/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/n.c11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-08 08:59:55,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-08 08:59:55,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-08 08:59:55,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-08 08:59:55,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-08 08:59:55,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-08 08:59:55,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-08 08:59:55,845 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-08 08:59:55,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-08 08:59:55,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-08 08:59:55,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-08 08:59:55,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-08 08:59:55,852 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-08 08:59:55,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-08 08:59:55,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-08 08:59:55,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-08 08:59:55,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-08 08:59:55,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-08 08:59:55,860 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-08 08:59:55,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-08 08:59:55,862 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-08 08:59:55,862 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-08 08:59:55,867 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-08 08:59:55,867 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-08 08:59:55,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-08 08:59:55,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-08 08:59:55,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-08 08:59:55,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-08 08:59:55,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-08 08:59:55,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-08 08:59:55,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-08 08:59:55,869 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-08 08:59:55,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-08 08:59:55,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-08 08:59:55,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-08 08:59:55,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-08 08:59:55,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-08 08:59:55,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-08 08:59:55,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-08 08:59:55,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-08 08:59:55,870 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-08 08:59:55,870 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-08 08:59:55,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-08 08:59:55,870 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-08 08:59:55,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-08 08:59:56,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-08 08:59:56,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-08 08:59:56,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-08 08:59:56,060 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-08 08:59:56,061 INFO L275 PluginConnector]: CDTParser initialized [2022-04-08 08:59:56,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c11.c [2022-04-08 08:59:56,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9297c489d/9b200eaa12974ccabf72609c5dc3d471/FLAG42283818e [2022-04-08 08:59:56,450 INFO L306 CDTParser]: Found 1 translation units. [2022-04-08 08:59:56,451 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c [2022-04-08 08:59:56,455 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9297c489d/9b200eaa12974ccabf72609c5dc3d471/FLAG42283818e [2022-04-08 08:59:56,463 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9297c489d/9b200eaa12974ccabf72609c5dc3d471 [2022-04-08 08:59:56,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-08 08:59:56,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-08 08:59:56,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-08 08:59:56,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-08 08:59:56,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-08 08:59:56,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.04 08:59:56" (1/1) ... [2022-04-08 08:59:56,470 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dc5b5e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 08:59:56, skipping insertion in model container [2022-04-08 08:59:56,470 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.04 08:59:56" (1/1) ... [2022-04-08 08:59:56,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-08 08:59:56,480 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-08 08:59:56,620 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c[317,330] [2022-04-08 08:59:56,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-08 08:59:56,637 INFO L203 MainTranslator]: Completed pre-run [2022-04-08 08:59:56,645 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c11.c[317,330] [2022-04-08 08:59:56,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-08 08:59:56,655 INFO L208 MainTranslator]: Completed translation [2022-04-08 08:59:56,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 08:59:56 WrapperNode [2022-04-08 08:59:56,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-08 08:59:56,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-08 08:59:56,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-08 08:59:56,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-08 08:59:56,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 08:59:56" (1/1) ... [2022-04-08 08:59:56,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 08:59:56" (1/1) ... [2022-04-08 08:59:56,668 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 08:59:56" (1/1) ... [2022-04-08 08:59:56,668 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 08:59:56" (1/1) ... [2022-04-08 08:59:56,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 08:59:56" (1/1) ... [2022-04-08 08:59:56,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 08:59:56" (1/1) ... [2022-04-08 08:59:56,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 08:59:56" (1/1) ... [2022-04-08 08:59:56,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-08 08:59:56,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-08 08:59:56,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-08 08:59:56,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-08 08:59:56,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 08:59:56" (1/1) ... [2022-04-08 08:59:56,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-08 08:59:56,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 08:59:56,696 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) [2022-04-08 08:59:56,712 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 [2022-04-08 08:59:56,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-08 08:59:56,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-08 08:59:56,742 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-08 08:59:56,742 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-08 08:59:56,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-08 08:59:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-08 08:59:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-08 08:59:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-08 08:59:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-08 08:59:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-08 08:59:56,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-04-08 08:59:56,744 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-08 08:59:56,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-08 08:59:56,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-08 08:59:56,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-08 08:59:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-08 08:59:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-08 08:59:56,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-08 08:59:56,812 INFO L234 CfgBuilder]: Building ICFG [2022-04-08 08:59:56,813 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-08 08:59:56,923 INFO L275 CfgBuilder]: Performing block encoding [2022-04-08 08:59:56,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-08 08:59:56,928 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-08 08:59:56,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.04 08:59:56 BoogieIcfgContainer [2022-04-08 08:59:56,929 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-08 08:59:56,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-08 08:59:56,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-08 08:59:56,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-08 08:59:56,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.04 08:59:56" (1/3) ... [2022-04-08 08:59:56,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bff0281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.04 08:59:56, skipping insertion in model container [2022-04-08 08:59:56,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 08:59:56" (2/3) ... [2022-04-08 08:59:56,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bff0281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.04 08:59:56, skipping insertion in model container [2022-04-08 08:59:56,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.04 08:59:56" (3/3) ... [2022-04-08 08:59:56,962 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c11.c [2022-04-08 08:59:56,967 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-08 08:59:56,968 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-08 08:59:56,993 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-08 08:59:56,999 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 [2022-04-08 08:59:57,000 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-08 08:59:57,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 08:59:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-08 08:59:57,015 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 08:59:57,015 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 08:59:57,016 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 08:59:57,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 08:59:57,029 INFO L85 PathProgramCache]: Analyzing trace with hash 536722933, now seen corresponding path program 1 times [2022-04-08 08:59:57,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 08:59:57,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1175906155] [2022-04-08 08:59:57,041 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-08 08:59:57,041 INFO L85 PathProgramCache]: Analyzing trace with hash 536722933, now seen corresponding path program 2 times [2022-04-08 08:59:57,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 08:59:57,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34932907] [2022-04-08 08:59:57,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 08:59:57,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 08:59:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 08:59:57,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-08 08:59:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 08:59:57,214 INFO L290 TraceCheckUtils]: 0: Hoare triple {29#(and (= |#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(8, 2);call #Ultimate.allocInit(12, 3); {24#true} is VALID [2022-04-08 08:59:57,215 INFO L290 TraceCheckUtils]: 1: Hoare triple {24#true} assume true; {24#true} is VALID [2022-04-08 08:59:57,215 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {24#true} {24#true} #44#return; {24#true} is VALID [2022-04-08 08:59:57,217 INFO L272 TraceCheckUtils]: 0: Hoare triple {24#true} call ULTIMATE.init(); {29#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-08 08:59:57,217 INFO L290 TraceCheckUtils]: 1: Hoare triple {29#(and (= |#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(8, 2);call #Ultimate.allocInit(12, 3); {24#true} is VALID [2022-04-08 08:59:57,218 INFO L290 TraceCheckUtils]: 2: Hoare triple {24#true} assume true; {24#true} is VALID [2022-04-08 08:59:57,218 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {24#true} {24#true} #44#return; {24#true} is VALID [2022-04-08 08:59:57,218 INFO L272 TraceCheckUtils]: 4: Hoare triple {24#true} call #t~ret6 := main(); {24#true} is VALID [2022-04-08 08:59:57,218 INFO L290 TraceCheckUtils]: 5: Hoare triple {24#true} havoc ~a~0;~len~0 := 0;havoc ~i~0; {24#true} is VALID [2022-04-08 08:59:57,219 INFO L290 TraceCheckUtils]: 6: Hoare triple {24#true} assume !true; {25#false} is VALID [2022-04-08 08:59:57,219 INFO L272 TraceCheckUtils]: 7: Hoare triple {25#false} call __VERIFIER_assert((if ~len~0 % 4294967296 >= 0 && ~len~0 % 4294967296 < 5 then 1 else 0)); {25#false} is VALID [2022-04-08 08:59:57,219 INFO L290 TraceCheckUtils]: 8: Hoare triple {25#false} ~cond := #in~cond; {25#false} is VALID [2022-04-08 08:59:57,219 INFO L290 TraceCheckUtils]: 9: Hoare triple {25#false} assume 0 == ~cond; {25#false} is VALID [2022-04-08 08:59:57,219 INFO L290 TraceCheckUtils]: 10: Hoare triple {25#false} assume !false; {25#false} is VALID [2022-04-08 08:59:57,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 08:59:57,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 08:59:57,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34932907] [2022-04-08 08:59:57,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34932907] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 08:59:57,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 08:59:57,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-08 08:59:57,225 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 08:59:57,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1175906155] [2022-04-08 08:59:57,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1175906155] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 08:59:57,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 08:59:57,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-08 08:59:57,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120992130] [2022-04-08 08:59:57,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 08:59:57,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-04-08 08:59:57,231 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 08:59:57,232 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-04-08 08:59:57,246 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 08:59:57,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-08 08:59:57,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 08:59:57,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-08 08:59:57,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-08 08:59:57,270 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-04-08 08:59:57,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 08:59:57,344 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-04-08 08:59:57,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-08 08:59:57,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-04-08 08:59:57,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 08:59:57,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-04-08 08:59:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2022-04-08 08:59:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-04-08 08:59:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2022-04-08 08:59:57,356 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 37 transitions. [2022-04-08 08:59:57,401 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 37 edges. 