/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-e106359-m [2022-04-15 08:08:07,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-15 08:08:07,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-15 08:08:07,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-15 08:08:07,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-15 08:08:07,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-15 08:08:07,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-15 08:08:07,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-15 08:08:07,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-15 08:08:07,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-15 08:08:07,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-15 08:08:07,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-15 08:08:07,465 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-15 08:08:07,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-15 08:08:07,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-15 08:08:07,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-15 08:08:07,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-15 08:08:07,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-15 08:08:07,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-15 08:08:07,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-15 08:08:07,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-15 08:08:07,487 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-15 08:08:07,498 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-15 08:08:07,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-15 08:08:07,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-15 08:08:07,500 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-15 08:08:07,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-15 08:08:07,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-15 08:08:07,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-15 08:08:07,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-15 08:08:07,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-15 08:08:07,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-15 08:08:07,502 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-15 08:08:07,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-15 08:08:07,502 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-15 08:08:07,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-15 08:08:07,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-15 08:08:07,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-15 08:08:07,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-15 08:08:07,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-15 08:08:07,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 08:08:07,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-15 08:08:07,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-15 08:08:07,503 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-15 08:08:07,503 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-15 08:08:07,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-15 08:08:07,504 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-15 08:08:07,504 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-15 08:08:07,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-15 08:08:07,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-15 08:08:07,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-15 08:08:07,786 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-15 08:08:07,787 INFO L275 PluginConnector]: CDTParser initialized [2022-04-15 08:08:07,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound20.i [2022-04-15 08:08:07,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cd22ad55/118663651d5e44ed9a1fd64af8653be7/FLAGd543cf5b6 [2022-04-15 08:08:08,202 INFO L306 CDTParser]: Found 1 translation units. [2022-04-15 08:08:08,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin2_unwindbound20.i [2022-04-15 08:08:08,208 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cd22ad55/118663651d5e44ed9a1fd64af8653be7/FLAGd543cf5b6 [2022-04-15 08:08:08,623 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cd22ad55/118663651d5e44ed9a1fd64af8653be7 [2022-04-15 08:08:08,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-15 08:08:08,627 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-15 08:08:08,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-15 08:08:08,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-15 08:08:08,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-15 08:08:08,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 08:08:08" (1/1) ... [2022-04-15 08:08:08,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bedf22e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 08:08:08, skipping insertion in model container [2022-04-15 08:08:08,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 08:08:08" (1/1) ... [2022-04-15 08:08:08,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-15 08:08:08,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-15 08:08:08,813 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/divbin2_unwindbound20.i[951,964] [2022-04-15 08:08:08,829 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 08:08:08,846 INFO L203 MainTranslator]: Completed pre-run [2022-04-15 08:08:08,855 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/divbin2_unwindbound20.i[951,964] [2022-04-15 08:08:08,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 08:08:08,876 INFO L208 MainTranslator]: Completed translation [2022-04-15 08:08:08,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 08:08:08 WrapperNode [2022-04-15 08:08:08,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-15 08:08:08,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-15 08:08:08,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-15 08:08:08,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-15 08:08:08,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 08:08:08" (1/1) ... [2022-04-15 08:08:08,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 08:08:08" (1/1) ... [2022-04-15 08:08:08,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 08:08:08" (1/1) ... [2022-04-15 08:08:08,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 08:08:08" (1/1) ... [2022-04-15 08:08:08,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 08:08:08" (1/1) ... [2022-04-15 08:08:08,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 08:08:08" (1/1) ... [2022-04-15 08:08:08,901 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 08:08:08" (1/1) ... [2022-04-15 08:08:08,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-15 08:08:08,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-15 08:08:08,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-15 08:08:08,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-15 08:08:08,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 08:08:08" (1/1) ... [2022-04-15 08:08:08,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 08:08:08,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 08:08:08,936 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-15 08:08:08,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-15 08:08:08,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-15 08:08:08,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-15 08:08:08,966 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-15 08:08:08,966 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-15 08:08:08,966 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-15 08:08:08,966 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-15 08:08:08,966 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-15 08:08:08,966 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-15 08:08:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-15 08:08:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-15 08:08:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-15 08:08:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-15 08:08:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-15 08:08:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-15 08:08:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-15 08:08:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-15 08:08:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-15 08:08:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-15 08:08:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-15 08:08:08,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-15 08:08:08,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-15 08:08:08,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-15 08:08:09,025 INFO L234 CfgBuilder]: Building ICFG [2022-04-15 08:08:09,026 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-15 08:08:09,157 INFO L275 CfgBuilder]: Performing block encoding [2022-04-15 08:08:09,163 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-15 08:08:09,164 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-15 08:08:09,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 08:08:09 BoogieIcfgContainer [2022-04-15 08:08:09,165 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-15 08:08:09,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-15 08:08:09,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-15 08:08:09,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-15 08:08:09,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 08:08:08" (1/3) ... [2022-04-15 08:08:09,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a19c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 08:08:09, skipping insertion in model container [2022-04-15 08:08:09,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 08:08:08" (2/3) ... [2022-04-15 08:08:09,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a19c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 08:08:09, skipping insertion in model container [2022-04-15 08:08:09,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 08:08:09" (3/3) ... [2022-04-15 08:08:09,185 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound20.i [2022-04-15 08:08:09,190 INFO L202 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-15 08:08:09,190 INFO L161 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-15 08:08:09,262 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-15 08:08:09,278 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-15 08:08:09,278 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-15 08:08:09,302 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 08:08:09,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-15 08:08:09,318 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 08:08:09,319 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 08:08:09,320 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 08:08:09,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 08:08:09,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2126508982, now seen corresponding path program 1 times [2022-04-15 08:08:09,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:09,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1899316206] [2022-04-15 08:08:09,352 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 08:08:09,353 INFO L85 PathProgramCache]: Analyzing trace with hash -2126508982, now seen corresponding path program 2 times [2022-04-15 08:08:09,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 08:08:09,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398257848] [2022-04-15 08:08:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 08:08:09,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 08:08:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 08:08:09,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-15 08:08:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 08:08:09,580 INFO L290 TraceCheckUtils]: 0: Hoare triple {34#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {29#true} is VALID [2022-04-15 08:08:09,580 INFO L290 TraceCheckUtils]: 1: Hoare triple {29#true} assume true; {29#true} is VALID [2022-04-15 08:08:09,581 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {29#true} {29#true} #82#return; {29#true} is VALID [2022-04-15 08:08:09,586 INFO L272 TraceCheckUtils]: 0: Hoare triple {29#true} call ULTIMATE.init(); {34#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-15 08:08:09,586 INFO L290 TraceCheckUtils]: 1: Hoare triple {34#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {29#true} is VALID [2022-04-15 08:08:09,586 INFO L290 TraceCheckUtils]: 2: Hoare triple {29#true} assume true; {29#true} is VALID [2022-04-15 08:08:09,587 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {29#true} {29#true} #82#return; {29#true} is VALID [2022-04-15 08:08:09,587 INFO L272 TraceCheckUtils]: 4: Hoare triple {29#true} call #t~ret4 := main(); {29#true} is VALID [2022-04-15 08:08:09,587 INFO L290 TraceCheckUtils]: 5: Hoare triple {29#true} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {29#true} is VALID [2022-04-15 08:08:09,589 INFO L290 TraceCheckUtils]: 6: Hoare triple {29#true} assume !true; {30#false} is VALID [2022-04-15 08:08:09,589 INFO L290 TraceCheckUtils]: 7: Hoare triple {30#false} assume !true; {30#false} is VALID [2022-04-15 08:08:09,590 INFO L272 TraceCheckUtils]: 8: Hoare triple {30#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {30#false} is VALID [2022-04-15 08:08:09,590 INFO L290 TraceCheckUtils]: 9: Hoare triple {30#false} ~cond := #in~cond; {30#false} is VALID [2022-04-15 08:08:09,590 INFO L290 TraceCheckUtils]: 10: Hoare triple {30#false} assume 0 == ~cond; {30#false} is VALID [2022-04-15 08:08:09,591 INFO L290 TraceCheckUtils]: 11: Hoare triple {30#false} assume !false; {30#false} is VALID [2022-04-15 08:08:09,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 08:08:09,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 08:08:09,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398257848] [2022-04-15 08:08:09,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398257848] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 08:08:09,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 08:08:09,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-15 08:08:09,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 08:08:09,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1899316206] [2022-04-15 08:08:09,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1899316206] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 08:08:09,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 08:08:09,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-15 08:08:09,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428648618] [2022-04-15 08:08:09,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 08:08:09,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-15 08:08:09,606 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 08:08:09,609 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:09,637 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:09,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-15 08:08:09,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:09,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-15 08:08:09,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-15 08:08:09,673 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:09,836 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-04-15 08:08:09,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-15 08:08:09,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-15 08:08:09,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 08:08:09,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2022-04-15 08:08:09,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2022-04-15 08:08:09,864 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 60 transitions. [2022-04-15 08:08:09,946 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 60 edges. 