/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-fb4f59a-m [2022-04-28 07:37:14,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-28 07:37:14,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-28 07:37:14,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-28 07:37:14,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-28 07:37:14,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-28 07:37:14,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-28 07:37:14,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-28 07:37:14,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-28 07:37:14,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-28 07:37:14,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-28 07:37:14,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-28 07:37:14,333 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-28 07:37:14,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-28 07:37:14,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-28 07:37:14,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-28 07:37:14,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-28 07:37:14,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-28 07:37:14,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-28 07:37:14,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-28 07:37:14,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-28 07:37:14,348 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-28 07:37:14,356 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-28 07:37:14,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-28 07:37:14,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-28 07:37:14,357 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-28 07:37:14,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-28 07:37:14,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-28 07:37:14,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-28 07:37:14,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-28 07:37:14,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-28 07:37:14,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-28 07:37:14,358 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-28 07:37:14,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-28 07:37:14,359 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-28 07:37:14,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-28 07:37:14,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-28 07:37:14,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-28 07:37:14,359 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-28 07:37:14,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-28 07:37:14,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-28 07:37:14,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-28 07:37:14,359 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-28 07:37:14,359 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-28 07:37:14,359 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-28 07:37:14,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-28 07:37:14,360 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-28 07:37:14,360 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-28 07:37:14,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-28 07:37:14,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-28 07:37:14,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-28 07:37:14,560 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-28 07:37:14,560 INFO L275 PluginConnector]: CDTParser initialized [2022-04-28 07:37:14,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound50.c [2022-04-28 07:37:14,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12960cb43/d1d363922542422a85d200d90af9d5f1/FLAGbb527086c [2022-04-28 07:37:14,972 INFO L306 CDTParser]: Found 1 translation units. [2022-04-28 07:37:14,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound50.c [2022-04-28 07:37:14,976 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12960cb43/d1d363922542422a85d200d90af9d5f1/FLAGbb527086c [2022-04-28 07:37:15,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12960cb43/d1d363922542422a85d200d90af9d5f1 [2022-04-28 07:37:15,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-28 07:37:15,411 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-28 07:37:15,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-28 07:37:15,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-28 07:37:15,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-28 07:37:15,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.04 07:37:15" (1/1) ... [2022-04-28 07:37:15,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71905459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:37:15, skipping insertion in model container [2022-04-28 07:37:15,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.04 07:37:15" (1/1) ... [2022-04-28 07:37:15,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-28 07:37:15,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-28 07:37:15,597 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound50.c[454,467] [2022-04-28 07:37:15,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-28 07:37:15,611 INFO L203 MainTranslator]: Completed pre-run [2022-04-28 07:37:15,619 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps2-ll_unwindbound50.c[454,467] [2022-04-28 07:37:15,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-28 07:37:15,645 INFO L208 MainTranslator]: Completed translation [2022-04-28 07:37:15,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:37:15 WrapperNode [2022-04-28 07:37:15,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-28 07:37:15,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-28 07:37:15,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-28 07:37:15,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-28 07:37:15,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:37:15" (1/1) ... [2022-04-28 07:37:15,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:37:15" (1/1) ... [2022-04-28 07:37:15,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:37:15" (1/1) ... [2022-04-28 07:37:15,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:37:15" (1/1) ... [2022-04-28 07:37:15,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:37:15" (1/1) ... [2022-04-28 07:37:15,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:37:15" (1/1) ... [2022-04-28 07:37:15,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:37:15" (1/1) ... [2022-04-28 07:37:15,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-28 07:37:15,680 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-28 