37 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 08:59:57,410 INFO L225 Difference]: With dead ends: 33 [2022-04-08 08:59:57,410 INFO L226 Difference]: Without dead ends: 14 [2022-04-08 08:59:57,413 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 [2022-04-08 08:59:57,416 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-08 08:59:57,418 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-08 08:59:57,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-08 08:59:57,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-08 08:59:57,447 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 08:59:57,448 INFO L82 GeneralOperation]: Start isEquivalent. First operand 14 states. Second operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-04-08 08:59:57,449 INFO L74 IsIncluded]: Start isIncluded. First operand 14 states. Second operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-04-08 08:59:57,449 INFO L87 Difference]: Start difference. First operand 14 states. Second operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-04-08 08:59:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 08:59:57,454 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2022-04-08 08:59:57,454 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-04-08 08:59:57,454 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 08:59:57,454 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 08:59:57,455 INFO L74 IsIncluded]: Start isIncluded. First operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) Second operand 14 states. [2022-04-08 08:59:57,455 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) Second operand 14 states. [2022-04-08 08:59:57,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 08:59:57,458 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2022-04-08 08:59:57,458 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-04-08 08:59:57,459 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 08:59:57,459 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 08:59:57,459 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 08:59:57,459 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 08:59:57,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-04-08 08:59:57,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-04-08 08:59:57,461 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-04-08 08:59:57,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 08:59:57,461 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-04-08 08:59:57,461 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-04-08 08:59:57,462 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 14 states and 15 transitions. [2022-04-08 08:59:57,480 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 15 edges. 15 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 08:59:57,480 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-04-08 08:59:57,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-08 08:59:57,481 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 08:59:57,482 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 08:59:57,484 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-08 08:59:57,485 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 08:59:57,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 08:59:57,492 INFO L85 PathProgramCache]: Analyzing trace with hash 526564202, now seen corresponding path program 1 times [2022-04-08 08:59:57,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 08:59:57,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [600017213] [2022-04-08 08:59:57,493 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-08 08:59:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash 526564202, now seen corresponding path program 2 times [2022-04-08 08:59:57,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 08:59:57,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430846075] [2022-04-08 08:59:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 08:59:57,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 08:59:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 08:59:57,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-08 08:59:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 08:59:57,566 INFO L290 TraceCheckUtils]: 0: Hoare triple {162#(and (= |#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(8, 2);call #Ultimate.allocInit(12, 3); {154#true} is VALID [2022-04-08 08:59:57,566 INFO L290 TraceCheckUtils]: 1: Hoare triple {154#true} assume true; {154#true} is VALID [2022-04-08 08:59:57,566 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {154#true} {154#true} #44#return; {154#true} is VALID [2022-04-08 08:59:57,567 INFO L272 TraceCheckUtils]: 0: Hoare triple {154#true} call ULTIMATE.init(); {162#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-08 08:59:57,567 INFO L290 TraceCheckUtils]: 1: Hoare triple {162#(and (= |#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(8, 2);call #Ultimate.allocInit(12, 3); {154#true} is VALID [2022-04-08 08:59:57,567 INFO L290 TraceCheckUtils]: 2: Hoare triple {154#true} assume true; {154#true} is VALID [2022-04-08 08:59:57,567 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {154#true} {154#true} #44#return; {154#true} is VALID [2022-04-08 08:59:57,567 INFO L272 TraceCheckUtils]: 4: Hoare triple {154#true} call #t~ret6 := main(); {154#true} is VALID [2022-04-08 08:59:57,568 INFO L290 TraceCheckUtils]: 5: Hoare triple {154#true} havoc ~a~0;~len~0 := 0;havoc ~i~0; {159#(= main_~len~0 0)} is VALID [2022-04-08 08:59:57,568 INFO L290 TraceCheckUtils]: 6: Hoare triple {159#(= main_~len~0 0)} assume !(0 != #t~nondet4 % 256);havoc #t~nondet4; {159#(= main_~len~0 0)} is VALID [2022-04-08 08:59:57,569 INFO L272 TraceCheckUtils]: 7: Hoare triple {159#(= main_~len~0 0)} call __VERIFIER_assert((if ~len~0 % 4294967296 >= 0 && ~len~0 % 4294967296 < 5 then 1 else 0)); {160#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 08:59:57,570 INFO L290 TraceCheckUtils]: 8: Hoare triple {160#(not (= |__VERIFIER_assert_#in~cond| 0))} ~cond := #in~cond; {161#(not (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-08 08:59:57,570 INFO L290 TraceCheckUtils]: 9: Hoare triple {161#(not (= __VERIFIER_assert_~cond 0))} assume 0 == ~cond; {155#false} is VALID [2022-04-08 08:59:57,570 INFO L290 TraceCheckUtils]: 10: Hoare triple {155#false} assume !false; {155#false} is VALID [2022-04-08 08:59:57,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 08:59:57,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 08:59:57,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430846075] [2022-04-08 08:59:57,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430846075] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 08:59:57,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 08:59:57,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-08 08:59:57,571 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 08:59:57,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [600017213] [2022-04-08 08:59:57,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [600017213] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 08:59:57,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 08:59:57,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-08 08:59:57,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821719458] [2022-04-08 08:59:57,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 08:59:57,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2022-04-08 08:59:57,573 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 08:59:57,573 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-04-08 08:59:57,581 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 08:59:57,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-08 08:59:57,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 08:59:57,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-08 08:59:57,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-08 08:59:57,582 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-04-08 08:59:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 08:59:57,681 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-04-08 08:59:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-08 08:59:57,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2022-04-08 08:59:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 08:59:57,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-04-08 08:59:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 32 transitions. [2022-04-08 08:59:57,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-04-08 08:59:57,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 32 transitions. [2022-04-08 08:59:57,684 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 32 transitions. [2022-04-08 08:59:57,710 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 32 edges. 32 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 08:59:57,711 INFO L225 Difference]: With dead ends: 28 [2022-04-08 08:59:57,711 INFO L226 Difference]: Without dead ends: 17 [2022-04-08 08:59:57,712 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-08 08:59:57,713 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-08 08:59:57,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 29 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-08 08:59:57,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-08 08:59:57,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-04-08 08:59:57,716 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 08:59:57,716 INFO L82 GeneralOperation]: Start isEquivalent. First operand 17 states. Second operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2022-04-08 08:59:57,717 INFO L74 IsIncluded]: Start isIncluded. First operand 17 states. Second operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2022-04-08 08:59:57,717 INFO L87 Difference]: Start difference. First operand 17 states. Second operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2022-04-08 08:59:57,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 08:59:57,718 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-04-08 08:59:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-04-08 08:59:57,718 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 08:59:57,718 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 08:59:57,719 INFO L74 IsIncluded]: Start isIncluded. First operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) Second operand 17 states. [2022-04-08 08:59:57,719 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) Second operand 17 states. [2022-04-08 08:59:57,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 08:59:57,720 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-04-08 08:59:57,720 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-04-08 08:59:57,720 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 08:59:57,720 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 08:59:57,720 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 08:59:57,720 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 08:59:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2022-04-08 08:59:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-04-08 08:59:57,721 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-04-08 08:59:57,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 08:59:57,721 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-04-08 08:59:57,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-04-08 08:59:57,722 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 16 states and 17 transitions. [2022-04-08 08:59:57,735 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 17 edges. 17 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 08:59:57,736 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-04-08 08:59:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-08 08:59:57,736 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 08:59:57,736 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 08:59:57,736 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-08 08:59:57,736 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 08:59:57,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 08:59:57,737 INFO L85 PathProgramCache]: Analyzing trace with hash -234031063, now seen corresponding path program 1 times [2022-04-08 08:59:57,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 08:59:57,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1891788978] [2022-04-08 08:59:57,741 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-08 08:59:57,741 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 08:59:57,742 INFO L85 PathProgramCache]: Analyzing trace with hash -234031063, now seen corresponding path program 2 times [2022-04-08 08:59:57,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 08:59:57,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303937984] [2022-04-08 08:59:57,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 08:59:57,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 08:59:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 08:59:57,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-08 08:59:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 08:59:57,821 INFO L290 TraceCheckUtils]: 0: Hoare triple {302#(and (= |#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(8, 2);call #Ultimate.allocInit(12, 3); {293#true} is VALID [2022-04-08 08:59:57,821 INFO L290 TraceCheckUtils]: 1: Hoare triple {293#true} assume true; {293#true} is VALID [2022-04-08 08:59:57,821 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {293#true} {293#true} #44#return; {293#true} is VALID [2022-04-08 08:59:57,822 INFO L272 TraceCheckUtils]: 0: Hoare triple {293#true} call ULTIMATE.init(); {302#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-08 08:59:57,822 INFO L290 TraceCheckUtils]: 1: Hoare triple {302#(and (= |#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(8, 2);call #Ultimate.allocInit(12, 3); {293#true} is VALID [2022-04-08 08:59:57,822 INFO L290 TraceCheckUtils]: 2: Hoare triple {293#true} assume true; {293#true} is VALID [2022-04-08 08:59:57,822 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {293#true} {293#true} #44#return; {293#true} is VALID [2022-04-08 08:59:57,822 INFO L272 TraceCheckUtils]: 4: Hoare triple {293#true} call #t~ret6 := main(); {293#true} is VALID [2022-04-08 08:59:57,823 INFO L290 TraceCheckUtils]: 5: Hoare triple {293#true} havoc ~a~0;~len~0 := 0;havoc ~i~0; {298#(= main_~len~0 0)} is VALID [2022-04-08 08:59:57,823 INFO L290 TraceCheckUtils]: 6: Hoare triple {298#(= main_~len~0 0)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {298#(= main_~len~0 0)} is VALID [2022-04-08 08:59:57,824 INFO L290 TraceCheckUtils]: 7: Hoare triple {298#(= main_~len~0 0)} assume !(4 == ~len~0 % 4294967296); {298#(= main_~len~0 0)} is VALID [2022-04-08 08:59:57,824 INFO L290 TraceCheckUtils]: 8: Hoare triple {298#(= main_~len~0 0)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {299#(and (<= main_~len~0 1) (not (<= (+ (div main_~len~0 4294967296) 1) 0)))} is VALID [2022-04-08 08:59:57,825 INFO L290 TraceCheckUtils]: 9: Hoare triple {299#(and (<= main_~len~0 1) (not (<= (+ (div main_~len~0 4294967296) 1) 0)))} assume !(0 != #t~nondet4 % 256);havoc #t~nondet4; {299#(and (<= main_~len~0 1) (not (<= (+ (div main_~len~0 4294967296) 1) 0)))} is VALID [2022-04-08 08:59:57,826 INFO L272 TraceCheckUtils]: 10: Hoare triple {299#(and (<= main_~len~0 1) (not (<= (+ (div main_~len~0 4294967296) 1) 0)))} call __VERIFIER_assert((if ~len~0 % 4294967296 >= 0 && ~len~0 % 4294967296 < 5 then 1 else 0)); {300#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 08:59:57,826 INFO L290 TraceCheckUtils]: 11: Hoare triple {300#(not (= |__VERIFIER_assert_#in~cond| 0))} ~cond := #in~cond; {301#(not (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-08 08:59:57,826 INFO L290 TraceCheckUtils]: 12: Hoare triple {301#(not (= __VERIFIER_assert_~cond 0))} assume 0 == ~cond; {294#false} is VALID [2022-04-08 08:59:57,827 INFO L290 TraceCheckUtils]: 13: Hoare triple {294#false} assume !false; {294#false} is VALID [2022-04-08 08:59:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 08:59:57,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 08:59:57,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303937984] [2022-04-08 08:59:57,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303937984] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-08 08:59:57,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718212004] [2022-04-08 08:59:57,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-08 08:59:57,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 08:59:57,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 08:59:57,829 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) [2022-04-08 08:59:57,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-08 08:59:57,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-08 08:59:57,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 08:59:57,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-08 08:59:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 08:59:57,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 08:59:57,956 INFO L272 TraceCheckUtils]: 0: Hoare triple {293#true} call ULTIMATE.init(); {293#true} is VALID [2022-04-08 08:59:57,956 INFO L290 TraceCheckUtils]: 1: Hoare triple {293#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(8, 2);call #Ultimate.allocInit(12, 3); {293#true} is VALID [2022-04-08 08:59:57,956 INFO L290 TraceCheckUtils]: 2: Hoare triple {293#true} assume true; {293#true} is VALID [2022-04-08 08:59:57,957 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {293#true} {293#true} #44#return; {293#true} is VALID [2022-04-08 08:59:57,957 INFO L272 TraceCheckUtils]: 4: Hoare triple {293#true} call #t~ret6 := main(); {293#true} is VALID [2022-04-08 08:59:57,957 INFO L290 TraceCheckUtils]: 5: Hoare triple {293#true} havoc ~a~0;~len~0 := 0;havoc ~i~0; {298#(= main_~len~0 0)} is VALID [2022-04-08 08:59:57,958 INFO L290 TraceCheckUtils]: 6: Hoare triple {298#(= main_~len~0 0)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {298#(= main_~len~0 0)} is VALID [2022-04-08 08:59:57,958 INFO L290 TraceCheckUtils]: 7: Hoare triple {298#(= main_~len~0 0)} assume !