60 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:09,953 INFO L225 Difference]: With dead ends: 44 [2022-04-15 08:08:09,954 INFO L226 Difference]: Without dead ends: 22 [2022-04-15 08:08:09,957 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-15 08:08:09,960 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 08:08:09,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 08:08:09,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-15 08:08:10,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-04-15 08:08:10,020 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 08:08:10,021 INFO L82 GeneralOperation]: Start isEquivalent. First operand 22 states. Second operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:10,021 INFO L74 IsIncluded]: Start isIncluded. First operand 22 states. Second operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:10,022 INFO L87 Difference]: Start difference. First operand 22 states. Second operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:10,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:10,025 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2022-04-15 08:08:10,025 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-04-15 08:08:10,026 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:10,026 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:10,026 INFO L74 IsIncluded]: Start isIncluded. First operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 22 states. [2022-04-15 08:08:10,027 INFO L87 Difference]: Start difference. First operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 22 states. [2022-04-15 08:08:10,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:10,029 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2022-04-15 08:08:10,029 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-04-15 08:08:10,030 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:10,030 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:10,030 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 08:08:10,030 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 08:08:10,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:10,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-04-15 08:08:10,034 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2022-04-15 08:08:10,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 08:08:10,034 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-04-15 08:08:10,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:10,035 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 21 states and 26 transitions. [2022-04-15 08:08:10,068 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 26 edges. 26 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:10,069 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-04-15 08:08:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-15 08:08:10,070 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 08:08:10,070 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 08:08:10,071 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-15 08:08:10,071 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 08:08:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 08:08:10,072 INFO L85 PathProgramCache]: Analyzing trace with hash 941422680, now seen corresponding path program 1 times [2022-04-15 08:08:10,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:10,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [75314095] [2022-04-15 08:08:10,073 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 08:08:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash 941422680, now seen corresponding path program 2 times [2022-04-15 08:08:10,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 08:08:10,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202159835] [2022-04-15 08:08:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 08:08:10,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 08:08:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 08:08:10,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-15 08:08:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 08:08:10,210 INFO L290 TraceCheckUtils]: 0: Hoare triple {218#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {216#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:10,210 INFO L290 TraceCheckUtils]: 1: Hoare triple {216#(<= ~counter~0 0)} assume true; {216#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:10,211 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {216#(<= ~counter~0 0)} {211#true} #82#return; {216#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:10,212 INFO L272 TraceCheckUtils]: 0: Hoare triple {211#true} call ULTIMATE.init(); {218#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-15 08:08:10,212 INFO L290 TraceCheckUtils]: 1: Hoare triple {218#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {216#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:10,213 INFO L290 TraceCheckUtils]: 2: Hoare triple {216#(<= ~counter~0 0)} assume true; {216#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:10,214 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {216#(<= ~counter~0 0)} {211#true} #82#return; {216#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:10,214 INFO L272 TraceCheckUtils]: 4: Hoare triple {216#(<= ~counter~0 0)} call #t~ret4 := main(); {216#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:10,215 INFO L290 TraceCheckUtils]: 5: Hoare triple {216#(<= ~counter~0 0)} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {216#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:10,215 INFO L290 TraceCheckUtils]: 6: Hoare triple {216#(<= ~counter~0 0)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {217#(<= |main_#t~post2| 0)} is VALID [2022-04-15 08:08:10,216 INFO L290 TraceCheckUtils]: 7: Hoare triple {217#(<= |main_#t~post2| 0)} assume !(#t~post2 < 20);havoc #t~post2; {212#false} is VALID [2022-04-15 08:08:10,216 INFO L290 TraceCheckUtils]: 8: Hoare triple {212#false} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {212#false} is VALID [2022-04-15 08:08:10,216 INFO L290 TraceCheckUtils]: 9: Hoare triple {212#false} assume !(#t~post3 < 20);havoc #t~post3; {212#false} is VALID [2022-04-15 08:08:10,216 INFO L272 TraceCheckUtils]: 10: Hoare triple {212#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {212#false} is VALID [2022-04-15 08:08:10,217 INFO L290 TraceCheckUtils]: 11: Hoare triple {212#false} ~cond := #in~cond; {212#false} is VALID [2022-04-15 08:08:10,217 INFO L290 TraceCheckUtils]: 12: Hoare triple {212#false} assume 0 == ~cond; {212#false} is VALID [2022-04-15 08:08:10,217 INFO L290 TraceCheckUtils]: 13: Hoare triple {212#false} assume !false; {212#false} is VALID [2022-04-15 08:08:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 08:08:10,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 08:08:10,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202159835] [2022-04-15 08:08:10,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202159835] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 08:08:10,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 08:08:10,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-15 08:08:10,218 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 08:08:10,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [75314095] [2022-04-15 08:08:10,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [75314095] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 08:08:10,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 08:08:10,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-15 08:08:10,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396699048] [2022-04-15 08:08:10,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 08:08:10,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-15 08:08:10,220 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 08:08:10,221 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:10,235 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 14 edges. 14 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:10,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-15 08:08:10,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:10,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-15 08:08:10,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-15 08:08:10,237 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:10,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:10,375 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-04-15 08:08:10,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-15 08:08:10,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-15 08:08:10,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 08:08:10,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 44 transitions. [2022-04-15 08:08:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:10,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 44 transitions. [2022-04-15 08:08:10,379 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 44 transitions. [2022-04-15 08:08:10,417 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 44 edges. 44 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:10,418 INFO L225 Difference]: With dead ends: 35 [2022-04-15 08:08:10,418 INFO L226 Difference]: Without dead ends: 23 [2022-04-15 08:08:10,419 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-15 08:08:10,420 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 08:08:10,420 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 08:08:10,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-15 08:08:10,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-15 08:08:10,429 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 08:08:10,429 INFO L82 GeneralOperation]: Start isEquivalent. First operand 23 states. Second operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:10,429 INFO L74 IsIncluded]: Start isIncluded. First operand 23 states. Second operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:10,430 INFO L87 Difference]: Start difference. First operand 23 states. Second operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:10,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:10,431 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-04-15 08:08:10,431 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-04-15 08:08:10,432 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:10,432 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:10,432 INFO L74 IsIncluded]: Start isIncluded. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 23 states. [2022-04-15 08:08:10,433 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 23 states. [2022-04-15 08:08:10,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:10,434 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2022-04-15 08:08:10,434 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-04-15 08:08:10,435 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:10,435 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:10,435 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 08:08:10,435 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 08:08:10,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-04-15 08:08:10,437 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 14 [2022-04-15 08:08:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 08:08:10,437 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-04-15 08:08:10,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:10,437 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 23 states and 28 transitions. [2022-04-15 08:08:10,462 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-04-15 08:08:10,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-15 08:08:10,463 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 08:08:10,463 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 08:08:10,463 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-15 08:08:10,464 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 08:08:10,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 08:08:10,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1209133518, now seen corresponding path program 1 times [2022-04-15 08:08:10,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:10,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1874291861] [2022-04-15 08:08:10,465 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 08:08:10,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1209133518, now seen corresponding path program 2 times [2022-04-15 08:08:10,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 08:08:10,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049628642] [2022-04-15 08:08:10,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 08:08:10,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 08:08:10,480 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 08:08:10,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126793676] [2022-04-15 08:08:10,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 08:08:10,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 08:08:10,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 08:08:10,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 08:08:10,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-15 08:08:10,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 08:08:10,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 08:08:10,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-15 08:08:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 08:08:10,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 08:08:10,731 INFO L272 TraceCheckUtils]: 0: Hoare triple {385#true} call ULTIMATE.init(); {385#true} is VALID [2022-04-15 08:08:10,732 INFO L290 TraceCheckUtils]: 1: Hoare triple {385#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {393#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:10,732 INFO L290 TraceCheckUtils]: 2: Hoare triple {393#(<= ~counter~0 0)} assume true; {393#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:10,733 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {393#(<= ~counter~0 0)} {385#true} #82#return; {393#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:10,734 INFO L272 TraceCheckUtils]: 4: Hoare triple {393#(<= ~counter~0 0)} call #t~ret4 := main(); {393#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:10,734 INFO L290 TraceCheckUtils]: 5: Hoare triple {393#(<= ~counter~0 0)} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {393#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:10,735 INFO L290 TraceCheckUtils]: 6: Hoare triple {393#(<= ~counter~0 0)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {409#(<= ~counter~0 1)} is VALID [2022-04-15 08:08:10,735 INFO L290 TraceCheckUtils]: 7: Hoare triple {409#(<= ~counter~0 1)} assume !!