07:37:15,680 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-28 07:37:15,681 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-28 07:37:15,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:37:15" (1/1) ... [2022-04-28 07:37:15,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-28 07:37:15,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 07:37:15,722 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) [2022-04-28 07:37:15,727 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 [2022-04-28 07:37:15,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-28 07:37:15,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-28 07:37:15,765 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-28 07:37:15,765 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-28 07:37:15,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-28 07:37:15,765 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-28 07:37:15,765 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-28 07:37:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-28 07:37:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-28 07:37:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-28 07:37:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-28 07:37:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-28 07:37:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-28 07:37:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-28 07:37:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-28 07:37:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-28 07:37:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-28 07:37:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-28 07:37:15,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-28 07:37:15,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-28 07:37:15,811 INFO L234 CfgBuilder]: Building ICFG [2022-04-28 07:37:15,812 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-28 07:37:15,913 INFO L275 CfgBuilder]: Performing block encoding [2022-04-28 07:37:15,917 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-28 07:37:15,917 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-28 07:37:15,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 07:37:15 BoogieIcfgContainer [2022-04-28 07:37:15,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-28 07:37:15,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-28 07:37:15,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-28 07:37:15,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-28 07:37:15,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.04 07:37:15" (1/3) ... [2022-04-28 07:37:15,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6d9cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 07:37:15, skipping insertion in model container [2022-04-28 07:37:15,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:37:15" (2/3) ... [2022-04-28 07:37:15,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c6d9cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 07:37:15, skipping insertion in model container [2022-04-28 07:37:15,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 07:37:15" (3/3) ... [2022-04-28 07:37:15,923 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2-ll_unwindbound50.c [2022-04-28 07:37:15,932 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-28 07:37:15,932 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-28 07:37:15,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-28 07:37:15,966 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3db4391, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@599a2387 [2022-04-28 07:37:15,966 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-28 07:37:15,996 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 07:37:16,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-28 07:37:16,000 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 07:37:16,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 07:37:16,001 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 07:37:16,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 07:37:16,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2022-04-28 07:37:16,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 07:37:16,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1578253632] [2022-04-28 07:37:16,027 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 07:37:16,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 2 times [2022-04-28 07:37:16,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 07:37:16,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311140688] [2022-04-28 07:37:16,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 07:37:16,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 07:37:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 07:37:16,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-28 07:37:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 07:37:16,175 INFO L290 TraceCheckUtils]: 0: Hoare triple {30#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {25#true} is VALID [2022-04-28 07:37:16,176 INFO L290 TraceCheckUtils]: 1: Hoare triple {25#true} assume true; {25#true} is VALID [2022-04-28 07:37:16,176 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {25#true} {25#true} #54#return; {25#true} is VALID [2022-04-28 07:37:16,177 INFO L272 TraceCheckUtils]: 0: Hoare triple {25#true} call ULTIMATE.init(); {30#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-28 07:37:16,177 INFO L290 TraceCheckUtils]: 1: Hoare triple {30#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {25#true} is VALID [2022-04-28 07:37:16,177 INFO L290 TraceCheckUtils]: 2: Hoare triple {25#true} assume true; {25#true} is VALID [2022-04-28 07:37:16,179 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {25#true} {25#true} #54#return; {25#true} is VALID [2022-04-28 07:37:16,179 INFO L272 TraceCheckUtils]: 4: Hoare triple {25#true} call #t~ret6 := main(); {25#true} is VALID [2022-04-28 07:37:16,180 INFO L290 TraceCheckUtils]: 5: Hoare triple {25#true} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~k~0 := #t~nondet4;havoc #t~nondet4;~y~0 := 0;~x~0 := 0;~c~0 := 0; {25#true} is VALID [2022-04-28 07:37:16,180 INFO L290 TraceCheckUtils]: 6: Hoare triple {25#true} assume !true; {26#false} is VALID [2022-04-28 07:37:16,181 INFO L272 TraceCheckUtils]: 7: Hoare triple {26#false} call __VERIFIER_assert((if 0 == ~y~0 * ~y~0 - 2 * ~x~0 + ~y~0 then 1 else 0)); {26#false} is VALID [2022-04-28 07:37:16,181 INFO L290 TraceCheckUtils]: 8: Hoare triple {26#false} ~cond := #in~cond; {26#false} is VALID [2022-04-28 07:37:16,182 INFO L290 TraceCheckUtils]: 