/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 16:26:13,134 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 16:26:13,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 16:26:13,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 16:26:13,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 16:26:13,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 16:26:13,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 16:26:13,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 16:26:13,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 16:26:13,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 16:26:13,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 16:26:13,194 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 16:26:13,195 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 16:26:13,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 16:26:13,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 16:26:13,197 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 16:26:13,198 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 16:26:13,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 16:26:13,210 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 16:26:13,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 16:26:13,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 16:26:13,212 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 16:26:13,222 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 16:26:13,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 16:26:13,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 16:26:13,223 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 16:26:13,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 16:26:13,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 16:26:13,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 16:26:13,224 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 16:26:13,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 16:26:13,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 16:26:13,224 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 16:26:13,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 16:26:13,225 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 16:26:13,225 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 16:26:13,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 16:26:13,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 16:26:13,225 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 16:26:13,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 16:26:13,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:26:13,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 16:26:13,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 16:26:13,225 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 16:26:13,225 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 16:26:13,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 16:26:13,226 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 16:26:13,226 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 16:26:13,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 16:26:13,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 16:26:13,432 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 16:26:13,433 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 16:26:13,433 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 16:26:13,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound2.c [2022-04-06 16:26:13,481 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/241d1202d/9427ff278b944f13892c134605c648d6/FLAG7650692ab [2022-04-06 16:26:13,826 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 16:26:13,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound2.c [2022-04-06 16:26:13,830 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/241d1202d/9427ff278b944f13892c134605c648d6/FLAG7650692ab [2022-04-06 16:26:13,842 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/241d1202d/9427ff278b944f13892c134605c648d6 [2022-04-06 16:26:13,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 16:26:13,845 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 16:26:13,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 16:26:13,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 16:26:13,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 16:26:13,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:26:13" (1/1) ... [2022-04-06 16:26:13,852 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fc8baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:13, skipping insertion in model container [2022-04-06 16:26:13,852 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:26:13" (1/1) ... [2022-04-06 16:26:13,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 16:26:13,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 16:26:14,024 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/egcd-ll_valuebound2.c[489,502] [2022-04-06 16:26:14,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:26:14,058 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 16:26:14,066 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/egcd-ll_valuebound2.c[489,502] [2022-04-06 16:26:14,085 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:26:14,094 INFO L208 MainTranslator]: Completed translation [2022-04-06 16:26:14,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:14 WrapperNode [2022-04-06 16:26:14,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 16:26:14,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 16:26:14,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 16:26:14,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 16:26:14,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:14" (1/1) ... [2022-04-06 16:26:14,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:14" (1/1) ... [2022-04-06 16:26:14,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:14" (1/1) ... [2022-04-06 16:26:14,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:14" (1/1) ... [2022-04-06 16:26:14,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:14" (1/1) ... [2022-04-06 16:26:14,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:14" (1/1) ... [2022-04-06 16:26:14,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:14" (1/1) ... [2022-04-06 16:26:14,132 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 16:26:14,133 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 16:26:14,133 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 16:26:14,133 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 16:26:14,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:14" (1/1) ... [2022-04-06 16:26:14,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:26:14,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:14,161 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 16:26:14,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 16:26:14,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 16:26:14,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 16:26:14,197 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 16:26:14,197 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 16:26:14,197 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 16:26:14,198 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 16:26:14,198 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 16:26:14,198 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 16:26:14,198 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 16:26:14,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 16:26:14,198 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 16:26:14,199 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 16:26:14,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 16:26:14,200 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 16:26:14,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 16:26:14,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 16:26:14,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 16:26:14,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 16:26:14,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 16:26:14,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 16:26:14,249 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 16:26:14,250 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 16:26:14,367 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 16:26:14,371 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 16:26:14,371 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 16:26:14,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:26:14 BoogieIcfgContainer [2022-04-06 16:26:14,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 16:26:14,374 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 16:26:14,374 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 16:26:14,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 16:26:14,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:26:13" (1/3) ... [2022-04-06 16:26:14,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5d3c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:26:14, skipping insertion in model container [2022-04-06 16:26:14,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:26:14" (2/3) ... [2022-04-06 16:26:14,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5d3c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:26:14, skipping insertion in model container [2022-04-06 16:26:14,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:26:14" (3/3) ... [2022-04-06 16:26:14,378 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound2.c [2022-04-06 16:26:14,382 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 16:26:14,382 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 16:26:14,409 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 16:26:14,414 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 16:26:14,414 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 16:26:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 16:26:14,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 16:26:14,429 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:14,430 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:14,430 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:14,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:14,434 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2022-04-06 