(#t~post2 < 20);havoc #t~post2; {409#(<= ~counter~0 1)} is VALID [2022-04-15 08:08:10,736 INFO L290 TraceCheckUtils]: 8: Hoare triple {409#(<= ~counter~0 1)} assume !(~r~0 % 4294967296 >= ~b~0 % 4294967296); {409#(<= ~counter~0 1)} is VALID [2022-04-15 08:08:10,737 INFO L290 TraceCheckUtils]: 9: Hoare triple {409#(<= ~counter~0 1)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {419#(<= |main_#t~post3| 1)} is VALID [2022-04-15 08:08:10,737 INFO L290 TraceCheckUtils]: 10: Hoare triple {419#(<= |main_#t~post3| 1)} assume !(#t~post3 < 20);havoc #t~post3; {386#false} is VALID [2022-04-15 08:08:10,737 INFO L272 TraceCheckUtils]: 11: Hoare triple {386#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {386#false} is VALID [2022-04-15 08:08:10,737 INFO L290 TraceCheckUtils]: 12: Hoare triple {386#false} ~cond := #in~cond; {386#false} is VALID [2022-04-15 08:08:10,738 INFO L290 TraceCheckUtils]: 13: Hoare triple {386#false} assume 0 == ~cond; {386#false} is VALID [2022-04-15 08:08:10,738 INFO L290 TraceCheckUtils]: 14: Hoare triple {386#false} assume !false; {386#false} is VALID [2022-04-15 08:08:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 08:08:10,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 08:08:10,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 08:08:10,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049628642] [2022-04-15 08:08:10,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 08:08:10,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126793676] [2022-04-15 08:08:10,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126793676] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 08:08:10,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 08:08:10,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 08:08:10,747 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 08:08:10,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1874291861] [2022-04-15 08:08:10,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1874291861] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 08:08:10,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 08:08:10,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 08:08:10,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667095649] [2022-04-15 08:08:10,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 08:08:10,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-15 08:08:10,750 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 08:08:10,750 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:10,770 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 15 edges. 15 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:10,770 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-15 08:08:10,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:10,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-15 08:08:10,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-15 08:08:10,771 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:10,883 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-04-15 08:08:10,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-15 08:08:10,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-15 08:08:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 08:08:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:10,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2022-04-15 08:08:10,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 40 transitions. [2022-04-15 08:08:10,887 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 40 transitions. [2022-04-15 08:08:10,923 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 40 edges. 40 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:10,924 INFO L225 Difference]: With dead ends: 34 [2022-04-15 08:08:10,924 INFO L226 Difference]: Without dead ends: 27 [2022-04-15 08:08:10,925 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-15 08:08:10,926 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 08:08:10,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 81 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 08:08:10,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-15 08:08:10,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-04-15 08:08:10,938 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 08:08:10,939 INFO L82 GeneralOperation]: Start isEquivalent. First operand 27 states. Second operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:10,939 INFO L74 IsIncluded]: Start isIncluded. First operand 27 states. Second operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:10,939 INFO L87 Difference]: Start difference. First operand 27 states. Second operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:10,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:10,941 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-04-15 08:08:10,941 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-04-15 08:08:10,941 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:10,941 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:10,942 INFO L74 IsIncluded]: Start isIncluded. First operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 27 states. [2022-04-15 08:08:10,942 INFO L87 Difference]: Start difference. First operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 27 states. [2022-04-15 08:08:10,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:10,943 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-04-15 08:08:10,943 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-04-15 08:08:10,944 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:10,944 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:10,944 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 08:08:10,944 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 08:08:10,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:10,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-04-15 08:08:10,946 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 15 [2022-04-15 08:08:10,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 08:08:10,946 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-04-15 08:08:10,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:10,946 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 26 states and 32 transitions. [2022-04-15 08:08:10,988 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 32 edges. 32 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:10,988 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-04-15 08:08:10,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-15 08:08:10,988 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 08:08:10,989 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 08:08:11,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-15 08:08:11,189 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 08:08:11,190 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 08:08:11,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 08:08:11,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1207346058, now seen corresponding path program 1 times [2022-04-15 08:08:11,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:11,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1578550648] [2022-04-15 08:08:11,191 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 08:08:11,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1207346058, now seen corresponding path program 2 times [2022-04-15 08:08:11,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 08:08:11,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886649870] [2022-04-15 08:08:11,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 08:08:11,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 08:08:11,208 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 08:08:11,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750976819] [2022-04-15 08:08:11,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 08:08:11,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 08:08:11,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 08:08:11,210 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 08:08:11,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-15 08:08:11,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 08:08:11,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 08:08:11,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-15 08:08:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 08:08:11,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 08:08:11,582 INFO L272 TraceCheckUtils]: 0: Hoare triple {608#true} call ULTIMATE.init(); {608#true} is VALID [2022-04-15 08:08:11,582 INFO L290 TraceCheckUtils]: 1: Hoare triple {608#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {608#true} is VALID [2022-04-15 08:08:11,583 INFO L290 TraceCheckUtils]: 2: Hoare triple {608#true} assume true; {608#true} is VALID [2022-04-15 08:08:11,583 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {608#true} {608#true} #82#return; {608#true} is VALID [2022-04-15 08:08:11,583 INFO L272 TraceCheckUtils]: 4: Hoare triple {608#true} call #t~ret4 := main(); {608#true} is VALID [2022-04-15 08:08:11,584 INFO L290 TraceCheckUtils]: 5: Hoare triple {608#true} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {628#(and (= main_~b~0 1) (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-15 08:08:11,584 INFO L290 TraceCheckUtils]: 6: Hoare triple {628#(and (= main_~b~0 1) (= main_~A~0 main_~r~0) (= main_~q~0 0))} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {628#(and (= main_~b~0 1) (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-15 08:08:11,585 INFO L290 TraceCheckUtils]: 7: Hoare triple {628#(and (= main_~b~0 1) (= main_~A~0 main_~r~0) (= main_~q~0 0))} assume !!(#t~post2 < 20);havoc #t~post2; {628#(and (= main_~b~0 1) (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-15 08:08:11,586 INFO L290 TraceCheckUtils]: 8: Hoare triple {628#(and (= main_~b~0 1) (= main_~A~0 main_~r~0) (= main_~q~0 0))} assume !(~r~0 % 4294967296 >= ~b~0 % 4294967296); {638#(and (= main_~b~0 1) (not (<= (mod main_~b~0 4294967296) (mod main_~r~0 4294967296))) (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-15 08:08:11,586 INFO L290 TraceCheckUtils]: 9: Hoare triple {638#(and (= main_~b~0 1) (not (<= (mod main_~b~0 4294967296) (mod main_~r~0 4294967296))) (= main_~A~0 main_~r~0) (= main_~q~0 0))} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {638#(and (= main_~b~0 1) (not (<= (mod main_~b~0 4294967296) (mod main_~r~0 4294967296))) (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-15 08:08:11,587 INFO L290 TraceCheckUtils]: 10: Hoare triple {638#(and (= main_~b~0 1) (not (<= (mod main_~b~0 4294967296) (mod main_~r~0 4294967296))) (= main_~A~0 main_~r~0) (= main_~q~0 0))} assume !!(#t~post3 < 20);havoc #t~post3; {638#(and (= main_~b~0 1) (not (<= (mod main_~b~0 4294967296) (mod main_~r~0 4294967296))) (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-15 08:08:11,588 INFO L272 TraceCheckUtils]: 11: Hoare triple {638#(and (= main_~b~0 1) (not (<= (mod main_~b~0 4294967296) (mod main_~r~0 4294967296))) (= main_~A~0 main_~r~0) (= main_~q~0 0))} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {648#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 08:08:11,589 INFO L290 TraceCheckUtils]: 12: Hoare triple {648#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {652#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 08:08:11,595 INFO L290 TraceCheckUtils]: 13: Hoare triple {652#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {609#false} is VALID [2022-04-15 08:08:11,595 INFO L290 TraceCheckUtils]: 14: Hoare triple {609#false} assume !false; {609#false} is VALID [2022-04-15 08:08:11,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 08:08:11,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 08:08:11,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 08:08:11,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886649870] [2022-04-15 08:08:11,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 08:08:11,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750976819] [2022-04-15 08:08:11,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750976819] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 08:08:11,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 08:08:11,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-15 08:08:11,597 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 08:08:11,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1578550648] [2022-04-15 08:08:11,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1578550648] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 08:08:11,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 08:08:11,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-15 08:08:11,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744468112] [2022-04-15 08:08:11,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 08:08:11,598 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-15 08:08:11,598 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 08:08:11,599 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:11,613 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 15 edges. 15 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:11,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-15 08:08:11,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:11,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-15 08:08:11,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-04-15 08:08:11,615 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:11,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:11,844 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2022-04-15 08:08:11,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-15 08:08:11,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-04-15 08:08:11,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 08:08:11,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 42 transitions. [2022-04-15 08:08:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 42 transitions. [2022-04-15 08:08:11,847 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 42 transitions. [2022-04-15 08:08:11,887 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 42 edges. 