/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 12:06:33,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 12:06:33,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 12:06:33,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 12:06:33,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-19 12:06:33,109 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-19 12:06:33,109 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-19 12:06:33,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-19 12:06:33,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-19 12:06:33,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-19 12:06:33,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-19 12:06:33,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-19 12:06:33,120 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-19 12:06:33,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-19 12:06:33,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-19 12:06:33,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-19 12:06:33,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-19 12:06:33,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-19 12:06:33,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 12:06:33,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 12:06:33,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 12:06:33,138 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 12:06:33,149 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 12:06:33,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 12:06:33,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 12:06:33,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 12:06:33,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 12:06:33,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 12:06:33,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 12:06:33,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 12:06:33,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 12:06:33,152 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 12:06:33,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 12:06:33,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 12:06:33,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 12:06:33,152 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 12:06:33,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 12:06:33,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 12:06:33,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 12:06:33,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 12:06:33,153 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 12:06:33,153 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 12:06:33,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 12:06:33,153 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 12:06:33,153 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 12:06:33,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 12:06:33,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 12:06:33,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 12:06:33,362 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 12:06:33,362 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 12:06:33,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound50.c [2022-03-19 12:06:33,409 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf69720d2/a681cf378b8543ce83649220e7b0628c/FLAGb84be4c68 [2022-03-19 12:06:33,773 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 12:06:33,773 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound50.c [2022-03-19 12:06:33,779 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf69720d2/a681cf378b8543ce83649220e7b0628c/FLAGb84be4c68 [2022-03-19 12:06:34,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf69720d2/a681cf378b8543ce83649220e7b0628c [2022-03-19 12:06:34,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 12:06:34,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 12:06:34,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 12:06:34,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 12:06:34,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 12:06:34,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 12:06:34" (1/1) ... [2022-03-19 12:06:34,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23281ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:06:34, skipping insertion in model container [2022-03-19 12:06:34,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 12:06:34" (1/1) ... [2022-03-19 12:06:34,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 12:06:34,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 12:06:34,399 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/prodbin-ll_valuebound50.c[537,550] [2022-03-19 12:06:34,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 12:06:34,421 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 12:06:34,431 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/prodbin-ll_valuebound50.c[537,550] [2022-03-19 12:06:34,437 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 12:06:34,445 INFO L208 MainTranslator]: Completed translation [2022-03-19 12:06:34,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:06:34 WrapperNode [2022-03-19 12:06:34,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 12:06:34,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 12:06:34,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 12:06:34,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 12:06:34,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:06:34" (1/1) ... [2022-03-19 12:06:34,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:06:34" (1/1) ... [2022-03-19 12:06:34,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:06:34" (1/1) ... [2022-03-19 12:06:34,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:06:34" (1/1) ... [2022-03-19 12:06:34,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:06:34" (1/1) ... [2022-03-19 12:06:34,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:06:34" (1/1) ... [2022-03-19 12:06:34,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:06:34" (1/1) ... [2022-03-19 12:06:34,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 12:06:34,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 12:06:34,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 12:06:34,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 12:06:34,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:06:34" (1/1) ... [2022-03-19 12:06:34,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 12:06:34,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:06:34,485 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-19 12:06:34,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-19 12:06:34,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 12:06:34,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 12:06:34,513 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 12:06:34,513 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 12:06:34,513 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 12:06:34,513 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 12:06:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 12:06:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 12:06:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 12:06:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 12:06:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 12:06:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 12:06:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 12:06:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 12:06:34,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 12:06:34,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 12:06:34,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 12:06:34,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 12:06:34,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 12:06:34,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 12:06:34,553 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 12:06:34,554 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 12:06:34,646 