/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/hard2_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 17:29:45,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 17:29:45,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 17:29:45,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 17:29:45,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 17:29:45,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 17:29:45,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 17:29:45,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 17:29:45,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 17:29:45,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 17:29:45,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 17:29:45,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 17:29:45,130 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 17:29:45,131 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 17:29:45,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 17:29:45,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 17:29:45,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 17:29:45,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 17:29:45,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 17:29:45,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 17:29:45,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 17:29:45,146 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 17:29:45,152 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 17:29:45,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 17:29:45,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 17:29:45,153 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 17:29:45,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 17:29:45,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 17:29:45,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 17:29:45,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 17:29:45,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 17:29:45,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 17:29:45,155 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 17:29:45,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 17:29:45,155 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 17:29:45,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 17:29:45,155 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 17:29:45,155 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 17:29:45,156 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 17:29:45,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 17:29:45,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 17:29:45,156 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 17:29:45,156 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 17:29:45,156 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 17:29:45,156 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 17:29:45,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 17:29:45,157 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 17:29:45,157 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 17:29:45,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 17:29:45,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 17:29:45,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 17:29:45,362 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 17:29:45,363 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 17:29:45,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound1.c [2022-04-06 17:29:45,412 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbb745f43/97512a983ff44069be0fc5835cae2656/FLAG046623723 [2022-04-06 17:29:45,698 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 17:29:45,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound1.c [2022-04-06 17:29:45,705 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbb745f43/97512a983ff44069be0fc5835cae2656/FLAG046623723 [2022-04-06 17:29:46,137 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbb745f43/97512a983ff44069be0fc5835cae2656 [2022-04-06 17:29:46,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 17:29:46,140 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 17:29:46,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 17:29:46,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 17:29:46,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 17:29:46,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:29:46" (1/1) ... [2022-04-06 17:29:46,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e125210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:46, skipping insertion in model container [2022-04-06 17:29:46,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:29:46" (1/1) ... [2022-04-06 17:29:46,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 17:29:46,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 17:29:46,270 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound1.c[526,539] [2022-04-06 17:29:46,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 17:29:46,298 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 17:29:46,308 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound1.c[526,539] [2022-04-06 17:29:46,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 17:29:46,332 INFO L208 MainTranslator]: Completed translation [2022-04-06 17:29:46,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:46 WrapperNode [2022-04-06 17:29:46,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 17:29:46,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 17:29:46,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 17:29:46,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 17:29:46,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:46" (1/1) ... [2022-04-06 17:29:46,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:46" (1/1) ... [2022-04-06 17:29:46,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:46" (1/1) ... [2022-04-06 17:29:46,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:46" (1/1) ... [2022-04-06 17:29:46,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:46" (1/1) ... [2022-04-06 17:29:46,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:46" (1/1) ... [2022-04-06 17:29:46,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:46" (1/1) ... [2022-04-06 17:29:46,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 17:29:46,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 17:29:46,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 17:29:46,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 17:29:46,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:46" (1/1) ... [2022-04-06 17:29:46,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 17:29:46,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:29:46,407 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 17:29:46,427 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 17:29:46,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 17:29:46,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 17:29:46,445 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 17:29:46,445 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 17:29:46,445 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 17:29:46,445 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 17:29:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 17:29:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 17:29:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 17:29:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 17:29:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 17:29:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 17:29:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 17:29:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 17:29:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 17:29:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 17:29:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 17:29:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 17:29:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 17:29:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 17:29:46,497 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 17:29:46,499 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 17:29:46,617 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 17:29:46,621 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 17:29:46,621 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 17:29:46,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:29:46 BoogieIcfgContainer [2022-04-06 17:29:46,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 17:29:46,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 17:29:46,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 17:29:46,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 17:29:46,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 05:29:46" (1/3) ... [2022-04-06 