42 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:11,889 INFO L225 Difference]: With dead ends: 35 [2022-04-15 08:08:11,889 INFO L226 Difference]: Without dead ends: 32 [2022-04-15 08:08:11,889 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-04-15 08:08:11,890 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-15 08:08:11,890 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 88 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-15 08:08:11,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-15 08:08:11,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-15 08:08:11,907 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 08:08:11,914 INFO L82 GeneralOperation]: Start isEquivalent. First operand 32 states. Second operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 08:08:11,919 INFO L74 IsIncluded]: Start isIncluded. First operand 32 states. Second operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 08:08:11,920 INFO L87 Difference]: Start difference. First operand 32 states. Second operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 08:08:11,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:11,921 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-04-15 08:08:11,921 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-04-15 08:08:11,924 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:11,924 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:11,925 INFO L74 IsIncluded]: Start isIncluded. First operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 32 states. [2022-04-15 08:08:11,925 INFO L87 Difference]: Start difference. First operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 32 states. [2022-04-15 08:08:11,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:11,927 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-04-15 08:08:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-04-15 08:08:11,929 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:11,929 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:11,929 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 08:08:11,929 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 08:08:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 08:08:11,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-04-15 08:08:11,932 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 15 [2022-04-15 08:08:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 08:08:11,933 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-04-15 08:08:11,933 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:11,933 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 32 states and 38 transitions. [2022-04-15 08:08:11,971 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 38 edges. 38 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:11,971 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-04-15 08:08:11,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-15 08:08:11,971 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 08:08:11,972 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 08:08:12,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-15 08:08:12,172 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,SelfDestructingSolverStorable3 [2022-04-15 08:08:12,173 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 08:08:12,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 08:08:12,173 INFO L85 PathProgramCache]: Analyzing trace with hash -352921097, now seen corresponding path program 1 times [2022-04-15 08:08:12,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:12,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [497622500] [2022-04-15 08:08:12,195 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-15 08:08:12,196 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-15 08:08:12,196 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-15 08:08:12,196 INFO L85 PathProgramCache]: Analyzing trace with hash -352921097, now seen corresponding path program 2 times [2022-04-15 08:08:12,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 08:08:12,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866628161] [2022-04-15 08:08:12,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 08:08:12,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 08:08:12,209 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 08:08:12,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652670875] [2022-04-15 08:08:12,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 08:08:12,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 08:08:12,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 08:08:12,212 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 08:08:12,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-15 08:08:12,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 08:08:12,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 08:08:12,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-15 08:08:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 08:08:12,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 08:08:12,381 INFO L272 TraceCheckUtils]: 0: Hoare triple {858#true} call ULTIMATE.init(); {858#true} is VALID [2022-04-15 08:08:12,381 INFO L290 TraceCheckUtils]: 1: Hoare triple {858#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {858#true} is VALID [2022-04-15 08:08:12,381 INFO L290 TraceCheckUtils]: 2: Hoare triple {858#true} assume true; {858#true} is VALID [2022-04-15 08:08:12,381 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {858#true} {858#true} #82#return; {858#true} is VALID [2022-04-15 08:08:12,382 INFO L272 TraceCheckUtils]: 4: Hoare triple {858#true} call #t~ret4 := main(); {858#true} is VALID [2022-04-15 08:08:12,382 INFO L290 TraceCheckUtils]: 5: Hoare triple {858#true} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-15 08:08:12,383 INFO L290 TraceCheckUtils]: 6: Hoare triple {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-15 08:08:12,383 INFO L290 TraceCheckUtils]: 7: Hoare triple {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} assume !!(#t~post2 < 20);havoc #t~post2; {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-15 08:08:12,384 INFO L290 TraceCheckUtils]: 8: Hoare triple {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} assume !!(~r~0 % 4294967296 >= ~b~0 % 4294967296);~b~0 := 2 * ~b~0; {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-15 08:08:12,384 INFO L290 TraceCheckUtils]: 9: Hoare triple {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-15 08:08:12,385 INFO L290 TraceCheckUtils]: 10: Hoare triple {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} assume !(#t~post2 < 20);havoc #t~post2; {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-15 08:08:12,386 INFO L290 TraceCheckUtils]: 11: Hoare triple {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-15 08:08:12,386 INFO L290 TraceCheckUtils]: 12: Hoare triple {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} assume !(#t~post3 < 20);havoc #t~post3; {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} is VALID [2022-04-15 08:08:12,387 INFO L272 TraceCheckUtils]: 13: Hoare triple {878#(and (= main_~A~0 main_~r~0) (= main_~q~0 0))} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {903#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 08:08:12,387 INFO L290 TraceCheckUtils]: 14: Hoare triple {903#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {907#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 08:08:12,388 INFO L290 TraceCheckUtils]: 15: Hoare triple {907#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {859#false} is VALID [2022-04-15 08:08:12,388 INFO L290 TraceCheckUtils]: 16: Hoare triple {859#false} assume !false; {859#false} is VALID [2022-04-15 08:08:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-15 08:08:12,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 08:08:12,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 08:08:12,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866628161] [2022-04-15 08:08:12,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 08:08:12,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652670875] [2022-04-15 08:08:12,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652670875] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 08:08:12,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 08:08:12,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 08:08:12,390 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 08:08:12,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [497622500] [2022-04-15 08:08:12,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [497622500] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 08:08:12,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 08:08:12,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 08:08:12,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927696485] [2022-04-15 08:08:12,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 08:08:12,391 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-15 08:08:12,392 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 08:08:12,392 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:12,406 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 16 edges. 16 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:12,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-15 08:08:12,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:12,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-15 08:08:12,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-15 08:08:12,408 INFO L87 Difference]: Start difference. First operand 32 states and 38 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:12,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:12,582 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-04-15 08:08:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-15 08:08:12,583 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-15 08:08:12,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 08:08:12,583 INFO L82 GeneralOperation]: Start removeUnreachable. 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:12,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2022-04-15 08:08:12,585 INFO L82 GeneralOperation]: Start removeUnreachable. 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:12,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 41 transitions. [2022-04-15 08:08:12,587 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 41 transitions. [2022-04-15 08:08:12,625 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 41 edges. 41 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:12,627 INFO L225 Difference]: With dead ends: 44 [2022-04-15 08:08:12,627 INFO L226 Difference]: Without dead ends: 41 [2022-04-15 08:08:12,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-15 08:08:12,630 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-15 08:08:12,630 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 66 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-15 08:08:12,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-15 08:08:12,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2022-04-15 08:08:12,650 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 08:08:12,651 INFO L82 GeneralOperation]: Start isEquivalent. First operand 41 states. Second operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 08:08:12,651 INFO L74 IsIncluded]: Start isIncluded. First operand 41 states. Second operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 08:08:12,651 INFO L87 Difference]: Start difference. First operand 41 states. Second operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 08:08:12,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:12,653 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-04-15 08:08:12,653 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-04-15 08:08:12,654 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:12,654 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:12,654 INFO L74 IsIncluded]: Start isIncluded. First operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 41 states. [2022-04-15 08:08:12,655 INFO L87 Difference]: Start difference. First operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 41 states. [2022-04-15 08:08:12,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:12,656 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-04-15 08:08:12,656 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-04-15 08:08:12,657 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:12,657 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:12,657 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 08:08:12,657 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 08:08:12,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 08:08:12,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-04-15 08:08:12,659 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 17 [2022-04-15 08:08:12,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 08:08:12,659 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-04-15 08:08:12,659 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 08:08:12,660 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 32 states and 38 transitions. [2022-04-15 08:08:12,698 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 38 edges. 