors, (83), 79 states have return successors, (81), 79 states have call predecessors, (81), 80 states have call successors, (81) Word has length 725 [2022-03-20 22:27:16,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:27:16,313 INFO L225 Difference]: With dead ends: 736 [2022-03-20 22:27:16,313 INFO L226 Difference]: Without dead ends: 731 [2022-03-20 22:27:16,315 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1527 GetRequests, 1346 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3201 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=13190, Invalid=19752, Unknown=0, NotChecked=0, Total=32942 [2022-03-20 22:27:16,315 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 325 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:27:16,315 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 712 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:27:16,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-20 22:27:16,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 731. [2022-03-20 22:27:16,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 565 states have (on average 1.1415929203539823) internal successors, (645), 565 states have internal predecessors, (645), 84 states have call successors, (84), 83 states have call predecessors, (84), 81 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-03-20 22:27:16,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 811 transitions. [2022-03-20 22:27:16,356 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 811 transitions. Word has length 725 [2022-03-20 22:27:16,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:27:16,356 INFO L478 AbstractCegarLoop]: Abstraction has 731 states and 811 transitions. [2022-03-20 22:27:16,357 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 6.804878048780488) internal successors, (558), 81 states have internal predecessors, (558), 81 states have call successors, (83), 81 states have call predecessors, (83), 79 states have return successors, (81), 79 states have call predecessors, (81), 80 states have call successors, (81) [2022-03-20 22:27:16,357 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 811 transitions. [2022-03-20 22:27:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 735 [2022-03-20 22:27:16,361 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:27:16,361 INFO L499 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 79, 79, 79, 79, 79, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:27:16,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-20 22:27:16,569 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:16,569 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:27:16,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:27:16,569 INFO L85 PathProgramCache]: Analyzing trace with hash 652664284, now seen corresponding path program 157 times [2022-03-20 22:27:16,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:16,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1819067352] [2022-03-20 22:27:16,570 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:27:16,570 INFO L85 PathProgramCache]: Analyzing trace with hash 652664284, now seen corresponding path program 158 times [2022-03-20 22:27:16,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:27:16,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727076321] [2022-03-20 22:27:16,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:27:16,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:27:16,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:27:16,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246922150] [2022-03-20 22:27:16,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:27:16,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:16,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:27:16,581 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:27:16,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-20 22:27:16,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:27:16,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:27:16,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 1910 conjuncts, 163 conjunts are in the unsatisfiable core [2022-03-20 22:27:16,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:27:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 28049 backedges. 158 proven. 27887 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:27:19,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:27:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 28049 backedges. 158 proven. 15563 refuted. 0 times theorem prover too weak. 12328 trivial. 0 not checked. [2022-03-20 22:27:21,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:27:21,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727076321] [2022-03-20 22:27:21,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:27:21,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246922150] [2022-03-20 22:27:21,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246922150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:27:21,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:27:21,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 104 [2022-03-20 22:27:21,898 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:27:21,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1819067352] [2022-03-20 22:27:21,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1819067352] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:27:21,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:27:21,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 22:27:21,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418698910] [2022-03-20 22:27:21,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:27:21,899 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-20 22:27:21,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:21,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-20 22:27:21,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:27:21,901 INFO L87 Difference]: Start difference. First operand 731 states and 811 transitions. Second operand has 83 states, 83 states have (on average 6.807228915662651) internal successors, (565), 82 states have internal predecessors, (565), 82 states have call successors, (84), 82 states have call predecessors, (84), 80 states have return successors, (82), 80 states have call predecessors, (82), 81 states have call successors, (82) [2022-03-20 22:27:24,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:27:24,174 INFO L93 Difference]: Finished difference Result 745 states and 826 transitions. [2022-03-20 22:27:24,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-03-20 22:27:24,175 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 6.807228915662651) internal successors, (565), 82 states have internal predecessors, (565), 82 states have call successors, (84), 82 states have call predecessors, (84), 80 states have return successors, (82), 80 states have call predecessors, (82), 81 states have call successors, (82) Word has length 734 [2022-03-20 22:27:24,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:27:24,177 INFO L225 Difference]: With dead ends: 745 [2022-03-20 22:27:24,177 INFO L226 Difference]: Without dead ends: 740 [2022-03-20 22:27:24,179 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1546 GetRequests, 1364 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3279 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=13293, Invalid=20013, Unknown=0, NotChecked=0, Total=33306 [2022-03-20 22:27:24,179 INFO L913 BasicCegarLoop]: 105 mSDtfsCounter, 362 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 22:27:24,179 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 726 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 22:27:24,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-03-20 22:27:24,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 740. [2022-03-20 22:27:24,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 572 states have (on average 1.1416083916083917) internal successors, (653), 572 states have internal predecessors, (653), 85 states have call successors, (85), 84 states have call predecessors, (85), 82 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-03-20 22:27:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 821 transitions. [2022-03-20 22:27:24,219 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 821 transitions. Word has length 734 [2022-03-20 22:27:24,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:27:24,220 INFO L478 AbstractCegarLoop]: Abstraction has 740 states and 821 transitions. [2022-03-20 22:27:24,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 6.807228915662651) internal successors, (565), 82 states have internal predecessors, (565), 82 states have call successors, (84), 82 states have call predecessors, (84), 80 states have return successors, (82), 80 states have call predecessors, (82), 81 states have call successors, (82) [2022-03-20 22:27:24,220 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 821 transitions. [2022-03-20 22:27:24,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 744 [2022-03-20 22:27:24,224 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:27:24,225 INFO L499 BasicCegarLoop]: trace histogram [81, 81, 80, 80, 80, 80, 80, 80, 80, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:27:24,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-20 22:27:24,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-03-20 22:27:24,439 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:27:24,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:27:24,440 INFO L85 PathProgramCache]: Analyzing trace with hash 609810710, now seen corresponding path program 159 times [2022-03-20 22:27:24,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:24,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1875631753] [2022-03-20 22:27:24,441 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:27:24,441 INFO L85 PathProgramCache]: Analyzing trace with hash 609810710, now seen corresponding path program 160 times [2022-03-20 22:27:24,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:27:24,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736212867] [2022-03-20 22:27:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:27:24,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:27:24,476 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:27:24,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578782206] [2022-03-20 22:27:24,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:27:24,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:24,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:27:24,478 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:27:24,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-20 22:27:24,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:27:24,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:27:24,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 1933 conjuncts, 165 conjunts are in the unsatisfiable core [2022-03-20 22:27:24,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:27:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 28764 backedges. 160 proven. 28600 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:27:27,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:27:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 28764 backedges. 160 proven. 15960 refuted. 0 times theorem prover too weak. 12644 trivial. 0 not checked. [2022-03-20 22:27:29,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:27:29,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736212867] [2022-03-20 22:27:29,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:27:29,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578782206] [2022-03-20 22:27:29,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578782206] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:27:29,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:27:29,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 104 [2022-03-20 22:27:29,729 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:27:29,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1875631753] [2022-03-20 22:27:29,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1875631753] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:27:29,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:27:29,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-20 22:27:29,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110822299] [2022-03-20 22:27:29,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:27:29,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 22:27:29,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:29,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 22:27:29,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:27:29,731 INFO L87 Difference]: Start difference. First operand 740 states and 821 transitions. Second operand has 84 states, 84 states have (on average 6.809523809523809) internal successors, (572), 83 states have internal predecessors, (572), 83 states have call successors, (85), 83 states have call predecessors, (85), 81 states have return successors, (83), 81 states have call predecessors, (83), 82 states have call successors, (83) [2022-03-20 22:27:32,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:27:32,463 INFO L93 Difference]: Finished difference Result 754 states and 836 transitions. [2022-03-20 22:27:32,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-03-20 22:27:32,463 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 6.809523809523809) internal successors, (572), 83 states have internal predecessors, (572), 83 states have call successors, (85), 83 states have call predecessors, (85), 81 states have return successors, (83), 81 states have call predecessors, (83), 82 states have call successors, (83) Word has length 743 [2022-03-20 22:27:32,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:27:32,465 INFO L225 Difference]: With dead ends: 754 [2022-03-20 22:27:32,465 INFO L226 Difference]: Without dead ends: 749 [2022-03-20 22:27:32,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1565 GetRequests, 1382 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3358 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=13396, Invalid=20276, Unknown=0, NotChecked=0, Total=33672 [2022-03-20 22:27:32,468 INFO L913 BasicCegarLoop]: 106 mSDtfsCounter, 359 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 22:27:32,468 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 710 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 22:27:32,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-03-20 22:27:32,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-03-20 22:27:32,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 579 states have (on average 1.1416234887737478) internal successors, (661), 579 states have internal predecessors, (661), 86 states have call successors, (86), 85 states have call predecessors, (86), 83 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2022-03-20 22:27:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 831 transitions. [2022-03-20 22:27:32,517 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 831 transitions. Word has length 743 [2022-03-20 22:27:32,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:27:32,518 INFO L478 AbstractCegarLoop]: Abstraction has 749 states and 831 transitions. [2022-03-20 22:27:32,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 6.809523809523809) internal successors, (572), 83 states have internal predecessors, (572), 83 states have call successors, (85), 83 states have call predecessors, (85), 81 states have return successors, (83), 81 states have call predecessors, (83), 82 states have call successors, (83) [2022-03-20 22:27:32,518 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 831 transitions. [2022-03-20 22:27:32,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2022-03-20 22:27:32,522 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:27:32,522 INFO L499 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 81, 81, 81, 81, 81, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:27:32,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-20 22:27:32,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:32,735 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:27:32,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:27:32,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1052303132, now seen corresponding path program 161 times [2022-03-20 22:27:32,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:32,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1638013869] [2022-03-20 22:27:32,739 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:27:32,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1052303132, now seen corresponding path program 162 times [2022-03-20 22:27:32,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:27:32,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738320875] [2022-03-20 22:27:32,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:27:32,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:27:32,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:27:32,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389519570] [2022-03-20 22:27:32,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:27:32,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:32,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:27:32,751 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:27:32,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-20 22:27:33,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2022-03-20 22:27:33,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:27:33,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 167 conjunts are in the unsatisfiable core [2022-03-20 22:27:33,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:27:35,576 INFO L134 CoverageAnalysis]: Checked inductivity of 29488 backedges. 162 proven. 29322 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:27:35,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:27:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 29488 backedges. 162 proven. 16362 refuted. 0 times theorem prover too weak. 12964 trivial. 