16:26:14,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:14,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2033295027] [2022-04-06 16:26:14,447 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:14,447 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 2 times [2022-04-06 16:26:14,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:14,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373781090] [2022-04-06 16:26:14,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:14,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:26:14,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 16:26:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:26:14,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 16:26:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:26:14,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 16:26:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:26:14,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 16:26:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:26:14,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 16:26:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:26:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:26:14,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:14,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373781090] [2022-04-06 16:26:14,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373781090] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:14,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:14,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:26:14,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:14,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2033295027] [2022-04-06 16:26:14,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2033295027] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:14,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:14,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:26:14,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478513053] [2022-04-06 16:26:14,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:14,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 16:26:14,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:14,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 16:26:14,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:26:14,696 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:26:14,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:14,785 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2022-04-06 16:26:14,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 16:26:14,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-06 16:26:14,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:14,791 INFO L225 Difference]: With dead ends: 67 [2022-04-06 16:26:14,791 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 16:26:14,794 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:26:14,801 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:14,802 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:14,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 16:26:14,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 16:26:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 16:26:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-04-06 16:26:14,836 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2022-04-06 16:26:14,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:14,836 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-04-06 16:26:14,836 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 16:26:14,837 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-04-06 16:26:14,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 16:26:14,838 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:14,839 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:14,840 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 16:26:14,840 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:14,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:14,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2022-04-06 16:26:14,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:14,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [659415874] [2022-04-06 16:26:14,845 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:14,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 2 times [2022-04-06 16:26:14,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:14,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180628058] [2022-04-06 16:26:14,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:14,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:14,882 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:14,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195435226] [2022-04-06 16:26:14,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:26:14,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:14,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:14,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:14,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 16:26:14,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:26:14,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:14,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:26:14,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 16:26:15,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:26:15,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:15,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180628058] [2022-04-06 16:26:15,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:15,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195435226] [2022-04-06 16:26:15,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195435226] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:15,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:15,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:26:15,043 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:15,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [659415874] [2022-04-06 16:26:15,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [659415874] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:15,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:15,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:26:15,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218822559] [2022-04-06 16:26:15,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:15,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:26:15,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:15,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:26:15,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:26:15,046 INFO L87 Difference]: Start difference. First operand 32 states and 42 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:26:15,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:15,104 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-04-06 16:26:15,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:26:15,105 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-04-06 16:26:15,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:15,106 INFO L225 Difference]: With dead ends: 48 [2022-04-06 16:26:15,106 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 16:26:15,106 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:26:15,107 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:15,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 143 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:26:15,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 16:26:15,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-04-06 16:26:15,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 16:26:15,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-04-06 16:26:15,116 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2022-04-06 16:26:15,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:15,116 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-04-06 16:26:15,116 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 16:26:15,116 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-04-06 16:26:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 16:26:15,117 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:15,117 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:15,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:15,335 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 [2022-04-06 16:26:15,336 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:15,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:15,336 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2022-04-06 16:26:15,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:15,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [329932270] [2022-04-06 16:26:15,337 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:15,337 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 2 times [2022-04-06 16:26:15,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:15,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408457069] [2022-04-06 16:26:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:15,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:15,348 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:15,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141590490] [2022-04-06 16:26:15,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:26:15,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:15,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:15,350 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:15,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 16:26:15,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:26:15,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:15,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 16:26:15,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 16:26:15,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:15,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:15,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408457069] [2022-04-06 16:26:15,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:15,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141590490] [2022-04-06 16:26:15,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141590490] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:26:15,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:26:15,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-06 