38 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:12,699 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-04-15 08:08:12,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-15 08:08:12,699 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 08:08:12,699 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 08:08:12,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-15 08:08:12,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 08:08:12,901 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 08:08:12,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 08:08:12,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1626008211, now seen corresponding path program 1 times [2022-04-15 08:08:12,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:12,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1538173586] [2022-04-15 08:08:12,902 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-15 08:08:12,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1626008211, now seen corresponding path program 2 times [2022-04-15 08:08:12,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 08:08:12,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43258129] [2022-04-15 08:08:12,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 08:08:12,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 08:08:12,917 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 08:08:12,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655952274] [2022-04-15 08:08:12,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 08:08:12,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 08:08:12,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 08:08:12,919 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 08:08:12,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-15 08:08:12,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-15 08:08:12,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 08:08:12,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-15 08:08:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 08:08:12,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 08:08:13,164 INFO L272 TraceCheckUtils]: 0: Hoare triple {1149#true} call ULTIMATE.init(); {1149#true} is VALID [2022-04-15 08:08:13,165 INFO L290 TraceCheckUtils]: 1: Hoare triple {1149#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {1157#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:13,166 INFO L290 TraceCheckUtils]: 2: Hoare triple {1157#(<= ~counter~0 0)} assume true; {1157#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:13,167 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1157#(<= ~counter~0 0)} {1149#true} #82#return; {1157#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:13,167 INFO L272 TraceCheckUtils]: 4: Hoare triple {1157#(<= ~counter~0 0)} call #t~ret4 := main(); {1157#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:13,168 INFO L290 TraceCheckUtils]: 5: Hoare triple {1157#(<= ~counter~0 0)} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {1157#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:13,172 INFO L290 TraceCheckUtils]: 6: Hoare triple {1157#(<= ~counter~0 0)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {1173#(<= ~counter~0 1)} is VALID [2022-04-15 08:08:13,172 INFO L290 TraceCheckUtils]: 7: Hoare triple {1173#(<= ~counter~0 1)} assume !!(#t~post2 < 20);havoc #t~post2; {1173#(<= ~counter~0 1)} is VALID [2022-04-15 08:08:13,173 INFO L290 TraceCheckUtils]: 8: Hoare triple {1173#(<= ~counter~0 1)} assume !(~r~0 % 4294967296 >= ~b~0 % 4294967296); {1173#(<= ~counter~0 1)} is VALID [2022-04-15 08:08:13,173 INFO L290 TraceCheckUtils]: 9: Hoare triple {1173#(<= ~counter~0 1)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1183#(<= ~counter~0 2)} is VALID [2022-04-15 08:08:13,174 INFO L290 TraceCheckUtils]: 10: Hoare triple {1183#(<= ~counter~0 2)} assume !!(#t~post3 < 20);havoc #t~post3; {1183#(<= ~counter~0 2)} is VALID [2022-04-15 08:08:13,175 INFO L272 TraceCheckUtils]: 11: Hoare triple {1183#(<= ~counter~0 2)} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1183#(<= ~counter~0 2)} is VALID [2022-04-15 08:08:13,175 INFO L290 TraceCheckUtils]: 12: Hoare triple {1183#(<= ~counter~0 2)} ~cond := #in~cond; {1183#(<= ~counter~0 2)} is VALID [2022-04-15 08:08:13,175 INFO L290 TraceCheckUtils]: 13: Hoare triple {1183#(<= ~counter~0 2)} assume !(0 == ~cond); {1183#(<= ~counter~0 2)} is VALID [2022-04-15 08:08:13,176 INFO L290 TraceCheckUtils]: 14: Hoare triple {1183#(<= ~counter~0 2)} assume true; {1183#(<= ~counter~0 2)} is VALID [2022-04-15 08:08:13,177 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {1183#(<= ~counter~0 2)} {1183#(<= ~counter~0 2)} #78#return; {1183#(<= ~counter~0 2)} is VALID [2022-04-15 08:08:13,177 INFO L290 TraceCheckUtils]: 16: Hoare triple {1183#(<= ~counter~0 2)} assume !!(~b~0 % 4294967296 != ~B~0 % 4294967296);~q~0 := 2 * ~q~0;~b~0 := (if ~b~0 % 4294967296 < 0 && 0 != ~b~0 % 4294967296 % 2 then 1 + ~b~0 % 4294967296 / 2 else ~b~0 % 4294967296 / 2); {1183#(<= ~counter~0 2)} is VALID [2022-04-15 08:08:13,178 INFO L290 TraceCheckUtils]: 17: Hoare triple {1183#(<= ~counter~0 2)} assume ~r~0 % 4294967296 >= ~b~0 % 4294967296;~q~0 := 1 + ~q~0;~r~0 := ~r~0 - ~b~0; {1183#(<= ~counter~0 2)} is VALID [2022-04-15 08:08:13,178 INFO L290 TraceCheckUtils]: 18: Hoare triple {1183#(<= ~counter~0 2)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1211#(<= |main_#t~post3| 2)} is VALID [2022-04-15 08:08:13,179 INFO L290 TraceCheckUtils]: 19: Hoare triple {1211#(<= |main_#t~post3| 2)} assume !(#t~post3 < 20);havoc #t~post3; {1150#false} is VALID [2022-04-15 08:08:13,179 INFO L272 TraceCheckUtils]: 20: Hoare triple {1150#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1150#false} is VALID [2022-04-15 08:08:13,179 INFO L290 TraceCheckUtils]: 21: Hoare triple {1150#false} ~cond := #in~cond; {1150#false} is VALID [2022-04-15 08:08:13,179 INFO L290 TraceCheckUtils]: 22: Hoare triple {1150#false} assume 0 == ~cond; {1150#false} is VALID [2022-04-15 08:08:13,179 INFO L290 TraceCheckUtils]: 23: Hoare triple {1150#false} assume !false; {1150#false} is VALID [2022-04-15 08:08:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 08:08:13,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-15 08:08:13,407 INFO L290 TraceCheckUtils]: 23: Hoare triple {1150#false} assume !false; {1150#false} is VALID [2022-04-15 08:08:13,408 INFO L290 TraceCheckUtils]: 22: Hoare triple {1150#false} assume 0 == ~cond; {1150#false} is VALID [2022-04-15 08:08:13,408 INFO L290 TraceCheckUtils]: 21: Hoare triple {1150#false} ~cond := #in~cond; {1150#false} is VALID [2022-04-15 08:08:13,408 INFO L272 TraceCheckUtils]: 20: Hoare triple {1150#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1150#false} is VALID [2022-04-15 08:08:13,410 INFO L290 TraceCheckUtils]: 19: Hoare triple {1239#(< |main_#t~post3| 20)} assume !(#t~post3 < 20);havoc #t~post3; {1150#false} is VALID [2022-04-15 08:08:13,410 INFO L290 TraceCheckUtils]: 18: Hoare triple {1243#(< ~counter~0 20)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1239#(< |main_#t~post3| 20)} is VALID [2022-04-15 08:08:13,410 INFO L290 TraceCheckUtils]: 17: Hoare triple {1243#(< ~counter~0 20)} assume ~r~0 % 4294967296 >= ~b~0 % 4294967296;~q~0 := 1 + ~q~0;~r~0 := ~r~0 - ~b~0; {1243#(< ~counter~0 20)} is VALID [2022-04-15 08:08:13,411 INFO L290 TraceCheckUtils]: 16: Hoare triple {1243#(< ~counter~0 20)} assume !!(~b~0 % 4294967296 != ~B~0 % 4294967296);~q~0 := 2 * ~q~0;~b~0 := (if ~b~0 % 4294967296 < 0 && 0 != ~b~0 % 4294967296 % 2 then 1 + ~b~0 % 4294967296 / 2 else ~b~0 % 4294967296 / 2); {1243#(< ~counter~0 20)} is VALID [2022-04-15 08:08:13,411 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {1149#true} {1243#(< ~counter~0 20)} #78#return; {1243#(< ~counter~0 20)} is VALID [2022-04-15 08:08:13,412 INFO L290 TraceCheckUtils]: 14: Hoare triple {1149#true} assume true; {1149#true} is VALID [2022-04-15 08:08:13,412 INFO L290 TraceCheckUtils]: 13: Hoare triple {1149#true} assume !(0 == ~cond); {1149#true} is VALID [2022-04-15 08:08:13,412 INFO L290 TraceCheckUtils]: 12: Hoare triple {1149#true} ~cond := #in~cond; {1149#true} is VALID [2022-04-15 08:08:13,412 INFO L272 TraceCheckUtils]: 11: Hoare triple {1243#(< ~counter~0 20)} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1149#true} is VALID [2022-04-15 08:08:13,412 INFO L290 TraceCheckUtils]: 10: Hoare triple {1243#(< ~counter~0 20)} assume !!(#t~post3 < 20);havoc #t~post3; {1243#(< ~counter~0 20)} is VALID [2022-04-15 08:08:13,413 INFO L290 TraceCheckUtils]: 9: Hoare triple {1271#(< ~counter~0 19)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1243#(< ~counter~0 20)} is VALID [2022-04-15 08:08:13,414 INFO L290 TraceCheckUtils]: 8: Hoare triple {1271#(< ~counter~0 19)} assume !(~r~0 % 4294967296 >= ~b~0 % 4294967296); {1271#(< ~counter~0 19)} is VALID [2022-04-15 08:08:13,414 INFO L290 TraceCheckUtils]: 7: Hoare triple {1271#(< ~counter~0 19)} assume !!(#t~post2 < 20);havoc #t~post2; {1271#(< ~counter~0 19)} is VALID [2022-04-15 08:08:13,415 INFO L290 TraceCheckUtils]: 6: Hoare triple {1281#(< ~counter~0 18)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {1271#(< ~counter~0 19)} is VALID [2022-04-15 08:08:13,416 INFO L290 TraceCheckUtils]: 5: Hoare triple {1281#(< ~counter~0 18)} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {1281#(< ~counter~0 18)} is VALID [2022-04-15 08:08:13,417 INFO L272 TraceCheckUtils]: 4: Hoare triple {1281#(< ~counter~0 18)} call #t~ret4 := main(); {1281#(< ~counter~0 18)} is VALID [2022-04-15 08:08:13,427 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1281#(< ~counter~0 18)} {1149#true} #82#return; {1281#(< ~counter~0 18)} is VALID [2022-04-15 08:08:13,428 INFO L290 TraceCheckUtils]: 2: Hoare triple {1281#(< ~counter~0 18)} assume true; {1281#(< ~counter~0 18)} is VALID [2022-04-15 08:08:13,429 INFO L290 TraceCheckUtils]: 1: Hoare triple {1149#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {1281#(< ~counter~0 18)} is VALID [2022-04-15 08:08:13,429 INFO L272 TraceCheckUtils]: 0: Hoare triple {1149#true} call ULTIMATE.init(); {1149#true} is VALID [2022-04-15 08:08:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 08:08:13,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 08:08:13,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43258129] [2022-04-15 08:08:13,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 08:08:13,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655952274] [2022-04-15 08:08:13,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655952274] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-15 08:08:13,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-15 08:08:13,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-15 08:08:13,430 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 08:08:13,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1538173586] [2022-04-15 08:08:13,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1538173586] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 08:08:13,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 08:08:13,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-15 08:08:13,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352005202] [2022-04-15 08:08:13,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 08:08:13,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-04-15 08:08:13,432 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 08:08:13,432 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:13,452 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:13,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-15 08:08:13,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:13,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-15 08:08:13,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-15 08:08:13,456 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:13,572 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-04-15 08:08:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-15 08:08:13,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-04-15 08:08:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 08:08:13,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:13,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 55 transitions. [2022-04-15 08:08:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:13,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 55 transitions. [2022-04-15 08:08:13,582 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 7 states and 55 transitions. [2022-04-15 08:08:13,621 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 55 edges. 55 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:13,622 INFO L225 Difference]: With dead ends: 57 [2022-04-15 08:08:13,622 INFO L226 Difference]: Without dead ends: 50 [2022-04-15 08:08:13,623 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-04-15 08:08:13,624 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 08:08:13,625 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 85 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 08:08:13,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-15 08:08:13,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2022-04-15 08:08:13,663 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 08:08:13,663 INFO L82 GeneralOperation]: Start isEquivalent. First operand 50 states. Second operand has 44 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 08:08:13,664 INFO L74 IsIncluded]: Start isIncluded. First operand 50 states. Second operand has 44 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 08:08:13,664 INFO L87 Difference]: Start difference. First operand 50 states. Second operand has 44 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 08:08:13,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:13,666 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-04-15 08:08:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-04-15 08:08:13,666 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:13,666 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:13,666 INFO L74 IsIncluded]: Start isIncluded. First operand has 44 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 50 states. [2022-04-15 08:08:13,666 INFO L87 Difference]: Start difference. First operand has 44 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 50 states. [2022-04-15 08:08:13,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:13,669 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2022-04-15 08:08:13,669 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-04-15 08:08:13,670 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:13,670 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:13,670 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 08:08:13,670 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 08:08:13,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 34 states have internal predecessors, (42), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 08:08:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-04-15 08:08:13,673 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 24 [2022-04-15 08:08:13,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 08:08:13,675 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-04-15 08:08:13,677 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:13,677 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 44 states and 52 transitions. [2022-04-15 08:08:13,729 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 52 edges. 