17:29:46,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d75cbe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:29:46, skipping insertion in model container [2022-04-06 17:29:46,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:29:46" (2/3) ... [2022-04-06 17:29:46,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d75cbe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:29:46, skipping insertion in model container [2022-04-06 17:29:46,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:29:46" (3/3) ... [2022-04-06 17:29:46,628 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound1.c [2022-04-06 17:29:46,631 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 17:29:46,631 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 17:29:46,687 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 17:29:46,692 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 17:29:46,692 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 17:29:46,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 17:29:46,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 17:29:46,705 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:29:46,705 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:29:46,706 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:29:46,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:29:46,715 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2022-04-06 17:29:46,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:46,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [631648997] [2022-04-06 17:29:46,738 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:29:46,738 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 2 times [2022-04-06 17:29:46,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:29:46,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78429919] [2022-04-06 17:29:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:29:46,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:29:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:29:46,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 17:29:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:29:46,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 17:29:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:29:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 17:29:46,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:29:46,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78429919] [2022-04-06 17:29:46,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78429919] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:29:46,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:29:46,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 17:29:46,892 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:29:46,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [631648997] [2022-04-06 17:29:46,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [631648997] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:29:46,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:29:46,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 17:29:46,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460102594] [2022-04-06 17:29:46,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:29:46,901 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 17:29:46,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:46,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 17:29:46,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 17:29:46,934 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 17:29:46,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:29:46,996 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2022-04-06 17:29:46,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 17:29:46,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 17:29:46,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:29:47,002 INFO L225 Difference]: With dead ends: 61 [2022-04-06 17:29:47,002 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 17:29:47,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 17:29:47,007 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:29:47,007 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:29:47,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 17:29:47,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 17:29:47,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 17:29:47,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-04-06 17:29:47,041 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-04-06 17:29:47,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:29:47,041 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-04-06 17:29:47,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 17:29:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-04-06 17:29:47,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 17:29:47,047 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:29:47,047 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:29:47,048 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 17:29:47,048 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:29:47,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:29:47,049 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2022-04-06 17:29:47,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:47,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1715519301] [2022-04-06 17:29:47,050 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:29:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 2 times [2022-04-06 17:29:47,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:29:47,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746580093] [2022-04-06 17:29:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:29:47,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:29:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:29:47,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 17:29:47,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:29:47,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 17:29:47,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:29:47,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 17:29:47,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:29:47,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746580093] [2022-04-06 17:29:47,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746580093] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:29:47,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:29:47,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:29:47,124 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:29:47,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1715519301] [2022-04-06 17:29:47,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1715519301] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:29:47,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:29:47,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:29:47,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303909573] [2022-04-06 17:29:47,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:29:47,125 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 17:29:47,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:47,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 17:29:47,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 17:29:47,126 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 17:29:47,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:29:47,302 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-04-06 17:29:47,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 17:29:47,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 17:29:47,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:29:47,304 INFO L225 Difference]: With dead ends: 43 [2022-04-06 17:29:47,304 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 17:29:47,304 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 17:29:47,305 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:29:47,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:29:47,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 17:29:47,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-04-06 17:29:47,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 17:29:47,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-04-06 17:29:47,314 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-04-06 17:29:47,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:29:47,314 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-04-06 17:29:47,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 17:29:47,315 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-04-06 17:29:47,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 17:29:47,318 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:29:47,318 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:29:47,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 17:29:47,319 