(4 == ~len~0 % 4294967296); {298#(= main_~len~0 0)} is VALID [2022-04-08 08:59:57,959 INFO L290 TraceCheckUtils]: 8: Hoare triple {298#(= main_~len~0 0)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {330#(= main_~len~0 1)} is VALID [2022-04-08 08:59:57,959 INFO L290 TraceCheckUtils]: 9: Hoare triple {330#(= main_~len~0 1)} assume !(0 != #t~nondet4 % 256);havoc #t~nondet4; {330#(= main_~len~0 1)} is VALID [2022-04-08 08:59:57,960 INFO L272 TraceCheckUtils]: 10: Hoare triple {330#(= main_~len~0 1)} call __VERIFIER_assert((if ~len~0 % 4294967296 >= 0 && ~len~0 % 4294967296 < 5 then 1 else 0)); {337#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 08:59:57,960 INFO L290 TraceCheckUtils]: 11: Hoare triple {337#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {341#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 08:59:57,961 INFO L290 TraceCheckUtils]: 12: Hoare triple {341#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {294#false} is VALID [2022-04-08 08:59:57,961 INFO L290 TraceCheckUtils]: 13: Hoare triple {294#false} assume !false; {294#false} is VALID [2022-04-08 08:59:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 08:59:57,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-08 08:59:58,110 INFO L290 TraceCheckUtils]: 13: Hoare triple {294#false} assume !false; {294#false} is VALID [2022-04-08 08:59:58,111 INFO L290 TraceCheckUtils]: 12: Hoare triple {341#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {294#false} is VALID [2022-04-08 08:59:58,112 INFO L290 TraceCheckUtils]: 11: Hoare triple {337#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {341#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 08:59:58,112 INFO L272 TraceCheckUtils]: 10: Hoare triple {357#(< (mod main_~len~0 4294967296) 5)} call __VERIFIER_assert((if ~len~0 % 4294967296 >= 0 && ~len~0 % 4294967296 < 5 then 1 else 0)); {337#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 08:59:58,113 INFO L290 TraceCheckUtils]: 9: Hoare triple {357#(< (mod main_~len~0 4294967296) 5)} assume !(0 != #t~nondet4 % 256);havoc #t~nondet4; {357#(< (mod main_~len~0 4294967296) 5)} is VALID [2022-04-08 08:59:58,114 INFO L290 TraceCheckUtils]: 8: Hoare triple {364#(< (mod (+ main_~len~0 1) 4294967296) 5)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {357#(< (mod main_~len~0 4294967296) 5)} is VALID [2022-04-08 08:59:58,114 INFO L290 TraceCheckUtils]: 7: Hoare triple {364#(< (mod (+ main_~len~0 1) 4294967296) 5)} assume !(4 == ~len~0 % 4294967296); {364#(< (mod (+ main_~len~0 1) 4294967296) 5)} is VALID [2022-04-08 08:59:58,114 INFO L290 TraceCheckUtils]: 6: Hoare triple {364#(< (mod (+ main_~len~0 1) 4294967296) 5)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {364#(< (mod (+ main_~len~0 1) 4294967296) 5)} is VALID [2022-04-08 08:59:58,115 INFO L290 TraceCheckUtils]: 5: Hoare triple {293#true} havoc ~a~0;~len~0 := 0;havoc ~i~0; {364#(< (mod (+ main_~len~0 1) 4294967296) 5)} is VALID [2022-04-08 08:59:58,115 INFO L272 TraceCheckUtils]: 4: Hoare triple {293#true} call #t~ret6 := main(); {293#true} is VALID [2022-04-08 08:59:58,115 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {293#true} {293#true} #44#return; {293#true} is VALID [2022-04-08 08:59:58,115 INFO L290 TraceCheckUtils]: 2: Hoare triple {293#true} assume true; {293#true} is VALID [2022-04-08 08:59:58,115 INFO L290 TraceCheckUtils]: 1: Hoare triple {293#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(8, 2);call #Ultimate.allocInit(12, 3); {293#true} is VALID [2022-04-08 08:59:58,116 INFO L272 TraceCheckUtils]: 0: Hoare triple {293#true} call ULTIMATE.init(); {293#true} is VALID [2022-04-08 08:59:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 08:59:58,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718212004] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-08 08:59:58,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-08 08:59:58,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-08 08:59:58,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 08:59:58,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1891788978] [2022-04-08 08:59:58,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1891788978] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 08:59:58,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 08:59:58,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-08 08:59:58,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791085098] [2022-04-08 08:59:58,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 08:59:58,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 5 states have internal predecessors, (10), 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 14 [2022-04-08 08:59:58,118 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 08:59:58,118 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-04-08 08:59:58,132 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 14 edges. 14 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 08:59:58,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-08 08:59:58,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 08:59:58,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-08 08:59:58,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-04-08 08:59:58,133 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-04-08 08:59:58,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 08:59:58,289 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-04-08 08:59:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-08 08:59:58,290 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 5 states have internal predecessors, (10), 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 14 [2022-04-08 08:59:58,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 08:59:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-04-08 08:59:58,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 35 transitions. [2022-04-08 08:59:58,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-04-08 08:59:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 35 transitions. [2022-04-08 08:59:58,293 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 7 states and 35 transitions. [2022-04-08 08:59:58,324 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 35 edges. 35 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 08:59:58,324 INFO L225 Difference]: With dead ends: 31 [2022-04-08 08:59:58,324 INFO L226 Difference]: Without dead ends: 20 [2022-04-08 08:59:58,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-04-08 08:59:58,326 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-08 08:59:58,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 34 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-08 08:59:58,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-08 08:59:58,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-04-08 08:59:58,332 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 08:59:58,333 INFO L82 GeneralOperation]: Start isEquivalent. First operand 20 states. Second operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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) [2022-04-08 08:59:58,333 INFO L74 IsIncluded]: Start isIncluded. First operand 20 states. Second operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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) [2022-04-08 08:59:58,333 INFO L87 Difference]: Start difference. First operand 20 states. Second operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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) [2022-04-08 08:59:58,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 08:59:58,334 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-04-08 08:59:58,334 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-04-08 08:59:58,334 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 08:59:58,334 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 08:59:58,335 INFO L74 IsIncluded]: Start isIncluded. First operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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) Second operand 20 states. [2022-04-08 08:59:58,335 INFO L87 Difference]: Start difference. First operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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) Second operand 20 states. [2022-04-08 08:59:58,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 08:59:58,336 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-04-08 08:59:58,336 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-04-08 08:59:58,336 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 08:59:58,336 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 08:59:58,336 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 08:59:58,336 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 08:59:58,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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) [2022-04-08 08:59:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-04-08 08:59:58,337 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2022-04-08 08:59:58,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 08:59:58,337 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-04-08 08:59:58,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 5 states have internal predecessors, (10), 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) [2022-04-08 08:59:58,337 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 19 states and 20 transitions. [2022-04-08 08:59:58,353 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 20 edges. 20 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 08:59:58,354 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-04-08 08:59:58,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-08 08:59:58,354 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 08:59:58,354 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 08:59:58,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-08 08:59:58,570 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 [2022-04-08 08:59:58,571 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 08:59:58,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 08:59:58,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1119883018, now seen corresponding path program 3 times [2022-04-08 08:59:58,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 08:59:58,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1114704876] [2022-04-08 08:59:58,572 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-08 08:59:58,573 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 08:59:58,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1119883018, now seen corresponding path program 4 times [2022-04-08 08:59:58,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 08:59:58,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28181535] [2022-04-08 08:59:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 08:59:58,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 08:59:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 08:59:58,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-08 08:59:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 08:59:58,660 INFO L290 TraceCheckUtils]: 0: Hoare triple {549#(and (= |#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(8, 2);call #Ultimate.allocInit(12, 3); {539#true} is VALID [2022-04-08 08:59:58,661 INFO L290 TraceCheckUtils]: 1: Hoare triple {539#true} assume true; {539#true} is VALID [2022-04-08 08:59:58,661 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {539#true} {539#true} #44#return; {539#true} is VALID [2022-04-08 08:59:58,661 INFO L272 TraceCheckUtils]: 0: Hoare triple {539#true} call ULTIMATE.init(); {549#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-08 08:59:58,662 INFO L290 TraceCheckUtils]: 1: Hoare triple {549#(and (= |#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(8, 2);call #Ultimate.allocInit(12, 3); {539#true} is VALID [2022-04-08 08:59:58,662 INFO L290 TraceCheckUtils]: 2: Hoare triple {539#true} assume true; {539#true} is VALID [2022-04-08 08:59:58,662 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {539#true} {539#true} #44#return; {539#true} is VALID [2022-04-08 08:59:58,662 INFO L272 TraceCheckUtils]: 4: Hoare triple {539#true} call #t~ret6 := main(); {539#true} is VALID [2022-04-08 08:59:58,662 INFO L290 TraceCheckUtils]: 5: Hoare triple {539#true} havoc ~a~0;~len~0 := 0;havoc ~i~0; {544#(= main_~len~0 0)} is VALID [2022-04-08 08:59:58,663 INFO L290 TraceCheckUtils]: 6: Hoare triple {544#(= main_~len~0 0)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {544#(= main_~len~0 0)} is VALID [2022-04-08 08:59:58,663 INFO L290 TraceCheckUtils]: 7: Hoare triple {544#(= main_~len~0 0)} assume !(4 == ~len~0 % 4294967296); {544#(= main_~len~0 0)} is VALID [2022-04-08 08:59:58,664 INFO L290 TraceCheckUtils]: 8: Hoare triple {544#(= main_~len~0 0)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {545#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 08:59:58,664 INFO L290 TraceCheckUtils]: 9: Hoare triple {545#(and (<= 1 main_~len~0) (<= main_~len~0 1))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {545#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 08:59:58,664 INFO L290 TraceCheckUtils]: 10: Hoare triple {545#(and (<= 1 main_~len~0) (<= main_~len~0 1))} assume !(4 == ~len~0 % 4294967296); {545#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 08:59:58,665 INFO L290 TraceCheckUtils]: 11: Hoare triple {545#(and (<= 1 main_~len~0) (<= main_~len~0 1))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {546#(and (<= main_~len~0 2) (not (<= (+ (div main_~len~0 4294967296) 1) 0)))} is VALID [2022-04-08 08:59:58,666 INFO L290 TraceCheckUtils]: 12: Hoare triple {546#(and (<= main_~len~0 2) (not (<= (+ (div main_~len~0 4294967296) 1) 0)))} assume !(0 != #t~nondet4 % 256);havoc #t~nondet4; {546#(and (<= main_~len~0 2) (not (<= (+ (div main_~len~0 4294967296) 1) 0)))} is VALID [2022-04-08 08:59:58,666 INFO L272 TraceCheckUtils]: 13: Hoare triple {546#(and (<= main_~len~0 2) (not (<= (+ (div main_~len~0 4294967296) 1) 0)))} call __VERIFIER_assert((if ~len~0 % 4294967296 >= 0 && ~len~0 % 4294967296 < 5 then 1 else 0)); {547#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 08:59:58,667 INFO L290 TraceCheckUtils]: 14: Hoare triple {547#(not (= |__VERIFIER_assert_#in~cond| 0))} ~cond := #in~cond; {548#(not (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-08 08:59:58,667 INFO L290 TraceCheckUtils]: 15: Hoare triple {548#(not (= __VERIFIER_assert_~cond 0))} assume 0 == ~cond; {540#false} is VALID [2022-04-08 08:59:58,667 INFO L290 TraceCheckUtils]: 16: Hoare triple {540#false} assume !false; {540#false} is VALID [2022-04-08 08:59:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 08:59:58,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 08:59:58,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28181535] [2022-04-08 08:59:58,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28181535] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-08 08:59:58,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949556984] [2022-04-08 08:59:58,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-08 08:59:58,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 08:59:58,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 08:59:58,669 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) [2022-04-08 08:59:58,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-08 08:59:58,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-08 08:59:58,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 08:59:58,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-08 08:59:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 08:59:58,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 08:59:58,896 INFO L272 TraceCheckUtils]: 0: Hoare triple {539#true} call ULTIMATE.init(); {539#true} is VALID [2022-04-08 08:59:58,896 INFO L290 TraceCheckUtils]: 1: Hoare triple {539#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(8, 2);call #Ultimate.allocInit(12, 3); {539#true} is VALID [2022-04-08 08:59:58,896 INFO L290 TraceCheckUtils]: 2: Hoare triple {539#true} assume true; {539#true} is VALID [2022-04-08 08:59:58,896 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {539#true} {539#true} #44#return; {539#true} is VALID [2022-04-08 08:59:58,897 INFO L272 TraceCheckUtils]: 4: Hoare triple {539#true} call #t~ret6 := main(); {539#true} is VALID [2022-04-08 08:59:58,897 INFO L290 TraceCheckUtils]: 5: Hoare triple {539#true} havoc ~a~0;~len~0 := 0;havoc ~i~0; {544#(= main_~len~0 0)} is VALID [2022-04-08 08:59:58,897 INFO L290 TraceCheckUtils]: 6: Hoare triple {544#(= main_~len~0 0)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {544#(= main_~len~0 0)} is VALID [2022-04-08 08:59:58,898 INFO L290 TraceCheckUtils]: 7: Hoare triple {544#(= main_~len~0 0)} assume !