52 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:13,729 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-04-15 08:08:13,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-15 08:08:13,729 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 08:08:13,730 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 08:08:13,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-15 08:08:13,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 08:08:13,944 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 08:08:13,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 08:08:13,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1627795671, now seen corresponding path program 1 times [2022-04-15 08:08:13,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:13,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1127855588] [2022-04-15 08:08:13,945 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-15 08:08:13,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1627795671, now seen corresponding path program 2 times [2022-04-15 08:08:13,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 08:08:13,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123606283] [2022-04-15 08:08:13,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 08:08:13,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 08:08:13,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 08:08:13,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167799675] [2022-04-15 08:08:13,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 08:08:13,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 08:08:13,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 08:08:13,968 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 08:08:13,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-15 08:08:14,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-15 08:08:14,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 08:08:14,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-15 08:08:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 08:08:14,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 08:08:14,134 INFO L272 TraceCheckUtils]: 0: Hoare triple {1606#true} call ULTIMATE.init(); {1606#true} is VALID [2022-04-15 08:08:14,134 INFO L290 TraceCheckUtils]: 1: Hoare triple {1606#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {1606#true} is VALID [2022-04-15 08:08:14,135 INFO L290 TraceCheckUtils]: 2: Hoare triple {1606#true} assume true; {1606#true} is VALID [2022-04-15 08:08:14,135 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1606#true} {1606#true} #82#return; {1606#true} is VALID [2022-04-15 08:08:14,135 INFO L272 TraceCheckUtils]: 4: Hoare triple {1606#true} call #t~ret4 := main(); {1606#true} is VALID [2022-04-15 08:08:14,135 INFO L290 TraceCheckUtils]: 5: Hoare triple {1606#true} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-15 08:08:14,136 INFO L290 TraceCheckUtils]: 6: Hoare triple {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-15 08:08:14,136 INFO L290 TraceCheckUtils]: 7: Hoare triple {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} assume !!(#t~post2 < 20);havoc #t~post2; {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-15 08:08:14,137 INFO L290 TraceCheckUtils]: 8: Hoare triple {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} assume !(~r~0 % 4294967296 >= ~b~0 % 4294967296); {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-15 08:08:14,137 INFO L290 TraceCheckUtils]: 9: Hoare triple {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-15 08:08:14,138 INFO L290 TraceCheckUtils]: 10: Hoare triple {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} assume !!(#t~post3 < 20);havoc #t~post3; {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-15 08:08:14,138 INFO L272 TraceCheckUtils]: 11: Hoare triple {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1606#true} is VALID [2022-04-15 08:08:14,138 INFO L290 TraceCheckUtils]: 12: Hoare triple {1606#true} ~cond := #in~cond; {1606#true} is VALID [2022-04-15 08:08:14,138 INFO L290 TraceCheckUtils]: 13: Hoare triple {1606#true} assume !(0 == ~cond); {1606#true} is VALID [2022-04-15 08:08:14,138 INFO L290 TraceCheckUtils]: 14: Hoare triple {1606#true} assume true; {1606#true} is VALID [2022-04-15 08:08:14,139 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {1606#true} {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} #78#return; {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} is VALID [2022-04-15 08:08:14,140 INFO L290 TraceCheckUtils]: 16: Hoare triple {1626#(and (= main_~B~0 main_~b~0) (= main_~B~0 1))} assume !!(~b~0 % 4294967296 != ~B~0 % 4294967296);~q~0 := 2 * ~q~0;~b~0 := (if ~b~0 % 4294967296 < 0 && 0 != ~b~0 % 4294967296 % 2 then 1 + ~b~0 % 4294967296 / 2 else ~b~0 % 4294967296 / 2); {1607#false} is VALID [2022-04-15 08:08:14,140 INFO L290 TraceCheckUtils]: 17: Hoare triple {1607#false} assume ~r~0 % 4294967296 >= ~b~0 % 4294967296;~q~0 := 1 + ~q~0;~r~0 := ~r~0 - ~b~0; {1607#false} is VALID [2022-04-15 08:08:14,140 INFO L290 TraceCheckUtils]: 18: Hoare triple {1607#false} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1607#false} is VALID [2022-04-15 08:08:14,140 INFO L290 TraceCheckUtils]: 19: Hoare triple {1607#false} assume !!(#t~post3 < 20);havoc #t~post3; {1607#false} is VALID [2022-04-15 08:08:14,140 INFO L272 TraceCheckUtils]: 20: Hoare triple {1607#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1607#false} is VALID [2022-04-15 08:08:14,140 INFO L290 TraceCheckUtils]: 21: Hoare triple {1607#false} ~cond := #in~cond; {1607#false} is VALID [2022-04-15 08:08:14,140 INFO L290 TraceCheckUtils]: 22: Hoare triple {1607#false} assume 0 == ~cond; {1607#false} is VALID [2022-04-15 08:08:14,140 INFO L290 TraceCheckUtils]: 23: Hoare triple {1607#false} assume !false; {1607#false} is VALID [2022-04-15 08:08:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 08:08:14,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 08:08:14,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 08:08:14,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123606283] [2022-04-15 08:08:14,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 08:08:14,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167799675] [2022-04-15 08:08:14,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167799675] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 08:08:14,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 08:08:14,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-15 08:08:14,143 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 08:08:14,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1127855588] [2022-04-15 08:08:14,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1127855588] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 08:08:14,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 08:08:14,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-15 08:08:14,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504095678] [2022-04-15 08:08:14,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 08:08:14,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-04-15 08:08:14,145 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 08:08:14,145 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:14,163 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:14,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-15 08:08:14,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:14,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-15 08:08:14,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-15 08:08:14,164 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:16,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:16,453 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-04-15 08:08:16,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-15 08:08:16,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-04-15 08:08:16,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 08:08:16,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:16,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2022-04-15 08:08:16,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:16,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2022-04-15 08:08:16,456 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 50 transitions. [2022-04-15 08:08:16,509 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 50 edges. 50 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:16,509 INFO L225 Difference]: With dead ends: 65 [2022-04-15 08:08:16,510 INFO L226 Difference]: Without dead ends: 33 [2022-04-15 08:08:16,510 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-15 08:08:16,511 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 08:08:16,511 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 08:08:16,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-15 08:08:16,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-15 08:08:16,540 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 08:08:16,541 INFO L82 GeneralOperation]: Start isEquivalent. First operand 33 states. Second operand has 33 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 08:08:16,541 INFO L74 IsIncluded]: Start isIncluded. First operand 33 states. Second operand has 33 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 08:08:16,541 INFO L87 Difference]: Start difference. First operand 33 states. Second operand has 33 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 08:08:16,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:16,542 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-04-15 08:08:16,542 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-04-15 08:08:16,542 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:16,542 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:16,543 INFO L74 IsIncluded]: Start isIncluded. First operand has 33 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 33 states. [2022-04-15 08:08:16,543 INFO L87 Difference]: Start difference. First operand has 33 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 33 states. [2022-04-15 08:08:16,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:16,544 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-04-15 08:08:16,544 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-04-15 08:08:16,544 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:16,545 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:16,545 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 08:08:16,545 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 08:08:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 08:08:16,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-04-15 08:08:16,546 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2022-04-15 08:08:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 08:08:16,546 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-04-15 08:08:16,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:16,546 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 33 states and 39 transitions. [2022-04-15 08:08:16,602 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 39 edges. 39 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:16,602 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-04-15 08:08:16,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-15 08:08:16,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 08:08:16,603 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 08:08:16,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-15 08:08:16,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 08:08:16,812 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 08:08:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 08:08:16,812 INFO L85 PathProgramCache]: Analyzing trace with hash 76649582, now seen corresponding path program 1 times [2022-04-15 08:08:16,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:16,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [241416676] [2022-04-15 08:08:16,819 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-15 08:08:16,819 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-15 08:08:16,819 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-15 08:08:16,819 INFO L85 PathProgramCache]: Analyzing trace with hash 76649582, now seen corresponding path program 2 times [2022-04-15 08:08:16,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 08:08:16,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230759796] [2022-04-15 08:08:16,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 08:08:16,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 08:08:16,835 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 08:08:16,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626432311] [2022-04-15 08:08:16,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 08:08:16,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 08:08:16,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 08:08:16,837 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 08:08:16,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-15 08:08:16,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-15 08:08:16,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 08:08:16,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-15 08:08:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 08:08:16,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 08:08:17,055 INFO L272 TraceCheckUtils]: 0: Hoare triple {1942#true} call ULTIMATE.init(); {1942#true} is VALID [2022-04-15 08:08:17,056 INFO L290 TraceCheckUtils]: 1: Hoare triple {1942#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {1950#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:17,057 INFO L290 TraceCheckUtils]: 2: Hoare triple {1950#(<= ~counter~0 0)} assume true; {1950#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:17,057 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1950#(<= ~counter~0 0)} {1942#true} #82#return; {1950#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:17,058 INFO L272 TraceCheckUtils]: 4: Hoare triple {1950#(<= ~counter~0 0)} call #t~ret4 := main(); {1950#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:17,058 INFO L290 TraceCheckUtils]: 5: Hoare triple {1950#(<= ~counter~0 0)} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {1950#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:17,059 INFO L290 TraceCheckUtils]: 6: Hoare triple {1950#(<= ~counter~0 0)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {1966#(<= ~counter~0 1)} is VALID [2022-04-15 08:08:17,059 INFO L290 TraceCheckUtils]: 7: Hoare triple {1966#(<= ~counter~0 1)} assume !!(#t~post2 < 20);havoc #t~post2; {1966#(<= ~counter~0 1)} is VALID [2022-04-15 08:08:17,060 INFO L290 TraceCheckUtils]: 8: Hoare triple {1966#(<= ~counter~0 1)} assume !!(~r~0 % 4294967296 >= ~b~0 % 4294967296);~b~0 := 2 * ~b~0; {1966#(<= ~counter~0 1)} is VALID [2022-04-15 08:08:17,060 INFO L290 TraceCheckUtils]: 9: Hoare triple {1966#(<= ~counter~0 1)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {1976#(<= |main_#t~post2| 1)} is VALID [2022-04-15 08:08:17,061 INFO L290 TraceCheckUtils]: 10: Hoare triple {1976#(<= |main_#t~post2| 1)} assume !(#t~post2 < 20);havoc #t~post2; {1943#false} is VALID [2022-04-15 08:08:17,061 INFO L290 TraceCheckUtils]: 11: Hoare triple {1943#false} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1943#false} is VALID [2022-04-15 08:08:17,061 INFO L290 TraceCheckUtils]: 12: Hoare triple {1943#false} assume !!(#t~post3 < 20);havoc #t~post3; {1943#false} is VALID [2022-04-15 08:08:17,061 INFO L272 TraceCheckUtils]: 13: Hoare triple {1943#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1943#false} is VALID [2022-04-15 08:08:17,061 INFO L290 TraceCheckUtils]: 14: Hoare triple {1943#false} ~cond := #in~cond; {1943#false} is VALID [2022-04-15 08:08:17,061 INFO L290 TraceCheckUtils]: 15: Hoare triple {1943#false} assume !