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:29:47,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:29:47,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2022-04-06 17:29:47,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:47,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1402040808] [2022-04-06 17:29:47,327 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:29:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 2 times [2022-04-06 17:29:47,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:29:47,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643672685] [2022-04-06 17:29:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:29:47,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:29:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:29:47,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 17:29:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:29:47,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 17:29:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:29:47,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 17:29:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:29:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 17:29:47,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:29:47,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643672685] [2022-04-06 17:29:47,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643672685] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:29:47,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:29:47,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:29:47,399 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:29:47,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1402040808] [2022-04-06 17:29:47,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1402040808] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:29:47,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:29:47,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:29:47,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794543983] [2022-04-06 17:29:47,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:29:47,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 17:29:47,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:47,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 17:29:47,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 17:29:47,400 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 17:29:47,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:29:47,530 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-04-06 17:29:47,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 17:29:47,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 17:29:47,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:29:47,533 INFO L225 Difference]: With dead ends: 47 [2022-04-06 17:29:47,533 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 17:29:47,535 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 17:29:47,537 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:29:47,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:29:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 17:29:47,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-04-06 17:29:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 17:29:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-04-06 17:29:47,554 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-04-06 17:29:47,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:29:47,554 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-04-06 17:29:47,554 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 17:29:47,554 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-04-06 17:29:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 17:29:47,555 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:29:47,555 INFO L499 BasicCegarLoop]: trace histogram [3, 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 17:29:47,555 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 17:29:47,555 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:29:47,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:29:47,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2022-04-06 17:29:47,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:47,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [331016823] [2022-04-06 17:29:47,556 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:29:47,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 2 times [2022-04-06 17:29:47,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:29:47,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732191784] [2022-04-06 17:29:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:29:47,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:29:47,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:29:47,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568355577] [2022-04-06 17:29:47,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:29:47,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:29:47,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:29:47,588 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 17:29:47,589 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 17:29:47,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:29:47,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:29:47,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 17:29:47,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:29:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 17:29:47,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 17:29:47,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:29:47,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732191784] [2022-04-06 17:29:47,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:29:47,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568355577] [2022-04-06 17:29:47,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568355577] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:29:47,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:29:47,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:29:47,801 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:29:47,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [331016823] [2022-04-06 17:29:47,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [331016823] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:29:47,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:29:47,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:29:47,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149755366] [2022-04-06 17:29:47,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:29:47,802 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 17:29:47,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:47,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 17:29:47,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 17:29:47,803 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 17:29:47,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:29:47,850 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-04-06 17:29:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 17:29:47,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-04-06 17:29:47,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:29:47,851 INFO L225 Difference]: With dead ends: 66 [2022-04-06 17:29:47,851 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 17:29:47,851 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 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 17:29:47,852 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:29:47,852 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:29:47,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 17:29:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 17:29:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 17:29:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-04-06 17:29:47,860 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2022-04-06 17:29:47,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:29:47,860 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-04-06 17:29:47,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 17:29:47,860 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-04-06 17:29:47,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 17:29:47,861 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:29:47,861 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:29:47,881 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 17:29:48,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:29:48,080 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:29:48,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:29:48,080 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2022-04-06 17:29:48,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:48,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1773144682] [2022-04-06 17:29:48,081 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:29:48,081 