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 12:06:34,650 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 12:06:34,650 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-19 12:06:34,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:06:34 BoogieIcfgContainer [2022-03-19 12:06:34,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 12:06:34,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 12:06:34,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 12:06:34,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 12:06:34,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 12:06:34" (1/3) ... [2022-03-19 12:06:34,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9890d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 12:06:34, skipping insertion in model container [2022-03-19 12:06:34,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 12:06:34" (2/3) ... [2022-03-19 12:06:34,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9890d92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 12:06:34, skipping insertion in model container [2022-03-19 12:06:34,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 12:06:34" (3/3) ... [2022-03-19 12:06:34,657 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound50.c [2022-03-19 12:06:34,660 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 12:06:34,660 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 12:06:34,686 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 12:06:34,690 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-19 12:06:34,690 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 12:06:34,701 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 12:06:34,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 12:06:34,706 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:06:34,707 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:06:34,707 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:06:34,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:06:34,710 INFO L85 PathProgramCache]: Analyzing trace with hash -589322634, now seen corresponding path program 1 times [2022-03-19 12:06:34,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:06:34,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1213876542] [2022-03-19 12:06:34,723 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:06:34,723 INFO L85 PathProgramCache]: Analyzing trace with hash -589322634, now seen corresponding path program 2 times [2022-03-19 12:06:34,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:06:34,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670837542] [2022-03-19 12:06:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:06:34,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:06:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 12:06:34,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 12:06:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 12:06:34,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 12:06:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 12:06:34,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 12:06:34,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 12:06:34,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 12:06:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 12:06:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:06:34,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:06:34,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670837542] [2022-03-19 12:06:34,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670837542] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:06:34,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:06:34,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 12:06:34,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:06:34,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1213876542] [2022-03-19 12:06:34,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1213876542] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:06:34,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:06:34,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 12:06:34,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957080962] [2022-03-19 12:06:34,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:06:34,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 12:06:34,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:06:34,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 12:06:34,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 12:06:34,965 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 12:06:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:06:35,037 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-03-19 12:06:35,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 12:06:35,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-19 12:06:35,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:06:35,046 INFO L225 Difference]: With dead ends: 57 [2022-03-19 12:06:35,046 INFO L226 Difference]: Without dead ends: 27 [2022-03-19 12:06:35,050 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 12:06:35,053 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 12:06:35,054 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 12:06:35,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-19 12:06:35,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-19 12:06:35,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-19 12:06:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-19 12:06:35,088 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-03-19 12:06:35,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:06:35,089 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-19 12:06:35,089 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 12:06:35,090 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-19 12:06:35,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 12:06:35,092 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:06:35,092 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:06:35,092 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 12:06:35,093 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:06:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:06:35,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1736242504, now seen corresponding path program 1 times [2022-03-19 12:06:35,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:06:35,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1110297383] [2022-03-19 12:06:35,098 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:06:35,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1736242504, now seen corresponding path program 2 times [2022-03-19 12:06:35,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:06:35,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910045707] [2022-03-19 12:06:35,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:06:35,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:06:35,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:06:35,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371439220] [2022-03-19 12:06:35,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:06:35,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:06:35,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:06:35,142 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:06:35,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 12:06:35,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 12:06:35,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:06:35,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 12:06:35,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:06:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:06:35,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 12:06:35,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:06:35,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910045707] [2022-03-19 12:06:35,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:06:35,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371439220] [2022-03-19 