(0 == ~cond); {1943#false} is VALID [2022-04-15 08:08:17,062 INFO L290 TraceCheckUtils]: 16: Hoare triple {1943#false} assume true; {1943#false} is VALID [2022-04-15 08:08:17,062 INFO L284 TraceCheckUtils]: 17: Hoare quadruple {1943#false} {1943#false} #78#return; {1943#false} is VALID [2022-04-15 08:08:17,062 INFO L290 TraceCheckUtils]: 18: Hoare triple {1943#false} assume !!(~b~0 % 4294967296 != ~B~0 % 4294967296);~q~0 := 2 * ~q~0;~b~0 := (if ~b~0 % 4294967296 < 0 && 0 != ~b~0 % 4294967296 % 2 then 1 + ~b~0 % 4294967296 / 2 else ~b~0 % 4294967296 / 2); {1943#false} is VALID [2022-04-15 08:08:17,062 INFO L290 TraceCheckUtils]: 19: Hoare triple {1943#false} assume ~r~0 % 4294967296 >= ~b~0 % 4294967296;~q~0 := 1 + ~q~0;~r~0 := ~r~0 - ~b~0; {1943#false} is VALID [2022-04-15 08:08:17,062 INFO L290 TraceCheckUtils]: 20: Hoare triple {1943#false} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1943#false} is VALID [2022-04-15 08:08:17,062 INFO L290 TraceCheckUtils]: 21: Hoare triple {1943#false} assume !(#t~post3 < 20);havoc #t~post3; {1943#false} is VALID [2022-04-15 08:08:17,062 INFO L272 TraceCheckUtils]: 22: Hoare triple {1943#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1943#false} is VALID [2022-04-15 08:08:17,063 INFO L290 TraceCheckUtils]: 23: Hoare triple {1943#false} ~cond := #in~cond; {1943#false} is VALID [2022-04-15 08:08:17,063 INFO L290 TraceCheckUtils]: 24: Hoare triple {1943#false} assume 0 == ~cond; {1943#false} is VALID [2022-04-15 08:08:17,063 INFO L290 TraceCheckUtils]: 25: Hoare triple {1943#false} assume !false; {1943#false} is VALID [2022-04-15 08:08:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-15 08:08:17,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-15 08:08:17,277 INFO L290 TraceCheckUtils]: 25: Hoare triple {1943#false} assume !false; {1943#false} is VALID [2022-04-15 08:08:17,277 INFO L290 TraceCheckUtils]: 24: Hoare triple {1943#false} assume 0 == ~cond; {1943#false} is VALID [2022-04-15 08:08:17,277 INFO L290 TraceCheckUtils]: 23: Hoare triple {1943#false} ~cond := #in~cond; {1943#false} is VALID [2022-04-15 08:08:17,277 INFO L272 TraceCheckUtils]: 22: Hoare triple {1943#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1943#false} is VALID [2022-04-15 08:08:17,277 INFO L290 TraceCheckUtils]: 21: Hoare triple {1943#false} assume !(#t~post3 < 20);havoc #t~post3; {1943#false} is VALID [2022-04-15 08:08:17,278 INFO L290 TraceCheckUtils]: 20: Hoare triple {1943#false} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1943#false} is VALID [2022-04-15 08:08:17,278 INFO L290 TraceCheckUtils]: 19: Hoare triple {1943#false} assume ~r~0 % 4294967296 >= ~b~0 % 4294967296;~q~0 := 1 + ~q~0;~r~0 := ~r~0 - ~b~0; {1943#false} is VALID [2022-04-15 08:08:17,278 INFO L290 TraceCheckUtils]: 18: Hoare triple {1943#false} assume !!(~b~0 % 4294967296 != ~B~0 % 4294967296);~q~0 := 2 * ~q~0;~b~0 := (if ~b~0 % 4294967296 < 0 && 0 != ~b~0 % 4294967296 % 2 then 1 + ~b~0 % 4294967296 / 2 else ~b~0 % 4294967296 / 2); {1943#false} is VALID [2022-04-15 08:08:17,278 INFO L284 TraceCheckUtils]: 17: Hoare quadruple {1942#true} {1943#false} #78#return; {1943#false} is VALID [2022-04-15 08:08:17,278 INFO L290 TraceCheckUtils]: 16: Hoare triple {1942#true} assume true; {1942#true} is VALID [2022-04-15 08:08:17,278 INFO L290 TraceCheckUtils]: 15: Hoare triple {1942#true} assume !(0 == ~cond); {1942#true} is VALID [2022-04-15 08:08:17,278 INFO L290 TraceCheckUtils]: 14: Hoare triple {1942#true} ~cond := #in~cond; {1942#true} is VALID [2022-04-15 08:08:17,278 INFO L272 TraceCheckUtils]: 13: Hoare triple {1943#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {1942#true} is VALID [2022-04-15 08:08:17,279 INFO L290 TraceCheckUtils]: 12: Hoare triple {1943#false} assume !!(#t~post3 < 20);havoc #t~post3; {1943#false} is VALID [2022-04-15 08:08:17,279 INFO L290 TraceCheckUtils]: 11: Hoare triple {1943#false} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {1943#false} is VALID [2022-04-15 08:08:17,283 INFO L290 TraceCheckUtils]: 10: Hoare triple {2070#(< |main_#t~post2| 20)} assume !(#t~post2 < 20);havoc #t~post2; {1943#false} is VALID [2022-04-15 08:08:17,283 INFO L290 TraceCheckUtils]: 9: Hoare triple {2074#(< ~counter~0 20)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {2070#(< |main_#t~post2| 20)} is VALID [2022-04-15 08:08:17,284 INFO L290 TraceCheckUtils]: 8: Hoare triple {2074#(< ~counter~0 20)} assume !!(~r~0 % 4294967296 >= ~b~0 % 4294967296);~b~0 := 2 * ~b~0; {2074#(< ~counter~0 20)} is VALID [2022-04-15 08:08:17,284 INFO L290 TraceCheckUtils]: 7: Hoare triple {2074#(< ~counter~0 20)} assume !!(#t~post2 < 20);havoc #t~post2; {2074#(< ~counter~0 20)} is VALID [2022-04-15 08:08:17,285 INFO L290 TraceCheckUtils]: 6: Hoare triple {2084#(< ~counter~0 19)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {2074#(< ~counter~0 20)} is VALID [2022-04-15 08:08:17,285 INFO L290 TraceCheckUtils]: 5: Hoare triple {2084#(< ~counter~0 19)} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {2084#(< ~counter~0 19)} is VALID [2022-04-15 08:08:17,291 INFO L272 TraceCheckUtils]: 4: Hoare triple {2084#(< ~counter~0 19)} call #t~ret4 := main(); {2084#(< ~counter~0 19)} is VALID [2022-04-15 08:08:17,292 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {2084#(< ~counter~0 19)} {1942#true} #82#return; {2084#(< ~counter~0 19)} is VALID [2022-04-15 08:08:17,292 INFO L290 TraceCheckUtils]: 2: Hoare triple {2084#(< ~counter~0 19)} assume true; {2084#(< ~counter~0 19)} is VALID [2022-04-15 08:08:17,297 INFO L290 TraceCheckUtils]: 1: Hoare triple {1942#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {2084#(< ~counter~0 19)} is VALID [2022-04-15 08:08:17,297 INFO L272 TraceCheckUtils]: 0: Hoare triple {1942#true} call ULTIMATE.init(); {1942#true} is VALID [2022-04-15 08:08:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-15 08:08:17,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 08:08:17,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230759796] [2022-04-15 08:08:17,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 08:08:17,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626432311] [2022-04-15 08:08:17,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626432311] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-15 08:08:17,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-15 08:08:17,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-15 08:08:17,298 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 08:08:17,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [241416676] [2022-04-15 08:08:17,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [241416676] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 08:08:17,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 08:08:17,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 08:08:17,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821682748] [2022-04-15 08:08:17,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 08:08:17,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-04-15 08:08:17,299 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 08:08:17,299 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:17,320 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:17,321 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-15 08:08:17,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:17,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-15 08:08:17,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-15 08:08:17,321 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:17,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:17,464 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2022-04-15 08:08:17,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-15 08:08:17,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-04-15 08:08:17,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 08:08:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 47 transitions. [2022-04-15 08:08:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 47 transitions. [2022-04-15 08:08:17,467 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 47 transitions. [2022-04-15 08:08:17,509 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 47 edges. 47 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:17,510 INFO L225 Difference]: With dead ends: 56 [2022-04-15 08:08:17,510 INFO L226 Difference]: Without dead ends: 35 [2022-04-15 08:08:17,510 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-15 08:08:17,511 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 08:08:17,511 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 83 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 08:08:17,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-15 08:08:17,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-15 08:08:17,534 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 08:08:17,534 INFO L82 GeneralOperation]: Start isEquivalent. First operand 35 states. Second operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 08:08:17,535 INFO L74 IsIncluded]: Start isIncluded. First operand 35 states. Second operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 08:08:17,535 INFO L87 Difference]: Start difference. First operand 35 states. Second operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 08:08:17,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:17,536 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-04-15 08:08:17,536 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-04-15 08:08:17,536 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:17,537 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:17,537 INFO L74 IsIncluded]: Start isIncluded. First operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 35 states. [2022-04-15 08:08:17,537 INFO L87 Difference]: Start difference. First operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 35 states. [2022-04-15 08:08:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:17,538 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-04-15 08:08:17,538 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-04-15 08:08:17,538 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:17,538 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:17,538 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 08:08:17,539 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 08:08:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 08:08:17,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-04-15 08:08:17,540 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2022-04-15 08:08:17,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 08:08:17,540 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-04-15 08:08:17,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:17,541 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 35 states and 41 transitions. [2022-04-15 08:08:17,591 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 41 edges. 41 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:17,591 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-04-15 08:08:17,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-15 08:08:17,592 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 08:08:17,592 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 08:08:17,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-15 08:08:17,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 08:08:17,793 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 08:08:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 08:08:17,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1817538190, now seen corresponding path program 1 times [2022-04-15 08:08:17,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:17,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1796559208] [2022-04-15 08:08:17,810 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-15 08:08:17,810 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-15 08:08:17,810 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-15 08:08:17,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1817538190, now seen corresponding path program 2 times [2022-04-15 08:08:17,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 08:08:17,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994974339] [2022-04-15 08:08:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 08:08:17,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 08:08:17,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 08:08:17,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113005868] [2022-04-15 08:08:17,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 08:08:17,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 08:08:17,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 08:08:17,825 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 08:08:17,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-15 08:08:17,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-15 08:08:17,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 08:08:17,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-15 08:08:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 08:08:17,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 08:08:18,106 INFO L272 TraceCheckUtils]: 0: Hoare triple {2359#true} call ULTIMATE.init(); {2359#true} is VALID [2022-04-15 08:08:18,107 INFO L290 TraceCheckUtils]: 1: Hoare triple {2359#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {2367#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:18,107 INFO L290 TraceCheckUtils]: 2: Hoare triple {2367#(<= ~counter~0 0)} assume true; {2367#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:18,108 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {2367#(<= ~counter~0 0)} {2359#true} #82#return; {2367#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:18,108 INFO L272 TraceCheckUtils]: 4: Hoare triple {2367#(<= ~counter~0 0)} call #t~ret4 := main(); {2367#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:18,108 INFO L290 TraceCheckUtils]: 5: Hoare triple {2367#(<= ~counter~0 0)} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {2367#(<= ~counter~0 0)} is VALID [2022-04-15 08:08:18,109 INFO L290 TraceCheckUtils]: 6: Hoare triple {2367#(<= ~counter~0 0)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {2383#(<= ~counter~0 1)} is VALID [2022-04-15 08:08:18,109 INFO L290 TraceCheckUtils]: 7: Hoare triple {2383#(<= ~counter~0 1)} assume !!(#t~post2 < 20);havoc #t~post2; {2383#(<= ~counter~0 1)} is VALID [2022-04-15 08:08:18,110 INFO L290 TraceCheckUtils]: 8: Hoare triple {2383#(<= ~counter~0 1)} assume !!(~r~0 % 4294967296 >= ~b~0 % 4294967296);~b~0 := 2 * ~b~0; {2383#(<= ~counter~0 1)} is VALID [2022-04-15 08:08:18,110 INFO L290 TraceCheckUtils]: 9: Hoare triple {2383#(<= ~counter~0 1)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {2393#(<= ~counter~0 2)} is VALID [2022-04-15 08:08:18,111 INFO L290 TraceCheckUtils]: 10: Hoare triple {2393#(<= ~counter~0 2)} assume !!