0 not checked. [2022-03-20 22:27:37,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:27:37,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738320875] [2022-03-20 22:27:37,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:27:37,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389519570] [2022-03-20 22:27:37,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389519570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:27:37,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:27:37,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 104 [2022-03-20 22:27:37,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:27:37,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1638013869] [2022-03-20 22:27:37,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1638013869] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:27:37,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:27:37,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 22:27:37,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621314565] [2022-03-20 22:27:37,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:27:37,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-20 22:27:37,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:37,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-20 22:27:37,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:27:37,440 INFO L87 Difference]: Start difference. First operand 749 states and 831 transitions. Second operand has 85 states, 85 states have (on average 6.811764705882353) internal successors, (579), 84 states have internal predecessors, (579), 84 states have call successors, (86), 84 states have call predecessors, (86), 82 states have return successors, (84), 82 states have call predecessors, (84), 83 states have call successors, (84) [2022-03-20 22:27:39,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:27:39,484 INFO L93 Difference]: Finished difference Result 763 states and 846 transitions. [2022-03-20 22:27:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-03-20 22:27:39,485 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 6.811764705882353) internal successors, (579), 84 states have internal predecessors, (579), 84 states have call successors, (86), 84 states have call predecessors, (86), 82 states have return successors, (84), 82 states have call predecessors, (84), 83 states have call successors, (84) Word has length 752 [2022-03-20 22:27:39,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:27:39,487 INFO L225 Difference]: With dead ends: 763 [2022-03-20 22:27:39,487 INFO L226 Difference]: Without dead ends: 758 [2022-03-20 22:27:39,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1584 GetRequests, 1400 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3438 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=13499, Invalid=20541, Unknown=0, NotChecked=0, Total=34040 [2022-03-20 22:27:39,489 INFO L913 BasicCegarLoop]: 107 mSDtfsCounter, 392 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:27:39,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 724 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:27:39,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2022-03-20 22:27:39,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 758. [2022-03-20 22:27:39,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 586 states have (on average 1.1416382252559727) internal successors, (669), 586 states have internal predecessors, (669), 87 states have call successors, (87), 86 states have call predecessors, (87), 84 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2022-03-20 22:27:39,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 841 transitions. [2022-03-20 22:27:39,528 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 841 transitions. Word has length 752 [2022-03-20 22:27:39,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:27:39,529 INFO L478 AbstractCegarLoop]: Abstraction has 758 states and 841 transitions. [2022-03-20 22:27:39,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 6.811764705882353) internal successors, (579), 84 states have internal predecessors, (579), 84 states have call successors, (86), 84 states have call predecessors, (86), 82 states have return successors, (84), 82 states have call predecessors, (84), 83 states have call successors, (84) [2022-03-20 22:27:39,529 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 841 transitions. [2022-03-20 22:27:39,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2022-03-20 22:27:39,533 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:27:39,534 INFO L499 BasicCegarLoop]: trace histogram [83, 83, 82, 82, 82, 82, 82, 82, 82, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:27:39,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-20 22:27:39,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:39,742 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:27:39,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:27:39,742 INFO L85 PathProgramCache]: Analyzing trace with hash 345268182, now seen corresponding path program 163 times [2022-03-20 22:27:39,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:39,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1460498041] [2022-03-20 22:27:39,743 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:27:39,743 INFO L85 PathProgramCache]: Analyzing trace with hash 345268182, now seen corresponding path program 164 times [2022-03-20 22:27:39,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:27:39,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358694257] [2022-03-20 22:27:39,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:27:39,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:27:39,753 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:27:39,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588045517] [2022-03-20 22:27:39,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:27:39,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:39,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:27:39,755 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:27:39,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-20 22:27:39,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:27:39,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:27:39,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 169 conjunts are in the unsatisfiable core [2022-03-20 22:27:39,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:27:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30221 backedges. 164 proven. 30053 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:27:41,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:27:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 30221 backedges. 164 proven. 16769 refuted. 0 times theorem prover too weak. 13288 trivial. 0 not checked. [2022-03-20 22:27:42,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:27:42,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358694257] [2022-03-20 22:27:42,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:27:42,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588045517] [2022-03-20 22:27:42,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588045517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:27:42,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:27:42,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 104 [2022-03-20 22:27:42,989 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:27:42,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1460498041] [2022-03-20 22:27:42,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1460498041] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:27:42,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:27:42,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-20 22:27:42,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256609418] [2022-03-20 22:27:42,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:27:42,990 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 22:27:42,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:42,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 22:27:42,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:27:42,993 INFO L87 Difference]: Start difference. First operand 758 states and 841 transitions. Second operand has 86 states, 86 states have (on average 6.813953488372093) internal successors, (586), 85 states have internal predecessors, (586), 85 states have call successors, (87), 85 states have call predecessors, (87), 83 states have return successors, (85), 83 states have call predecessors, (85), 84 states have call successors, (85) [2022-03-20 22:27:45,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:27:45,315 INFO L93 Difference]: Finished difference Result 772 states and 856 transitions. [2022-03-20 22:27:45,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-03-20 22:27:45,315 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 6.813953488372093) internal successors, (586), 85 states have internal predecessors, (586), 85 states have call successors, (87), 85 states have call predecessors, (87), 83 states have return successors, (85), 83 states have call predecessors, (85), 84 states have call successors, (85) Word has length 761 [2022-03-20 22:27:45,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:27:45,317 INFO L225 Difference]: With dead ends: 772 [2022-03-20 22:27:45,317 INFO L226 Difference]: Without dead ends: 767 [2022-03-20 22:27:45,319 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1603 GetRequests, 1418 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3519 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=13602, Invalid=20808, Unknown=0, NotChecked=0, Total=34410 [2022-03-20 22:27:45,319 INFO L913 BasicCegarLoop]: 108 mSDtfsCounter, 303 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:27:45,319 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 768 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:27:45,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-03-20 22:27:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2022-03-20 22:27:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 593 states have (on average 1.1416526138279932) internal successors, (677), 593 states have internal predecessors, (677), 88 states have call successors, (88), 87 states have call predecessors, (88), 85 states have return successors, (86), 86 states have call predecessors, (86), 86 states have call successors, (86) [2022-03-20 22:27:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 851 transitions. [2022-03-20 22:27:45,358 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 851 transitions. Word has length 761 [2022-03-20 22:27:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:27:45,359 INFO L478 AbstractCegarLoop]: Abstraction has 767 states and 851 transitions. [2022-03-20 22:27:45,359 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 6.813953488372093) internal successors, (586), 85 states have internal predecessors, (586), 85 states have call successors, (87), 85 states have call predecessors, (87), 83 states have return successors, (85), 83 states have call predecessors, (85), 84 states have call successors, (85) [2022-03-20 22:27:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 851 transitions. [2022-03-20 22:27:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2022-03-20 22:27:45,364 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:27:45,364 INFO L499 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 83, 83, 83, 83, 83, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:27:45,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-20 22:27:45,582 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:45,582 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:27:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:27:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash -620425124, now seen corresponding path program 165 times [2022-03-20 22:27:45,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:45,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1917864713] [2022-03-20 22:27:45,583 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:27:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash -620425124, now seen corresponding path program 166 times [2022-03-20 22:27:45,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:27:45,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636732424] [2022-03-20 22:27:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:27:45,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:27:45,594 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:27:45,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612106474] [2022-03-20 22:27:45,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:27:45,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:45,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:27:45,612 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:27:45,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-20 22:27:45,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:27:45,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:27:45,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 2002 conjuncts, 171 conjunts are in the unsatisfiable core [2022-03-20 22:27:45,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:27:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 30963 backedges. 166 proven. 30793 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:27:48,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:27:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 30963 backedges. 166 proven. 17181 refuted. 0 times theorem prover too weak. 13616 trivial. 0 not checked. [2022-03-20 22:27:49,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:27:49,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636732424] [2022-03-20 22:27:49,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:27:49,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612106474] [2022-03-20 22:27:49,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612106474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:27:49,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:27:49,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 104 [2022-03-20 22:27:49,222 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:27:49,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1917864713] [2022-03-20 22:27:49,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1917864713] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:27:49,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:27:49,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 22:27:49,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292778723] [2022-03-20 22:27:49,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:27:49,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 22:27:49,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:49,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 22:27:49,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:27:49,224 INFO L87 Difference]: Start difference. First operand 767 states and 851 transitions. Second operand has 87 states, 87 states have (on average 6.816091954022989) internal successors, (593), 86 states have internal predecessors, (593), 86 states have call successors, (88), 86 states have call predecessors, (88), 84 states have return successors, (86), 84 states have call predecessors, (86), 85 states have call successors, (86) [2022-03-20 22:27:51,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:27:51,506 INFO L93 Difference]: Finished difference Result 781 states and 866 transitions. [2022-03-20 22:27:51,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-03-20 22:27:51,506 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 6.816091954022989) internal successors, (593), 86 states have internal predecessors, (593), 86 states have call successors, (88), 86 states have call predecessors, (88), 84 states have return successors, (86), 84 states have call predecessors, (86), 85 states have call successors, (86) Word has length 770 [2022-03-20 22:27:51,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:27:51,514 INFO L225 Difference]: With dead ends: 781 [2022-03-20 22:27:51,514 INFO L226 Difference]: Without dead ends: 776 [2022-03-20 22:27:51,517 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1622 GetRequests, 1436 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3601 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=13705, Invalid=21077, Unknown=0, NotChecked=0, Total=34782 [2022-03-20 22:27:51,517 INFO L913 BasicCegarLoop]: 109 mSDtfsCounter, 315 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:27:51,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 764 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:27:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-03-20 22:27:51,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 776. [2022-03-20 22:27:51,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 600 states have (on average 1.1416666666666666) internal successors, (685), 600 states have internal predecessors, (685), 89 states have call successors, (89), 88 states have call predecessors, (89), 86 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-20 22:27:51,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 861 transitions. [2022-03-20 22:27:51,574 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 861 transitions. Word has length 770 [2022-03-20 22:27:51,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:27:51,575 INFO L478 AbstractCegarLoop]: Abstraction has 776 states and 861 transitions. [2022-03-20 22:27:51,575 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 6.816091954022989) internal successors, (593), 86 states have internal predecessors, (593), 86 states have call successors, (88), 86 states have call predecessors, (88), 84 states have return successors, (86), 84 states have call predecessors, (86), 85 states have call successors, (86) [2022-03-20 22:27:51,575 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 861 transitions. [2022-03-20 22:27:51,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2022-03-20 22:27:51,580 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:27:51,580 INFO L499 BasicCegarLoop]: trace histogram [85, 85, 84, 84, 84, 84, 84, 84, 84, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:27:51,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-20 22:27:51,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:51,796 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:27:51,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:27:51,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1362389354, now seen corresponding path program 167 times [2022-03-20 22:27:51,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:51,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1361257350] [2022-03-20 22:27:51,797 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:27:51,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1362389354, now seen corresponding path program 168 times [2022-03-20 22:27:51,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:27:51,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759056911] [2022-03-20 22:27:51,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:27:51,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:27:51,811 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:27:51,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684209176] [2022-03-20 22:27:51,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:27:51,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:51,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:27:51,813 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:27:51,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-20 22:27:52,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2022-03-20 22:27:52,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:27:52,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 2025 conjuncts, 173 conjunts are in the unsatisfiable core [2022-03-20 22:27:52,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:27:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 31714 backedges. 