16:26:15,640 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:15,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [329932270] [2022-04-06 16:26:15,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [329932270] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:15,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:15,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:26:15,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859397073] [2022-04-06 16:26:15,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:15,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:26:15,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:15,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:26:15,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:26:15,642 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 16:26:15,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:15,756 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2022-04-06 16:26:15,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:26:15,757 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2022-04-06 16:26:15,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:15,758 INFO L225 Difference]: With dead ends: 52 [2022-04-06 16:26:15,758 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 16:26:15,758 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 16:26:15,759 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:15,759 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 177 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 16:26:15,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-04-06 16:26:15,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 16:26:15,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-04-06 16:26:15,767 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 38 [2022-04-06 16:26:15,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:15,768 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-04-06 16:26:15,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-06 16:26:15,768 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-04-06 16:26:15,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 16:26:15,769 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:15,769 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:15,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:15,985 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 [2022-04-06 16:26:15,985 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:15,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:15,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2022-04-06 16:26:15,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:15,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1891415016] [2022-04-06 16:26:15,986 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:15,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 2 times [2022-04-06 16:26:15,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:15,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547909298] [2022-04-06 16:26:15,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:15,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:15,996 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:15,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566920514] [2022-04-06 16:26:15,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:26:15,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:15,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:15,998 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:16,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 16:26:16,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:26:16,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:16,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 16:26:16,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 16:26:16,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:26:16,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:16,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547909298] [2022-04-06 16:26:16,172 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:16,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566920514] [2022-04-06 16:26:16,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566920514] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:16,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:16,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:26:16,173 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:16,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1891415016] [2022-04-06 16:26:16,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1891415016] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:16,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:16,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:26:16,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322517186] [2022-04-06 16:26:16,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:16,173 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:26:16,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:16,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:26:16,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:26:16,174 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:26:16,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:16,262 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2022-04-06 16:26:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:26:16,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-04-06 16:26:16,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:16,265 INFO L225 Difference]: With dead ends: 74 [2022-04-06 16:26:16,265 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 16:26:16,266 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-06 16:26:16,266 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:16,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 175 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 16:26:16,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-04-06 16:26:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 30 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 16:26:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2022-04-06 16:26:16,278 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 43 [2022-04-06 16:26:16,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:16,278 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2022-04-06 16:26:16,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:26:16,278 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2022-04-06 16:26:16,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 16:26:16,279 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:16,279 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:16,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:16,492 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 [2022-04-06 16:26:16,493 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:16,493 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2022-04-06 16:26:16,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:16,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [69011190] [2022-04-06 16:26:16,494 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:16,494 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 2 times [2022-04-06 16:26:16,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:16,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284419285] [2022-04-06 16:26:16,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:16,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:16,506 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:16,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457427910] [2022-04-06 16:26:16,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:26:16,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:16,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:16,511 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:16,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 16:26:16,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:26:16,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:16,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 16:26:16,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 16:26:16,616 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:26:16,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:16,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284419285] [2022-04-06 16:26:16,616 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:16,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457427910] [2022-04-06 16:26:16,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457427910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:16,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:16,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:26:16,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:16,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [69011190] [2022-04-06 16:26:16,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [69011190] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:16,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:16,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:26:16,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058842829] [2022-04-06 16:26:16,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:16,618 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:26:16,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:16,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:26:16,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:26:16,618 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 16:26:16,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:16,654 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-04-06 16:26:16,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:26:16,655 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2022-04-06 16:26:16,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:16,656 INFO L225 Difference]: With dead ends: 76 [2022-04-06 16:26:16,657 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 16:26:16,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:26:16,657 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 139 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 [2022-04-06 16:26:16,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 139 