(#t~post2 < 20);havoc #t~post2; {2393#(<= ~counter~0 2)} is VALID [2022-04-15 08:08:18,111 INFO L290 TraceCheckUtils]: 11: Hoare triple {2393#(<= ~counter~0 2)} assume !(~r~0 % 4294967296 >= ~b~0 % 4294967296); {2393#(<= ~counter~0 2)} is VALID [2022-04-15 08:08:18,111 INFO L290 TraceCheckUtils]: 12: Hoare triple {2393#(<= ~counter~0 2)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {2403#(<= ~counter~0 3)} is VALID [2022-04-15 08:08:18,112 INFO L290 TraceCheckUtils]: 13: Hoare triple {2403#(<= ~counter~0 3)} assume !!(#t~post3 < 20);havoc #t~post3; {2403#(<= ~counter~0 3)} is VALID [2022-04-15 08:08:18,112 INFO L272 TraceCheckUtils]: 14: Hoare triple {2403#(<= ~counter~0 3)} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {2403#(<= ~counter~0 3)} is VALID [2022-04-15 08:08:18,113 INFO L290 TraceCheckUtils]: 15: Hoare triple {2403#(<= ~counter~0 3)} ~cond := #in~cond; {2403#(<= ~counter~0 3)} is VALID [2022-04-15 08:08:18,113 INFO L290 TraceCheckUtils]: 16: Hoare triple {2403#(<= ~counter~0 3)} assume !(0 == ~cond); {2403#(<= ~counter~0 3)} is VALID [2022-04-15 08:08:18,113 INFO L290 TraceCheckUtils]: 17: Hoare triple {2403#(<= ~counter~0 3)} assume true; {2403#(<= ~counter~0 3)} is VALID [2022-04-15 08:08:18,114 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {2403#(<= ~counter~0 3)} {2403#(<= ~counter~0 3)} #78#return; {2403#(<= ~counter~0 3)} is VALID [2022-04-15 08:08:18,114 INFO L290 TraceCheckUtils]: 19: Hoare triple {2403#(<= ~counter~0 3)} assume !!(~b~0 % 4294967296 != ~B~0 % 4294967296);~q~0 := 2 * ~q~0;~b~0 := (if ~b~0 % 4294967296 < 0 && 0 != ~b~0 % 4294967296 % 2 then 1 + ~b~0 % 4294967296 / 2 else ~b~0 % 4294967296 / 2); {2403#(<= ~counter~0 3)} is VALID [2022-04-15 08:08:18,115 INFO L290 TraceCheckUtils]: 20: Hoare triple {2403#(<= ~counter~0 3)} assume ~r~0 % 4294967296 >= ~b~0 % 4294967296;~q~0 := 1 + ~q~0;~r~0 := ~r~0 - ~b~0; {2403#(<= ~counter~0 3)} is VALID [2022-04-15 08:08:18,115 INFO L290 TraceCheckUtils]: 21: Hoare triple {2403#(<= ~counter~0 3)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {2431#(<= |main_#t~post3| 3)} is VALID [2022-04-15 08:08:18,116 INFO L290 TraceCheckUtils]: 22: Hoare triple {2431#(<= |main_#t~post3| 3)} assume !(#t~post3 < 20);havoc #t~post3; {2360#false} is VALID [2022-04-15 08:08:18,116 INFO L272 TraceCheckUtils]: 23: Hoare triple {2360#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {2360#false} is VALID [2022-04-15 08:08:18,116 INFO L290 TraceCheckUtils]: 24: Hoare triple {2360#false} ~cond := #in~cond; {2360#false} is VALID [2022-04-15 08:08:18,116 INFO L290 TraceCheckUtils]: 25: Hoare triple {2360#false} assume 0 == ~cond; {2360#false} is VALID [2022-04-15 08:08:18,116 INFO L290 TraceCheckUtils]: 26: Hoare triple {2360#false} assume !false; {2360#false} is VALID [2022-04-15 08:08:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 08:08:18,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-15 08:08:18,364 INFO L290 TraceCheckUtils]: 26: Hoare triple {2360#false} assume !false; {2360#false} is VALID [2022-04-15 08:08:18,364 INFO L290 TraceCheckUtils]: 25: Hoare triple {2360#false} assume 0 == ~cond; {2360#false} is VALID [2022-04-15 08:08:18,365 INFO L290 TraceCheckUtils]: 24: Hoare triple {2360#false} ~cond := #in~cond; {2360#false} is VALID [2022-04-15 08:08:18,365 INFO L272 TraceCheckUtils]: 23: Hoare triple {2360#false} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {2360#false} is VALID [2022-04-15 08:08:18,365 INFO L290 TraceCheckUtils]: 22: Hoare triple {2459#(< |main_#t~post3| 20)} assume !(#t~post3 < 20);havoc #t~post3; {2360#false} is VALID [2022-04-15 08:08:18,366 INFO L290 TraceCheckUtils]: 21: Hoare triple {2463#(< ~counter~0 20)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {2459#(< |main_#t~post3| 20)} is VALID [2022-04-15 08:08:18,366 INFO L290 TraceCheckUtils]: 20: Hoare triple {2463#(< ~counter~0 20)} assume ~r~0 % 4294967296 >= ~b~0 % 4294967296;~q~0 := 1 + ~q~0;~r~0 := ~r~0 - ~b~0; {2463#(< ~counter~0 20)} is VALID [2022-04-15 08:08:18,366 INFO L290 TraceCheckUtils]: 19: Hoare triple {2463#(< ~counter~0 20)} assume !!(~b~0 % 4294967296 != ~B~0 % 4294967296);~q~0 := 2 * ~q~0;~b~0 := (if ~b~0 % 4294967296 < 0 && 0 != ~b~0 % 4294967296 % 2 then 1 + ~b~0 % 4294967296 / 2 else ~b~0 % 4294967296 / 2); {2463#(< ~counter~0 20)} is VALID [2022-04-15 08:08:18,367 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {2359#true} {2463#(< ~counter~0 20)} #78#return; {2463#(< ~counter~0 20)} is VALID [2022-04-15 08:08:18,367 INFO L290 TraceCheckUtils]: 17: Hoare triple {2359#true} assume true; {2359#true} is VALID [2022-04-15 08:08:18,368 INFO L290 TraceCheckUtils]: 16: Hoare triple {2359#true} assume !(0 == ~cond); {2359#true} is VALID [2022-04-15 08:08:18,368 INFO L290 TraceCheckUtils]: 15: Hoare triple {2359#true} ~cond := #in~cond; {2359#true} is VALID [2022-04-15 08:08:18,368 INFO L272 TraceCheckUtils]: 14: Hoare triple {2463#(< ~counter~0 20)} call __VERIFIER_assert((if ~A~0 % 4294967296 == (~q~0 * ~b~0 + ~r~0) % 4294967296 then 1 else 0)); {2359#true} is VALID [2022-04-15 08:08:18,368 INFO L290 TraceCheckUtils]: 13: Hoare triple {2463#(< ~counter~0 20)} assume !!(#t~post3 < 20);havoc #t~post3; {2463#(< ~counter~0 20)} is VALID [2022-04-15 08:08:18,369 INFO L290 TraceCheckUtils]: 12: Hoare triple {2491#(< ~counter~0 19)} #t~post3 := ~counter~0;~counter~0 := 1 + #t~post3; {2463#(< ~counter~0 20)} is VALID [2022-04-15 08:08:18,370 INFO L290 TraceCheckUtils]: 11: Hoare triple {2491#(< ~counter~0 19)} assume !(~r~0 % 4294967296 >= ~b~0 % 4294967296); {2491#(< ~counter~0 19)} is VALID [2022-04-15 08:08:18,370 INFO L290 TraceCheckUtils]: 10: Hoare triple {2491#(< ~counter~0 19)} assume !!(#t~post2 < 20);havoc #t~post2; {2491#(< ~counter~0 19)} is VALID [2022-04-15 08:08:18,371 INFO L290 TraceCheckUtils]: 9: Hoare triple {2501#(< ~counter~0 18)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {2491#(< ~counter~0 19)} is VALID [2022-04-15 08:08:18,371 INFO L290 TraceCheckUtils]: 8: Hoare triple {2501#(< ~counter~0 18)} assume !!(~r~0 % 4294967296 >= ~b~0 % 4294967296);~b~0 := 2 * ~b~0; {2501#(< ~counter~0 18)} is VALID [2022-04-15 08:08:18,371 INFO L290 TraceCheckUtils]: 7: Hoare triple {2501#(< ~counter~0 18)} assume !!(#t~post2 < 20);havoc #t~post2; {2501#(< ~counter~0 18)} is VALID [2022-04-15 08:08:18,372 INFO L290 TraceCheckUtils]: 6: Hoare triple {2511#(< ~counter~0 17)} #t~post2 := ~counter~0;~counter~0 := 1 + #t~post2; {2501#(< ~counter~0 18)} is VALID [2022-04-15 08:08:18,373 INFO L290 TraceCheckUtils]: 5: Hoare triple {2511#(< ~counter~0 17)} havoc ~A~0;havoc ~B~0;havoc ~q~0;havoc ~r~0;havoc ~b~0;~A~0 := #t~nondet1;havoc #t~nondet1;~B~0 := 1;~q~0 := 0;~r~0 := ~A~0;~b~0 := ~B~0; {2511#(< ~counter~0 17)} is VALID [2022-04-15 08:08:18,373 INFO L272 TraceCheckUtils]: 4: Hoare triple {2511#(< ~counter~0 17)} call #t~ret4 := main(); {2511#(< ~counter~0 17)} is VALID [2022-04-15 08:08:18,374 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {2511#(< ~counter~0 17)} {2359#true} #82#return; {2511#(< ~counter~0 17)} is VALID [2022-04-15 08:08:18,374 INFO L290 TraceCheckUtils]: 2: Hoare triple {2511#(< ~counter~0 17)} assume true; {2511#(< ~counter~0 17)} is VALID [2022-04-15 08:08:18,375 INFO L290 TraceCheckUtils]: 1: Hoare triple {2359#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);~counter~0 := 0; {2511#(< ~counter~0 17)} is VALID [2022-04-15 08:08:18,375 INFO L272 TraceCheckUtils]: 0: Hoare triple {2359#true} call ULTIMATE.init(); {2359#true} is VALID [2022-04-15 08:08:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 08:08:18,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 08:08:18,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994974339] [2022-04-15 08:08:18,376 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 08:08:18,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113005868] [2022-04-15 08:08:18,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113005868] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-15 08:08:18,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-15 08:08:18,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-15 08:08:18,376 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 08:08:18,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1796559208] [2022-04-15 08:08:18,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1796559208] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 08:08:18,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 08:08:18,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-15 08:08:18,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639991508] [2022-04-15 08:08:18,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 08:08:18,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-04-15 08:08:18,377 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 08:08:18,378 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:18,405 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 27 edges. 27 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:18,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-15 08:08:18,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:18,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-15 08:08:18,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-15 08:08:18,406 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:18,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:18,620 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2022-04-15 08:08:18,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-15 08:08:18,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-04-15 08:08:18,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 08:08:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 58 transitions. [2022-04-15 08:08:18,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:18,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 58 transitions. [2022-04-15 08:08:18,624 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 8 states and 58 transitions. [2022-04-15 08:08:18,675 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 58 edges. 58 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:18,676 INFO L225 Difference]: With dead ends: 60 [2022-04-15 08:08:18,676 INFO L226 Difference]: Without dead ends: 53 [2022-04-15 08:08:18,676 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2022-04-15 08:08:18,677 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 08:08:18,677 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 87 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 08:08:18,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-15 08:08:18,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2022-04-15 08:08:18,723 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 08:08:18,723 INFO L82 GeneralOperation]: Start isEquivalent. First operand 53 states. Second operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 08:08:18,723 INFO L74 IsIncluded]: Start isIncluded. First operand 53 states. Second operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 08:08:18,723 INFO L87 Difference]: Start difference. First operand 53 states. Second operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 08:08:18,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:18,726 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-04-15 08:08:18,726 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-04-15 08:08:18,726 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:18,726 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:18,726 INFO L74 IsIncluded]: Start isIncluded. First operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 53 states. [2022-04-15 08:08:18,726 INFO L87 Difference]: Start difference. First operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 53 states. [2022-04-15 08:08:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 08:08:18,728 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2022-04-15 08:08:18,728 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-04-15 08:08:18,728 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 08:08:18,728 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 08:08:18,728 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 08:08:18,728 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 08:08:18,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.25) internal successors, (45), 37 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 08:08:18,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-04-15 08:08:18,730 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 27 [2022-04-15 08:08:18,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 08:08:18,730 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-04-15 08:08:18,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 08:08:18,730 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 47 states and 55 transitions. [2022-04-15 08:08:18,805 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 55 edges. 55 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 08:08:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-04-15 08:08:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-15 08:08:18,806 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 08:08:18,806 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 08:08:18,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-15 08:08:19,006 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 08:08:19,007 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 08:08:19,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 08:08:19,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1815750730, now seen corresponding path program 1 times [2022-04-15 08:08:19,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 08:08:19,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [259306898] [2022-04-15 08:08:19,015 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-15 08:08:19,015 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-15 08:08:19,015 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-15 08:08:19,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1815750730, now seen corresponding path program 2 times [2022-04-15 08:08:19,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 08:08:19,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962077870] [2022-04-15 08:08:19,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 08:08:19,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 08:08:19,028 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 08:08:19,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752384847] [2022-04-15 08:08:19,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 08:08:19,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 08:08:19,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 08:08:19,030 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 08:08:19,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process