168 proven. 31542 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:27:55,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:27:57,074 INFO L134 CoverageAnalysis]: Checked inductivity of 31714 backedges. 168 proven. 17598 refuted. 0 times theorem prover too weak. 13948 trivial. 0 not checked. [2022-03-20 22:27:57,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:27:57,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759056911] [2022-03-20 22:27:57,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:27:57,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684209176] [2022-03-20 22:27:57,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684209176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:27:57,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:27:57,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 104 [2022-03-20 22:27:57,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:27:57,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1361257350] [2022-03-20 22:27:57,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1361257350] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:27:57,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:27:57,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-20 22:27:57,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677490863] [2022-03-20 22:27:57,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:27:57,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 22:27:57,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:57,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 22:27:57,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:27:57,077 INFO L87 Difference]: Start difference. First operand 776 states and 861 transitions. Second operand has 88 states, 88 states have (on average 6.818181818181818) internal successors, (600), 87 states have internal predecessors, (600), 87 states have call successors, (89), 87 states have call predecessors, (89), 85 states have return successors, (87), 85 states have call predecessors, (87), 86 states have call successors, (87) [2022-03-20 22:27:59,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:27:59,327 INFO L93 Difference]: Finished difference Result 790 states and 876 transitions. [2022-03-20 22:27:59,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-03-20 22:27:59,327 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 6.818181818181818) internal successors, (600), 87 states have internal predecessors, (600), 87 states have call successors, (89), 87 states have call predecessors, (89), 85 states have return successors, (87), 85 states have call predecessors, (87), 86 states have call successors, (87) Word has length 779 [2022-03-20 22:27:59,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:27:59,329 INFO L225 Difference]: With dead ends: 790 [2022-03-20 22:27:59,329 INFO L226 Difference]: Without dead ends: 785 [2022-03-20 22:27:59,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1641 GetRequests, 1454 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3684 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=13808, Invalid=21348, Unknown=0, NotChecked=0, Total=35156 [2022-03-20 22:27:59,356 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 314 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:27:59,357 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 766 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:27:59,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-03-20 22:27:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 785. [2022-03-20 22:27:59,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 607 states have (on average 1.14168039538715) internal successors, (693), 607 states have internal predecessors, (693), 90 states have call successors, (90), 89 states have call predecessors, (90), 87 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2022-03-20 22:27:59,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 871 transitions. [2022-03-20 22:27:59,398 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 871 transitions. Word has length 779 [2022-03-20 22:27:59,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:27:59,398 INFO L478 AbstractCegarLoop]: Abstraction has 785 states and 871 transitions. [2022-03-20 22:27:59,398 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 6.818181818181818) internal successors, (600), 87 states have internal predecessors, (600), 87 states have call successors, (89), 87 states have call predecessors, (89), 85 states have return successors, (87), 85 states have call predecessors, (87), 86 states have call successors, (87) [2022-03-20 22:27:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 871 transitions. [2022-03-20 22:27:59,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 789 [2022-03-20 22:27:59,403 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:27:59,403 INFO L499 BasicCegarLoop]: trace histogram [86, 86, 85, 85, 85, 85, 85, 85, 85, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:27:59,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-20 22:27:59,612 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:59,612 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:27:59,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:27:59,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2086702692, now seen corresponding path program 169 times [2022-03-20 22:27:59,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:27:59,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [839297475] [2022-03-20 22:27:59,613 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:27:59,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2086702692, now seen corresponding path program 170 times [2022-03-20 22:27:59,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:27:59,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195315298] [2022-03-20 22:27:59,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:27:59,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:27:59,625 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:27:59,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882401189] [2022-03-20 22:27:59,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:27:59,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:27:59,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:27:59,626 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:27:59,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-20 22:27:59,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:27:59,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:27:59,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 2048 conjuncts, 175 conjunts are in the unsatisfiable core [2022-03-20 22:27:59,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:28:01,898 INFO L134 CoverageAnalysis]: Checked inductivity of 32474 backedges. 170 proven. 32300 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:28:01,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:28:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 32474 backedges. 170 proven. 18020 refuted. 0 times theorem prover too weak. 14284 trivial. 0 not checked. [2022-03-20 22:28:03,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:28:03,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195315298] [2022-03-20 22:28:03,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:28:03,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882401189] [2022-03-20 22:28:03,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882401189] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:28:03,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:28:03,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 104 [2022-03-20 22:28:03,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:28:03,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [839297475] [2022-03-20 22:28:03,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [839297475] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:28:03,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:28:03,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-20 22:28:03,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42231735] [2022-03-20 22:28:03,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:28:03,004 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-20 22:28:03,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:28:03,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-20 22:28:03,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:28:03,006 INFO L87 Difference]: Start difference. First operand 785 states and 871 transitions. Second operand has 89 states, 89 states have (on average 6.820224719101123) internal successors, (607), 88 states have internal predecessors, (607), 88 states have call successors, (90), 88 states have call predecessors, (90), 86 states have return successors, (88), 86 states have call predecessors, (88), 87 states have call successors, (88) [2022-03-20 22:28:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:28:05,434 INFO L93 Difference]: Finished difference Result 799 states and 886 transitions. [2022-03-20 22:28:05,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-03-20 22:28:05,434 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 6.820224719101123) internal successors, (607), 88 states have internal predecessors, (607), 88 states have call successors, (90), 88 states have call predecessors, (90), 86 states have return successors, (88), 86 states have call predecessors, (88), 87 states have call successors, (88) Word has length 788 [2022-03-20 22:28:05,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:28:05,436 INFO L225 Difference]: With dead ends: 799 [2022-03-20 22:28:05,436 INFO L226 Difference]: Without dead ends: 794 [2022-03-20 22:28:05,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1660 GetRequests, 1472 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3768 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=13911, Invalid=21621, Unknown=0, NotChecked=0, Total=35532 [2022-03-20 22:28:05,438 INFO L913 BasicCegarLoop]: 111 mSDtfsCounter, 341 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:28:05,438 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 768 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:28:05,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-03-20 22:28:05,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 794. [2022-03-20 22:28:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 614 states have (on average 1.1416938110749186) internal successors, (701), 614 states have internal predecessors, (701), 91 states have call successors, (91), 90 states have call predecessors, (91), 88 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2022-03-20 22:28:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 881 transitions. [2022-03-20 22:28:05,488 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 881 transitions. Word has length 788 [2022-03-20 22:28:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:28:05,488 INFO L478 AbstractCegarLoop]: Abstraction has 794 states and 881 transitions. [2022-03-20 22:28:05,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 6.820224719101123) internal successors, (607), 88 states have internal predecessors, (607), 88 states have call successors, (90), 88 states have call predecessors, (90), 86 states have return successors, (88), 86 states have call predecessors, (88), 87 states have call successors, (88) [2022-03-20 22:28:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 881 transitions. [2022-03-20 22:28:05,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2022-03-20 22:28:05,493 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:28:05,494 INFO L499 BasicCegarLoop]: trace histogram [87, 87, 86, 86, 86, 86, 86, 86, 86, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:28:05,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-20 22:28:05,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-20 22:28:05,708 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:28:05,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:28:05,708 INFO L85 PathProgramCache]: Analyzing trace with hash -106259114, now seen corresponding path program 171 times [2022-03-20 22:28:05,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:28:05,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2034753492] [2022-03-20 22:28:05,708 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:28:05,709 INFO L85 PathProgramCache]: Analyzing trace with hash -106259114, now seen corresponding path program 172 times [2022-03-20 22:28:05,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:28:05,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811993578] [2022-03-20 22:28:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:28:05,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:28:05,725 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:28:05,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574290216] [2022-03-20 22:28:05,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:28:05,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:28:05,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:28:05,728 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:28:05,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-20 22:28:06,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:28:06,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:28:06,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 2071 conjuncts, 177 conjunts are in the unsatisfiable core [2022-03-20 22:28:06,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:28:08,217 INFO L134 CoverageAnalysis]: Checked inductivity of 33243 backedges. 172 proven. 33067 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:28:08,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:28:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 33243 backedges. 172 proven. 18447 refuted. 0 times theorem prover too weak. 14624 trivial. 0 not checked. [2022-03-20 22:28:09,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:28:09,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811993578] [2022-03-20 22:28:09,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:28:09,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574290216] [2022-03-20 22:28:09,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574290216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:28:09,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:28:09,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 104 [2022-03-20 22:28:09,339 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:28:09,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2034753492] [2022-03-20 22:28:09,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2034753492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:28:09,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:28:09,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-20 22:28:09,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192507217] [2022-03-20 22:28:09,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:28:09,339 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-20 22:28:09,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:28:09,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-20 22:28:09,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:28:09,341 INFO L87 Difference]: Start difference. First operand 794 states and 881 transitions. Second operand has 90 states, 90 states have (on average 6.822222222222222) internal successors, (614), 89 states have internal predecessors, (614), 89 states have call successors, (91), 89 states have call predecessors, (91), 87 states have return successors, (89), 87 states have call predecessors, (89), 88 states have call successors, (89) [2022-03-20 22:28:11,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:28:11,680 INFO L93 Difference]: Finished difference Result 808 states and 896 transitions. [2022-03-20 22:28:11,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-03-20 22:28:11,681 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 6.822222222222222) internal successors, (614), 89 states have internal predecessors, (614), 89 states have call successors, (91), 89 states have call predecessors, (91), 87 states have return successors, (89), 87 states have call predecessors, (89), 88 states have call successors, (89) Word has length 797 [2022-03-20 22:28:11,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:28:11,682 INFO L225 Difference]: With dead ends: 808 [2022-03-20 22:28:11,682 INFO L226 Difference]: Without dead ends: 803 [2022-03-20 22:28:11,685 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1679 GetRequests, 1490 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3853 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=14014, Invalid=21896, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 22:28:11,685 INFO L913 BasicCegarLoop]: 112 mSDtfsCounter, 390 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:28:11,685 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 764 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:28:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-03-20 22:28:11,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 803. [2022-03-20 22:28:11,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 621 states have (on average 1.14170692431562) internal successors, (709), 621 states have internal predecessors, (709), 92 states have call successors, (92), 91 states have call predecessors, (92), 89 states have return successors, (90), 90 states have call predecessors, (90), 90 states have call successors, (90) [2022-03-20 22:28:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 891 transitions. [2022-03-20 22:28:11,741 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 891 transitions. Word has length 797 [2022-03-20 22:28:11,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:28:11,741 INFO L478 AbstractCegarLoop]: Abstraction has 803 states and 891 transitions. [2022-03-20 22:28:11,741 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 6.822222222222222) internal successors, (614), 89 states have internal predecessors, (614), 89 states have call successors, (91), 89 states have call predecessors, (91), 87 states have return successors, (89), 87 states have call predecessors, (89), 88 states have call successors, (89) [2022-03-20 22:28:11,742 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 891 transitions. [2022-03-20 22:28:11,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 807 [2022-03-20 22:28:11,746 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:28:11,747 INFO L499 BasicCegarLoop]: trace histogram [88, 88, 87, 87, 87, 87, 87, 87, 87, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:28:11,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-20 22:28:11,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-20 22:28:11,955 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:28:11,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:28:11,956 INFO L85 PathProgramCache]: Analyzing trace with hash -212073764, now seen corresponding path program 173 times [2022-03-20 22:28:11,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:28:11,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1079554823] [2022-03-20 22:28:11,956 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:28:11,956 INFO L85 PathProgramCache]: Analyzing trace with hash -212073764, now seen corresponding path program 174 times [2022-03-20 22:28:11,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:28:11,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033899856] [2022-03-20 22:28:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:28:11,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:28:11,967 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:28:11,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324159207] [2022-03-20 22:28:11,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:28:11,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:28:11,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:28:11,968 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:28:11,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-20 22:28:12,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 88 check-sat command(s) [2022-03-20 22:28:12,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:28:12,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 2094 conjuncts, 179 conjunts are in the unsatisfiable core [2022-03-20 22:28:12,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:28:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 34021 backedges. 