(4 == ~len~0 % 4294967296); {544#(= main_~len~0 0)} is VALID [2022-04-08 08:59:58,898 INFO L290 TraceCheckUtils]: 8: Hoare triple {544#(= main_~len~0 0)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {545#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 08:59:58,899 INFO L290 TraceCheckUtils]: 9: Hoare triple {545#(and (<= 1 main_~len~0) (<= main_~len~0 1))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {545#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 08:59:58,899 INFO L290 TraceCheckUtils]: 10: Hoare triple {545#(and (<= 1 main_~len~0) (<= main_~len~0 1))} assume !(4 == ~len~0 % 4294967296); {545#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 08:59:58,900 INFO L290 TraceCheckUtils]: 11: Hoare triple {545#(and (<= 1 main_~len~0) (<= main_~len~0 1))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {586#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 08:59:58,900 INFO L290 TraceCheckUtils]: 12: Hoare triple {586#(and (<= main_~len~0 2) (<= 2 main_~len~0))} assume !(0 != #t~nondet4 % 256);havoc #t~nondet4; {586#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 08:59:58,901 INFO L272 TraceCheckUtils]: 13: Hoare triple {586#(and (<= main_~len~0 2) (<= 2 main_~len~0))} call __VERIFIER_assert((if ~len~0 % 4294967296 >= 0 && ~len~0 % 4294967296 < 5 then 1 else 0)); {593#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 08:59:58,902 INFO L290 TraceCheckUtils]: 14: Hoare triple {593#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {597#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 08:59:58,902 INFO L290 TraceCheckUtils]: 15: Hoare triple {597#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {540#false} is VALID [2022-04-08 08:59:58,902 INFO L290 TraceCheckUtils]: 16: Hoare triple {540#false} assume !false; {540#false} is VALID [2022-04-08 08:59:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 08:59:58,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-08 08:59:59,028 INFO L290 TraceCheckUtils]: 16: Hoare triple {540#false} assume !false; {540#false} is VALID [2022-04-08 08:59:59,029 INFO L290 TraceCheckUtils]: 15: Hoare triple {597#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {540#false} is VALID [2022-04-08 08:59:59,029 INFO L290 TraceCheckUtils]: 14: Hoare triple {593#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {597#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 08:59:59,030 INFO L272 TraceCheckUtils]: 13: Hoare triple {613#(< (mod main_~len~0 4294967296) 5)} call __VERIFIER_assert((if ~len~0 % 4294967296 >= 0 && ~len~0 % 4294967296 < 5 then 1 else 0)); {593#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 08:59:59,030 INFO L290 TraceCheckUtils]: 12: Hoare triple {613#(< (mod main_~len~0 4294967296) 5)} assume !(0 != #t~nondet4 % 256);havoc #t~nondet4; {613#(< (mod main_~len~0 4294967296) 5)} is VALID [2022-04-08 08:59:59,031 INFO L290 TraceCheckUtils]: 11: Hoare triple {620#(< (mod (+ main_~len~0 1) 4294967296) 5)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {613#(< (mod main_~len~0 4294967296) 5)} is VALID [2022-04-08 08:59:59,032 INFO L290 TraceCheckUtils]: 10: Hoare triple {620#(< (mod (+ main_~len~0 1) 4294967296) 5)} assume !(4 == ~len~0 % 4294967296); {620#(< (mod (+ main_~len~0 1) 4294967296) 5)} is VALID [2022-04-08 08:59:59,032 INFO L290 TraceCheckUtils]: 9: Hoare triple {620#(< (mod (+ main_~len~0 1) 4294967296) 5)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {620#(< (mod (+ main_~len~0 1) 4294967296) 5)} is VALID [2022-04-08 08:59:59,033 INFO L290 TraceCheckUtils]: 8: Hoare triple {630#(< (mod (+ main_~len~0 2) 4294967296) 5)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {620#(< (mod (+ main_~len~0 1) 4294967296) 5)} is VALID [2022-04-08 08:59:59,033 INFO L290 TraceCheckUtils]: 7: Hoare triple {630#(< (mod (+ main_~len~0 2) 4294967296) 5)} assume !(4 == ~len~0 % 4294967296); {630#(< (mod (+ main_~len~0 2) 4294967296) 5)} is VALID [2022-04-08 08:59:59,034 INFO L290 TraceCheckUtils]: 6: Hoare triple {630#(< (mod (+ main_~len~0 2) 4294967296) 5)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {630#(< (mod (+ main_~len~0 2) 4294967296) 5)} is VALID [2022-04-08 08:59:59,034 INFO L290 TraceCheckUtils]: 5: Hoare triple {539#true} havoc ~a~0;~len~0 := 0;havoc ~i~0; {630#(< (mod (+ main_~len~0 2) 4294967296) 5)} is VALID [2022-04-08 08:59:59,034 INFO L272 TraceCheckUtils]: 4: Hoare triple {539#true} call #t~ret6 := main(); {539#true} is VALID [2022-04-08 08:59:59,034 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {539#true} {539#true} #44#return; {539#true} is VALID [2022-04-08 08:59:59,034 INFO L290 TraceCheckUtils]: 2: Hoare triple {539#true} assume true; {539#true} is VALID [2022-04-08 08:59:59,035 INFO L290 TraceCheckUtils]: 1: Hoare triple {539#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(8, 2);call #Ultimate.allocInit(12, 3); {539#true} is VALID [2022-04-08 08:59:59,035 INFO L272 TraceCheckUtils]: 0: Hoare triple {539#true} call ULTIMATE.init(); {539#true} is VALID [2022-04-08 08:59:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 08:59:59,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949556984] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-08 08:59:59,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-08 08:59:59,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-08 08:59:59,036 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 08:59:59,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1114704876] [2022-04-08 08:59:59,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1114704876] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 08:59:59,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 08:59:59,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-08 08:59:59,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717747658] [2022-04-08 08:59:59,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 08:59:59,036 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 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 17 [2022-04-08 08:59:59,036 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 08:59:59,037 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-04-08 08:59:59,049 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 17 edges. 17 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 08:59:59,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-08 08:59:59,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 08:59:59,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-08 08:59:59,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-04-08 08:59:59,050 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-04-08 08:59:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 08:59:59,237 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-04-08 08:59:59,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-08 08:59:59,238 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 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 17 [2022-04-08 08:59:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 08:59:59,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-04-08 08:59:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 38 transitions. [2022-04-08 08:59:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-04-08 08:59:59,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 38 transitions. [2022-04-08 08:59:59,240 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 8 states and 38 transitions. [2022-04-08 08:59:59,272 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 38 edges. 38 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 08:59:59,273 INFO L225 Difference]: With dead ends: 37 [2022-04-08 08:59:59,273 INFO L226 Difference]: Without dead ends: 23 [2022-04-08 08:59:59,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-04-08 08:59:59,274 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-08 08:59:59,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-08 08:59:59,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-08 08:59:59,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-04-08 08:59:59,286 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 08:59:59,286 INFO L82 GeneralOperation]: Start isEquivalent. First operand 23 states. Second operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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) [2022-04-08 08:59:59,286 INFO L74 IsIncluded]: Start isIncluded. First operand 23 states. Second operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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) [2022-04-08 08:59:59,287 INFO L87 Difference]: Start difference. First operand 23 states. Second operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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) [2022-04-08 08:59:59,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 08:59:59,288 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2022-04-08 08:59:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-04-08 08:59:59,288 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 08:59:59,288 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 08:59:59,288 INFO L74 IsIncluded]: Start isIncluded. First operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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) Second operand 23 states. [2022-04-08 08:59:59,289 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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) Second operand 23 states. [2022-04-08 08:59:59,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 08:59:59,290 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2022-04-08 08:59:59,290 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-04-08 08:59:59,290 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 08:59:59,290 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 08:59:59,290 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 08:59:59,290 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 08:59:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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) [2022-04-08 08:59:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-04-08 08:59:59,291 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-04-08 08:59:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 08:59:59,291 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-04-08 08:59:59,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-04-08 08:59:59,291 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 22 states and 23 transitions. [2022-04-08 08:59:59,308 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 23 edges. 23 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 08:59:59,308 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-04-08 08:59:59,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-08 08:59:59,309 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 08:59:59,309 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 08:59:59,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-04-08 08:59:59,522 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 [2022-04-08 08:59:59,522 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 08:59:59,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 08:59:59,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1536393353, now seen corresponding path program 5 times [2022-04-08 08:59:59,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 08:59:59,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [562016389] [2022-04-08 08:59:59,525 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-08 08:59:59,525 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 08:59:59,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1536393353, now seen corresponding path program 6 times [2022-04-08 08:59:59,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 08:59:59,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783022305] [2022-04-08 08:59:59,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 08:59:59,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 08:59:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 08:59:59,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-08 08:59:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 08:59:59,625 INFO L290 TraceCheckUtils]: 0: Hoare triple {842#(and (= |#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(8, 2);call #Ultimate.allocInit(12, 3); {831#true} is VALID [2022-04-08 08:59:59,625 INFO L290 TraceCheckUtils]: 1: Hoare triple {831#true} assume true; {831#true} is VALID [2022-04-08 08:59:59,625 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {831#true} {831#true} #44#return; {831#true} is VALID [2022-04-08 08:59:59,626 INFO L272 TraceCheckUtils]: 0: Hoare triple {831#true} call ULTIMATE.init(); {842#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-08 08:59:59,626 INFO L290 TraceCheckUtils]: 1: Hoare triple {842#(and (= |#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(8, 2);call #Ultimate.allocInit(12, 3); {831#true} is VALID [2022-04-08 08:59:59,626 INFO L290 TraceCheckUtils]: 2: Hoare triple {831#true} assume true; {831#true} is VALID [2022-04-08 08:59:59,626 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {831#true} {831#true} #44#return; {831#true} is VALID [2022-04-08 08:59:59,626 INFO L272 TraceCheckUtils]: 4: Hoare triple {831#true} call #t~ret6 := main(); {831#true} is VALID [2022-04-08 08:59:59,627 INFO L290 TraceCheckUtils]: 5: Hoare triple {831#true} havoc ~a~0;~len~0 := 0;havoc ~i~0; {836#(= main_~len~0 0)} is VALID [2022-04-08 08:59:59,627 INFO L290 TraceCheckUtils]: 6: Hoare triple {836#(= main_~len~0 0)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {836#(= main_~len~0 0)} is VALID [2022-04-08 08:59:59,627 INFO L290 TraceCheckUtils]: 7: Hoare triple {836#(= main_~len~0 0)} assume !(4 == ~len~0 % 4294967296); {836#(= main_~len~0 0)} is VALID [2022-04-08 08:59:59,628 INFO L290 TraceCheckUtils]: 8: Hoare triple {836#(= main_~len~0 0)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {837#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 08:59:59,628 INFO L290 TraceCheckUtils]: 9: Hoare triple {837#(and (<= 1 main_~len~0) (<= main_~len~0 1))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {837#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 08:59:59,629 INFO L290 TraceCheckUtils]: 10: Hoare triple {837#(and (<= 1 main_~len~0) (<= main_~len~0 1))} assume !(4 == ~len~0 % 4294967296); {837#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 08:59:59,629 INFO L290 TraceCheckUtils]: 11: Hoare triple {837#(and (<= 1 main_~len~0) (<= main_~len~0 1))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {838#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 08:59:59,630 INFO L290 TraceCheckUtils]: 12: Hoare triple {838#(and (<= main_~len~0 2) (<= 2 main_~len~0))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {838#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 08:59:59,630 INFO L290 TraceCheckUtils]: 13: Hoare triple {838#(and (<= main_~len~0 2) (<= 2 main_~len~0))} assume !(4 == ~len~0 % 4294967296); {838#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 08:59:59,631 INFO L290 TraceCheckUtils]: 14: Hoare triple {838#(and (<= main_~len~0 2) (<= 2 main_~len~0))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {839#(and (<= main_~len~0 3) (not (<= (+ (div main_~len~0 4294967296) 1) 0)))} is VALID [2022-04-08 08:59:59,631 INFO L290 TraceCheckUtils]: 15: Hoare triple {839#(and (<= main_~len~0 3) (not (<= (+ (div main_~len~0 4294967296) 1) 0)))} assume !