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:26:16,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 16:26:16,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-04-06 16:26:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 36 states have (on average 1.25) internal successors, (45), 40 states have internal predecessors, (45), 30 states have call successors, (30), 8 states have call predecessors, (30), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 16:26:16,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2022-04-06 16:26:16,668 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 49 [2022-04-06 16:26:16,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:16,668 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2022-04-06 16:26:16,668 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 16:26:16,668 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2022-04-06 16:26:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 16:26:16,669 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:16,669 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:16,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:16,890 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 [2022-04-06 16:26:16,890 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:16,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:16,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 1 times [2022-04-06 16:26:16,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:16,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [796272280] [2022-04-06 16:26:16,891 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:16,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 2 times [2022-04-06 16:26:16,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:16,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541673404] [2022-04-06 16:26:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:16,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:16,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:16,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202872868] [2022-04-06 16:26:16,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:26:16,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:16,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:16,903 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:16,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 16:26:16,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:26:16,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:16,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 16:26:16,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 16:26:17,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:26:17,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:17,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541673404] [2022-04-06 16:26:17,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:17,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202872868] [2022-04-06 16:26:17,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202872868] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:17,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:17,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:26:17,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:17,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [796272280] [2022-04-06 16:26:17,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [796272280] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:17,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:17,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:26:17,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150446362] [2022-04-06 16:26:17,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:17,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:26:17,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:17,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:26:17,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:26:17,051 INFO L87 Difference]: Start difference. First operand 74 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 16:26:17,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:17,087 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2022-04-06 16:26:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:26:17,087 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-04-06 16:26:17,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:17,088 INFO L225 Difference]: With dead ends: 84 [2022-04-06 16:26:17,088 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 16:26:17,089 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:26:17,089 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:17,089 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 146 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:26:17,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 16:26:17,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-04-06 16:26:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 16:26:17,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-04-06 16:26:17,098 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2022-04-06 16:26:17,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:17,099 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-04-06 16:26:17,099 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 16:26:17,099 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-04-06 16:26:17,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 16:26:17,100 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:17,100 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:17,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-06 16:26:17,306 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 [2022-04-06 16:26:17,308 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:17,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:17,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2022-04-06 16:26:17,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:17,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1749358854] [2022-04-06 16:26:17,309 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:17,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 2 times [2022-04-06 16:26:17,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:17,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650674496] [2022-04-06 16:26:17,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:17,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:17,318 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:17,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300063789] [2022-04-06 16:26:17,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:26:17,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:17,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:17,321 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:17,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 16:26:17,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:26:17,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:17,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 16:26:17,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:17,475 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 16:26:17,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 16:26:17,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:17,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650674496] [2022-04-06 16:26:17,589 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:17,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300063789] [2022-04-06 16:26:17,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300063789] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:17,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:17,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 16:26:17,590 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:17,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1749358854] [2022-04-06 16:26:17,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1749358854] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:17,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:17,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:26:17,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993707693] [2022-04-06 16:26:17,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:17,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:26:17,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:17,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:26:17,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:26:17,591 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:26:17,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:17,686 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2022-04-06 16:26:17,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:26:17,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2022-04-06 16:26:17,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:17,687 INFO L225 Difference]: With dead ends: 88 [2022-04-06 16:26:17,687 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 16:26:17,688 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:26:17,688 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:17,688 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 150 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:17,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 16:26:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-04-06 16:26:17,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 16:26:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2022-04-06 16:26:17,698 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2022-04-06 16:26:17,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:17,698 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2022-04-06 16:26:17,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 16:26:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2022-04-06 16:26:17,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 16:26:17,699 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:17,699 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:17,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:17,915 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 [2022-04-06 16:26:17,916 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:17,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 3 times [2022-04-06 