174 proven. 33843 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:28:15,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:28:16,062 INFO L134 CoverageAnalysis]: Checked inductivity of 34021 backedges. 174 proven. 18879 refuted. 0 times theorem prover too weak. 14968 trivial. 0 not checked. [2022-03-20 22:28:16,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:28:16,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033899856] [2022-03-20 22:28:16,063 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:28:16,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324159207] [2022-03-20 22:28:16,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324159207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:28:16,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:28:16,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 104 [2022-03-20 22:28:16,063 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:28:16,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1079554823] [2022-03-20 22:28:16,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1079554823] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:28:16,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:28:16,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-20 22:28:16,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014647558] [2022-03-20 22:28:16,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:28:16,064 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-20 22:28:16,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:28:16,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-20 22:28:16,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:28:16,066 INFO L87 Difference]: Start difference. First operand 803 states and 891 transitions. Second operand has 91 states, 91 states have (on average 6.824175824175824) internal successors, (621), 90 states have internal predecessors, (621), 90 states have call successors, (92), 90 states have call predecessors, (92), 88 states have return successors, (90), 88 states have call predecessors, (90), 89 states have call successors, (90) [2022-03-20 22:28:18,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:28:18,524 INFO L93 Difference]: Finished difference Result 817 states and 906 transitions. [2022-03-20 22:28:18,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2022-03-20 22:28:18,524 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 6.824175824175824) internal successors, (621), 90 states have internal predecessors, (621), 90 states have call successors, (92), 90 states have call predecessors, (92), 88 states have return successors, (90), 88 states have call predecessors, (90), 89 states have call successors, (90) Word has length 806 [2022-03-20 22:28:18,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:28:18,527 INFO L225 Difference]: With dead ends: 817 [2022-03-20 22:28:18,527 INFO L226 Difference]: Without dead ends: 812 [2022-03-20 22:28:18,529 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1698 GetRequests, 1508 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3939 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=14117, Invalid=22173, Unknown=0, NotChecked=0, Total=36290 [2022-03-20 22:28:18,530 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 341 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:28:18,530 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 784 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:28:18,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-03-20 22:28:18,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2022-03-20 22:28:18,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 628 states have (on average 1.14171974522293) internal successors, (717), 628 states have internal predecessors, (717), 93 states have call successors, (93), 92 states have call predecessors, (93), 90 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-03-20 22:28:18,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 901 transitions. [2022-03-20 22:28:18,573 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 901 transitions. Word has length 806 [2022-03-20 22:28:18,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:28:18,574 INFO L478 AbstractCegarLoop]: Abstraction has 812 states and 901 transitions. [2022-03-20 22:28:18,574 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 6.824175824175824) internal successors, (621), 90 states have internal predecessors, (621), 90 states have call successors, (92), 90 states have call predecessors, (92), 88 states have return successors, (90), 88 states have call predecessors, (90), 89 states have call successors, (90) [2022-03-20 22:28:18,574 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 901 transitions. [2022-03-20 22:28:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 816 [2022-03-20 22:28:18,579 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:28:18,579 INFO L499 BasicCegarLoop]: trace histogram [89, 89, 88, 88, 88, 88, 88, 88, 88, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:28:18,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-20 22:28:18,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:28:18,787 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:28:18,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:28:18,787 INFO L85 PathProgramCache]: Analyzing trace with hash 685601814, now seen corresponding path program 175 times [2022-03-20 22:28:18,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:28:18,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [853798092] [2022-03-20 22:28:18,788 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:28:18,788 INFO L85 PathProgramCache]: Analyzing trace with hash 685601814, now seen corresponding path program 176 times [2022-03-20 22:28:18,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:28:18,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293562564] [2022-03-20 22:28:18,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:28:18,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:28:18,799 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:28:18,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252585890] [2022-03-20 22:28:18,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:28:18,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:28:18,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:28:18,800 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:28:18,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-20 22:28:19,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:28:19,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:28:19,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 2117 conjuncts, 181 conjunts are in the unsatisfiable core [2022-03-20 22:28:19,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:28:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 34808 backedges. 176 proven. 34628 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:28:21,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:28:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 34808 backedges. 176 proven. 19316 refuted. 0 times theorem prover too weak. 15316 trivial. 0 not checked. [2022-03-20 22:28:22,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:28:22,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293562564] [2022-03-20 22:28:22,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:28:22,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252585890] [2022-03-20 22:28:22,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252585890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:28:22,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:28:22,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 104 [2022-03-20 22:28:22,297 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:28:22,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [853798092] [2022-03-20 22:28:22,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [853798092] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:28:22,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:28:22,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-20 22:28:22,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962394818] [2022-03-20 22:28:22,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:28:22,298 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-20 22:28:22,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:28:22,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-20 22:28:22,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:28:22,300 INFO L87 Difference]: Start difference. First operand 812 states and 901 transitions. Second operand has 92 states, 92 states have (on average 6.826086956521739) internal successors, (628), 91 states have internal predecessors, (628), 91 states have call successors, (93), 91 states have call predecessors, (93), 89 states have return successors, (91), 89 states have call predecessors, (91), 90 states have call successors, (91) [2022-03-20 22:28:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:28:25,638 INFO L93 Difference]: Finished difference Result 826 states and 916 transitions. [2022-03-20 22:28:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-03-20 22:28:25,639 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 6.826086956521739) internal successors, (628), 91 states have internal predecessors, (628), 91 states have call successors, (93), 91 states have call predecessors, (93), 89 states have return successors, (91), 89 states have call predecessors, (91), 90 states have call successors, (91) Word has length 815 [2022-03-20 22:28:25,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:28:25,641 INFO L225 Difference]: With dead ends: 826 [2022-03-20 22:28:25,641 INFO L226 Difference]: Without dead ends: 821 [2022-03-20 22:28:25,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1717 GetRequests, 1526 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4026 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=14220, Invalid=22452, Unknown=0, NotChecked=0, Total=36672 [2022-03-20 22:28:25,643 INFO L913 BasicCegarLoop]: 114 mSDtfsCounter, 303 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 22:28:25,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 810 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 22:28:25,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-03-20 22:28:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 821. [2022-03-20 22:28:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 635 states have (on average 1.141732283464567) internal successors, (725), 635 states have internal predecessors, (725), 94 states have call successors, (94), 93 states have call predecessors, (94), 91 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-03-20 22:28:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 911 transitions. [2022-03-20 22:28:25,685 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 911 transitions. Word has length 815 [2022-03-20 22:28:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:28:25,686 INFO L478 AbstractCegarLoop]: Abstraction has 821 states and 911 transitions. [2022-03-20 22:28:25,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 6.826086956521739) internal successors, (628), 91 states have internal predecessors, (628), 91 states have call successors, (93), 91 states have call predecessors, (93), 89 states have return successors, (91), 89 states have call predecessors, (91), 90 states have call successors, (91) [2022-03-20 22:28:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 911 transitions. [2022-03-20 22:28:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 825 [2022-03-20 22:28:25,691 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:28:25,691 INFO L499 BasicCegarLoop]: trace histogram [90, 90, 89, 89, 89, 89, 89, 89, 89, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:28:25,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-20 22:28:25,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:28:25,908 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:28:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:28:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1477362716, now seen corresponding path program 177 times [2022-03-20 22:28:25,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:28:25,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1232083817] [2022-03-20 22:28:25,909 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:28:25,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1477362716, now seen corresponding path program 178 times [2022-03-20 22:28:25,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:28:25,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028838314] [2022-03-20 22:28:25,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:28:25,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:28:25,920 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:28:25,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948162013] [2022-03-20 22:28:25,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:28:25,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:28:25,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:28:25,921 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:28:25,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-20 22:28:26,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:28:26,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:28:26,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 2140 conjuncts, 183 conjunts are in the unsatisfiable core [2022-03-20 22:28:26,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:28:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 35604 backedges. 178 proven. 35422 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:28:29,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:28:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 35604 backedges. 178 proven. 19758 refuted. 0 times theorem prover too weak. 15668 trivial. 0 not checked. [2022-03-20 22:28:30,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:28:30,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028838314] [2022-03-20 22:28:30,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:28:30,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948162013] [2022-03-20 22:28:30,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948162013] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:28:30,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:28:30,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 104 [2022-03-20 22:28:30,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:28:30,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1232083817] [2022-03-20 22:28:30,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1232083817] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:28:30,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:28:30,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-20 22:28:30,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677596665] [2022-03-20 22:28:30,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:28:30,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-20 22:28:30,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:28:30,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-20 22:28:30,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:28:30,325 INFO L87 Difference]: Start difference. First operand 821 states and 911 transitions. Second operand has 93 states, 93 states have (on average 6.827956989247312) internal successors, (635), 92 states have internal predecessors, (635), 92 states have call successors, (94), 92 states have call predecessors, (94), 90 states have return successors, (92), 90 states have call predecessors, (92), 91 states have call successors, (92) [2022-03-20 22:28:32,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:28:32,920 INFO L93 Difference]: Finished difference Result 835 states and 926 transitions. [2022-03-20 22:28:32,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2022-03-20 22:28:32,920 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 6.827956989247312) internal successors, (635), 92 states have internal predecessors, (635), 92 states have call successors, (94), 92 states have call predecessors, (94), 90 states have return successors, (92), 90 states have call predecessors, (92), 91 states have call successors, (92) Word has length 824 [2022-03-20 22:28:32,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:28:32,922 INFO L225 Difference]: With dead ends: 835 [2022-03-20 22:28:32,922 INFO L226 Difference]: Without dead ends: 830 [2022-03-20 22:28:32,924 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1736 GetRequests, 1544 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4114 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=14323, Invalid=22733, Unknown=0, NotChecked=0, Total=37056 [2022-03-20 22:28:32,925 INFO L913 BasicCegarLoop]: 115 mSDtfsCounter, 318 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:28:32,925 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 818 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:28:32,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-03-20 22:28:32,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 830. [2022-03-20 22:28:32,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 642 states have (on average 1.1417445482866044) internal successors, (733), 642 states have internal predecessors, (733), 95 states have call successors, (95), 