9: Hoare triple {26#false} assume 0 == ~cond; {26#false} is VALID [2022-04-28 07:37:16,182 INFO L290 TraceCheckUtils]: 10: Hoare triple {26#false} assume !false; {26#false} is VALID [2022-04-28 07:37:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 07:37:16,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 07:37:16,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311140688] [2022-04-28 07:37:16,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311140688] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 07:37:16,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 07:37:16,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-28 07:37:16,187 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 07:37:16,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1578253632] [2022-04-28 07:37:16,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1578253632] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 07:37:16,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 07:37:16,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-28 07:37:16,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121511909] [2022-04-28 07:37:16,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 07:37:16,191 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 [2022-04-28 07:37:16,192 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 07:37:16,194 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) [2022-04-28 07:37:16,212 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:37:16,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-28 07:37:16,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 07:37:16,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-28 07:37:16,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-28 07:37:16,236 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) 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) [2022-04-28 07:37:16,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:37:16,332 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-04-28 07:37:16,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-28 07:37:16,332 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 [2022-04-28 07:37:16,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 07:37:16,333 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) [2022-04-28 07:37:16,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2022-04-28 07:37:16,345 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) [2022-04-28 07:37:16,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2022-04-28 07:37:16,348 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 50 transitions. [2022-04-28 07:37:16,391 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 50 edges. 50 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:37:16,396 INFO L225 Difference]: With dead ends: 39 [2022-04-28 07:37:16,396 INFO L226 Difference]: Without dead ends: 18 [2022-04-28 07:37:16,398 INFO L412 NwaCegarLoop]: 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 [2022-04-28 07:37:16,400 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 07:37:16,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 07:37:16,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-28 07:37:16,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-04-28 07:37:16,419 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 07:37:16,419 INFO L82 GeneralOperation]: Start isEquivalent. First operand 18 states. Second operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:37:16,420 INFO L74 IsIncluded]: Start isIncluded. First operand 18 states. Second operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:37:16,420 INFO L87 Difference]: Start difference. First operand 18 states. Second operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:37:16,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:37:16,422 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-04-28 07:37:16,422 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-04-28 07:37:16,423 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:37:16,423 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:37:16,423 INFO L74 IsIncluded]: Start isIncluded. First operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 18 states. [2022-04-28 07:37:16,423 INFO L87 Difference]: Start difference. First operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 18 states. [2022-04-28 07:37:16,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:37:16,425 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-04-28 07:37:16,425 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-04-28 07:37:16,425 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:37:16,425 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:37:16,425 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 07:37:16,425 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 07:37:16,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:37:16,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-28 07:37:16,427 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-04-28 07:37:16,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 07:37:16,428 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-28 07:37:16,428 INFO L496 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) [2022-04-28 07:37:16,428 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 17 states and 19 transitions. [2022-04-28 07:37:16,444 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 19 edges. 19 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:37:16,445 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-28 07:37:16,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-28 07:37:16,445 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 07:37:16,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 07:37:16,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-28 07:37:16,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 07:37:16,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 07:37:16,446 INFO L85 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2022-04-28 07:37:16,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 07:37:16,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1084139661] [2022-04-28 07:37:16,447 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 07:37:16,447 INFO L85 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 2 times [2022-04-28 07:37:16,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 07:37:16,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779628786] [2022-04-28 07:37:16,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 07:37:16,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 