16:26:17,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:17,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2047193890] [2022-04-06 16:26:17,917 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:17,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 4 times [2022-04-06 16:26:17,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:17,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091202334] [2022-04-06 16:26:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:17,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:17,938 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:17,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872367183] [2022-04-06 16:26:17,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:26:17,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:17,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:17,944 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:17,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 16:26:17,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:26:17,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:17,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 16:26:17,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 16:26:18,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 16:26:18,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:18,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091202334] [2022-04-06 16:26:18,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:18,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872367183] [2022-04-06 16:26:18,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872367183] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:18,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:18,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2022-04-06 16:26:18,441 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:18,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2047193890] [2022-04-06 16:26:18,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2047193890] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:18,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:18,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:26:18,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129916868] [2022-04-06 16:26:18,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:18,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:26:18,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:18,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:26:18,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:26:18,442 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 16:26:18,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:18,610 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2022-04-06 16:26:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:26:18,611 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2022-04-06 16:26:18,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:18,612 INFO L225 Difference]: With dead ends: 118 [2022-04-06 16:26:18,612 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 16:26:18,612 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:26:18,613 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:18,613 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 194 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 16:26:18,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2022-04-06 16:26:18,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 16:26:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2022-04-06 16:26:18,640 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2022-04-06 16:26:18,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:18,640 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2022-04-06 16:26:18,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 16:26:18,641 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2022-04-06 16:26:18,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 16:26:18,641 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:18,642 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:18,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:18,870 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 [2022-04-06 16:26:18,870 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:18,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:18,871 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 1 times [2022-04-06 16:26:18,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:18,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1884605398] [2022-04-06 16:26:18,871 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:18,871 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2022-04-06 16:26:18,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:18,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723843347] [2022-04-06 16:26:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:18,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:18,880 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:18,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299389458] [2022-04-06 16:26:18,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:26:18,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:18,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:18,891 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:18,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 16:26:18,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:26:18,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:18,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 16:26:18,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 16:26:19,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:19,238 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 16:26:19,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:19,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723843347] [2022-04-06 16:26:19,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:19,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299389458] [2022-04-06 16:26:19,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299389458] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:19,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:19,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 16:26:19,239 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:19,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1884605398] [2022-04-06 16:26:19,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1884605398] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:19,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:19,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:26:19,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788288794] [2022-04-06 16:26:19,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:19,240 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:26:19,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:19,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:26:19,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:26:19,241 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 16:26:19,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:19,332 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2022-04-06 16:26:19,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:26:19,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 61 [2022-04-06 16:26:19,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:19,334 INFO L225 Difference]: With dead ends: 137 [2022-04-06 16:26:19,334 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 16:26:19,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:26:19,334 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:19,335 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 160 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:19,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 16:26:19,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-04-06 16:26:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2022-04-06 16:26:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2022-04-06 16:26:19,347 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2022-04-06 16:26:19,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:19,347 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2022-04-06 16:26:19,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 16:26:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2022-04-06 16:26:19,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 16:26:19,348 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:19,348 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:19,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:19,582 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 [2022-04-06 16:26:19,582 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:19,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2022-04-06 16:26:19,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:19,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [598835694] [2022-04-06 16:26:19,583 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:19,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 2 times [2022-04-06 16:26:19,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:19,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824230477] [2022-04-06 16:26:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:19,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:19,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:19,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152815642] [2022-04-06 16:26:19,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:26:19,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:19,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:19,607 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:19,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 16:26:19,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:26:19,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:19,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 16:26:19,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-04-06 16:26:19,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-04-06 16:26:19,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:19,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824230477] [2022-04-06 