94 states have call predecessors, (95), 92 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2022-03-20 22:28:32,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 921 transitions. [2022-03-20 22:28:32,996 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 921 transitions. Word has length 824 [2022-03-20 22:28:32,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:28:32,996 INFO L478 AbstractCegarLoop]: Abstraction has 830 states and 921 transitions. [2022-03-20 22:28:32,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 6.827956989247312) internal successors, (635), 92 states have internal predecessors, (635), 92 states have call successors, (94), 92 states have call predecessors, (94), 90 states have return successors, (92), 90 states have call predecessors, (92), 91 states have call successors, (92) [2022-03-20 22:28:32,996 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 921 transitions. [2022-03-20 22:28:33,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 834 [2022-03-20 22:28:33,001 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:28:33,002 INFO L499 BasicCegarLoop]: trace histogram [91, 91, 90, 90, 90, 90, 90, 90, 90, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:28:33,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-03-20 22:28:33,221 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:28:33,221 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:28:33,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:28:33,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1561336534, now seen corresponding path program 179 times [2022-03-20 22:28:33,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:28:33,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [836507318] [2022-03-20 22:28:33,222 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:28:33,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1561336534, now seen corresponding path program 180 times [2022-03-20 22:28:33,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:28:33,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203730632] [2022-03-20 22:28:33,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:28:33,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:28:33,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:28:33,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965103089] [2022-03-20 22:28:33,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:28:33,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:28:33,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:28:33,235 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:28:33,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-20 22:28:34,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2022-03-20 22:28:34,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:28:34,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 2163 conjuncts, 185 conjunts are in the unsatisfiable core [2022-03-20 22:28:34,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:28:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 36409 backedges. 180 proven. 36225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:28:36,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:28:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 36409 backedges. 180 proven. 20205 refuted. 0 times theorem prover too weak. 16024 trivial. 0 not checked. [2022-03-20 22:28:37,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:28:37,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203730632] [2022-03-20 22:28:37,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:28:37,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965103089] [2022-03-20 22:28:37,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965103089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:28:37,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:28:37,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 104 [2022-03-20 22:28:37,301 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:28:37,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [836507318] [2022-03-20 22:28:37,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [836507318] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:28:37,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:28:37,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-20 22:28:37,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587001248] [2022-03-20 22:28:37,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:28:37,302 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-20 22:28:37,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:28:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-20 22:28:37,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:28:37,303 INFO L87 Difference]: Start difference. First operand 830 states and 921 transitions. Second operand has 94 states, 94 states have (on average 6.829787234042553) internal successors, (642), 93 states have internal predecessors, (642), 93 states have call successors, (95), 93 states have call predecessors, (95), 91 states have return successors, (93), 91 states have call predecessors, (93), 92 states have call successors, (93) [2022-03-20 22:28:39,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:28:39,847 INFO L93 Difference]: Finished difference Result 844 states and 936 transitions. [2022-03-20 22:28:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-03-20 22:28:39,847 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 6.829787234042553) internal successors, (642), 93 states have internal predecessors, (642), 93 states have call successors, (95), 93 states have call predecessors, (95), 91 states have return successors, (93), 91 states have call predecessors, (93), 92 states have call successors, (93) Word has length 833 [2022-03-20 22:28:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:28:39,849 INFO L225 Difference]: With dead ends: 844 [2022-03-20 22:28:39,849 INFO L226 Difference]: Without dead ends: 839 [2022-03-20 22:28:39,852 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1755 GetRequests, 1562 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4203 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=14426, Invalid=23016, Unknown=0, NotChecked=0, Total=37442 [2022-03-20 22:28:39,852 INFO L913 BasicCegarLoop]: 116 mSDtfsCounter, 424 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:28:39,852 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 808 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:28:39,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-03-20 22:28:39,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 839. [2022-03-20 22:28:39,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 649 states have (on average 1.1417565485362096) internal successors, (741), 649 states have internal predecessors, (741), 96 states have call successors, (96), 95 states have call predecessors, (96), 93 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-20 22:28:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 931 transitions. [2022-03-20 22:28:39,901 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 931 transitions. Word has length 833 [2022-03-20 22:28:39,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:28:39,902 INFO L478 AbstractCegarLoop]: Abstraction has 839 states and 931 transitions. [2022-03-20 22:28:39,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 6.829787234042553) internal successors, (642), 93 states have internal predecessors, (642), 93 states have call successors, (95), 93 states have call predecessors, (95), 91 states have return successors, (93), 91 states have call predecessors, (93), 92 states have call successors, (93) [2022-03-20 22:28:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 931 transitions. [2022-03-20 22:28:39,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 843 [2022-03-20 22:28:39,907 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:28:39,908 INFO L499 BasicCegarLoop]: trace histogram [92, 92, 91, 91, 91, 91, 91, 91, 91, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:28:39,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-20 22:28:40,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:28:40,115 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:28:40,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:28:40,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1836337828, now seen corresponding path program 181 times [2022-03-20 22:28:40,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:28:40,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [539825144] [2022-03-20 22:28:40,116 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:28:40,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1836337828, now seen corresponding path program 182 times [2022-03-20 22:28:40,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:28:40,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914919495] [2022-03-20 22:28:40,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:28:40,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:28:40,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:28:40,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418031507] [2022-03-20 22:28:40,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:28:40,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:28:40,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:28:40,129 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:28:40,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-20 22:28:40,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:28:40,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:28:40,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 2186 conjuncts, 187 conjunts are in the unsatisfiable core [2022-03-20 22:28:40,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:28:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 37223 backedges. 182 proven. 37037 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:28:42,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:28:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 37223 backedges. 182 proven. 20657 refuted. 0 times theorem prover too weak. 16384 trivial. 0 not checked. [2022-03-20 22:28:43,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:28:43,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914919495] [2022-03-20 22:28:43,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:28:43,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418031507] [2022-03-20 22:28:43,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418031507] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:28:43,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:28:43,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 104 [2022-03-20 22:28:43,712 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:28:43,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [539825144] [2022-03-20 22:28:43,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [539825144] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:28:43,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:28:43,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-20 22:28:43,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621586898] [2022-03-20 22:28:43,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:28:43,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-20 22:28:43,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:28:43,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-20 22:28:43,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:28:43,715 INFO L87 Difference]: Start difference. First operand 839 states and 931 transitions. Second operand has 95 states, 95 states have (on average 6.831578947368421) internal successors, (649), 94 states have internal predecessors, (649), 94 states have call successors, (96), 94 states have call predecessors, (96), 92 states have return successors, (94), 92 states have call predecessors, (94), 93 states have call successors, (94) [2022-03-20 22:28:46,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:28:46,228 INFO L93 Difference]: Finished difference Result 853 states and 946 transitions. [2022-03-20 22:28:46,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2022-03-20 22:28:46,229 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 6.831578947368421) internal successors, (649), 94 states have internal predecessors, (649), 94 states have call successors, (96), 94 states have call predecessors, (96), 92 states have return successors, (94), 92 states have call predecessors, (94), 93 states have call successors, (94) Word has length 842 [2022-03-20 22:28:46,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:28:46,231 INFO L225 Difference]: With dead ends: 853 [2022-03-20 22:28:46,231 INFO L226 Difference]: Without dead ends: 848 [2022-03-20 22:28:46,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1774 GetRequests, 1580 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4293 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=14529, Invalid=23301, Unknown=0, NotChecked=0, Total=37830 [2022-03-20 22:28:46,233 INFO L913 BasicCegarLoop]: 117 mSDtfsCounter, 423 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:28:46,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 822 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:28:46,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-03-20 22:28:46,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 848. [2022-03-20 22:28:46,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 656 states have (on average 1.141768292682927) internal successors, (749), 656 states have internal predecessors, (749), 97 states have call successors, (97), 96 states have call predecessors, (97), 94 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-03-20 22:28:46,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 941 transitions. [2022-03-20 22:28:46,280 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 941 transitions. Word has length 842 [2022-03-20 22:28:46,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:28:46,281 INFO L478 AbstractCegarLoop]: Abstraction has 848 states and 941 transitions. [2022-03-20 22:28:46,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 6.831578947368421) internal successors, (649), 94 states have internal predecessors, (649), 94 states have call successors, (96), 94 states have call predecessors, (96), 92 states have return successors, (94), 92 states have call predecessors, (94), 93 states have call successors, (94) [2022-03-20 22:28:46,281 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 941 transitions. [2022-03-20 22:28:46,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2022-03-20 22:28:46,287 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:28:46,287 INFO L499 BasicCegarLoop]: trace histogram [93, 93, 92, 92, 92, 92, 92, 92, 92, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:28:46,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-20 22:28:46,497 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:28:46,497 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:28:46,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:28:46,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1676579222, now seen corresponding path program 183 times [2022-03-20 22:28:46,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:28:46,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1806954457] [2022-03-20 22:28:46,498 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:28:46,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1676579222, now seen corresponding path program 184 times [2022-03-20 22:28:46,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:28:46,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510363668] [2022-03-20 22:28:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:28:46,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:28:46,514 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:28:46,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100415530] [2022-03-20 22:28:46,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:28:46,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:28:46,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:28:46,515 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:28:46,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-20 22:28:46,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:28:46,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:28:46,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 2209 conjuncts, 189 conjunts are in the unsatisfiable core [2022-03-20 22:28:46,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:28:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 38046 backedges. 184 proven. 37858 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:28:50,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:28:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 38046 backedges. 184 proven. 21114 refuted. 0 times theorem prover too weak. 16748 trivial. 