12:06:35,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371439220] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:06:35,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:06:35,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 12:06:35,353 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:06:35,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1110297383] [2022-03-19 12:06:35,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1110297383] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:06:35,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:06:35,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 12:06:35,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908031955] [2022-03-19 12:06:35,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:06:35,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 12:06:35,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:06:35,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 12:06:35,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 12:06:35,355 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 12:06:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:06:35,395 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2022-03-19 12:06:35,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 12:06:35,395 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-19 12:06:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:06:35,396 INFO L225 Difference]: With dead ends: 39 [2022-03-19 12:06:35,396 INFO L226 Difference]: Without dead ends: 37 [2022-03-19 12:06:35,396 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 12:06:35,397 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 8 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 12:06:35,397 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 94 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 12:06:35,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-19 12:06:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-03-19 12:06:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 12:06:35,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-03-19 12:06:35,403 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2022-03-19 12:06:35,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:06:35,404 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-03-19 12:06:35,404 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 12:06:35,404 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-03-19 12:06:35,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 12:06:35,405 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:06:35,405 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:06:35,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 12:06:35,621 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:06:35,621 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:06:35,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:06:35,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1911690432, now seen corresponding path program 1 times [2022-03-19 12:06:35,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:06:35,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [95526998] [2022-03-19 12:06:35,622 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:06:35,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1911690432, now seen corresponding path program 2 times [2022-03-19 12:06:35,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:06:35,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318824036] [2022-03-19 12:06:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:06:35,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:06:35,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:06:35,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1024278984] [2022-03-19 12:06:35,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:06:35,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:06:35,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:06:35,666 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:06:35,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 12:06:35,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:06:35,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:06:35,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 12:06:35,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:06:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 12:06:35,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 12:06:35,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:06:35,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318824036] [2022-03-19 12:06:35,803 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:06:35,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024278984] [2022-03-19 12:06:35,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024278984] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:06:35,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:06:35,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 12:06:35,803 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:06:35,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [95526998] [2022-03-19 12:06:35,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [95526998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:06:35,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:06:35,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 12:06:35,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541249454] [2022-03-19 12:06:35,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:06:35,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 12:06:35,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:06:35,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 12:06:35,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 12:06:35,804 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 12:06:35,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:06:35,862 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-03-19 12:06:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 12:06:35,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-19 12:06:35,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:06:35,865 INFO L225 Difference]: With dead ends: 43 [2022-03-19 12:06:35,865 INFO L226 Difference]: Without dead ends: 36 [2022-03-19 12:06:35,865 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 12:06:35,866 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 12:06:35,866 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 99 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 12:06:35,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-19 12:06:35,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-03-19 12:06:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-19 12:06:35,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-03-19 12:06:35,871 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2022-03-19 12:06:35,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:06:35,871 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-03-19 12:06:35,871 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 12:06:35,872 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-03-19 12:06:35,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 12:06:35,872 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:06:35,872 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:06:35,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 12:06:36,100 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-19 12:06:36,100 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:06:36,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:06:36,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2022075506, now seen corresponding path program 1 times [2022-03-19 12:06:36,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:06:36,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2040783031] [2022-03-19 12:06:36,101 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:06:36,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2022075506, now seen corresponding path program 2 times [2022-03-19 12:06:36,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:06:36,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351173084] [2022-03-19 