16:26:19,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:19,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152815642] [2022-04-06 16:26:19,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152815642] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:19,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:19,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-04-06 16:26:19,926 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:19,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [598835694] [2022-04-06 16:26:19,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [598835694] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:19,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:19,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:26:19,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411567082] [2022-04-06 16:26:19,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:19,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:26:19,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:19,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:26:19,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:26:19,928 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:26:20,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:20,077 INFO L93 Difference]: Finished difference Result 156 states and 197 transitions. [2022-04-06 16:26:20,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:26:20,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-04-06 16:26:20,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:20,078 INFO L225 Difference]: With dead ends: 156 [2022-04-06 16:26:20,078 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 16:26:20,079 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:26:20,080 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 14 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:20,080 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 159 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 16:26:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2022-04-06 16:26:20,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 64 states have (on average 1.109375) internal successors, (71), 68 states have internal predecessors, (71), 36 states have call successors, (36), 15 states have call predecessors, (36), 14 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 16:26:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 140 transitions. [2022-04-06 16:26:20,094 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 140 transitions. Word has length 69 [2022-04-06 16:26:20,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:20,094 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 140 transitions. [2022-04-06 16:26:20,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:26:20,094 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 140 transitions. [2022-04-06 16:26:20,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 16:26:20,095 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:20,095 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:20,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:20,314 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 [2022-04-06 16:26:20,314 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:20,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1872855628, now seen corresponding path program 3 times [2022-04-06 16:26:20,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:20,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1703146393] [2022-04-06 16:26:20,315 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:20,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1872855628, now seen corresponding path program 4 times [2022-04-06 16:26:20,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:20,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028591214] [2022-04-06 16:26:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:20,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:20,323 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:20,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840812855] [2022-04-06 16:26:20,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:26:20,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:20,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:20,325 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:20,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 16:26:20,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:26:20,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:20,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 16:26:20,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-04-06 16:26:20,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-04-06 16:26:20,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:20,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028591214] [2022-04-06 16:26:20,624 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:20,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840812855] [2022-04-06 16:26:20,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840812855] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:20,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:20,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-04-06 16:26:20,625 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:20,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1703146393] [2022-04-06 16:26:20,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1703146393] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:20,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:20,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:26:20,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880281] [2022-04-06 16:26:20,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:20,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:26:20,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:20,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:26:20,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:26:20,626 INFO L87 Difference]: Start difference. First operand 115 states and 140 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:26:20,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:20,720 INFO L93 Difference]: Finished difference Result 133 states and 154 transitions. [2022-04-06 16:26:20,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:26:20,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-04-06 16:26:20,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:20,721 INFO L225 Difference]: With dead ends: 133 [2022-04-06 16:26:20,721 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 16:26:20,721 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:26:20,722 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 13 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:20,722 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 176 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:20,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 16:26:20,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-04-06 16:26:20,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 64 states have internal predecessors, (66), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-04-06 16:26:20,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2022-04-06 16:26:20,732 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 69 [2022-04-06 16:26:20,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:20,732 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2022-04-06 16:26:20,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:26:20,732 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2022-04-06 16:26:20,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 16:26:20,733 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:20,733 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:20,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:20,971 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 [2022-04-06 16:26:20,971 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:20,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 5 times [2022-04-06 16:26:20,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:20,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [770704340] [2022-04-06 16:26:20,972 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:20,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 6 times [2022-04-06 16:26:20,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:20,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677616544] [2022-04-06 16:26:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:20,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:20,979 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:20,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1258071709] [2022-04-06 16:26:20,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:26:20,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:20,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:20,981 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:21,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 16:26:21,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:26:21,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:21,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 16:26:21,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 54 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-04-06 16:26:21,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-04-06 16:26:21,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:21,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677616544] [2022-04-06 16:26:21,433 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:21,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258071709] [2022-04-06 16:26:21,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258071709] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:21,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:21,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-04-06 16:26:21,433 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:21,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [770704340] [2022-04-06 16:26:21,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [770704340] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:21,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:21,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:26:21,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397290668] [2022-04-06 