0 not checked. [2022-03-20 22:28:51,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:28:51,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510363668] [2022-03-20 22:28:51,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:28:51,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100415530] [2022-03-20 22:28:51,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100415530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:28:51,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:28:51,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 104 [2022-03-20 22:28:51,361 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:28:51,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1806954457] [2022-03-20 22:28:51,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1806954457] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:28:51,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:28:51,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-20 22:28:51,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375289466] [2022-03-20 22:28:51,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:28:51,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-20 22:28:51,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:28:51,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-20 22:28:51,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:28:51,366 INFO L87 Difference]: Start difference. First operand 848 states and 941 transitions. Second operand has 96 states, 96 states have (on average 6.833333333333333) internal successors, (656), 95 states have internal predecessors, (656), 95 states have call successors, (97), 95 states have call predecessors, (97), 93 states have return successors, (95), 93 states have call predecessors, (95), 94 states have call successors, (95) [2022-03-20 22:28:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:28:53,974 INFO L93 Difference]: Finished difference Result 862 states and 956 transitions. [2022-03-20 22:28:53,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-03-20 22:28:53,975 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 6.833333333333333) internal successors, (656), 95 states have internal predecessors, (656), 95 states have call successors, (97), 95 states have call predecessors, (97), 93 states have return successors, (95), 93 states have call predecessors, (95), 94 states have call successors, (95) Word has length 851 [2022-03-20 22:28:53,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:28:53,976 INFO L225 Difference]: With dead ends: 862 [2022-03-20 22:28:53,976 INFO L226 Difference]: Without dead ends: 857 [2022-03-20 22:28:53,979 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1793 GetRequests, 1598 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4384 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=14632, Invalid=23588, Unknown=0, NotChecked=0, Total=38220 [2022-03-20 22:28:53,979 INFO L913 BasicCegarLoop]: 118 mSDtfsCounter, 383 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 22:28:53,979 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 836 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 22:28:53,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-03-20 22:28:54,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 857. [2022-03-20 22:28:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 663 states have (on average 1.1417797888386123) internal successors, (757), 663 states have internal predecessors, (757), 98 states have call successors, (98), 97 states have call predecessors, (98), 95 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2022-03-20 22:28:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 951 transitions. [2022-03-20 22:28:54,025 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 951 transitions. Word has length 851 [2022-03-20 22:28:54,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:28:54,025 INFO L478 AbstractCegarLoop]: Abstraction has 857 states and 951 transitions. [2022-03-20 22:28:54,026 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 6.833333333333333) internal successors, (656), 95 states have internal predecessors, (656), 95 states have call successors, (97), 95 states have call predecessors, (97), 93 states have return successors, (95), 93 states have call predecessors, (95), 94 states have call successors, (95) [2022-03-20 22:28:54,026 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 951 transitions. [2022-03-20 22:28:54,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 861 [2022-03-20 22:28:54,042 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:28:54,042 INFO L499 BasicCegarLoop]: trace histogram [94, 94, 93, 93, 93, 93, 93, 93, 93, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:28:54,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-20 22:28:54,243 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-20 22:28:54,243 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:28:54,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:28:54,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1990645404, now seen corresponding path program 185 times [2022-03-20 22:28:54,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:28:54,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1791185879] [2022-03-20 22:28:54,244 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:28:54,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1990645404, now seen corresponding path program 186 times [2022-03-20 22:28:54,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:28:54,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419599724] [2022-03-20 22:28:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:28:54,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:28:54,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:28:54,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214060125] [2022-03-20 22:28:54,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:28:54,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:28:54,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:28:54,258 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:28:54,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-20 22:28:55,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 94 check-sat command(s) [2022-03-20 22:28:55,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:28:55,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 2232 conjuncts, 191 conjunts are in the unsatisfiable core [2022-03-20 22:28:55,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:28:57,377 INFO L134 CoverageAnalysis]: Checked inductivity of 38878 backedges. 186 proven. 38688 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:28:57,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:28:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 38878 backedges. 186 proven. 21576 refuted. 0 times theorem prover too weak. 17116 trivial. 0 not checked. [2022-03-20 22:28:58,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:28:58,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419599724] [2022-03-20 22:28:58,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:28:58,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214060125] [2022-03-20 22:28:58,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214060125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:28:58,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:28:58,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 104 [2022-03-20 22:28:58,287 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:28:58,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1791185879] [2022-03-20 22:28:58,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1791185879] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:28:58,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:28:58,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-20 22:28:58,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089110716] [2022-03-20 22:28:58,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:28:58,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-20 22:28:58,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:28:58,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-20 22:28:58,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:28:58,290 INFO L87 Difference]: Start difference. First operand 857 states and 951 transitions. Second operand has 97 states, 97 states have (on average 6.835051546391752) internal successors, (663), 96 states have internal predecessors, (663), 96 states have call successors, (98), 96 states have call predecessors, (98), 94 states have return successors, (96), 94 states have call predecessors, (96), 95 states have call successors, (96) [2022-03-20 22:29:01,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:29:01,105 INFO L93 Difference]: Finished difference Result 871 states and 966 transitions. [2022-03-20 22:29:01,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-03-20 22:29:01,105 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 6.835051546391752) internal successors, (663), 96 states have internal predecessors, (663), 96 states have call successors, (98), 96 states have call predecessors, (98), 94 states have return successors, (96), 94 states have call predecessors, (96), 95 states have call successors, (96) Word has length 860 [2022-03-20 22:29:01,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:29:01,107 INFO L225 Difference]: With dead ends: 871 [2022-03-20 22:29:01,107 INFO L226 Difference]: Without dead ends: 866 [2022-03-20 22:29:01,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1812 GetRequests, 1616 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4476 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=14735, Invalid=23877, Unknown=0, NotChecked=0, Total=38612 [2022-03-20 22:29:01,109 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 446 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 22:29:01,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 844 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 22:29:01,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-03-20 22:29:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2022-03-20 22:29:01,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 670 states have (on average 1.1417910447761195) internal successors, (765), 670 states have internal predecessors, (765), 99 states have call successors, (99), 98 states have call predecessors, (99), 96 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-03-20 22:29:01,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 961 transitions. [2022-03-20 22:29:01,154 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 961 transitions. Word has length 860 [2022-03-20 22:29:01,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:29:01,154 INFO L478 AbstractCegarLoop]: Abstraction has 866 states and 961 transitions. [2022-03-20 22:29:01,154 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 6.835051546391752) internal successors, (663), 96 states have internal predecessors, (663), 96 states have call successors, (98), 96 states have call predecessors, (98), 94 states have return successors, (96), 94 states have call predecessors, (96), 95 states have call successors, (96) [2022-03-20 22:29:01,154 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 961 transitions. [2022-03-20 22:29:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2022-03-20 22:29:01,160 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:29:01,160 INFO L499 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:29:01,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-20 22:29:01,368 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:29:01,369 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:29:01,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:29:01,369 INFO L85 PathProgramCache]: Analyzing trace with hash 2015680598, now seen corresponding path program 187 times [2022-03-20 22:29:01,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:29:01,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1748598685] [2022-03-20 22:29:01,369 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:29:01,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2015680598, now seen corresponding path program 188 times [2022-03-20 22:29:01,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:29:01,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882030142] [2022-03-20 22:29:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:29:01,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:29:01,381 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:29:01,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840648700] [2022-03-20 22:29:01,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:29:01,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:29:01,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:29:01,382 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:29:01,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-20 22:29:01,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:29:01,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:29:01,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 2255 conjuncts, 193 conjunts are in the unsatisfiable core [2022-03-20 22:29:01,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:29:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 39719 backedges. 188 proven. 39527 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:29:04,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:29:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 39719 backedges. 188 proven. 22043 refuted. 0 times theorem prover too weak. 17488 trivial. 0 not checked. [2022-03-20 22:29:05,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:29:05,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882030142] [2022-03-20 22:29:05,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:29:05,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840648700] [2022-03-20 22:29:05,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840648700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:29:05,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:29:05,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 104 [2022-03-20 22:29:05,408 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:29:05,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1748598685] [2022-03-20 22:29:05,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1748598685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:29:05,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:29:05,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-20 22:29:05,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439923712] [2022-03-20 22:29:05,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:29:05,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-20 22:29:05,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:29:05,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-20 22:29:05,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:29:05,411 INFO L87 Difference]: Start difference. First operand 866 states and 961 transitions. Second operand has 98 states, 98 states have (on average 6.836734693877551) internal successors, (670), 97 states have internal predecessors, (670), 97 states have call successors, (99), 97 states have call predecessors, (99), 95 states have return successors, (97), 95 states have call predecessors, (97), 96 states have call successors, (97) [2022-03-20 22:29:08,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:29:08,321 INFO L93 Difference]: Finished difference Result 880 states and 976 transitions. [2022-03-20 22:29:08,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-03-20 22:29:08,322 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 6.836734693877551) internal successors, (670), 97 states have internal predecessors, (670), 97 states have call successors, (99), 97 states have call predecessors, (99), 95 states have return successors, (97), 95 states have call predecessors, (97), 96 states have call successors, (97) Word has length 869 [2022-03-20 22:29:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:29:08,323 INFO L225 Difference]: With dead ends: 880 [2022-03-20 22:29:08,323 INFO L226 Difference]: Without dead ends: 875 [2022-03-20 22:29:08,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1831 GetRequests, 1634 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4569 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=14838, Invalid=24168, Unknown=0, NotChecked=0, Total=39006 [2022-03-20 22:29:08,326 INFO L913 BasicCegarLoop]: 120 mSDtfsCounter, 388 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 22:29:08,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 852 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 22:29:08,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-03-20 22:29:08,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 875. [2022-03-20 22:29:08,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 677 states have (on average 1.1418020679468242) internal successors, (773), 677 states have internal predecessors, (773), 100 states have call successors, (100), 99 states have call predecessors, (100), 97 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2022-03-20 22:29:08,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 971 transitions. [2022-03-20 22:29:08,371 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 971 transitions. Word has length 869 [2022-03-20 22:29:08,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:29:08,372 INFO L478 AbstractCegarLoop]: Abstraction has 875 states and 971 transitions. [2022-03-20 22:29:08,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 6.836734693877551) internal successors, (670), 97 states have internal predecessors, (670), 97 states have call successors, (99), 97 states have call predecessors, (99), 95 states have return successors, (97), 95 states have call predecessors, (97), 96 states have call successors, (97) [2022-03-20 22:29:08,372 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 971 transitions. [2022-03-20 22:29:08,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2022-03-20 22:29:08,377 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:29:08,378 INFO L499 BasicCegarLoop]: trace histogram [96, 96, 95, 95, 95, 95, 95, 95, 95, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:29:08,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-20 22:29:08,591 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:29:08,591 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:29:08,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:29:08,592 INFO L85 PathProgramCache]: Analyzing trace with hash 187967452, now seen corresponding path program 189 times [2022-03-20 22:29:08,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:29:08,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1817372521] [2022-03-20 22:29:08,592 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:29:08,592 INFO L85 PathProgramCache]: Analyzing trace with hash 187967452, now seen corresponding path program 190 times [2022-03-20 22:29:08,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:29:08,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636795233] [2022-03-20 22:29:08,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:29:08,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:29:08,603 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:29:08,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44972109] [2022-03-20 22:29:08,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:29:08,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:29:08,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:29:08,605 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:29:08,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-20 22:29:08,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:29:08,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:29:08,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 2278 conjuncts, 195 conjunts are in the unsatisfiable core [2022-03-20 22:29:08,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:29:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 40569 backedges. 190 proven. 40375 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:29:12,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:29:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 40569 backedges. 190 proven. 22515 refuted. 0 times theorem prover too weak. 17864 trivial. 