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 2 times [2022-04-06 17:29:48,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:29:48,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721169080] [2022-04-06 17:29:48,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:29:48,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:29:48,089 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:29:48,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217083229] [2022-04-06 17:29:48,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:29:48,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:29:48,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:29:48,090 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 17:29:48,096 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 17:29:48,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:29:48,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:29:48,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 17:29:48,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:29:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 17:29:48,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 17:29:48,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:29:48,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721169080] [2022-04-06 17:29:48,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:29:48,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217083229] [2022-04-06 17:29:48,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217083229] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:29:48,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:29:48,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:29:48,230 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:29:48,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1773144682] [2022-04-06 17:29:48,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1773144682] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:29:48,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:29:48,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:29:48,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973057607] [2022-04-06 17:29:48,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:29:48,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 17:29:48,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:48,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 17:29:48,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 17:29:48,232 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 17:29:48,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:29:48,278 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2022-04-06 17:29:48,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 17:29:48,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-04-06 17:29:48,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:29:48,279 INFO L225 Difference]: With dead ends: 65 [2022-04-06 17:29:48,280 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 17:29:48,280 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 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 17:29:48,280 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:29:48,281 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 103 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:29:48,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 17:29:48,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-04-06 17:29:48,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 17:29:48,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-04-06 17:29:48,288 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2022-04-06 17:29:48,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:29:48,288 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-04-06 17:29:48,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 17:29:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-04-06 17:29:48,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 17:29:48,289 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:29:48,289 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:29:48,307 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 17:29:48,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:29:48,504 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:29:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:29:48,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 1 times [2022-04-06 17:29:48,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:48,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [220652135] [2022-04-06 17:29:48,519 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:29:48,520 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:29:48,520 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:29:48,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 2 times [2022-04-06 17:29:48,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:29:48,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008673206] [2022-04-06 17:29:48,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:29:48,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:29:48,527 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:29:48,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380357014] [2022-04-06 17:29:48,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:29:48,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:29:48,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:29:48,528 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 17:29:48,529 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 17:29:48,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:29:48,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:29:48,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 17:29:48,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:29:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 17:29:48,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:29:48,823 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 17:29:48,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:29:48,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008673206] [2022-04-06 17:29:48,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:29:48,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380357014] [2022-04-06 17:29:48,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380357014] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 17:29:48,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 17:29:48,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 17:29:48,824 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:29:48,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [220652135] [2022-04-06 17:29:48,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [220652135] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:29:48,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:29:48,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:29:48,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986298368] [2022-04-06 17:29:48,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:29:48,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 17:29:48,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:48,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 17:29:48,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 17:29:48,826 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 17:29:48,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:29:48,864 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2022-04-06 17:29:48,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 17:29:48,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-04-06 17:29:48,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:29:48,866 INFO L225 Difference]: With dead ends: 69 [2022-04-06 17:29:48,866 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 17:29:48,867 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 17:29:48,867 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:29:48,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 112 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:29:48,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 17:29:48,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-04-06 17:29:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 17:29:48,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-04-06 17:29:48,875 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 44 [2022-04-06 17:29:48,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:29:48,876 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-04-06 17:29:48,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 17:29:48,876 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-04-06 17:29:48,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 17:29:48,877 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:29:48,877 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:29:48,905 