16:26:21,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:21,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:26:21,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:21,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:26:21,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:26:21,434 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 16:26:21,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:21,537 INFO L93 Difference]: Finished difference Result 123 states and 139 transitions. [2022-04-06 16:26:21,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:26:21,537 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2022-04-06 16:26:21,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:21,538 INFO L225 Difference]: With dead ends: 123 [2022-04-06 16:26:21,538 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 16:26:21,538 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:26:21,539 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 10 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:21,539 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 191 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:21,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 16:26:21,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-04-06 16:26:21,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 25 states have call successors, (25), 12 states have call predecessors, (25), 11 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 16:26:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2022-04-06 16:26:21,546 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 74 [2022-04-06 16:26:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:21,546 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2022-04-06 16:26:21,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 16:26:21,546 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2022-04-06 16:26:21,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 16:26:21,547 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:26:21,547 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:26:21,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:21,763 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 [2022-04-06 16:26:21,763 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:26:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:26:21,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2022-04-06 16:26:21,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:21,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [416449591] [2022-04-06 16:26:21,764 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:26:21,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 4 times [2022-04-06 16:26:21,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:26:21,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066575735] [2022-04-06 16:26:21,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:26:21,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:26:21,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:26:21,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458421072] [2022-04-06 16:26:21,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:26:21,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:26:21,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:26:21,772 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:26:21,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 16:26:21,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:26:21,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:26:21,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 16:26:21,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:26:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-04-06 16:26:22,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:26:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-04-06 16:26:22,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:26:22,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066575735] [2022-04-06 16:26:22,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:26:22,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458421072] [2022-04-06 16:26:22,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458421072] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:26:22,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:26:22,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-04-06 16:26:22,325 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:26:22,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [416449591] [2022-04-06 16:26:22,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [416449591] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:26:22,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:26:22,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:26:22,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408254975] [2022-04-06 16:26:22,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:26:22,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:26:22,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:26:22,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:26:22,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:26:22,326 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 16:26:22,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:26:22,418 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2022-04-06 16:26:22,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:26:22,418 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 79 [2022-04-06 16:26:22,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:26:22,419 INFO L225 Difference]: With dead ends: 93 [2022-04-06 16:26:22,419 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 16:26:22,419 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:26:22,420 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:26:22,420 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 131 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:26:22,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 16:26:22,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 16:26:22,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 16:26:22,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 16:26:22,420 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2022-04-06 16:26:22,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:26:22,421 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 16:26:22,421 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-04-06 16:26:22,421 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 16:26:22,421 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 16:26:22,423 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 16:26:22,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 16:26:22,638 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 [2022-04-06 16:26:22,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 16:26:23,720 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2022-04-06 16:26:23,720 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2022-04-06 16:26:23,720 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2022-04-06 16:26:23,720 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2022-04-06 16:26:23,720 INFO L878 garLoopResultBuilder]: At program point L8(line 8) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-04-06 16:26:23,720 INFO L878 garLoopResultBuilder]: At program point L8-2(lines 7 9) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 16:26:23,721 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 7 9) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 16:26:23,721 INFO L878 garLoopResultBuilder]: At program point L35-2(lines 35 52) the Hoare annotation is: (let ((.cse4 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse0 (= main_~s~0 1)) (.cse1 (= main_~a~0 .cse4)) (.cse2 (<= 1 main_~y~0)) (.cse3 (= main_~p~0 1))) (or (and (= main_~b~0 main_~a~0) (<= 1 main_~x~0) .cse0 .cse1 (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 .cse3) (and (= main_~y~0 (+ main_~b~0 main_~x~0)) (= main_~b~0 .cse4) .cse0 .cse1 (= (+ main_~q~0 1) 0) .cse2 (= main_~a~0 main_~x~0) (<= main_~x~0 2) .cse3)))) [2022-04-06 16:26:23,721 INFO L878 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 main_~y~0) (<= 1 main_~x~0) (<= main_~y~0 2) (<= main_~x~0 2)) [2022-04-06 16:26:23,721 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 18 59) the Hoare annotation is: true [2022-04-06 16:26:23,721 INFO L878 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: (let ((.cse1 (<= 1 main_~x~0)) (.cse2 (= main_~s~0 1)) (.cse3 (<= 1 main_~y~0))) (or (let ((.cse0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (and (= main_~y~0 (+ main_~b~0 main_~x~0)) (= main_~b~0 .cse0) .cse1 .cse2 (= main_~a~0 .cse0) (= (+ main_~q~0 1) 0) .cse3 (<= main_~x~0 2))) (and .cse1 .cse2 (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse3))) [2022-04-06 16:26:23,721 INFO L878 garLoopResultBuilder]: At program point L54(line 54) the Hoare annotation is: (let ((.cse4 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (let ((.cse0 (= main_~s~0 1)) (.cse1 (= main_~a~0 .cse4)) (.cse2 (<= 1 main_~y~0)) (.cse3 (= main_~p~0 1))) (or (and (= main_~b~0 main_~a~0) (<= 1 main_~x~0) .cse0 .cse1 (= main_~b~0 main_~y~0) (= main_~q~0 0) .cse2 .cse3) (and (= main_~y~0 (+ main_~b~0 main_~x~0)) (= main_~b~0 .cse4) .cse0 .cse1 (= (+ main_~q~0 1) 0) .cse2 (= main_~a~0 main_~x~0) (<= main_~x~0 2) .cse3)))) [2022-04-06 16:26:23,721 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 18 59) the Hoare annotation is: true [2022-04-06 16:26:23,721 INFO L878 garLoopResultBuilder]: At program point L38(lines 35 52) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 2)) (.cse1 (= main_~s~0 1)) (.cse2 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse3 (<= 1 main_~a~0)) (.cse6 (= main_~q~0 0)) (.cse7 (<= 1 main_~y~0)) (.cse4 (= main_~a~0 main_~x~0)) (.cse8 (<= main_~x~0 2)) (.cse5 (= main_~p~0 1))) (or (and (= main_~y~0 (+ main_~b~0 main_~x~0)) .cse0 .cse1 .cse2 .cse3 (= (+ main_~q~0 1) 0) (< 0 main_~b~0) .cse4 .cse5) (and (<= (+ main_~b~0 main_~a~0) 2) (= (+ main_~r~0 1) 0) .cse1 .cse2 (< 0 main_~a~0) .cse6 (<= 1 main_~b~0) .cse7 .cse8 .cse5) (and .cse0 .cse1 .cse2 .cse3 (= main_~b~0 main_~y~0) .cse6 .cse7 .cse4 .cse8 .cse5))) [2022-04-06 16:26:23,721 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 