0 not checked. [2022-03-20 22:29:14,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:29:14,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636795233] [2022-03-20 22:29:14,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:29:14,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44972109] [2022-03-20 22:29:14,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44972109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:29:14,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:29:14,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 104 [2022-03-20 22:29:14,177 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:29:14,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1817372521] [2022-03-20 22:29:14,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1817372521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:29:14,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:29:14,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-20 22:29:14,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942303786] [2022-03-20 22:29:14,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:29:14,178 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-20 22:29:14,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:29:14,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-20 22:29:14,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:29:14,180 INFO L87 Difference]: Start difference. First operand 875 states and 971 transitions. Second operand has 99 states, 99 states have (on average 6.838383838383838) internal successors, (677), 98 states have internal predecessors, (677), 98 states have call successors, (100), 98 states have call predecessors, (100), 96 states have return successors, (98), 96 states have call predecessors, (98), 97 states have call successors, (98) [2022-03-20 22:29:16,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:29:16,942 INFO L93 Difference]: Finished difference Result 889 states and 986 transitions. [2022-03-20 22:29:16,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2022-03-20 22:29:16,942 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 6.838383838383838) internal successors, (677), 98 states have internal predecessors, (677), 98 states have call successors, (100), 98 states have call predecessors, (100), 96 states have return successors, (98), 96 states have call predecessors, (98), 97 states have call successors, (98) Word has length 878 [2022-03-20 22:29:16,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:29:16,944 INFO L225 Difference]: With dead ends: 889 [2022-03-20 22:29:16,944 INFO L226 Difference]: Without dead ends: 884 [2022-03-20 22:29:16,946 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1850 GetRequests, 1652 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4663 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=14941, Invalid=24461, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 22:29:16,946 INFO L913 BasicCegarLoop]: 121 mSDtfsCounter, 406 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 22:29:16,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 854 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 22:29:16,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-03-20 22:29:16,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 884. [2022-03-20 22:29:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 684 states have (on average 1.141812865497076) internal successors, (781), 684 states have internal predecessors, (781), 101 states have call successors, (101), 100 states have call predecessors, (101), 98 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-20 22:29:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 981 transitions. [2022-03-20 22:29:16,993 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 981 transitions. Word has length 878 [2022-03-20 22:29:16,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:29:16,993 INFO L478 AbstractCegarLoop]: Abstraction has 884 states and 981 transitions. [2022-03-20 22:29:16,994 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 6.838383838383838) internal successors, (677), 98 states have internal predecessors, (677), 98 states have call successors, (100), 98 states have call predecessors, (100), 96 states have return successors, (98), 96 states have call predecessors, (98), 97 states have call successors, (98) [2022-03-20 22:29:16,994 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 981 transitions. [2022-03-20 22:29:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 888 [2022-03-20 22:29:16,999 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:29:17,000 INFO L499 BasicCegarLoop]: trace histogram [97, 97, 96, 96, 96, 96, 96, 96, 96, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:29:17,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-20 22:29:17,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-20 22:29:17,219 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:29:17,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:29:17,219 INFO L85 PathProgramCache]: Analyzing trace with hash 22998806, now seen corresponding path program 191 times [2022-03-20 22:29:17,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:29:17,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [667470809] [2022-03-20 22:29:17,220 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:29:17,220 INFO L85 PathProgramCache]: Analyzing trace with hash 22998806, now seen corresponding path program 192 times [2022-03-20 22:29:17,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:29:17,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916043290] [2022-03-20 22:29:17,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:29:17,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:29:17,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:29:17,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438576998] [2022-03-20 22:29:17,231 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:29:17,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:29:17,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:29:17,232 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:29:17,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-20 22:29:18,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2022-03-20 22:29:18,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:29:18,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 2301 conjuncts, 197 conjunts are in the unsatisfiable core [2022-03-20 22:29:18,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:29:20,670 INFO L134 CoverageAnalysis]: Checked inductivity of 41428 backedges. 192 proven. 41232 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:29:20,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:29:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 41428 backedges. 192 proven. 22992 refuted. 0 times theorem prover too weak. 18244 trivial. 0 not checked. [2022-03-20 22:29:21,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:29:21,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916043290] [2022-03-20 22:29:21,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:29:21,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438576998] [2022-03-20 22:29:21,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438576998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:29:21,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:29:21,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 104 [2022-03-20 22:29:21,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:29:21,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [667470809] [2022-03-20 22:29:21,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [667470809] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:29:21,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:29:21,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-20 22:29:21,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168103608] [2022-03-20 22:29:21,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:29:21,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-20 22:29:21,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:29:21,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-20 22:29:21,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:29:21,509 INFO L87 Difference]: Start difference. First operand 884 states and 981 transitions. Second operand has 100 states, 100 states have (on average 6.84) internal successors, (684), 99 states have internal predecessors, (684), 99 states have call successors, (101), 99 states have call predecessors, (101), 97 states have return successors, (99), 97 states have call predecessors, (99), 98 states have call successors, (99) [2022-03-20 22:29:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:29:24,399 INFO L93 Difference]: Finished difference Result 898 states and 996 transitions. [2022-03-20 22:29:24,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-03-20 22:29:24,400 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 6.84) internal successors, (684), 99 states have internal predecessors, (684), 99 states have call successors, (101), 99 states have call predecessors, (101), 97 states have return successors, (99), 97 states have call predecessors, (99), 98 states have call successors, (99) Word has length 887 [2022-03-20 22:29:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:29:24,402 INFO L225 Difference]: With dead ends: 898 [2022-03-20 22:29:24,402 INFO L226 Difference]: Without dead ends: 893 [2022-03-20 22:29:24,404 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1869 GetRequests, 1670 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4758 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=15044, Invalid=24756, Unknown=0, NotChecked=0, Total=39800 [2022-03-20 22:29:24,405 INFO L913 BasicCegarLoop]: 122 mSDtfsCounter, 324 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 22:29:24,405 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 898 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 22:29:24,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-03-20 22:29:24,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2022-03-20 22:29:24,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 691 states have (on average 1.1418234442836468) internal successors, (789), 691 states have internal predecessors, (789), 102 states have call successors, (102), 101 states have call predecessors, (102), 99 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-03-20 22:29:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 991 transitions. [2022-03-20 22:29:24,468 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 991 transitions. Word has length 887 [2022-03-20 22:29:24,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:29:24,469 INFO L478 AbstractCegarLoop]: Abstraction has 893 states and 991 transitions. [2022-03-20 22:29:24,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 6.84) internal successors, (684), 99 states have internal predecessors, (684), 99 states have call successors, (101), 99 states have call predecessors, (101), 97 states have return successors, (99), 97 states have call predecessors, (99), 98 states have call successors, (99) [2022-03-20 22:29:24,469 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 991 transitions. [2022-03-20 22:29:24,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 897 [2022-03-20 22:29:24,476 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:29:24,476 INFO L499 BasicCegarLoop]: trace histogram [98, 98, 97, 97, 97, 97, 97, 97, 97, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:29:24,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-20 22:29:24,686 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:29:24,686 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:29:24,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:29:24,687 INFO L85 PathProgramCache]: Analyzing trace with hash -905467620, now seen corresponding path program 193 times [2022-03-20 22:29:24,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:29:24,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [323024976] [2022-03-20 22:29:24,687 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:29:24,687 INFO L85 PathProgramCache]: Analyzing trace with hash -905467620, now seen corresponding path program 194 times [2022-03-20 22:29:24,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:29:24,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107607234] [2022-03-20 22:29:24,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:29:24,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:29:24,703 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:29:24,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489481488] [2022-03-20 22:29:24,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:29:24,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:29:24,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:29:24,704 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:29:24,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-20 22:29:24,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:29:24,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:29:24,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 2324 conjuncts, 199 conjunts are in the unsatisfiable core [2022-03-20 22:29:24,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:29:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 42296 backedges. 194 proven. 42098 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:29:28,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:29:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 42296 backedges. 194 proven. 23474 refuted. 0 times theorem prover too weak. 18628 trivial. 0 not checked. [2022-03-20 22:29:29,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:29:29,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107607234] [2022-03-20 22:29:29,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:29:29,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489481488] [2022-03-20 22:29:29,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489481488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:29:29,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:29:29,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 104 [2022-03-20 22:29:29,497 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:29:29,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [323024976] [2022-03-20 22:29:29,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [323024976] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:29:29,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:29:29,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-20 22:29:29,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759395122] [2022-03-20 22:29:29,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:29:29,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-20 22:29:29,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:29:29,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-20 22:29:29,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:29:29,502 INFO L87 Difference]: Start difference. First operand 893 states and 991 transitions. Second operand has 101 states, 101 states have (on average 6.841584158415841) internal successors, (691), 100 states have internal predecessors, (691), 100 states have call successors, (102), 100 states have call predecessors, (102), 98 states have return successors, (100), 98 states have call predecessors, (100), 99 states have call successors, (100) [2022-03-20 22:29:33,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:29:33,071 INFO L93 Difference]: Finished difference Result 907 states and 1006 transitions. [2022-03-20 22:29:33,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-03-20 22:29:33,072 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 6.841584158415841) internal successors, (691), 100 states have internal predecessors, (691), 100 states have call successors, (102), 100 states have call predecessors, (102), 98 states have return successors, (100), 98 states have call predecessors, (100), 99 states have call successors, (100) Word has length 896 [2022-03-20 22:29:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:29:33,074 INFO L225 Difference]: With dead ends: 907 [2022-03-20 22:29:33,074 INFO L226 Difference]: Without dead ends: 902 [2022-03-20 22:29:33,076 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1888 GetRequests, 1688 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4854 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=15147, Invalid=25053, Unknown=0, NotChecked=0, Total=40200 [2022-03-20 22:29:33,076 INFO L913 BasicCegarLoop]: 123 mSDtfsCounter, 423 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 22:29:33,076 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 870 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 22:29:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-03-20 22:29:33,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 902. [2022-03-20 22:29:33,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 698 states have (on average 1.1418338108882522) internal successors, (797), 698 states have internal predecessors, (797), 103 states have call successors, (103), 102 states have call predecessors, (103), 100 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2022-03-20 22:29:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1001 transitions. [2022-03-20 22:29:33,160 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1001 transitions. Word has length 896 [2022-03-20 22:29:33,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:29:33,160 INFO L478 AbstractCegarLoop]: Abstraction has 902 states and 1001 transitions. [2022-03-20 22:29:33,160 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 6.841584158415841) internal successors, (691), 100 states have internal predecessors, (691), 100 states have call successors, (102), 100 states have call predecessors, (102), 98 states have return successors, (100), 98 states have call predecessors, (100), 99 states have call successors, (100) [2022-03-20 22:29:33,161 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1001 transitions. [2022-03-20 22:29:33,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 906 [2022-03-20 22:29:33,166 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:29:33,166 INFO L499 BasicCegarLoop]: trace histogram [99, 99, 98, 98, 98, 98, 98, 98, 98, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:29:33,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-20 22:29:33,385 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:29:33,385 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:29:33,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:29:33,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1414059478, now seen corresponding path program 195 times [2022-03-20 22:29:33,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:29:33,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [139485259] [2022-03-20 22:29:33,386 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:29:33,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1414059478, now seen corresponding path program 196 times [2022-03-20 22:29:33,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:29:33,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885501184] [2022-03-20 22:29:33,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:29:33,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:29:33,400 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:29:33,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [390868156] [2022-03-20 22:29:33,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 22:29:33,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:29:33,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:29:33,401 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:29:33,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-20 22:29:33,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 22:29:33,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:29:33,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 2347 conjuncts, 201 conjunts are in the unsatisfiable core [2022-03-20 22:29:33,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:29:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 43173 backedges. 