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 17:29:49,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:29:49,091 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:29:49,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:29:49,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 1 times [2022-04-06 17:29:49,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:49,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1284057561] [2022-04-06 17:29:49,098 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:29:49,098 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:29:49,098 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:29:49,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 2 times [2022-04-06 17:29:49,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:29:49,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154522139] [2022-04-06 17:29:49,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:29:49,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:29:49,107 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:29:49,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061300551] [2022-04-06 17:29:49,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:29:49,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:29:49,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:29:49,108 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 17:29:49,109 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 17:29:49,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:29:49,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:29:49,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 17:29:49,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:29:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 17:29:49,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:29:50,128 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 17:29:50,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:29:50,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154522139] [2022-04-06 17:29:50,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:29:50,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061300551] [2022-04-06 17:29:50,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061300551] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:29:50,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:29:50,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 17:29:50,130 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:29:50,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1284057561] [2022-04-06 17:29:50,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1284057561] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:29:50,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:29:50,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 17:29:50,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882861776] [2022-04-06 17:29:50,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:29:50,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 17:29:50,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:50,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 17:29:50,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 17:29:50,132 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 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 17:29:50,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:29:50,260 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2022-04-06 17:29:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 17:29:50,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 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 64 [2022-04-06 17:29:50,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:29:50,262 INFO L225 Difference]: With dead ends: 130 [2022-04-06 17:29:50,262 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 17:29:50,266 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-06 17:29:50,266 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 11 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:29:50,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 172 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:29:50,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 17:29:50,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-04-06 17:29:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 25 states have call successors, (25), 14 states have call predecessors, (25), 13 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 17:29:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2022-04-06 17:29:50,287 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 64 [2022-04-06 17:29:50,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:29:50,287 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2022-04-06 17:29:50,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 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 17:29:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2022-04-06 17:29:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 17:29:50,289 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:29:50,289 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:29:50,310 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 17:29:50,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:29:50,495 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:29:50,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:29:50,496 INFO L85 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 3 times [2022-04-06 17:29:50,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:50,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [793372596] [2022-04-06 17:29:50,499 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:29:50,499 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:29:50,499 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:29:50,499 INFO L85 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 4 times [2022-04-06 17:29:50,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:29:50,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802162170] [2022-04-06 17:29:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:29:50,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:29:50,506 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:29:50,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548463787] [2022-04-06 17:29:50,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 17:29:50,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:29:50,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:29:50,507 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 17:29:50,533 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 17:29:50,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 17:29:50,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:29:50,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 17:29:50,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:29:50,735 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 17:29:50,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:29:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 17:29:51,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:29:51,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802162170] [2022-04-06 17:29:51,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:29:51,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548463787] [2022-04-06 17:29:51,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548463787] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:29:51,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:29:51,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 17:29:51,709 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:29:51,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [793372596] [2022-04-06 17:29:51,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [793372596] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:29:51,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:29:51,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:29:51,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424959961] [2022-04-06 17:29:51,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:29:51,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 17:29:51,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:51,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 17:29:51,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 17:29:51,712 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 17:29:51,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:29:51,814 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2022-04-06 17:29:51,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 17:29:51,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2022-04-06 17:29:51,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:29:51,815 INFO L225 Difference]: With dead ends: 126 [2022-04-06 17:29:51,815 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 