12:06:36,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:06:36,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:06:36,111 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:06:36,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1382215648] [2022-03-19 12:06:36,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:06:36,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:06:36,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:06:36,113 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:06:36,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 12:06:36,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:06:36,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:06:36,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 12:06:36,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:06:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:06:36,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:06:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 12:06:43,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:06:43,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351173084] [2022-03-19 12:06:43,906 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:06:43,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382215648] [2022-03-19 12:06:43,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382215648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:06:43,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:06:43,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-19 12:06:43,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:06:43,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2040783031] [2022-03-19 12:06:43,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2040783031] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:06:43,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:06:43,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 12:06:43,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244682162] [2022-03-19 12:06:43,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:06:43,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 12:06:43,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:06:43,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 12:06:43,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-03-19 12:06:43,908 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 12:06:45,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:06:46,412 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:06:46,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:06:46,583 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-03-19 12:06:46,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 12:06:46,584 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-03-19 12:06:46,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:06:46,586 INFO L225 Difference]: With dead ends: 49 [2022-03-19 12:06:46,586 INFO L226 Difference]: Without dead ends: 47 [2022-03-19 12:06:46,587 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-03-19 12:06:46,587 INFO L912 BasicCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-19 12:06:46,588 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 190 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-19 12:06:46,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-19 12:06:46,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2022-03-19 12:06:46,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 12:06:46,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-03-19 12:06:46,594 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 37 [2022-03-19 12:06:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:06:46,594 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-03-19 12:06:46,595 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 12:06:46,595 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-03-19 12:06:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-19 12:06:46,595 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:06:46,595 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:06:46,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 12:06:46,814 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:06:46,814 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:06:46,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:06:46,815 INFO L85 PathProgramCache]: Analyzing trace with hash -497884428, now seen corresponding path program 1 times [2022-03-19 12:06:46,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:06:46,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [491019669] [2022-03-19 12:06:46,815 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:06:46,815 INFO L85 PathProgramCache]: Analyzing trace with hash -497884428, now seen corresponding path program 2 times [2022-03-19 12:06:46,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:06:46,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608402759] [2022-03-19 12:06:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:06:46,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:06:46,829 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:06:46,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390336925] [2022-03-19 12:06:46,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:06:46,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:06:46,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:06:46,831 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:06:46,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 12:06:46,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:06:46,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:06:46,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 12:06:46,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:06:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 12:06:48,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:06:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-19 12:06:48,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:06:48,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608402759] [2022-03-19 12:06:48,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:06:48,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390336925] [2022-03-19 12:06:48,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390336925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:06:48,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:06:48,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-03-19 12:06:48,652 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:06:48,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [491019669] [2022-03-19 12:06:48,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [491019669] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:06:48,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:06:48,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 12:06:48,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111729885] [2022-03-19 12:06:48,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:06:48,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 12:06:48,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:06:48,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 12:06:48,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-19 12:06:48,653 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 12:06:48,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:06:48,747 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2022-03-19 12:06:48,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 12:06:48,748 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-03-19 12:06:48,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:06:48,750 INFO L225 Difference]: With dead ends: 59 [2022-03-19 12:06:48,750 INFO L226 Difference]: Without dead ends: 52 [2022-03-19 12:06:48,750 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-03-19 12:06:48,751 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 12:06:48,751 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 154 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 12:06:48,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-19 