196 proven. 42973 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:29:36,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:29:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 43173 backedges. 196 proven. 23961 refuted. 0 times theorem prover too weak. 19016 trivial. 0 not checked. [2022-03-20 22:29:37,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:29:37,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885501184] [2022-03-20 22:29:37,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:29:37,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390868156] [2022-03-20 22:29:37,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390868156] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:29:37,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:29:37,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 104 [2022-03-20 22:29:37,095 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:29:37,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [139485259] [2022-03-20 22:29:37,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [139485259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:29:37,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:29:37,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-20 22:29:37,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482931697] [2022-03-20 22:29:37,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:29:37,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-20 22:29:37,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:29:37,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-20 22:29:37,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 22:29:37,099 INFO L87 Difference]: Start difference. First operand 902 states and 1001 transitions. Second operand has 102 states, 102 states have (on average 6.8431372549019605) internal successors, (698), 101 states have internal predecessors, (698), 101 states have call successors, (103), 101 states have call predecessors, (103), 99 states have return successors, (101), 99 states have call predecessors, (101), 100 states have call successors, (101) [2022-03-20 22:29:40,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:29:40,041 INFO L93 Difference]: Finished difference Result 916 states and 1016 transitions. [2022-03-20 22:29:40,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2022-03-20 22:29:40,041 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 6.8431372549019605) internal successors, (698), 101 states have internal predecessors, (698), 101 states have call successors, (103), 101 states have call predecessors, (103), 99 states have return successors, (101), 99 states have call predecessors, (101), 100 states have call successors, (101) Word has length 905 [2022-03-20 22:29:40,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:29:40,043 INFO L225 Difference]: With dead ends: 916 [2022-03-20 22:29:40,043 INFO L226 Difference]: Without dead ends: 911 [2022-03-20 22:29:40,046 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1907 GetRequests, 1706 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=15250, Invalid=25352, Unknown=0, NotChecked=0, Total=40602 [2022-03-20 22:29:40,046 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 546 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 22:29:40,046 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 878 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 22:29:40,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-03-20 22:29:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 911. [2022-03-20 22:29:40,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 705 states have (on average 1.1418439716312057) internal successors, (805), 705 states have internal predecessors, (805), 104 states have call successors, (104), 103 states have call predecessors, (104), 101 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2022-03-20 22:29:40,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1011 transitions. [2022-03-20 22:29:40,122 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1011 transitions. Word has length 905 [2022-03-20 22:29:40,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:29:40,123 INFO L478 AbstractCegarLoop]: Abstraction has 911 states and 1011 transitions. [2022-03-20 22:29:40,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 6.8431372549019605) internal successors, (698), 101 states have internal predecessors, (698), 101 states have call successors, (103), 101 states have call predecessors, (103), 99 states have return successors, (101), 99 states have call predecessors, (101), 100 states have call successors, (101) [2022-03-20 22:29:40,123 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1011 transitions. [2022-03-20 22:29:40,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 915 [2022-03-20 22:29:40,129 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:29:40,129 INFO L499 BasicCegarLoop]: trace histogram [100, 100, 99, 99, 99, 99, 99, 99, 99, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:29:40,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-20 22:29:40,344 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-20 22:29:40,345 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:29:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:29:40,345 INFO L85 PathProgramCache]: Analyzing trace with hash -537568676, now seen corresponding path program 197 times [2022-03-20 22:29:40,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:29:40,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [119645473] [2022-03-20 22:29:40,346 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:29:40,346 INFO L85 PathProgramCache]: Analyzing trace with hash -537568676, now seen corresponding path program 198 times [2022-03-20 22:29:40,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:29:40,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905172450] [2022-03-20 22:29:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:29:40,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:29:40,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:29:40,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220389946] [2022-03-20 22:29:40,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 22:29:40,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:29:40,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:29:40,363 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:29:40,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-20 22:29:41,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 100 check-sat command(s) [2022-03-20 22:29:41,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 22:29:41,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 2370 conjuncts, 203 conjunts are in the unsatisfiable core [2022-03-20 22:29:41,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 22:29:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 44059 backedges. 198 proven. 43857 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 22:29:45,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 22:29:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 44059 backedges. 198 proven. 24453 refuted. 0 times theorem prover too weak. 19408 trivial. 0 not checked. [2022-03-20 22:29:46,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 22:29:46,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905172450] [2022-03-20 22:29:46,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 22:29:46,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220389946] [2022-03-20 22:29:46,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220389946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 22:29:46,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 22:29:46,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2022-03-20 22:29:46,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 22:29:46,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [119645473] [2022-03-20 22:29:46,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [119645473] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 22:29:46,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 22:29:46,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-03-20 22:29:46,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009464442] [2022-03-20 22:29:46,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 22:29:46,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-20 22:29:46,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 22:29:46,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-20 22:29:46,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 22:29:46,900 INFO L87 Difference]: Start difference. First operand 911 states and 1011 transitions. Second operand has 103 states, 103 states have (on average 6.844660194174757) internal successors, (705), 102 states have internal predecessors, (705), 102 states have call successors, (104), 102 states have call predecessors, (104), 100 states have return successors, (102), 100 states have call predecessors, (102), 101 states have call successors, (102) [2022-03-20 22:29:51,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 22:29:51,200 INFO L93 Difference]: Finished difference Result 925 states and 1026 transitions. [2022-03-20 22:29:51,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-03-20 22:29:51,201 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 6.844660194174757) internal successors, (705), 102 states have internal predecessors, (705), 102 states have call successors, (104), 102 states have call predecessors, (104), 100 states have return successors, (102), 100 states have call predecessors, (102), 101 states have call successors, (102) Word has length 914 [2022-03-20 22:29:51,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 22:29:51,203 INFO L225 Difference]: With dead ends: 925 [2022-03-20 22:29:51,203 INFO L226 Difference]: Without dead ends: 920 [2022-03-20 22:29:51,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 1926 GetRequests, 1725 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=15251, Invalid=25351, Unknown=0, NotChecked=0, Total=40602 [2022-03-20 22:29:51,205 INFO L913 BasicCegarLoop]: 125 mSDtfsCounter, 471 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 22:29:51,205 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [471 Valid, 874 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 22:29:51,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-03-20 22:29:51,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 920. [2022-03-20 22:29:51,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 712 states have (on average 1.1418539325842696) internal successors, (813), 712 states have internal predecessors, (813), 105 states have call successors, (105), 104 states have call predecessors, (105), 102 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-20 22:29:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1021 transitions. [2022-03-20 22:29:51,254 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1021 transitions. Word has length 914 [2022-03-20 22:29:51,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 22:29:51,255 INFO L478 AbstractCegarLoop]: Abstraction has 920 states and 1021 transitions. [2022-03-20 22:29:51,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 6.844660194174757) internal successors, (705), 102 states have internal predecessors, (705), 102 states have call successors, (104), 102 states have call predecessors, (104), 100 states have return successors, (102), 100 states have call predecessors, (102), 101 states have call successors, (102) [2022-03-20 22:29:51,255 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1021 transitions. [2022-03-20 22:29:51,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 924 [2022-03-20 22:29:51,261 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 22:29:51,261 INFO L499 BasicCegarLoop]: trace histogram [101, 101, 100, 100, 100, 100, 100, 100, 100, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 22:29:51,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-20 22:29:51,465 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-20 22:29:51,465 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 22:29:51,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 22:29:51,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1921944726, now seen corresponding path program 199 times [2022-03-20 22:29:51,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 22:29:51,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1988335704] [2022-03-20 22:29:51,466 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 22:29:51,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1921944726, now seen corresponding path program 200 times [2022-03-20 22:29:51,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 22:29:51,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81280922] [2022-03-20 22:29:51,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 22:29:51,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 22:29:51,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 22:29:51,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829998564] [2022-03-20 22:29:51,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 22:29:51,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 22:29:51,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 22:29:51,479 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 22:29:51,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-20 22:29:51,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 22:29:51,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-03-20 22:29:51,805 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 22:29:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 22:29:52,287 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 22:29:52,287 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-03-20 22:29:52,288 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-03-20 22:29:52,293 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 22:29:52,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-20 22:29:52,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-20 22:29:52,502 INFO L719 BasicCegarLoop]: Path program histogram: [200, 2, 2, 2, 2] [2022-03-20 22:29:52,505 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 22:29:52,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 10:29:52 BoogieIcfgContainer [2022-03-20 22:29:52,571 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 22:29:52,571 INFO L158 Benchmark]: Toolchain (without parser) took 428066.14ms. Allocated memory was 175.1MB in the beginning and 664.8MB in the end (delta: 489.7MB). Free memory was 123.6MB in the beginning and 392.5MB in the end (delta: -268.9MB). Peak memory consumption was 221.7MB. Max. memory is 8.0GB. [2022-03-20 22:29:52,571 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 175.1MB. Free memory is still 139.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 22:29:52,571 INFO L158 Benchmark]: CACSL2BoogieTranslator took 178.27ms. Allocated memory was 175.1MB in the beginning and 221.2MB in the end (delta: 46.1MB). Free memory was 123.4MB in the beginning and 198.5MB in the end (delta: -75.1MB). Peak memory consumption was 11.1MB. Max. memory is 8.0GB. [2022-03-20 22:29:52,572 INFO L158 Benchmark]: Boogie Preprocessor took 24.14ms. Allocated memory is still 221.2MB. Free memory was 198.5MB in the beginning and 197.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 22:29:52,572 INFO L158 Benchmark]: RCFGBuilder took 187.52ms. Allocated memory is still 221.2MB. Free memory was 197.0MB in the beginning and 187.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-20 22:29:52,572 INFO L158 Benchmark]: TraceAbstraction took 427673.17ms. Allocated memory was 221.2MB in the beginning and 664.8MB in the end (delta: 443.5MB). Free memory was 186.5MB in the beginning and 392.5MB in the end (delta: -206.0MB). Peak memory consumption was 238.9MB. Max. memory is 8.0GB. [2022-03-20 22:29:52,572 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 175.1MB. Free memory is still 139.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 178.27ms. Allocated memory was 175.1MB in the beginning and 221.2MB in the end (delta: 46.1MB). Free memory was 123.4MB in the beginning and 198.5MB in the end (delta: -75.1MB). Peak memory consumption was 11.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.14ms. Allocated memory is still 221.2MB. Free memory was 198.5MB in the beginning and 197.5MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 187.52ms. Allocated memory is still 221.2MB. Free memory was 197.0MB in the beginning and 187.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 427673.17ms. Allocated memory was 221.2MB in the beginning and 664.8MB in the end (delta: 443.5MB). Free memory was 186.5MB in the beginning and 392.5MB in the end (delta: -206.0MB). Peak memory consumption was 238.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) [L13] COND FALSE !(!cond) [L29] RET assume_abort_if_not(x1 >= 0) [L30] CALL assume_abort_if_not(x2 != 0) [L13] COND FALSE !(!cond) [L30] RET assume_abort_if_not(x2 != 0) [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND TRUE counter++<100 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L16] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) [L39] COND FALSE !(!(y3 != 0)) [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 [L36] EXPR counter++ [L36] COND FALSE !(counter++<100) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) [L16] COND TRUE !(cond) [L18] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 427.6s, OverallIterations: 104, TraceHistogramMax: 101, PathProgramHistogramMax: 200, EmptinessCheckTime: 0.3s, AutomataDifference: 121.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 20220 SdHoareTripleChecker+Valid, 20.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 20217 mSDsluCounter, 48453 SdHoareTripleChecker+Invalid, 16.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 40827 mSDsCounter, 2783 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 35180 IncrementalHoareTripleChecker+Invalid, 37963 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2783 mSolverCounterUnsat, 7626 mSDtfsCounter, 35180 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 98620 GetRequests, 85856 SyntacticMatches, 51 SemanticMatches, 12713 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175334 ImplicationChecksByTransitivity, 231.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=920occurred in iteration=103, InterpolantAutomatonStates: 10316, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.9s AutomataMinimizationTime, 103 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-20 22:29:52,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...