17:29:51,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 17:29:51,816 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:29:51,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 175 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:29:51,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 17:29:51,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-06 17:29:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 66 states have internal predecessors, (69), 26 states have call successors, (26), 15 states have call predecessors, (26), 14 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 17:29:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-04-06 17:29:51,825 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 69 [2022-04-06 17:29:51,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:29:51,825 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-04-06 17:29:51,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 17:29:51,826 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-04-06 17:29:51,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 17:29:51,826 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:29:51,826 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:29:51,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 17:29:52,047 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:29:52,048 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:29:52,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:29:52,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 1 times [2022-04-06 17:29:52,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:52,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [646058810] [2022-04-06 17:29:52,054 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:29:52,054 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:29:52,054 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:29:52,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 2 times [2022-04-06 17:29:52,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:29:52,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725431505] [2022-04-06 17:29:52,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:29:52,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:29:52,061 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:29:52,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124391662] [2022-04-06 17:29:52,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:29:52,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:29:52,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:29:52,062 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 17:29:52,063 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 17:29:52,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:29:52,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:29:52,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 17:29:52,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:29:52,435 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 62 proven. 30 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-04-06 17:29:52,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:29:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-04-06 17:29:52,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:29:52,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725431505] [2022-04-06 17:29:52,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:29:52,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124391662] [2022-04-06 17:29:52,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124391662] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:29:52,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:29:52,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 17:29:52,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:29:52,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [646058810] [2022-04-06 17:29:52,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [646058810] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:29:52,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:29:52,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 17:29:52,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536158752] [2022-04-06 17:29:52,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:29:52,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 17:29:52,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:52,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 17:29:52,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-04-06 17:29:52,645 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 17:29:52,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:29:52,856 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2022-04-06 17:29:52,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 17:29:52,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2022-04-06 17:29:52,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:29:52,858 INFO L225 Difference]: With dead ends: 109 [2022-04-06 17:29:52,858 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 17:29:52,858 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-04-06 17:29:52,858 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 16 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 17:29:52,859 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 144 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 17:29:52,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 17:29:52,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-04-06 17:29:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.125) internal successors, (54), 51 states have internal predecessors, (54), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 17:29:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2022-04-06 17:29:52,868 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 75 [2022-04-06 17:29:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:29:52,869 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2022-04-06 17:29:52,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 17:29:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2022-04-06 17:29:52,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 17:29:52,871 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:29:52,871 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:29:52,891 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 17:29:53,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:29:53,088 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:29:53,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:29:53,088 INFO L85 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 5 times [2022-04-06 17:29:53,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:29:53,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1185516426] [2022-04-06 17:29:53,091 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:29:53,091 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:29:53,091 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:29:53,091 INFO L85 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 6 times [2022-04-06 17:29:53,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:29:53,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588408398] [2022-04-06 17:29:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:29:53,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:29:53,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:29:53,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105639402] [2022-04-06 17:29:53,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 17:29:53,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:29:53,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:29:53,099 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 17:29:53,100 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 17:29:53,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 17:29:53,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:29:53,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 17:29:53,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:29:53,419 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 17:29:53,433 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 17:29:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 17:29:53,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:30:24,452 WARN L232 SmtUtils]: Spent 13.19s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 17:31:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 17:31:14,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:31:14,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588408398] [2022-04-06 17:31:14,613 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:31:14,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105639402] [2022-04-06 17:31:14,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105639402] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:31:14,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:31:14,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2022-04-06 