12:06:48,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-03-19 12:06:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-19 12:06:48,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-03-19 12:06:48,762 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 37 [2022-03-19 12:06:48,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:06:48,763 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-03-19 12:06:48,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 12:06:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-03-19 12:06:48,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-19 12:06:48,766 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:06:48,766 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:06:48,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 12:06:48,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:06:48,979 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:06:48,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:06:48,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1351630086, now seen corresponding path program 1 times [2022-03-19 12:06:48,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:06:48,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2101098564] [2022-03-19 12:06:48,980 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:06:48,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1351630086, now seen corresponding path program 2 times [2022-03-19 12:06:48,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:06:48,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738023214] [2022-03-19 12:06:48,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:06:48,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:06:48,988 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:06:48,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113843414] [2022-03-19 12:06:48,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:06:48,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:06:48,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:06:48,990 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:06:49,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 12:06:49,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:06:49,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:06:49,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-19 12:06:49,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:06:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 12:06:49,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:06:49,223 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 12:06:49,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:06:49,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738023214] [2022-03-19 12:06:49,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:06:49,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113843414] [2022-03-19 12:06:49,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113843414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:06:49,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:06:49,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-19 12:06:49,224 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:06:49,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2101098564] [2022-03-19 12:06:49,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2101098564] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:06:49,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:06:49,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 12:06:49,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366403918] [2022-03-19 12:06:49,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:06:49,225 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 12:06:49,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:06:49,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 12:06:49,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-19 12:06:49,225 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 12:06:51,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:06:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:06:51,290 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2022-03-19 12:06:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 12:06:51,291 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 43 [2022-03-19 12:06:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:06:51,291 INFO L225 Difference]: With dead ends: 57 [2022-03-19 12:06:51,291 INFO L226 Difference]: Without dead ends: 50 [2022-03-19 12:06:51,292 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-03-19 12:06:51,292 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-19 12:06:51,292 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 131 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-03-19 12:06:51,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-19 12:06:51,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-03-19 12:06:51,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-19 12:06:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-03-19 12:06:51,298 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 43 [2022-03-19 12:06:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:06:51,298 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-03-19 12:06:51,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-19 12:06:51,298 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-03-19 12:06:51,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 12:06:51,299 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:06:51,299 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 12:06:51,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 12:06:51,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:06:51,500 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:06:51,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:06:51,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1025268728, now seen corresponding path program 3 times [2022-03-19 12:06:51,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:06:51,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1435317326] [2022-03-19 12:06:51,501 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:06:51,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1025268728, now seen corresponding path program 4 times [2022-03-19 12:06:51,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:06:51,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828298984] [2022-03-19 12:06:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:06:51,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:06:51,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:06:51,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770745060] [2022-03-19 12:06:51,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 12:06:51,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:06:51,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:06:51,509 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:06:51,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 12:06:51,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 12:06:51,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:06:51,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-19 12:06:51,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:07:06,980 WARN L232 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 20 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-19 12:07:26,989 WARN L855 $PredicateComparison]: unable to prove that (exists ((aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63 Int) (v_main_~a~0_BEFORE_CALL_13 Int) (aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159 Int) (aux_div_aux_div_v_main_~b~0_BEFORE_CALL_13_44_45 Int) (aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_13_44_45 Int) (aux_div_v_main_~x~0_BEFORE_CALL_11_34 Int) (aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63 Int)) (let ((.cse7 (* 2 aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159)) (.cse6 (* aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63 2))) (let ((.cse0 (+ .cse6 aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63)) (.cse1 (+ .cse6 aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63 .cse7)) (.cse2 (* 2 aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_13_44_45)) (.cse3 (* aux_div_aux_div_v_main_~b~0_BEFORE_CALL_13_44_45 4)) (.cse4 (div (* aux_div_v_main_~x~0_BEFORE_CALL_11_34 2) 2))) (and (< aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63 2) (< aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_13_44_45 2) (< .cse0 3) (<= 1 aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_13_44_45) (<= 0 .cse1) (<= (+ .cse2 .cse3 1) .cse1) (<= 1 .cse0) (= (+ (* (* v_main_~a~0_BEFORE_CALL_13 aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63) 4) (* 2 (* v_main_~a~0_BEFORE_CALL_13 aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63)) (* (* v_main_~a~0_BEFORE_CALL_13 aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159) 4)) (+ .cse4 (* 2 (* .cse4 aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159)))) (< .cse1 (+ .cse2 3 .cse3)) (<= 1 aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63) (or (<= 1 |c___VERIFIER_assert_#in~cond|) (not (let ((.cse5 (div (+ .cse6 (- 1) aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63 .cse7) 2))) (= (* .cse4 .cse5) (+ (* (* aux_div_v_main_~x~0_BEFORE_CALL_11_34 (div (+ (- 1) .cse5) 2)) 2) .cse4))))))))) is different from true [2022-03-19 12:07:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 12:07:30,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:07:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 12:07:45,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:07:45,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828298984] [2022-03-19 12:07:45,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:07:45,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770745060] [2022-03-19 12:07:45,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770745060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:07:45,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:07:45,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 19 [2022-03-19 12:07:45,249 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:07:45,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1435317326] [2022-03-19 12:07:45,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1435317326] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:07:45,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:07:45,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 12:07:45,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581198581] [2022-03-19 12:07:45,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:07:45,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 12:07:45,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:07:45,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 12:07:45,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=246, Unknown=2, NotChecked=32, Total=342 [2022-03-19 12:07:45,251 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 12:07:47,510 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:07:49,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:07:53,307 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63 Int) (v_main_~a~0_BEFORE_CALL_13 Int) (aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159 Int) (aux_div_aux_div_v_main_~b~0_BEFORE_CALL_13_44_45 Int) (aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_13_44_45 Int) (aux_div_v_main_~x~0_BEFORE_CALL_11_34 Int) (aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63 Int)) (let ((.cse7 (* 2 aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159)) (.cse6 (* aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63 2))) (let ((.cse0 (+ .cse6 aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63)) (.cse1 (+ .cse6 aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63 .cse7)) (.cse2 (* 2 aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_13_44_45)) (.cse3 (* aux_div_aux_div_v_main_~b~0_BEFORE_CALL_13_44_45 4)) (.cse4 (div (* aux_div_v_main_~x~0_BEFORE_CALL_11_34 2) 2))) (and (< aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63 2) (< aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_13_44_45 2) (< .cse0 3) (<= 1 aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_13_44_45) (<= 0 .cse1) (<= (+ .cse2 .cse3 1) .cse1) (<= 1 .cse0) (= (+ (* (* v_main_~a~0_BEFORE_CALL_13 aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63) 4) (* 2 (* v_main_~a~0_BEFORE_CALL_13 aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63)) (* (* v_main_~a~0_BEFORE_CALL_13 aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159) 4)) (+ .cse4 (* 2 (* .cse4 aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159)))) (< .cse1 (+ .cse2 3 .cse3)) (<= 1 aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63) (or (<= 1 |c___VERIFIER_assert_#in~cond|) (not (let ((.cse5 (div (+ .cse6 (- 1) aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_13_44_159_63 .cse7) 2))) (= (* .cse4 .cse5) (+ (* (* aux_div_v_main_~x~0_BEFORE_CALL_11_34 (div (+ (- 1) .cse5) 2)) 2) .cse4))))))))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2022-03-19 12:07:54,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:07:54,172 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-03-19 12:07:54,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 12:07:54,173 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2022-03-19 12:07:54,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:07:54,173 INFO L225 Difference]: With dead ends: 61 [2022-03-19 12:07:54,173 INFO L226 Difference]: Without dead ends: 59 [2022-03-19 12:07:54,174 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=77, Invalid=308, Unknown=3, NotChecked=74, Total=462 [2022-03-19 12:07:54,174 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 17 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-19 12:07:54,174 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 228 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 221 Invalid, 0 Unknown, 60 Unchecked, 4.7s Time] [2022-03-19 12:07:54,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-19 12:07:54,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2022-03-19 12:07:54,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 38 states have internal predecessors, (40), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 12:07:54,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-03-19 12:07:54,193 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 46 [2022-03-19 12:07:54,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:07:54,196 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-03-19 12:07:54,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 12:07:54,196 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-03-19 12:07:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 12:07:54,197 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:07:54,197 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 12:07:54,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 12:07:54,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:07:54,403 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:07:54,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:07:54,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1494691206, now seen corresponding path program 1 times [2022-03-19 12:07:54,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:07:54,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2080934067] [2022-03-19 12:07:54,404 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:07:54,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1494691206, now seen corresponding path program 2 times [2022-03-19 12:07:54,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:07:54,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094006312] [2022-03-19 12:07:54,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:07:54,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:07:54,420 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:07:54,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096632304] [2022-03-19 12:07:54,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 12:07:54,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:07:54,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:07:54,422 