(0 != #t~nondet4 % 256);havoc #t~nondet4; {839#(and (<= main_~len~0 3) (not (<= (+ (div main_~len~0 4294967296) 1) 0)))} is VALID [2022-04-08 08:59:59,632 INFO L272 TraceCheckUtils]: 16: Hoare triple {839#(and (<= main_~len~0 3) (not (<= (+ (div main_~len~0 4294967296) 1) 0)))} call __VERIFIER_assert((if ~len~0 % 4294967296 >= 0 && ~len~0 % 4294967296 < 5 then 1 else 0)); {840#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 08:59:59,632 INFO L290 TraceCheckUtils]: 17: Hoare triple {840#(not (= |__VERIFIER_assert_#in~cond| 0))} ~cond := #in~cond; {841#(not (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-08 08:59:59,633 INFO L290 TraceCheckUtils]: 18: Hoare triple {841#(not (= __VERIFIER_assert_~cond 0))} assume 0 == ~cond; {832#false} is VALID [2022-04-08 08:59:59,633 INFO L290 TraceCheckUtils]: 19: Hoare triple {832#false} assume !false; {832#false} is VALID [2022-04-08 08:59:59,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 08:59:59,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 08:59:59,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783022305] [2022-04-08 08:59:59,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783022305] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-08 08:59:59,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539724737] [2022-04-08 08:59:59,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-08 08:59:59,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 08:59:59,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 08:59:59,635 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) [2022-04-08 08:59:59,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-08 08:59:59,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-08 08:59:59,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 08:59:59,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-08 08:59:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 08:59:59,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 08:59:59,943 INFO L272 TraceCheckUtils]: 0: Hoare triple {831#true} call ULTIMATE.init(); {831#true} is VALID [2022-04-08 08:59:59,943 INFO L290 TraceCheckUtils]: 1: Hoare triple {831#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(8, 2);call #Ultimate.allocInit(12, 3); {831#true} is VALID [2022-04-08 08:59:59,944 INFO L290 TraceCheckUtils]: 2: Hoare triple {831#true} assume true; {831#true} is VALID [2022-04-08 08:59:59,944 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {831#true} {831#true} #44#return; {831#true} is VALID [2022-04-08 08:59:59,944 INFO L272 TraceCheckUtils]: 4: Hoare triple {831#true} call #t~ret6 := main(); {831#true} is VALID [2022-04-08 08:59:59,956 INFO L290 TraceCheckUtils]: 5: Hoare triple {831#true} havoc ~a~0;~len~0 := 0;havoc ~i~0; {836#(= main_~len~0 0)} is VALID [2022-04-08 08:59:59,957 INFO L290 TraceCheckUtils]: 6: Hoare triple {836#(= main_~len~0 0)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {836#(= main_~len~0 0)} is VALID [2022-04-08 08:59:59,957 INFO L290 TraceCheckUtils]: 7: Hoare triple {836#(= main_~len~0 0)} assume !(4 == ~len~0 % 4294967296); {836#(= main_~len~0 0)} is VALID [2022-04-08 08:59:59,957 INFO L290 TraceCheckUtils]: 8: Hoare triple {836#(= main_~len~0 0)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {837#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 08:59:59,958 INFO L290 TraceCheckUtils]: 9: Hoare triple {837#(and (<= 1 main_~len~0) (<= main_~len~0 1))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {837#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 08:59:59,958 INFO L290 TraceCheckUtils]: 10: Hoare triple {837#(and (<= 1 main_~len~0) (<= main_~len~0 1))} assume !(4 == ~len~0 % 4294967296); {837#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 08:59:59,959 INFO L290 TraceCheckUtils]: 11: Hoare triple {837#(and (<= 1 main_~len~0) (<= main_~len~0 1))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {838#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 08:59:59,959 INFO L290 TraceCheckUtils]: 12: Hoare triple {838#(and (<= main_~len~0 2) (<= 2 main_~len~0))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {838#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 08:59:59,960 INFO L290 TraceCheckUtils]: 13: Hoare triple {838#(and (<= main_~len~0 2) (<= 2 main_~len~0))} assume !(4 == ~len~0 % 4294967296); {838#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 08:59:59,960 INFO L290 TraceCheckUtils]: 14: Hoare triple {838#(and (<= main_~len~0 2) (<= 2 main_~len~0))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {888#(and (<= 3 main_~len~0) (<= main_~len~0 3))} is VALID [2022-04-08 08:59:59,961 INFO L290 TraceCheckUtils]: 15: Hoare triple {888#(and (<= 3 main_~len~0) (<= main_~len~0 3))} assume !(0 != #t~nondet4 % 256);havoc #t~nondet4; {888#(and (<= 3 main_~len~0) (<= main_~len~0 3))} is VALID [2022-04-08 08:59:59,961 INFO L272 TraceCheckUtils]: 16: Hoare triple {888#(and (<= 3 main_~len~0) (<= main_~len~0 3))} call __VERIFIER_assert((if ~len~0 % 4294967296 >= 0 && ~len~0 % 4294967296 < 5 then 1 else 0)); {895#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 08:59:59,962 INFO L290 TraceCheckUtils]: 17: Hoare triple {895#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {899#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 08:59:59,962 INFO L290 TraceCheckUtils]: 18: Hoare triple {899#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {832#false} is VALID [2022-04-08 08:59:59,962 INFO L290 TraceCheckUtils]: 19: Hoare triple {832#false} assume !false; {832#false} is VALID [2022-04-08 08:59:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 08:59:59,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-08 09:00:00,124 INFO L290 TraceCheckUtils]: 19: Hoare triple {832#false} assume !false; {832#false} is VALID [2022-04-08 09:00:00,131 INFO L290 TraceCheckUtils]: 18: Hoare triple {899#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {832#false} is VALID [2022-04-08 09:00:00,132 INFO L290 TraceCheckUtils]: 17: Hoare triple {895#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {899#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 09:00:00,132 INFO L272 TraceCheckUtils]: 16: Hoare triple {915#(< (mod main_~len~0 4294967296) 5)} call __VERIFIER_assert((if ~len~0 % 4294967296 >= 0 && ~len~0 % 4294967296 < 5 then 1 else 0)); {895#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 09:00:00,132 INFO L290 TraceCheckUtils]: 15: Hoare triple {915#(< (mod main_~len~0 4294967296) 5)} assume !(0 != #t~nondet4 % 256);havoc #t~nondet4; {915#(< (mod main_~len~0 4294967296) 5)} is VALID [2022-04-08 09:00:00,133 INFO L290 TraceCheckUtils]: 14: Hoare triple {922#(< (mod (+ main_~len~0 1) 4294967296) 5)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {915#(< (mod main_~len~0 4294967296) 5)} is VALID [2022-04-08 09:00:00,133 INFO L290 TraceCheckUtils]: 13: Hoare triple {922#(< (mod (+ main_~len~0 1) 4294967296) 5)} assume !(4 == ~len~0 % 4294967296); {922#(< (mod (+ main_~len~0 1) 4294967296) 5)} is VALID [2022-04-08 09:00:00,134 INFO L290 TraceCheckUtils]: 12: Hoare triple {922#(< (mod (+ main_~len~0 1) 4294967296) 5)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {922#(< (mod (+ main_~len~0 1) 4294967296) 5)} is VALID [2022-04-08 09:00:00,135 INFO L290 TraceCheckUtils]: 11: Hoare triple {932#(< (mod (+ main_~len~0 2) 4294967296) 5)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {922#(< (mod (+ main_~len~0 1) 4294967296) 5)} is VALID [2022-04-08 09:00:00,136 INFO L290 TraceCheckUtils]: 10: Hoare triple {932#(< (mod (+ main_~len~0 2) 4294967296) 5)} assume !(4 == ~len~0 % 4294967296); {932#(< (mod (+ main_~len~0 2) 4294967296) 5)} is VALID [2022-04-08 09:00:00,136 INFO L290 TraceCheckUtils]: 9: Hoare triple {932#(< (mod (+ main_~len~0 2) 4294967296) 5)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {932#(< (mod (+ main_~len~0 2) 4294967296) 5)} is VALID [2022-04-08 09:00:00,137 INFO L290 TraceCheckUtils]: 8: Hoare triple {942#(< (mod (+ main_~len~0 3) 4294967296) 5)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {932#(< (mod (+ main_~len~0 2) 4294967296) 5)} is VALID [2022-04-08 09:00:00,137 INFO L290 TraceCheckUtils]: 7: Hoare triple {942#(< (mod (+ main_~len~0 3) 4294967296) 5)} assume !(4 == ~len~0 % 4294967296); {942#(< (mod (+ main_~len~0 3) 4294967296) 5)} is VALID [2022-04-08 09:00:00,137 INFO L290 TraceCheckUtils]: 6: Hoare triple {942#(< (mod (+ main_~len~0 3) 4294967296) 5)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {942#(< (mod (+ main_~len~0 3) 4294967296) 5)} is VALID [2022-04-08 09:00:00,138 INFO L290 TraceCheckUtils]: 5: Hoare triple {831#true} havoc ~a~0;~len~0 := 0;havoc ~i~0; {942#(< (mod (+ main_~len~0 3) 4294967296) 5)} is VALID [2022-04-08 09:00:00,138 INFO L272 TraceCheckUtils]: 4: Hoare triple {831#true} call #t~ret6 := main(); {831#true} is VALID [2022-04-08 09:00:00,138 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {831#true} {831#true} #44#return; {831#true} is VALID [2022-04-08 09:00:00,138 INFO L290 TraceCheckUtils]: 2: Hoare triple {831#true} assume true; {831#true} is VALID [2022-04-08 09:00:00,139 INFO L290 TraceCheckUtils]: 1: Hoare triple {831#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(8, 2);call #Ultimate.allocInit(12, 3); {831#true} is VALID [2022-04-08 09:00:00,139 INFO L272 TraceCheckUtils]: 0: Hoare triple {831#true} call ULTIMATE.init(); {831#true} is VALID [2022-04-08 09:00:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 09:00:00,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539724737] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-08 09:00:00,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-08 09:00:00,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-08 09:00:00,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 09:00:00,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [562016389] [2022-04-08 09:00:00,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [562016389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 09:00:00,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 09:00:00,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-08 09:00:00,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110701526] [2022-04-08 09:00:00,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 09:00:00,140 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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 20 [2022-04-08 09:00:00,141 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 09:00:00,142 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-04-08 09:00:00,153 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 20 edges. 20 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 09:00:00,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-08 09:00:00,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 09:00:00,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-08 09:00:00,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-04-08 09:00:00,156 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-04-08 09:00:00,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 09:00:00,421 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-04-08 09:00:00,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-08 09:00:00,421 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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 20 [2022-04-08 09:00:00,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 09:00:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-04-08 09:00:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2022-04-08 09:00:00,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-04-08 09:00:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2022-04-08 09:00:00,428 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 9 states and 41 transitions. [2022-04-08 09:00:00,458 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 41 edges. 41 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 09:00:00,460 INFO L225 Difference]: With dead ends: 43 [2022-04-08 09:00:00,460 INFO L226 Difference]: Without dead ends: 26 [2022-04-08 09:00:00,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-04-08 09:00:00,463 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-08 09:00:00,465 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 41 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-08 09:00:00,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-08 09:00:00,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-08 09:00:00,483 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 09:00:00,483 INFO L82 GeneralOperation]: Start isEquivalent. First operand 26 states. Second operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 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) [2022-04-08 09:00:00,483 INFO L74 IsIncluded]: Start isIncluded. First operand 26 states. Second operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 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) [2022-04-08 09:00:00,483 INFO L87 Difference]: Start difference. First operand 26 states. Second operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 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) [2022-04-08 09:00:00,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 09:00:00,485 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2022-04-08 09:00:00,485 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-04-08 09:00:00,487 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 09:00:00,487 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 09:00:00,487 INFO L74 IsIncluded]: Start isIncluded. First operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 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) Second operand 26 states. [2022-04-08 09:00:00,487 INFO L87 Difference]: Start difference. First operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 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) Second operand 26 states. [2022-04-08 09:00:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 09:00:00,488 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2022-04-08 09:00:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-04-08 09:00:00,491 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 09:00:00,491 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 09:00:00,491 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 09:00:00,491 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 09:00:00,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 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) [2022-04-08 09:00:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-04-08 09:00:00,496 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2022-04-08 09:00:00,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 09:00:00,496 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-04-08 09:00:00,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-04-08 09:00:00,496 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 25 states and 26 transitions. [2022-04-08 09:00:00,515 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 26 edges. 26 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 09:00:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-04-08 09:00:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-08 09:00:00,517 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 09:00:00,517 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 09:00:00,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-08 09:00:00,734 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 [2022-04-08 09:00:00,734 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 09:00:00,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 09:00:00,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1635265194, now seen corresponding path program 7 times [2022-04-08 09:00:00,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 09:00:00,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1369793819] [2022-04-08 09:00:00,736 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-08 09:00:00,736 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 09:00:00,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1635265194, now seen corresponding path program 8 times [2022-04-08 09:00:00,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 09:00:00,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815186606] [2022-04-08 09:00:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 09:00:00,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 09:00:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 09:00:00,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-08 09:00:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 09:00:00,862 INFO L290 TraceCheckUtils]: 0: Hoare triple {1181#(and (= |#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(8, 2);call #Ultimate.allocInit(12, 3); {1169#true} is VALID [2022-04-08 09:00:00,862 INFO L290 TraceCheckUtils]: 1: Hoare triple {1169#true} assume true; {1169#true} is VALID [2022-04-08 09:00:00,862 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {1169#true} {1169#true} #44#return; {1169#true} is VALID [2022-04-08 09:00:00,863 INFO L272 TraceCheckUtils]: 0: Hoare triple {1169#true} call ULTIMATE.init(); {1181#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-08 09:00:00,863 INFO L290 TraceCheckUtils]: 1: Hoare triple {1181#(and (= |#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(8, 2);call #Ultimate.allocInit(12, 3); {1169#true} is VALID [2022-04-08 09:00:00,863 INFO L290 TraceCheckUtils]: 2: Hoare triple {1169#true} assume true; {1169#true} is VALID [2022-04-08 09:00:00,863 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1169#true} {1169#true} #44#return; {1169#true} is VALID [2022-04-08 09:00:00,863 INFO L272 TraceCheckUtils]: 4: Hoare triple {1169#true} call #t~ret6 := main(); {1169#true} is VALID [2022-04-08 09:00:00,863 INFO L290 TraceCheckUtils]: 5: Hoare triple {1169#true} havoc ~a~0;~len~0 := 0;havoc ~i~0; {1174#(= main_~len~0 0)} is VALID [2022-04-08 09:00:00,864 INFO L290 TraceCheckUtils]: 6: Hoare triple {1174#(= main_~len~0 0)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1174#(= main_~len~0 0)} is VALID [2022-04-08 09:00:00,864 INFO L290 TraceCheckUtils]: 7: Hoare triple {1174#(= main_~len~0 0)} assume !