17:31:14,614 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:31:14,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1185516426] [2022-04-06 17:31:14,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1185516426] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:31:14,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:31:14,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 17:31:14,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870681167] [2022-04-06 17:31:14,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:31:14,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 17:31:14,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:14,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 17:31:14,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=181, Unknown=2, NotChecked=0, Total=240 [2022-04-06 17:31:14,615 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 17:31:14,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:31:14,770 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2022-04-06 17:31:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 17:31:14,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 81 [2022-04-06 17:31:14,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:31:14,771 INFO L225 Difference]: With dead ends: 106 [2022-04-06 17:31:14,771 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 17:31:14,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=70, Invalid=234, Unknown=2, NotChecked=0, Total=306 [2022-04-06 17:31:14,772 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:31:14,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 105 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:31:14,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 17:31:14,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2022-04-06 17:31:14,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 17:31:14,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2022-04-06 17:31:14,790 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 81 [2022-04-06 17:31:14,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:31:14,790 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2022-04-06 17:31:14,790 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 17:31:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2022-04-06 17:31:14,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 17:31:14,791 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:31:14,791 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:31:14,811 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 17:31:15,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:31:15,008 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:31:15,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:31:15,008 INFO L85 PathProgramCache]: Analyzing trace with hash -454578581, now seen corresponding path program 7 times [2022-04-06 17:31:15,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:15,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [464353486] [2022-04-06 17:31:15,010 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:31:15,010 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:31:15,011 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:31:15,011 INFO L85 PathProgramCache]: Analyzing trace with hash -454578581, now seen corresponding path program 8 times [2022-04-06 17:31:15,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:31:15,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253684263] [2022-04-06 17:31:15,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:31:15,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:31:15,022 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:31:15,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458607180] [2022-04-06 17:31:15,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:31:15,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:31:15,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:31:15,032 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 17:31:15,032 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 17:31:15,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:31:15,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:31:15,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 17:31:15,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:31:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-04-06 17:31:15,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 17:31:15,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:31:15,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253684263] [2022-04-06 17:31:15,226 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:31:15,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458607180] [2022-04-06 17:31:15,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458607180] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:31:15,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:31:15,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 17:31:15,227 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:31:15,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [464353486] [2022-04-06 17:31:15,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [464353486] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:31:15,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:31:15,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 17:31:15,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462768975] [2022-04-06 17:31:15,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:31:15,228 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 17:31:15,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:15,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 17:31:15,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-04-06 17:31:15,228 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 17:31:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:31:15,290 INFO L93 Difference]: Finished difference Result 91 states and 107 transitions. [2022-04-06 17:31:15,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 17:31:15,291 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-04-06 17:31:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:31:15,291 INFO L225 Difference]: With dead ends: 91 [2022-04-06 17:31:15,291 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 17:31:15,292 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-04-06 17:31:15,292 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:31:15,292 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 103 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:31:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 17:31:15,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 17:31:15,293 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 17:31:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 17:31:15,293 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2022-04-06 17:31:15,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:31:15,293 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 17:31:15,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 17:31:15,293 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 17:31:15,293 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 17:31:15,295 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 17:31:15,317 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 17:31:15,511 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 17:31:15,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 17:31:16,095 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-04-06 17:31:16,095 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-04-06 17:31:16,095 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-04-06 17:31:16,095 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-04-06 17:31:16,095 INFO L878 garLoopResultBuilder]: At program point L12(line 12) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-04-06 17:31:16,095 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 13) 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 17:31:16,095 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 11 13) 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 17:31:16,095 INFO L878 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: (and (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) [2022-04-06 17:31:16,095 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 61) the Hoare annotation is: true [2022-04-06 17:31:16,095 INFO L878 garLoopResultBuilder]: At program point L52(lines 52 55) the Hoare annotation is: (and (= main_~A~0 main_~r~0) (= main_~q~0 0) (= main_~B~0 1) (= main_~B~0 main_~d~0) (= main_~p~0 1)) [2022-04-06 17:31:16,095 INFO L878 garLoopResultBuilder]: At program point L52-2(lines 22 61) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse3 (= main_~B~0 