2)) (.cse1 (= main_~s~0 1)) (.cse2 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse3 (<= 1 main_~a~0)) (.cse6 (= main_~q~0 0)) (.cse7 (<= 1 main_~y~0)) (.cse4 (= main_~a~0 main_~x~0)) (.cse8 (<= main_~x~0 2)) (.cse5 (= main_~p~0 1))) (or (and (= main_~y~0 (+ main_~b~0 main_~x~0)) .cse0 .cse1 .cse2 .cse3 (= (+ main_~q~0 1) 0) (< 0 main_~b~0) .cse4 .cse5) (and (= (+ main_~a~0 main_~y~0) main_~x~0) (= (+ main_~r~0 1) 0) .cse1 (< 0 main_~a~0) .cse6 (<= 1 main_~b~0) .cse7 (< main_~b~0 2) .cse8 .cse5) (and .cse0 .cse1 .cse2 .cse3 (= main_~b~0 main_~y~0) .cse6 .cse7 .cse4 .cse8 .cse5))) [2022-04-06 16:26:23,722 INFO L878 garLoopResultBuilder]: At program point L36-1(line 36) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 2)) (.cse1 (= main_~s~0 1)) (.cse2 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse3 (<= 1 main_~a~0)) (.cse6 (= main_~q~0 0)) (.cse7 (<= 1 main_~y~0)) (.cse4 (= main_~a~0 main_~x~0)) (.cse8 (<= main_~x~0 2)) (.cse5 (= main_~p~0 1))) (or (and (= main_~y~0 (+ main_~b~0 main_~x~0)) .cse0 .cse1 .cse2 .cse3 (= (+ main_~q~0 1) 0) (< 0 main_~b~0) .cse4 .cse5) (and (= (+ main_~a~0 main_~y~0) main_~x~0) (= (+ main_~r~0 1) 0) .cse1 (< 0 main_~a~0) .cse6 (<= 1 main_~b~0) .cse7 (< main_~b~0 2) .cse8 .cse5) (and .cse0 .cse1 .cse2 .cse3 (= main_~b~0 main_~y~0) .cse6 .cse7 .cse4 .cse8 .cse5))) [2022-04-06 16:26:23,722 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 18 59) the Hoare annotation is: true [2022-04-06 16:26:23,722 INFO L878 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (and (<= 1 main_~x~0) (<= main_~y~0 2) (<= 1 main_~y~0) (<= main_~x~0 2)) [2022-04-06 16:26:23,722 INFO L885 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: true [2022-04-06 16:26:23,722 INFO L878 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-04-06 16:26:23,722 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~y~0) (<= main_~y~0 2) (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-04-06 16:26:23,722 INFO L878 garLoopResultBuilder]: At program point L55(line 55) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (= main_~s~0 1)) (.cse2 (= main_~b~0 main_~y~0)) (.cse3 (= main_~q~0 0)) (.cse4 (<= 1 main_~y~0)) (.cse7 (= main_~a~0 main_~x~0)) (.cse5 (= main_~p~0 1))) (or (and (= main_~b~0 main_~a~0) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5) (let ((.cse6 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (and (= main_~y~0 (+ main_~b~0 main_~x~0)) (= main_~b~0 .cse6) .cse1 (= main_~a~0 .cse6) (= (+ main_~q~0 1) 0) .cse4 .cse7 (<= main_~x~0 2) .cse5)) (and (= main_~r~0 0) .cse0 .cse1 .cse2 .cse3 .cse4 .cse7 .cse5))) [2022-04-06 16:26:23,722 INFO L885 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: true [2022-04-06 16:26:23,722 INFO L878 garLoopResultBuilder]: At program point L22-1(line 22) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 2)) [2022-04-06 16:26:23,722 INFO L878 garLoopResultBuilder]: At program point L43(lines 43 51) the Hoare annotation is: (and (<= main_~y~0 2) (= main_~s~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0))) (<= 1 main_~a~0) (= main_~b~0 main_~y~0) (= main_~q~0 0) (<= 1 main_~y~0) (not (= main_~b~0 main_~a~0)) (= main_~a~0 main_~x~0) (<= main_~x~0 2) (= main_~p~0 1)) [2022-04-06 16:26:23,723 INFO L878 garLoopResultBuilder]: At program point L43-2(lines 35 52) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 2)) (.cse1 (= main_~s~0 1)) (.cse2 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse3 (<= 1 main_~a~0)) (.cse6 (= main_~q~0 0)) (.cse7 (<= 1 main_~y~0)) (.cse4 (= main_~a~0 main_~x~0)) (.cse8 (<= main_~x~0 2)) (.cse5 (= main_~p~0 1))) (or (and (= main_~y~0 (+ main_~b~0 main_~x~0)) .cse0 .cse1 .cse2 .cse3 (= (+ main_~q~0 1) 0) (< 0 main_~b~0) .cse4 .cse5) (and (= (+ main_~a~0 main_~y~0) main_~x~0) (= (+ main_~r~0 1) 0) .cse1 (< 0 main_~a~0) .cse6 (<= 1 main_~b~0) .cse7 (< main_~b~0 2) .cse8 .cse5) (and .cse0 .cse1 .cse2 .cse3 (= main_~b~0 main_~y~0) .cse6 .cse7 .cse4 .cse8 .cse5))) [2022-04-06 16:26:23,723 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 2)) (.cse1 (= main_~s~0 1)) (.cse2 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~p~0 main_~x~0)))) (.cse3 (<= 1 main_~a~0)) (.cse6 (= main_~q~0 0)) (.cse7 (<= 1 main_~y~0)) (.cse4 (= main_~a~0 main_~x~0)) (.cse8 (<= main_~x~0 2)) (.cse5 (= main_~p~0 1))) (or (and (= main_~y~0 (+ main_~b~0 main_~x~0)) .cse0 .cse1 .cse2 .cse3 (= (+ main_~q~0 1) 0) (< 0 main_~b~0) .cse4 .cse5) (and (<= (+ main_~b~0 main_~a~0) 2) (= (+ main_~r~0 1) 0) .cse1 .cse2 (< 0 main_~a~0) .cse6 (<= 1 main_~b~0) .cse7 .cse8 .cse5) (and .cse0 .cse1 .cse2 .cse3 (= main_~b~0 main_~y~0) .cse6 .cse7 .cse4 .cse8 .cse5))) [2022-04-06 16:26:23,723 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 16:26:23,723 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 16:26:23,723 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 16:26:23,723 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 16:26:23,723 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 16:26:23,723 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 16:26:23,723 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 16:26:23,723 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2022-04-06 16:26:23,723 INFO L878 garLoopResultBuilder]: At program point L12(lines 12 13) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 16:26:23,723 INFO L878 garLoopResultBuilder]: At program point L11(lines 11 14) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 16:26:23,724 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 10 16) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 16:26:23,724 INFO L878 garLoopResultBuilder]: At program point L11-2(lines 10 16) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 16:26:23,724 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 16:26:23,726 INFO L719 BasicCegarLoop]: Path program histogram: [6, 4, 4, 2, 2, 2, 2, 2, 2] [2022-04-06 16:26:23,727 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 16:26:23,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 04:26:23 BoogieIcfgContainer [2022-04-06 16:26:23,737 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 16:26:23,738 INFO L158 Benchmark]: Toolchain (without parser) took 9892.78ms. Allocated memory was 177.2MB in the beginning and 255.9MB in the end (delta: 78.6MB). Free memory was 126.2MB in the beginning and 194.8MB in the end (delta: -68.6MB). Peak memory consumption was 117.8MB. Max. memory is 8.0GB. [2022-04-06 16:26:23,738 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 177.2MB. Free memory was 142.4MB in the beginning and 142.4MB in the end (delta: 69.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 16:26:23,738 INFO L158 Benchmark]: CACSL2BoogieTranslator took 248.42ms. Allocated memory was 177.2MB in the beginning and 212.9MB in the end (delta: 35.7MB). Free memory was 126.0MB in the beginning and 188.9MB in the end (delta: -62.9MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. [2022-04-06 16:26:23,738 INFO L158 Benchmark]: Boogie Preprocessor took 35.25ms. Allocated memory is still 212.9MB. Free memory was 188.9MB in the beginning and 187.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 16:26:23,738 INFO L158 Benchmark]: RCFGBuilder took 240.10ms. Allocated memory is still 212.9MB. Free memory was 187.1MB in the beginning and 176.3MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 16:26:23,739 INFO L158 Benchmark]: TraceAbstraction took 9363.25ms. Allocated memory was 212.9MB in the beginning and 255.9MB in the end (delta: 43.0MB). Free memory was 175.9MB in the beginning and 194.8MB in the end (delta: -18.9MB). Peak memory consumption was 132.3MB. Max. memory is 8.0GB. [2022-04-06 16:26:23,741 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 177.2MB. Free memory was 142.4MB in the beginning and 142.4MB in the end (delta: 69.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 248.42ms. Allocated memory was 177.2MB in the beginning and 212.9MB in the end (delta: 35.7MB). Free memory was 126.0MB in the beginning and 188.9MB in the end (delta: -62.9MB). Peak memory consumption was 10.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.25ms. Allocated memory is still 212.9MB. Free memory was 188.9MB in the beginning and 187.5MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 240.10ms. Allocated memory is still 212.9MB. Free memory was 187.1MB in the beginning and 176.3MB in the end (delta: 10.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 9363.25ms. Allocated memory was 212.9MB in the beginning and 255.9MB in the end (delta: 43.0MB). Free memory was 175.9MB in the beginning and 194.8MB in the end (delta: -18.9MB). Peak memory consumption was 132.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.3s, OverallIterations: 13, TraceHistogramMax: 9, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 229 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 155 mSDsluCounter, 1980 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1462 mSDsCounter, 102 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1380 IncrementalHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 102 mSolverCounterUnsat, 518 mSDtfsCounter, 1380 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1176 GetRequests, 1051 SyntacticMatches, 6 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=9, InterpolantAutomatonStates: 92, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 12 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 37 LocationsWithAnnotation, 409 PreInvPairs, 510 NumberOfFragments, 1034 HoareAnnotationTreeSize, 409 FomulaSimplifications, 252 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 37 FomulaSimplificationsInter, 852 FormulaSimplificationTreeSizeReductionInter, 1.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((((((y == b + x && y <= 2) && s == 1) && a == y * r + p * x) && 1 <= a) && q + 1 == 0) && 0 < b) && a == x) && p == 1) || (((((((((a + y == x && r + 1 == 0) && s == 1) && 0 < a) && q == 0) && 1 <= b) && 1 <= y) && b < 2) && x <= 2) && p == 1)) || (((((((((y <= 2 && s == 1) && a == y * r + p * x) && 1 <= a) && b == y) && q == 0) && 1 <= y) && a == x) && x <= 2) && p == 1) - ProcedureContractResult [Line: 7]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 18]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 10]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-04-06 16:26:23,759 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...