(4 == ~len~0 % 4294967296); {1174#(= main_~len~0 0)} is VALID [2022-04-08 09:00:00,864 INFO L290 TraceCheckUtils]: 8: Hoare triple {1174#(= main_~len~0 0)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1175#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 09:00:00,865 INFO L290 TraceCheckUtils]: 9: Hoare triple {1175#(and (<= 1 main_~len~0) (<= main_~len~0 1))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1175#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 09:00:00,865 INFO L290 TraceCheckUtils]: 10: Hoare triple {1175#(and (<= 1 main_~len~0) (<= main_~len~0 1))} assume !(4 == ~len~0 % 4294967296); {1175#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 09:00:00,866 INFO L290 TraceCheckUtils]: 11: Hoare triple {1175#(and (<= 1 main_~len~0) (<= main_~len~0 1))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1176#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 09:00:00,866 INFO L290 TraceCheckUtils]: 12: Hoare triple {1176#(and (<= main_~len~0 2) (<= 2 main_~len~0))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1176#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 09:00:00,866 INFO L290 TraceCheckUtils]: 13: Hoare triple {1176#(and (<= main_~len~0 2) (<= 2 main_~len~0))} assume !(4 == ~len~0 % 4294967296); {1176#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 09:00:00,867 INFO L290 TraceCheckUtils]: 14: Hoare triple {1176#(and (<= main_~len~0 2) (<= 2 main_~len~0))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1177#(and (<= 3 main_~len~0) (<= main_~len~0 3))} is VALID [2022-04-08 09:00:00,867 INFO L290 TraceCheckUtils]: 15: Hoare triple {1177#(and (<= 3 main_~len~0) (<= main_~len~0 3))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1177#(and (<= 3 main_~len~0) (<= main_~len~0 3))} is VALID [2022-04-08 09:00:00,868 INFO L290 TraceCheckUtils]: 16: Hoare triple {1177#(and (<= 3 main_~len~0) (<= main_~len~0 3))} assume !(4 == ~len~0 % 4294967296); {1177#(and (<= 3 main_~len~0) (<= main_~len~0 3))} is VALID [2022-04-08 09:00:00,868 INFO L290 TraceCheckUtils]: 17: Hoare triple {1177#(and (<= 3 main_~len~0) (<= main_~len~0 3))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1178#(and (<= main_~len~0 4) (not (<= (+ (div main_~len~0 4294967296) 1) 0)))} is VALID [2022-04-08 09:00:00,869 INFO L290 TraceCheckUtils]: 18: Hoare triple {1178#(and (<= main_~len~0 4) (not (<= (+ (div main_~len~0 4294967296) 1) 0)))} assume !(0 != #t~nondet4 % 256);havoc #t~nondet4; {1178#(and (<= main_~len~0 4) (not (<= (+ (div main_~len~0 4294967296) 1) 0)))} is VALID [2022-04-08 09:00:00,869 INFO L272 TraceCheckUtils]: 19: Hoare triple {1178#(and (<= main_~len~0 4) (not (<= (+ (div main_~len~0 4294967296) 1) 0)))} call __VERIFIER_assert((if ~len~0 % 4294967296 >= 0 && ~len~0 % 4294967296 < 5 then 1 else 0)); {1179#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 09:00:00,869 INFO L290 TraceCheckUtils]: 20: Hoare triple {1179#(not (= |__VERIFIER_assert_#in~cond| 0))} ~cond := #in~cond; {1180#(not (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-08 09:00:00,870 INFO L290 TraceCheckUtils]: 21: Hoare triple {1180#(not (= __VERIFIER_assert_~cond 0))} assume 0 == ~cond; {1170#false} is VALID [2022-04-08 09:00:00,870 INFO L290 TraceCheckUtils]: 22: Hoare triple {1170#false} assume !false; {1170#false} is VALID [2022-04-08 09:00:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 09:00:00,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 09:00:00,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815186606] [2022-04-08 09:00:00,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815186606] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-08 09:00:00,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128480084] [2022-04-08 09:00:00,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-08 09:00:00,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 09:00:00,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 09:00:00,871 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) [2022-04-08 09:00:00,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-08 09:00:00,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-08 09:00:00,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 09:00:00,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-08 09:00:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 09:00:00,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 09:00:01,197 INFO L272 TraceCheckUtils]: 0: Hoare triple {1169#true} call ULTIMATE.init(); {1169#true} is VALID [2022-04-08 09:00:01,198 INFO L290 TraceCheckUtils]: 1: Hoare triple {1169#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(8, 2);call #Ultimate.allocInit(12, 3); {1169#true} is VALID [2022-04-08 09:00:01,198 INFO L290 TraceCheckUtils]: 2: Hoare triple {1169#true} assume true; {1169#true} is VALID [2022-04-08 09:00:01,198 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1169#true} {1169#true} #44#return; {1169#true} is VALID [2022-04-08 09:00:01,198 INFO L272 TraceCheckUtils]: 4: Hoare triple {1169#true} call #t~ret6 := main(); {1169#true} is VALID [2022-04-08 09:00:01,199 INFO L290 TraceCheckUtils]: 5: Hoare triple {1169#true} havoc ~a~0;~len~0 := 0;havoc ~i~0; {1174#(= main_~len~0 0)} is VALID [2022-04-08 09:00:01,199 INFO L290 TraceCheckUtils]: 6: Hoare triple {1174#(= main_~len~0 0)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1174#(= main_~len~0 0)} is VALID [2022-04-08 09:00:01,199 INFO L290 TraceCheckUtils]: 7: Hoare triple {1174#(= main_~len~0 0)} assume !(4 == ~len~0 % 4294967296); {1174#(= main_~len~0 0)} is VALID [2022-04-08 09:00:01,200 INFO L290 TraceCheckUtils]: 8: Hoare triple {1174#(= main_~len~0 0)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1175#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 09:00:01,200 INFO L290 TraceCheckUtils]: 9: Hoare triple {1175#(and (<= 1 main_~len~0) (<= main_~len~0 1))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1175#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 09:00:01,201 INFO L290 TraceCheckUtils]: 10: Hoare triple {1175#(and (<= 1 main_~len~0) (<= main_~len~0 1))} assume !(4 == ~len~0 % 4294967296); {1175#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 09:00:01,201 INFO L290 TraceCheckUtils]: 11: Hoare triple {1175#(and (<= 1 main_~len~0) (<= main_~len~0 1))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1176#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 09:00:01,201 INFO L290 TraceCheckUtils]: 12: Hoare triple {1176#(and (<= main_~len~0 2) (<= 2 main_~len~0))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1176#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 09:00:01,202 INFO L290 TraceCheckUtils]: 13: Hoare triple {1176#(and (<= main_~len~0 2) (<= 2 main_~len~0))} assume !(4 == ~len~0 % 4294967296); {1176#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 09:00:01,203 INFO L290 TraceCheckUtils]: 14: Hoare triple {1176#(and (<= main_~len~0 2) (<= 2 main_~len~0))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1177#(and (<= 3 main_~len~0) (<= main_~len~0 3))} is VALID [2022-04-08 09:00:01,203 INFO L290 TraceCheckUtils]: 15: Hoare triple {1177#(and (<= 3 main_~len~0) (<= main_~len~0 3))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1177#(and (<= 3 main_~len~0) (<= main_~len~0 3))} is VALID [2022-04-08 09:00:01,203 INFO L290 TraceCheckUtils]: 16: Hoare triple {1177#(and (<= 3 main_~len~0) (<= main_~len~0 3))} assume !(4 == ~len~0 % 4294967296); {1177#(and (<= 3 main_~len~0) (<= main_~len~0 3))} is VALID [2022-04-08 09:00:01,204 INFO L290 TraceCheckUtils]: 17: Hoare triple {1177#(and (<= 3 main_~len~0) (<= main_~len~0 3))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1236#(and (<= main_~len~0 4) (<= 4 main_~len~0))} is VALID [2022-04-08 09:00:01,204 INFO L290 TraceCheckUtils]: 18: Hoare triple {1236#(and (<= main_~len~0 4) (<= 4 main_~len~0))} assume !(0 != #t~nondet4 % 256);havoc #t~nondet4; {1236#(and (<= main_~len~0 4) (<= 4 main_~len~0))} is VALID [2022-04-08 09:00:01,205 INFO L272 TraceCheckUtils]: 19: Hoare triple {1236#(and (<= main_~len~0 4) (<= 4 main_~len~0))} call __VERIFIER_assert((if ~len~0 % 4294967296 >= 0 && ~len~0 % 4294967296 < 5 then 1 else 0)); {1243#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 09:00:01,205 INFO L290 TraceCheckUtils]: 20: Hoare triple {1243#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {1247#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 09:00:01,206 INFO L290 TraceCheckUtils]: 21: Hoare triple {1247#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {1170#false} is VALID [2022-04-08 09:00:01,206 INFO L290 TraceCheckUtils]: 22: Hoare triple {1170#false} assume !false; {1170#false} is VALID [2022-04-08 09:00:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 09:00:01,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-08 09:00:01,385 INFO L290 TraceCheckUtils]: 22: Hoare triple {1170#false} assume !false; {1170#false} is VALID [2022-04-08 09:00:01,387 INFO L290 TraceCheckUtils]: 21: Hoare triple {1247#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {1170#false} is VALID [2022-04-08 09:00:01,387 INFO L290 TraceCheckUtils]: 20: Hoare triple {1243#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {1247#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 09:00:01,388 INFO L272 TraceCheckUtils]: 19: Hoare triple {1263#(< (mod main_~len~0 4294967296) 5)} call __VERIFIER_assert((if ~len~0 % 4294967296 >= 0 && ~len~0 % 4294967296 < 5 then 1 else 0)); {1243#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 09:00:01,392 INFO L290 TraceCheckUtils]: 18: Hoare triple {1263#(< (mod main_~len~0 4294967296) 5)} assume !(0 != #t~nondet4 % 256);havoc #t~nondet4; {1263#(< (mod main_~len~0 4294967296) 5)} is VALID [2022-04-08 09:00:01,393 INFO L290 TraceCheckUtils]: 17: Hoare triple {1270#(< (mod (+ main_~len~0 1) 4294967296) 5)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1263#(< (mod main_~len~0 4294967296) 5)} is VALID [2022-04-08 09:00:01,393 INFO L290 TraceCheckUtils]: 16: Hoare triple {1270#(< (mod (+ main_~len~0 1) 4294967296) 5)} assume !(4 == ~len~0 % 4294967296); {1270#(< (mod (+ main_~len~0 1) 4294967296) 5)} is VALID [2022-04-08 09:00:01,393 INFO L290 TraceCheckUtils]: 15: Hoare triple {1270#(< (mod (+ main_~len~0 1) 4294967296) 5)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1270#(< (mod (+ main_~len~0 1) 4294967296) 5)} is VALID [2022-04-08 09:00:01,394 INFO L290 TraceCheckUtils]: 14: Hoare triple {1280#(< (mod (+ main_~len~0 2) 4294967296) 5)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1270#(< (mod (+ main_~len~0 1) 4294967296) 5)} is VALID [2022-04-08 09:00:01,394 INFO L290 TraceCheckUtils]: 13: Hoare triple {1280#(< (mod (+ main_~len~0 2) 4294967296) 5)} assume !(4 == ~len~0 % 4294967296); {1280#(< (mod (+ main_~len~0 2) 4294967296) 5)} is VALID [2022-04-08 09:00:01,395 INFO L290 TraceCheckUtils]: 12: Hoare triple {1280#(< (mod (+ main_~len~0 2) 4294967296) 5)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1280#(< (mod (+ main_~len~0 2) 4294967296) 5)} is VALID [2022-04-08 09:00:01,396 INFO L290 TraceCheckUtils]: 11: Hoare triple {1290#(< (mod (+ main_~len~0 3) 4294967296) 5)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1280#(< (mod (+ main_~len~0 2) 4294967296) 5)} is VALID [2022-04-08 09:00:01,396 INFO L290 TraceCheckUtils]: 10: Hoare triple {1290#(< (mod (+ main_~len~0 3) 4294967296) 5)} assume !(4 == ~len~0 % 4294967296); {1290#(< (mod (+ main_~len~0 3) 4294967296) 5)} is VALID [2022-04-08 09:00:01,396 INFO L290 TraceCheckUtils]: 9: Hoare triple {1290#(< (mod (+ main_~len~0 3) 4294967296) 5)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1290#(< (mod (+ main_~len~0 3) 4294967296) 5)} is VALID [2022-04-08 09:00:01,397 INFO L290 TraceCheckUtils]: 8: Hoare triple {1300#(< (mod (+ main_~len~0 4) 4294967296) 5)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1290#(< (mod (+ main_~len~0 3) 4294967296) 5)} is VALID [2022-04-08 09:00:01,397 INFO L290 TraceCheckUtils]: 7: Hoare triple {1300#(< (mod (+ main_~len~0 4) 4294967296) 5)} assume !(4 == ~len~0 % 4294967296); {1300#(< (mod (+ main_~len~0 4) 4294967296) 5)} is VALID [2022-04-08 09:00:01,398 INFO L290 TraceCheckUtils]: 6: Hoare triple {1300#(< (mod (+ main_~len~0 4) 4294967296) 5)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1300#(< (mod (+ main_~len~0 4) 4294967296) 5)} is VALID [2022-04-08 09:00:01,398 INFO L290 TraceCheckUtils]: 5: Hoare triple {1169#true} havoc ~a~0;~len~0 := 0;havoc ~i~0; {1300#(< (mod (+ main_~len~0 4) 4294967296) 5)} is VALID [2022-04-08 09:00:01,398 INFO L272 TraceCheckUtils]: 4: Hoare triple {1169#true} call #t~ret6 := main(); {1169#true} is VALID [2022-04-08 09:00:01,398 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1169#true} {1169#true} #44#return; {1169#true} is VALID [2022-04-08 09:00:01,398 INFO L290 TraceCheckUtils]: 2: Hoare triple {1169#true} assume true; {1169#true} is VALID [2022-04-08 09:00:01,398 INFO L290 TraceCheckUtils]: 1: Hoare triple {1169#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(8, 2);call #Ultimate.allocInit(12, 3); {1169#true} is VALID [2022-04-08 09:00:01,398 INFO L272 TraceCheckUtils]: 0: Hoare triple {1169#true} call ULTIMATE.init(); {1169#true} is VALID [2022-04-08 09:00:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 09:00:01,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128480084] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-08 09:00:01,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-08 09:00:01,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-08 09:00:01,399 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 09:00:01,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1369793819] [2022-04-08 09:00:01,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1369793819] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 09:00:01,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 09:00:01,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-08 09:00:01,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510970770] [2022-04-08 09:00:01,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 09:00:01,400 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 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 23 [2022-04-08 09:00:01,400 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 09:00:01,400 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 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) [2022-04-08 09:00:01,415 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 23 edges. 23 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 09:00:01,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-08 09:00:01,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 09:00:01,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-08 09:00:01,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-04-08 09:00:01,416 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 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) [2022-04-08 09:00:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 09:00:01,702 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-04-08 09:00:01,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-08 09:00:01,702 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 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 23 [2022-04-08 09:00:01,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 09:00:01,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 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) [2022-04-08 09:00:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 36 transitions. [2022-04-08 09:00:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 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) [2022-04-08 09:00:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 36 transitions. [2022-04-08 09:00:01,704 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 10 states and 36 transitions. [2022-04-08 09:00:01,732 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 36 edges. 