main_~d~0)) (.cse4 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse1 .cse2) (and .cse2 (= main_~q~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0) .cse3 .cse4))) [2022-04-06 17:31:16,095 INFO L878 garLoopResultBuilder]: At program point L46(lines 44 56) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse3 (= main_~B~0 main_~d~0)) (.cse4 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse1 .cse2) (and .cse2 (= main_~q~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0) .cse3 .cse4))) [2022-04-06 17:31:16,096 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 61) the Hoare annotation is: true [2022-04-06 17:31:16,096 INFO L878 garLoopResultBuilder]: At program point L44-1(lines 44 56) the Hoare annotation is: (let ((.cse0 (= main_~B~0 1)) (.cse1 (= main_~B~0 main_~d~0)) (.cse2 (= main_~p~0 1))) (or (and (= main_~A~0 main_~r~0) (= main_~q~0 0) .cse0 .cse1 .cse2) (and (= (+ main_~d~0 main_~r~0) main_~A~0) .cse0 (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0) .cse1 .cse2))) [2022-04-06 17:31:16,096 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (<= 0 main_~A~0)) (.cse1 (= main_~A~0 main_~r~0)) (.cse2 (<= main_~A~0 1)) (.cse3 (= main_~q~0 0)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and .cse0 .cse1 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse2 .cse3 .cse4))) [2022-04-06 17:31:16,096 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 42) the Hoare annotation is: (let ((.cse0 (<= 0 main_~A~0)) (.cse1 (= main_~A~0 main_~r~0)) (.cse2 (<= main_~A~0 1)) (.cse3 (= main_~q~0 0)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and .cse0 .cse1 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse2 .cse3 .cse4))) [2022-04-06 17:31:16,096 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 61) the Hoare annotation is: true [2022-04-06 17:31:16,096 INFO L885 garLoopResultBuilder]: At program point L59(line 59) the Hoare annotation is: true [2022-04-06 17:31:16,096 INFO L885 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: true [2022-04-06 17:31:16,096 INFO L878 garLoopResultBuilder]: At program point L26-1(line 26) the Hoare annotation is: (and (<= 0 main_~A~0) (<= main_~A~0 1)) [2022-04-06 17:31:16,096 INFO L878 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse3 (= main_~B~0 main_~d~0)) (.cse4 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse1 .cse2) (and .cse2 (= main_~q~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0) .cse3 .cse4))) [2022-04-06 17:31:16,096 INFO L878 garLoopResultBuilder]: At program point L45-1(line 45) the Hoare annotation is: (let ((.cse0 (= main_~A~0 main_~r~0)) (.cse1 (= main_~q~0 0)) (.cse2 (= main_~B~0 1)) (.cse3 (= main_~B~0 main_~d~0)) (.cse4 (= main_~p~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse0 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse1 .cse2) (and .cse2 (= main_~q~0 1) (= (+ (* main_~B~0 main_~q~0) main_~r~0) main_~A~0) .cse3 .cse4))) [2022-04-06 17:31:16,096 INFO L878 garLoopResultBuilder]: At program point L37(lines 34 42) the Hoare annotation is: (let ((.cse0 (<= 0 main_~A~0)) (.cse1 (= main_~A~0 main_~r~0)) (.cse2 (<= main_~A~0 1)) (.cse3 (= main_~q~0 0)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and .cse0 .cse1 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse2 .cse3 .cse4))) [2022-04-06 17:31:16,096 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (<= 0 main_~A~0)) (.cse1 (= main_~A~0 main_~r~0)) (.cse2 (<= main_~A~0 1)) (.cse3 (= main_~q~0 0)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and .cse0 .cse1 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse2 .cse3 .cse4))) [2022-04-06 17:31:16,096 INFO L878 garLoopResultBuilder]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse0 (<= 0 main_~A~0)) (.cse1 (= main_~A~0 main_~r~0)) (.cse2 (<= main_~A~0 1)) (.cse3 (= main_~q~0 0)) (.cse4 (= main_~B~0 1))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 (= main_~B~0 main_~d~0) (= main_~p~0 1)) (and .cse0 .cse1 (= (* main_~B~0 2) main_~d~0) (= main_~p~0 2) .cse2 .cse3 .cse4))) [2022-04-06 17:31:16,096 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 17:31:16,096 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 17:31:16,096 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 17:31:16,097 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 17:31:16,097 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 17:31:16,097 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 17:31:16,097 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 17:31:16,097 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 17:31:16,097 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 17:31:16,097 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-06 17:31:16,097 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 17:31:16,097 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 17:31:16,097 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 17:31:16,099 INFO L719 BasicCegarLoop]: Path program histogram: [8, 2, 2, 2, 2, 2, 2, 2] [2022-04-06 17:31:16,100 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 17:31:16,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 05:31:16 BoogieIcfgContainer [2022-04-06 17:31:16,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 17:31:16,113 INFO L158 Benchmark]: Toolchain (without parser) took 89972.91ms. Allocated memory was 182.5MB in the beginning and 267.4MB in the end (delta: 84.9MB). Free memory was 136.5MB in the beginning and 177.7MB in the end (delta: -41.2MB). Peak memory consumption was 45.5MB. Max. memory is 8.0GB. [2022-04-06 17:31:16,113 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 182.5MB. Free memory is still 152.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 17:31:16,113 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.93ms. Allocated memory is still 182.5MB. Free memory was 136.4MB in the beginning and 161.4MB in the end (delta: -25.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-06 17:31:16,114 INFO L158 Benchmark]: Boogie Preprocessor took 33.70ms. Allocated memory is still 182.5MB. Free memory was 161.4MB in the beginning and 160.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 17:31:16,114 INFO L158 Benchmark]: RCFGBuilder took 252.44ms. Allocated memory is still 182.5MB. Free memory was 160.0MB in the beginning and 149.2MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 17:31:16,114 INFO L158 Benchmark]: TraceAbstraction took 89489.06ms. Allocated memory was 182.5MB in the beginning and 267.4MB in the end (delta: 84.9MB). Free memory was 148.9MB in the beginning and 177.7MB in the end (delta: -28.8MB). Peak memory consumption was 57.0MB. Max. memory is 8.0GB. [2022-04-06 17:31:16,115 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 182.5MB. Free memory is still 152.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 192.93ms. Allocated memory is still 182.5MB. Free memory was 136.4MB in the beginning and 161.4MB in the end (delta: -25.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.70ms. Allocated memory is still 182.5MB. Free memory was 161.4MB in the beginning and 160.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 252.44ms. Allocated memory is still 182.5MB. Free memory was 160.0MB in the beginning and 149.2MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 89489.06ms. Allocated memory was 182.5MB in the beginning and 267.4MB in the end (delta: 84.9MB). Free memory was 148.9MB in the beginning and 177.7MB in the end (delta: -28.8MB). Peak memory consumption was 57.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 89.4s, OverallIterations: 11, TraceHistogramMax: 13, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 224 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 178 mSDsluCounter, 1170 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 791 mSDsCounter, 163 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1201 IncrementalHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 163 mSolverCounterUnsat, 379 mSDtfsCounter, 1201 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 852 GetRequests, 755 SyntacticMatches, 10 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 20.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=8, InterpolantAutomatonStates: 70, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 23 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 35 LocationsWithAnnotation, 389 PreInvPairs, 507 NumberOfFragments, 598 HoareAnnotationTreeSize, 389 FomulaSimplifications, 240 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 35 FomulaSimplificationsInter, 645 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((0 <= A && A == r) && A <= 1) && q == 0) && B == 1) && B == d) && p == 1) || ((((((0 <= A && A == r) && B * 2 == d) && p == 2) && A <= 1) && q == 0) && B == 1) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: 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 17:31:16,129 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...