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:07:54,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 12:07:54,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 12:07:54,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:07:54,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-19 12:07:54,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:07:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 12:07:59,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 12:08:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-03-19 12:08:03,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 12:08:03,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094006312] [2022-03-19 12:08:03,737 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 12:08:03,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096632304] [2022-03-19 12:08:03,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096632304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 12:08:03,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 12:08:03,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2022-03-19 12:08:03,737 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 12:08:03,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2080934067] [2022-03-19 12:08:03,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2080934067] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 12:08:03,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 12:08:03,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 12:08:03,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674559167] [2022-03-19 12:08:03,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 12:08:03,738 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 12:08:03,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 12:08:03,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 12:08:03,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=281, Unknown=2, NotChecked=0, Total=342 [2022-03-19 12:08:03,738 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 12:08:06,520 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-19 12:08:08,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 12:08:08,062 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2022-03-19 12:08:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 12:08:08,063 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2022-03-19 12:08:08,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 12:08:08,064 INFO L225 Difference]: With dead ends: 65 [2022-03-19 12:08:08,064 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 12:08:08,064 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=72, Invalid=346, Unknown=2, NotChecked=0, Total=420 [2022-03-19 12:08:08,065 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-19 12:08:08,065 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 257 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 238 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-03-19 12:08:08,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 12:08:08,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2022-03-19 12:08:08,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 38 states have internal predecessors, (40), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-19 12:08:08,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2022-03-19 12:08:08,073 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 46 [2022-03-19 12:08:08,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 12:08:08,074 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2022-03-19 12:08:08,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-03-19 12:08:08,074 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2022-03-19 12:08:08,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 12:08:08,074 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 12:08:08,074 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-19 12:08:08,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-19 12:08:08,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:08:08,287 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 12:08:08,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 12:08:08,287 INFO L85 PathProgramCache]: Analyzing trace with hash 4200374, now seen corresponding path program 3 times [2022-03-19 12:08:08,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 12:08:08,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [675468238] [2022-03-19 12:08:08,288 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 12:08:08,288 INFO L85 PathProgramCache]: Analyzing trace with hash 4200374, now seen corresponding path program 4 times [2022-03-19 12:08:08,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 12:08:08,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526789258] [2022-03-19 12:08:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 12:08:08,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 12:08:08,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 12:08:08,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721900958] [2022-03-19 12:08:08,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 12:08:08,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 12:08:08,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 12:08:08,311 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 12:08:08,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 12:08:08,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 12:08:08,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 12:08:08,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-19 12:08:08,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 12:10:27,850 WARN L232 SmtUtils]: Spent 5.87s on a formula simplification. DAG size of input: 14 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-03-19 12:11:47,643 WARN L833 $PredicateComparison]: unable to prove that (exists ((aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93_115_68 Int) (aux_div_v_main_~b~0_BEFORE_CALL_22_34 Int) (aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93_115_68 Int) (aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93 Int) (v_main_~z~0_BEFORE_CALL_18 Int) (v_main_~a~0_BEFORE_CALL_20 Int) (aux_div_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93_115_68 Int) (aux_mod_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93_115_68 Int)) (let ((.cse5 (* 2 aux_div_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93_115_68))) (let ((.cse4 (+ aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93_115_68 .cse5))) (let ((.cse0 (* aux_div_v_main_~b~0_BEFORE_CALL_22_34 2)) (.cse2 (* 2 aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93)) (.cse1 (+ (* aux_div_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93_115_68 4) aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93_115_68 .cse5 (* aux_mod_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93_115_68 2))) (.cse3 (+ (* (* aux_mod_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93_115_68 v_main_~a~0_BEFORE_CALL_20) 2) (* v_main_~a~0_BEFORE_CALL_20 .cse4) (* (* v_main_~a~0_BEFORE_CALL_20 aux_div_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93_115_68) 4)))) (and (not (= aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93_115_68 1)) (<= .cse0 .cse1) (< .cse1 (+ 2 .cse2)) (< aux_mod_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93_115_68 2) (<= 0 aux_div_v_main_~b~0_BEFORE_CALL_22_34) (< aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93_115_68 2) (< .cse1 (+ 2 .cse0)) (<= 1 aux_mod_aux_div_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93_115_68) (<= .cse2 .cse1) (or (and (<= 0 |c___VERIFIER_assert_#in~cond|) (not (= .cse3 (+ v_main_~z~0_BEFORE_CALL_18 (* 2 (* (div (+ (- 1) (div .cse1 2)) 2) v_main_~z~0_BEFORE_CALL_18)))))) (<= 1 |c___VERIFIER_assert_#in~cond|)) (< .cse4 2) (<= 0 .cse4) (<= 0 aux_mod_aux_mod_aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93_115_68) (= .cse3 (* v_main_~z~0_BEFORE_CALL_18 aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_22_34_93))))))) is different from false [2022-03-19 12:18:18,855 WARN L232 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)