36 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 09:00:01,733 INFO L225 Difference]: With dead ends: 34 [2022-04-08 09:00:01,733 INFO L226 Difference]: Without dead ends: 29 [2022-04-08 09:00:01,733 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-04-08 09:00:01,734 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-08 09:00:01,734 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 41 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-08 09:00:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-08 09:00:01,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-04-08 09:00:01,762 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 09:00:01,762 INFO L82 GeneralOperation]: Start isEquivalent. First operand 29 states. Second operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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) [2022-04-08 09:00:01,763 INFO L74 IsIncluded]: Start isIncluded. First operand 29 states. Second operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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) [2022-04-08 09:00:01,763 INFO L87 Difference]: Start difference. First operand 29 states. Second operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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) [2022-04-08 09:00:01,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 09:00:01,764 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-04-08 09:00:01,764 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-04-08 09:00:01,764 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 09:00:01,764 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 09:00:01,764 INFO L74 IsIncluded]: Start isIncluded. First operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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) Second operand 29 states. [2022-04-08 09:00:01,765 INFO L87 Difference]: Start difference. First operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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) Second operand 29 states. [2022-04-08 09:00:01,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 09:00:01,767 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-04-08 09:00:01,768 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-04-08 09:00:01,768 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 09:00:01,768 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 09:00:01,768 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 09:00:01,768 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 09:00:01,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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) [2022-04-08 09:00:01,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-04-08 09:00:01,769 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2022-04-08 09:00:01,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 09:00:01,769 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-04-08 09:00:01,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 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) [2022-04-08 09:00:01,769 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 27 states and 28 transitions. [2022-04-08 09:00:01,792 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 09:00:01,792 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-04-08 09:00:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-08 09:00:01,793 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 09:00:01,793 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 09:00:01,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-08 09:00:02,009 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 [2022-04-08 09:00:02,010 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 09:00:02,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 09:00:02,010 INFO L85 PathProgramCache]: Analyzing trace with hash 778715369, now seen corresponding path program 9 times [2022-04-08 09:00:02,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 09:00:02,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1608241114] [2022-04-08 09:00:02,012 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-04-08 09:00:02,012 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 09:00:02,013 INFO L85 PathProgramCache]: Analyzing trace with hash 778715369, now seen corresponding path program 10 times [2022-04-08 09:00:02,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 09:00:02,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392485637] [2022-04-08 09:00:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 09:00:02,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 09:00:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 09:00:02,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-08 09:00:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 09:00:02,169 INFO L290 TraceCheckUtils]: 0: Hoare triple {1531#(and (= |#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(8, 2);call #Ultimate.allocInit(12, 3); {1521#true} is VALID [2022-04-08 09:00:02,169 INFO L290 TraceCheckUtils]: 1: Hoare triple {1521#true} assume true; {1521#true} is VALID [2022-04-08 09:00:02,170 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {1521#true} {1521#true} #44#return; {1521#true} is VALID [2022-04-08 09:00:02,170 INFO L272 TraceCheckUtils]: 0: Hoare triple {1521#true} call ULTIMATE.init(); {1531#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-08 09:00:02,170 INFO L290 TraceCheckUtils]: 1: Hoare triple {1531#(and (= |#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(8, 2);call #Ultimate.allocInit(12, 3); {1521#true} is VALID [2022-04-08 09:00:02,170 INFO L290 TraceCheckUtils]: 2: Hoare triple {1521#true} assume true; {1521#true} is VALID [2022-04-08 09:00:02,170 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1521#true} {1521#true} #44#return; {1521#true} is VALID [2022-04-08 09:00:02,170 INFO L272 TraceCheckUtils]: 4: Hoare triple {1521#true} call #t~ret6 := main(); {1521#true} is VALID [2022-04-08 09:00:02,171 INFO L290 TraceCheckUtils]: 5: Hoare triple {1521#true} havoc ~a~0;~len~0 := 0;havoc ~i~0; {1526#(= main_~len~0 0)} is VALID [2022-04-08 09:00:02,171 INFO L290 TraceCheckUtils]: 6: Hoare triple {1526#(= main_~len~0 0)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1526#(= main_~len~0 0)} is VALID [2022-04-08 09:00:02,171 INFO L290 TraceCheckUtils]: 7: Hoare triple {1526#(= main_~len~0 0)} assume !(4 == ~len~0 % 4294967296); {1526#(= main_~len~0 0)} is VALID [2022-04-08 09:00:02,172 INFO L290 TraceCheckUtils]: 8: Hoare triple {1526#(= main_~len~0 0)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1527#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 09:00:02,172 INFO L290 TraceCheckUtils]: 9: Hoare triple {1527#(and (<= 1 main_~len~0) (<= main_~len~0 1))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1527#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 09:00:02,172 INFO L290 TraceCheckUtils]: 10: Hoare triple {1527#(and (<= 1 main_~len~0) (<= main_~len~0 1))} assume !(4 == ~len~0 % 4294967296); {1527#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 09:00:02,173 INFO L290 TraceCheckUtils]: 11: Hoare triple {1527#(and (<= 1 main_~len~0) (<= main_~len~0 1))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1528#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 09:00:02,173 INFO L290 TraceCheckUtils]: 12: Hoare triple {1528#(and (<= main_~len~0 2) (<= 2 main_~len~0))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1528#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 09:00:02,174 INFO L290 TraceCheckUtils]: 13: Hoare triple {1528#(and (<= main_~len~0 2) (<= 2 main_~len~0))} assume !(4 == ~len~0 % 4294967296); {1528#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 09:00:02,174 INFO L290 TraceCheckUtils]: 14: Hoare triple {1528#(and (<= main_~len~0 2) (<= 2 main_~len~0))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1529#(and (<= 3 main_~len~0) (<= main_~len~0 3))} is VALID [2022-04-08 09:00:02,174 INFO L290 TraceCheckUtils]: 15: Hoare triple {1529#(and (<= 3 main_~len~0) (<= main_~len~0 3))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1529#(and (<= 3 main_~len~0) (<= main_~len~0 3))} is VALID [2022-04-08 09:00:02,175 INFO L290 TraceCheckUtils]: 16: Hoare triple {1529#(and (<= 3 main_~len~0) (<= main_~len~0 3))} assume !(4 == ~len~0 % 4294967296); {1529#(and (<= 3 main_~len~0) (<= main_~len~0 3))} is VALID [2022-04-08 09:00:02,175 INFO L290 TraceCheckUtils]: 17: Hoare triple {1529#(and (<= 3 main_~len~0) (<= main_~len~0 3))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1530#(and (<= main_~len~0 (+ (* (div main_~len~0 4294967296) 4294967296) 4)) (<= (div main_~len~0 4294967296) 0) (< (+ (* (div main_~len~0 4294967296) 4294967296) 3) main_~len~0))} is VALID [2022-04-08 09:00:02,176 INFO L290 TraceCheckUtils]: 18: Hoare triple {1530#(and (<= main_~len~0 (+ (* (div main_~len~0 4294967296) 4294967296) 4)) (<= (div main_~len~0 4294967296) 0) (< (+ (* (div main_~len~0 4294967296) 4294967296) 3) main_~len~0))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1530#(and (<= main_~len~0 (+ (* (div main_~len~0 4294967296) 4294967296) 4)) (<= (div main_~len~0 4294967296) 0) (< (+ (* (div main_~len~0 4294967296) 4294967296) 3) main_~len~0))} is VALID [2022-04-08 09:00:02,176 INFO L290 TraceCheckUtils]: 19: Hoare triple {1530#(and (<= main_~len~0 (+ (* (div main_~len~0 4294967296) 4294967296) 4)) (<= (div main_~len~0 4294967296) 0) (< (+ (* (div main_~len~0 4294967296) 4294967296) 3) main_~len~0))} assume !(4 == ~len~0 % 4294967296); {1522#false} is VALID [2022-04-08 09:00:02,176 INFO L290 TraceCheckUtils]: 20: Hoare triple {1522#false} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1522#false} is VALID [2022-04-08 09:00:02,177 INFO L290 TraceCheckUtils]: 21: Hoare triple {1522#false} assume !(0 != #t~nondet4 % 256);havoc #t~nondet4; {1522#false} is VALID [2022-04-08 09:00:02,177 INFO L272 TraceCheckUtils]: 22: Hoare triple {1522#false} call __VERIFIER_assert((if ~len~0 % 4294967296 >= 0 && ~len~0 % 4294967296 < 5 then 1 else 0)); {1522#false} is VALID [2022-04-08 09:00:02,177 INFO L290 TraceCheckUtils]: 23: Hoare triple {1522#false} ~cond := #in~cond; {1522#false} is VALID [2022-04-08 09:00:02,177 INFO L290 TraceCheckUtils]: 24: Hoare triple {1522#false} assume 0 == ~cond; {1522#false} is VALID [2022-04-08 09:00:02,177 INFO L290 TraceCheckUtils]: 25: Hoare triple {1522#false} assume !false; {1522#false} is VALID [2022-04-08 09:00:02,178 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 09:00:02,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 09:00:02,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392485637] [2022-04-08 09:00:02,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392485637] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-08 09:00:02,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290471608] [2022-04-08 09:00:02,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-08 09:00:02,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 09:00:02,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 09:00:02,180 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) [2022-04-08 09:00:02,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-08 09:00:02,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-08 09:00:02,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 09:00:02,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-08 09:00:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 09:00:02,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 09:00:02,500 INFO L272 TraceCheckUtils]: 0: Hoare triple {1521#true} call ULTIMATE.init(); {1521#true} is VALID [2022-04-08 09:00:02,500 INFO L290 TraceCheckUtils]: 1: Hoare triple {1521#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(8, 2);call #Ultimate.allocInit(12, 3); {1521#true} is VALID [2022-04-08 09:00:02,500 INFO L290 TraceCheckUtils]: 2: Hoare triple {1521#true} assume true; {1521#true} is VALID [2022-04-08 09:00:02,501 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1521#true} {1521#true} #44#return; {1521#true} is VALID [2022-04-08 09:00:02,501 INFO L272 TraceCheckUtils]: 4: Hoare triple {1521#true} call #t~ret6 := main(); {1521#true} is VALID [2022-04-08 09:00:02,501 INFO L290 TraceCheckUtils]: 5: Hoare triple {1521#true} havoc ~a~0;~len~0 := 0;havoc ~i~0; {1526#(= main_~len~0 0)} is VALID [2022-04-08 09:00:02,501 INFO L290 TraceCheckUtils]: 6: Hoare triple {1526#(= main_~len~0 0)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1526#(= main_~len~0 0)} is VALID [2022-04-08 09:00:02,502 INFO L290 TraceCheckUtils]: 7: Hoare triple {1526#(= main_~len~0 0)} assume !(4 == ~len~0 % 4294967296); {1526#(= main_~len~0 0)} is VALID [2022-04-08 09:00:02,502 INFO L290 TraceCheckUtils]: 8: Hoare triple {1526#(= main_~len~0 0)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1527#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 09:00:02,502 INFO L290 TraceCheckUtils]: 9: Hoare triple {1527#(and (<= 1 main_~len~0) (<= main_~len~0 1))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1527#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 09:00:02,503 INFO L290 TraceCheckUtils]: 10: Hoare triple {1527#(and (<= 1 main_~len~0) (<= main_~len~0 1))} assume !(4 == ~len~0 % 4294967296); {1527#(and (<= 1 main_~len~0) (<= main_~len~0 1))} is VALID [2022-04-08 09:00:02,503 INFO L290 TraceCheckUtils]: 11: Hoare triple {1527#(and (<= 1 main_~len~0) (<= main_~len~0 1))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1528#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 09:00:02,504 INFO L290 TraceCheckUtils]: 12: Hoare triple {1528#(and (<= main_~len~0 2) (<= 2 main_~len~0))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1528#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 09:00:02,504 INFO L290 TraceCheckUtils]: 13: Hoare triple {1528#(and (<= main_~len~0 2) (<= 2 main_~len~0))} assume !(4 == ~len~0 % 4294967296); {1528#(and (<= main_~len~0 2) (<= 2 main_~len~0))} is VALID [2022-04-08 09:00:02,505 INFO L290 TraceCheckUtils]: 14: Hoare triple {1528#(and (<= main_~len~0 2) (<= 2 main_~len~0))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1529#(and (<= 3 main_~len~0) (<= main_~len~0 3))} is VALID [2022-04-08 09:00:02,505 INFO L290 TraceCheckUtils]: 15: Hoare triple {1529#(and (<= 3 main_~len~0) (<= main_~len~0 3))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1529#(and (<= 3 main_~len~0) (<= main_~len~0 3))} is VALID [2022-04-08 09:00:02,505 INFO L290 TraceCheckUtils]: 16: Hoare triple {1529#(and (<= 3 main_~len~0) (<= main_~len~0 3))} assume !(4 == ~len~0 % 4294967296); {1529#(and (<= 3 main_~len~0) (<= main_~len~0 3))} is VALID [2022-04-08 09:00:02,506 INFO L290 TraceCheckUtils]: 17: Hoare triple {1529#(and (<= 3 main_~len~0) (<= main_~len~0 3))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1586#(and (<= main_~len~0 4) (<= 4 main_~len~0))} is VALID [2022-04-08 09:00:02,506 INFO L290 TraceCheckUtils]: 18: Hoare triple {1586#(and (<= main_~len~0 4) (<= 4 main_~len~0))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1586#(and (<= main_~len~0 4) (<= 4 main_~len~0))} is VALID [2022-04-08 09:00:02,507 INFO L290 TraceCheckUtils]: 19: Hoare triple {1586#(and (<= main_~len~0 4) (<= 4 main_~len~0))} assume !(4 == ~len~0 % 4294967296); {1522#false} is VALID [2022-04-08 09:00:02,507 INFO L290 TraceCheckUtils]: 20: Hoare triple {1522#false} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1522#false} is VALID [2022-04-08 09:00:02,507 INFO L290 TraceCheckUtils]: 21: Hoare triple {1522#false} assume !(0 != #t~nondet4 % 256);havoc #t~nondet4; {1522#false} is VALID [2022-04-08 09:00:02,507 INFO L272 TraceCheckUtils]: 22: Hoare triple {1522#false} call __VERIFIER_assert((if ~len~0 % 4294967296 >= 0 && ~len~0 % 4294967296 < 5 then 1 else 0)); {1522#false} is VALID [2022-04-08 09:00:02,507 INFO L290 TraceCheckUtils]: 23: Hoare triple {1522#false} ~cond := #in~cond; {1522#false} is VALID [2022-04-08 09:00:02,507 INFO L290 TraceCheckUtils]: 24: Hoare triple {1522#false} assume 0 == ~cond; {1522#false} is VALID [2022-04-08 09:00:02,507 INFO L290 TraceCheckUtils]: 25: Hoare triple {1522#false} assume !false; {1522#false} is VALID [2022-04-08 09:00:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 09:00:02,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-08 09:00:02,625 INFO L290 TraceCheckUtils]: 25: Hoare triple {1522#false} assume !false; {1522#false} is VALID [2022-04-08 09:00:02,625 INFO L290 TraceCheckUtils]: 24: Hoare triple {1522#false} assume 0 == ~cond; {1522#false} is VALID [2022-04-08 09:00:02,626 INFO L290 TraceCheckUtils]: 23: Hoare triple {1522#false} ~cond := #in~cond; {1522#false} is VALID [2022-04-08 09:00:02,626 INFO L272 TraceCheckUtils]: 22: Hoare triple {1522#false} call __VERIFIER_assert((if ~len~0 % 4294967296 >= 0 && ~len~0 % 4294967296 < 5 then 1 else 0)); {1522#false} is VALID [2022-04-08 09:00:02,626 INFO L290 TraceCheckUtils]: 21: Hoare triple {1522#false} assume !(0 != #t~nondet4 % 256);havoc #t~nondet4; {1522#false} is VALID [2022-04-08 09:00:02,626 INFO L290 TraceCheckUtils]: 20: Hoare triple {1522#false} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1522#false} is VALID [2022-04-08 09:00:02,626 INFO L290 TraceCheckUtils]: 19: Hoare triple {1629#(= (mod main_~len~0 4294967296) 4)} assume !(4 == ~len~0 % 4294967296); {1522#false} is VALID [2022-04-08 09:00:02,627 INFO L290 TraceCheckUtils]: 18: Hoare triple {1629#(= (mod main_~len~0 4294967296) 4)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1629#(= (mod main_~len~0 4294967296) 4)} is VALID [2022-04-08 09:00:02,627 INFO L290 TraceCheckUtils]: 17: Hoare triple {1636#(= (mod (+ main_~len~0 1) 4294967296) 4)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1629#(= (mod main_~len~0 4294967296) 4)} is VALID [2022-04-08 09:00:02,628 INFO L290 TraceCheckUtils]: 16: Hoare triple {1636#(= (mod (+ main_~len~0 1) 4294967296) 4)} assume !(4 == ~len~0 % 4294967296); {1636#(= (mod (+ main_~len~0 1) 4294967296) 4)} is VALID [2022-04-08 09:00:02,628 INFO L290 TraceCheckUtils]: 15: Hoare triple {1636#(= (mod (+ main_~len~0 1) 4294967296) 4)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1636#(= (mod (+ main_~len~0 1) 4294967296) 4)} is VALID [2022-04-08 09:00:02,629 INFO L290 TraceCheckUtils]: 14: Hoare triple {1646#(= (mod (+ main_~len~0 2) 4294967296) 4)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1636#(= (mod (+ main_~len~0 1) 4294967296) 4)} is VALID [2022-04-08 09:00:02,630 INFO L290 TraceCheckUtils]: 13: Hoare triple {1646#(= (mod (+ main_~len~0 2) 4294967296) 4)} assume !(4 == ~len~0 % 4294967296); {1646#(= (mod (+ main_~len~0 2) 4294967296) 4)} is VALID [2022-04-08 09:00:02,630 INFO L290 TraceCheckUtils]: 12: Hoare triple {1646#(= (mod (+ main_~len~0 2) 4294967296) 4)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1646#(= (mod (+ main_~len~0 2) 4294967296) 4)} is VALID [2022-04-08 09:00:02,631 INFO L290 TraceCheckUtils]: 11: Hoare triple {1656#(= (mod (+ main_~len~0 3) 4294967296) 4)} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1646#(= (mod (+ main_~len~0 2) 4294967296) 4)} is VALID [2022-04-08 09:00:02,631 INFO L290 TraceCheckUtils]: 10: Hoare triple {1656#(= (mod (+ main_~len~0 3) 4294967296) 4)} assume !(4 == ~len~0 % 4294967296); {1656#(= (mod (+ main_~len~0 3) 4294967296) 4)} is VALID [2022-04-08 09:00:02,632 INFO L290 TraceCheckUtils]: 9: Hoare triple {1656#(= (mod (+ main_~len~0 3) 4294967296) 4)} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1656#(= (mod (+ main_~len~0 3) 4294967296) 4)} is VALID [2022-04-08 09:00:02,632 INFO L290 TraceCheckUtils]: 8: Hoare triple {1666#(= 4 (mod (+ main_~len~0 4) 4294967296))} ~a~0 := ~a~0[~len~0 % 4294967296 := 0];#t~post5 := ~len~0;~len~0 := 1 + #t~post5;havoc #t~post5; {1656#(= (mod (+ main_~len~0 3) 4294967296) 4)} is VALID [2022-04-08 09:00:02,633 INFO L290 TraceCheckUtils]: 7: Hoare triple {1666#(= 4 (mod (+ main_~len~0 4) 4294967296))} assume !(4 == ~len~0 % 4294967296); {1666#(= 4 (mod (+ main_~len~0 4) 4294967296))} is VALID [2022-04-08 09:00:02,633 INFO L290 TraceCheckUtils]: 6: Hoare triple {1666#(= 4 (mod (+ main_~len~0 4) 4294967296))} assume !!(0 != #t~nondet4 % 256);havoc #t~nondet4; {1666#(= 4 (mod (+ main_~len~0 4) 4294967296))} is VALID [2022-04-08 09:00:02,634 INFO L290 TraceCheckUtils]: 5: Hoare triple {1521#true} havoc ~a~0;~len~0 := 0;havoc ~i~0; {1666#(= 4 (mod (+ main_~len~0 4) 4294967296))} is VALID [2022-04-08 09:00:02,634 INFO L272 TraceCheckUtils]: 4: Hoare triple {1521#true} call #t~ret6 := main(); {1521#true} is VALID [2022-04-08 09:00:02,634 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1521#true} {1521#true} #44#return; {1521#true} is VALID [2022-04-08 09:00:02,634 INFO L290 TraceCheckUtils]: 2: Hoare triple {1521#true} assume true; {1521#true} is VALID [2022-04-08 09:00:02,634 INFO L290 TraceCheckUtils]: 1: Hoare triple {1521#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(8, 2);call #Ultimate.allocInit(12, 3); {1521#true} is VALID [2022-04-08 09:00:02,634 INFO L272 TraceCheckUtils]: 0: Hoare triple {1521#true} call ULTIMATE.init(); {1521#true} is VALID [2022-04-08 09:00:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 09:00:02,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290471608] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-08 09:00:02,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-08 09:00:02,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-08 09:00:02,635 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 09:00:02,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1608241114] [2022-04-08 09:00:02,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1608241114] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 09:00:02,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 09:00:02,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-08 09:00:02,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073257013] [2022-04-08 09:00:02,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 09:00:02,635 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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 26 [2022-04-08 09:00:02,636 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 09:00:02,636 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-04-08 09:00:02,655 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 26 edges. 26 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 09:00:02,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-08 09:00:02,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 09:00:02,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-08 09:00:02,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-04-08 09:00:02,656 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-04-08 09:00:02,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 09:00:02,857 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2022-04-08 09:00:02,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-08 09:00:02,857 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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 26 [2022-04-08 09:00:02,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 09:00:02,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-04-08 09:00:02,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 30 transitions. [2022-04-08 09:00:02,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-04-08 09:00:02,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 30 transitions. [2022-04-08 09:00:02,859 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 8 states and 30 transitions. [2022-04-08 09:00:02,881 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 30 edges. 30 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 09:00:02,882 INFO L225 Difference]: With dead ends: 39 [2022-04-08 09:00:02,882 INFO L226 Difference]: Without dead ends: 0 [2022-04-08 09:00:02,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-04-08 09:00:02,883 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-08 09:00:02,883 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 38 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-08 09:00:02,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-08 09:00:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-08 09:00:02,883 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 09:00:02,883 INFO L82 GeneralOperation]: Start isEquivalent. First operand 0 states. Second operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-08 09:00:02,883 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-08 09:00:02,884 INFO L87 Difference]: Start difference. First operand 0 states. Second operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-08 09:00:02,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 09:00:02,884 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2022-04-08 09:00:02,884 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-08 09:00:02,884 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 09:00:02,884 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 09:00:02,884 INFO L74 IsIncluded]: Start isIncluded. First operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand 0 states. [2022-04-08 09:00:02,884 INFO L87 Difference]: Start difference. First operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand 0 states. [2022-04-08 09:00:02,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 09:00:02,884 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2022-04-08 09:00:02,884 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-08 09:00:02,884 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 09:00:02,885 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 09:00:02,885 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 09:00:02,885 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 09:00:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-08 09:00:02,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-08 09:00:02,885 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2022-04-08 09:00:02,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 09:00:02,885 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-08 09:00:02,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-04-08 09:00:02,885 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 0 states and 0 transitions. [2022-04-08 09:00:02,885 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 09:00:02,885 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-08 09:00:02,886 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 09:00:02,888 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-08 09:00:02,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-08 09:00:03,105 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 [2022-04-08 09:00:03,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-08 09:00:03,220 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-04-08 09:00:03,220 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-04-08 09:00:03,220 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-04-08 09:00:03,220 INFO L885 garLoopResultBuilder]: At program point L30(line 30) the Hoare annotation is: true [2022-04-08 09:00:03,220 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 14 34) the Hoare annotation is: true [2022-04-08 09:00:03,221 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 14 34) the Hoare annotation is: true [2022-04-08 09:00:03,221 INFO L878 garLoopResultBuilder]: At program point L23(lines 23 24) the Hoare annotation is: (let ((.cse0 (div main_~len~0 4294967296))) (or (and (<= main_~len~0 3) (not (<= (+ .cse0 1) 0))) (let ((.cse1 (* .cse0 4294967296))) (and (<= main_~len~0 (+ .cse1 4)) (<= .cse0 0) (< (+ .cse1 3) main_~len~0))))) [2022-04-08 09:00:03,221 INFO L878 garLoopResultBuilder]: At program point L23-2(lines 23 24) the Hoare annotation is: (or (and (<= 3 main_~len~0) (<= main_~len~0 3)) (and (<= main_~len~0 2) (<= 2 main_~len~0)) (= main_~len~0 0) (and (<= 1 main_~len~0) (<= main_~len~0 1))) [2022-04-08 09:00:03,221 INFO L878 garLoopResultBuilder]: At program point L21-2(lines 21 29) the Hoare annotation is: (let ((.cse0 (div main_~len~0 4294967296))) (and (<= main_~len~0 (+ (* .cse0 4294967296) 4)) (<= .cse0 0) (not (<= (+ .cse0 1) 0)))) [2022-04-08 09:00:03,221 INFO L878 garLoopResultBuilder]: At program point L21-3(lines 21 29) the Hoare annotation is: (and (<= main_~len~0 4) (not (<= (+ (div main_~len~0 4294967296) 1) 0))) [2022-04-08 09:00:03,221 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 14 34) the Hoare annotation is: true [2022-04-08 09:00:03,221 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-08 09:00:03,221 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-08 09:00:03,221 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-08 09:00:03,221 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-08 09:00:03,221 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-08 09:00:03,221 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-08 09:00:03,221 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-08 09:00:03,221 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2022-04-08 09:00:03,221 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 5 10) the Hoare annotation is: true [2022-04-08 09:00:03,221 INFO L878 garLoopResultBuilder]: At program point L7(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-08 09:00:03,221 INFO L878 garLoopResultBuilder]: At program point L6(lines 6 8) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2022-04-08 09:00:03,222 INFO L885 garLoopResultBuilder]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2022-04-08 09:00:03,222 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-08 09:00:03,223 INFO L719 BasicCegarLoop]: Path program histogram: [10, 2, 2] [2022-04-08 09:00:03,224 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-08 09:00:03,226 WARN L170 areAnnotationChecker]: reach_errorENTRY has no Hoare annotation [2022-04-08 09:00:03,227 WARN L170 areAnnotationChecker]: reach_errorFINAL has no Hoare annotation [2022-04-08 09:00:03,236 INFO L163 areAnnotationChecker]: CFG has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2022-04-08 09:00:03,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.04 09:00:03 BoogieIcfgContainer [2022-04-08 09:00:03,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-08 09:00:03,242 INFO L158 Benchmark]: Toolchain (without parser) took 6776.43ms. Allocated memory was 211.8MB in the beginning and 290.5MB in the end (delta: 78.6MB). Free memory was 161.6MB in the beginning and 165.9MB in the end (delta: -4.2MB). Peak memory consumption was 75.7MB. Max. memory is 8.0GB. [2022-04-08 09:00:03,242 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 211.8MB. Free memory was 177.7MB in the beginning and 177.6MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-08 09:00:03,242 INFO L158 Benchmark]: CACSL2BoogieTranslator took 189.85ms. Allocated memory is still 211.8MB. Free memory was 161.5MB in the beginning and 188.5MB in the end (delta: -27.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-08 09:00:03,242 INFO L158 Benchmark]: Boogie Preprocessor took 18.72ms. Allocated memory is still 211.8MB. Free memory was 188.0MB in the beginning and 187.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-08 09:00:03,243 INFO L158 Benchmark]: RCFGBuilder took 253.18ms. Allocated memory is still 211.8MB. Free memory was 186.8MB in the beginning and 176.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-08 09:00:03,243 INFO L158 Benchmark]: TraceAbstraction took 6311.23ms. Allocated memory was 211.8MB in the beginning and 290.5MB in the end (delta: 78.6MB). Free memory was 175.5MB in the beginning and 165.9MB in the end (delta: 9.6MB). Peak memory consumption was 89.6MB. Max. memory is 8.0GB. [2022-04-08 09:00:03,244 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 211.8MB. Free memory was 177.7MB in the beginning and 177.6MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 189.85ms. Allocated memory is still 211.8MB. Free memory was 161.5MB in the beginning and 188.5MB in the end (delta: -27.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.72ms. Allocated memory is still 211.8MB. Free memory was 188.0MB in the beginning and 187.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 253.18ms. Allocated memory is still 211.8MB. Free memory was 186.8MB in the beginning and 176.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 6311.23ms. Allocated memory was 211.8MB in the beginning and 290.5MB in the end (delta: 78.6MB). Free memory was 175.5MB in the beginning and 165.9MB in the end (delta: 9.6MB). Peak memory consumption was 89.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.2s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 144 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 143 mSDsluCounter, 247 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 150 mSDsCounter, 61 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 398 IncrementalHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 61 mSolverCounterUnsat, 97 mSDtfsCounter, 398 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 284 GetRequests, 177 SyntacticMatches, 8 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=6, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 6 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 81 PreInvPairs, 125 NumberOfFragments, 131 HoareAnnotationTreeSize, 81 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 21 FomulaSimplificationsInter, 142 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (len <= len / 4294967296 * 4294967296 + 4 && len / 4294967296 <= 0) && !(len / 4294967296 + 1 <= 0) - ProcedureContractResult [Line: 14]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 5]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 RESULT: Ultimate proved your program to be correct! [2022-04-08 09:00:03,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...