07:37:16,459 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 07:37:16,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938894339] [2022-04-28 07:37:16,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 07:37:16,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 07:37:16,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 07:37:16,468 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) [2022-04-28 07:37:16,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-28 07:37:16,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-28 07:37:16,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 07:37:16,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-28 07:37:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 07:37:16,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 07:37:16,653 INFO L272 TraceCheckUtils]: 0: Hoare triple {181#true} call ULTIMATE.init(); {181#true} is VALID [2022-04-28 07:37:16,654 INFO L290 TraceCheckUtils]: 1: Hoare triple {181#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(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {189#(<= ~counter~0 0)} is VALID [2022-04-28 07:37:16,654 INFO L290 TraceCheckUtils]: 2: Hoare triple {189#(<= ~counter~0 0)} assume true; {189#(<= ~counter~0 0)} is VALID [2022-04-28 07:37:16,654 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {189#(<= ~counter~0 0)} {181#true} #54#return; {189#(<= ~counter~0 0)} is VALID [2022-04-28 07:37:16,655 INFO L272 TraceCheckUtils]: 4: Hoare triple {189#(<= ~counter~0 0)} call #t~ret6 := main(); {189#(<= ~counter~0 0)} is VALID [2022-04-28 07:37:16,656 INFO L290 TraceCheckUtils]: 5: Hoare triple {189#(<= ~counter~0 0)} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~k~0 := #t~nondet4;havoc #t~nondet4;~y~0 := 0;~x~0 := 0;~c~0 := 0; {189#(<= ~counter~0 0)} is VALID [2022-04-28 07:37:16,657 INFO L290 TraceCheckUtils]: 6: Hoare triple {189#(<= ~counter~0 0)} #t~post5 := ~counter~0;~counter~0 := 1 + #t~post5; {205#(<= |main_#t~post5| 0)} is VALID [2022-04-28 07:37:16,657 INFO L290 TraceCheckUtils]: 7: Hoare triple {205#(<= |main_#t~post5| 0)} assume !(#t~post5 < 50);havoc #t~post5; {182#false} is VALID [2022-04-28 07:37:16,657 INFO L272 TraceCheckUtils]: 8: Hoare triple {182#false} call __VERIFIER_assert((if 0 == ~y~0 * ~y~0 - 2 * ~x~0 + ~y~0 then 1 else 0)); {182#false} is VALID [2022-04-28 07:37:16,657 INFO L290 TraceCheckUtils]: 9: Hoare triple {182#false} ~cond := #in~cond; {182#false} is VALID [2022-04-28 07:37:16,658 INFO L290 TraceCheckUtils]: 10: Hoare triple {182#false} assume 0 == ~cond; {182#false} is VALID [2022-04-28 07:37:16,658 INFO L290 TraceCheckUtils]: 11: Hoare triple {182#false} assume !false; {182#false} is VALID [2022-04-28 07:37:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 07:37:16,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 07:37:16,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 07:37:16,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779628786] [2022-04-28 07:37:16,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 07:37:16,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938894339] [2022-04-28 07:37:16,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938894339] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 07:37:16,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 07:37:16,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-28 07:37:16,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 07:37:16,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1084139661] [2022-04-28 07:37:16,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1084139661] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 07:37:16,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 07:37:16,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-28 07:37:16,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917413485] [2022-04-28 07:37:16,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 07:37:16,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 07:37:16,662 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 07:37:16,662 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-04-28 07:37:16,672 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:37:16,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-28 07:37:16,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 07:37:16,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-28 07:37:16,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-28 07:37:16,673 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-04-28 07:37:16,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:37:16,714 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-04-28 07:37:16,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-28 07:37:16,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 07:37:16,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 07:37:16,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-04-28 07:37:16,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2022-04-28 07:37:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-04-28 07:37:16,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2022-04-28 07:37:16,723 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 28 transitions. [2022-04-28 07:37:16,742 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:37:16,744 INFO L225 Difference]: With dead ends: 26 [2022-04-28 07:37:16,744 INFO L226 Difference]: Without dead ends: 19 [2022-04-28 07:37:16,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-28 07:37:16,746 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 07:37:16,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 07:37:16,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-28 07:37:16,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-28 07:37:16,762 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 07:37:16,763 INFO L82 GeneralOperation]: Start isEquivalent. First operand 19 states. Second operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:37:16,763 INFO L74 IsIncluded]: Start isIncluded. First operand 19 states. Second operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:37:16,763 INFO L87 Difference]: Start difference. First operand 19 states. Second operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:37:16,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:37:16,764 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-28 07:37:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-28 07:37:16,764 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:37:16,764 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:37:16,765 INFO L74 IsIncluded]: Start isIncluded. First operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 19 states. [2022-04-28 07:37:16,765 INFO L87 Difference]: Start difference. First operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 19 states. [2022-04-28 07:37:16,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:37:16,766 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-28 07:37:16,766 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-28 07:37:16,766 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:37:16,766 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:37:16,766 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 07:37:16,766 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 07:37:16,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:37:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-28 07:37:16,767 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-04-28 07:37:16,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 07:37:16,767 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-28 07:37:16,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-04-28 07:37:16,768 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 19 states and 21 transitions. [2022-04-28 07:37:16,783 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 21 edges. 21 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:37:16,783 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-28 07:37:16,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-28 07:37:16,784 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 07:37:16,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 07:37:16,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-28 07:37:17,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 07:37:17,000 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 07:37:17,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 07:37:17,001 INFO L85 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2022-04-28 07:37:17,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 07:37:17,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [571958710] [2022-04-28 07:37:17,001 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 07:37:17,001 INFO L85 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 2 times [2022-04-28 07:37:17,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 07:37:17,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411440074] [2022-04-28 07:37:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 07:37:17,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 07:37:17,013 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 07:37:17,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890067241] [2022-04-28 07:37:17,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 07:37:17,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 07:37:17,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 07:37:17,019 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) [2022-04-28 07:37:17,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-28 07:37:17,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-28 07:37:17,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 07:37:17,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-28 07:37:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 07:37:17,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 07:37:17,144 INFO L272 TraceCheckUtils]: 0: Hoare triple {348#true} call ULTIMATE.init(); {348#true} is VALID [2022-04-28 07:37:17,144 INFO L290 TraceCheckUtils]: 1: Hoare triple {348#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(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {348#true} is VALID [2022-04-28 07:37:17,144 INFO L290 TraceCheckUtils]: 2: Hoare triple {348#true} assume true; {348#true} is VALID [2022-04-28 07:37:17,144 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {348#true} {348#true} #54#return; {348#true} is VALID [2022-04-28 07:37:17,145 INFO L272 TraceCheckUtils]: 4: Hoare triple {348#true} call #t~ret6 := main(); {348#true} is VALID [2022-04-28 07:37:17,145 INFO L290 TraceCheckUtils]: 5: Hoare triple {348#true} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~k~0 := #t~nondet4;havoc #t~nondet4;~y~0 := 0;~x~0 := 0;~c~0 := 0; {368#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-28 07:37:17,146 INFO L290 TraceCheckUtils]: 6: Hoare triple {368#(and (= main_~x~0 0) (= main_~y~0 0))} #t~post5 := ~counter~0;~counter~0 := 1 + #t~post5; {368#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-28 07:37:17,147 INFO L290 TraceCheckUtils]: 7: Hoare triple {368#(and (= main_~x~0 0) (= main_~y~0 0))} assume !!(#t~post5 < 50);havoc #t~post5; {368#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-28 07:37:17,147 INFO L272 TraceCheckUtils]: 8: Hoare triple {368#(and (= main_~x~0 0) (= main_~y~0 0))} call __VERIFIER_assert((if 0 == ~y~0 * ~y~0 - 2 * ~x~0 + ~y~0 then 1 else 0)); {378#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 07:37:17,148 INFO L290 TraceCheckUtils]: 9: Hoare triple {378#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {382#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 07:37:17,148 INFO L290 TraceCheckUtils]: 10: Hoare triple {382#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {349#false} is VALID [2022-04-28 07:37:17,148 INFO L290 TraceCheckUtils]: 11: Hoare triple {349#false} assume !false; {349#false} is VALID [2022-04-28 07:37:17,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 07:37:17,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 07:37:17,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 07:37:17,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411440074] [2022-04-28 07:37:17,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 07:37:17,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890067241] [2022-04-28 07:37:17,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890067241] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 07:37:17,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 07:37:17,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 07:37:17,150 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 07:37:17,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [571958710] [2022-04-28 07:37:17,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [571958710] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 07:37:17,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 07:37:17,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 07:37:17,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895265497] [2022-04-28 07:37:17,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 07:37:17,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 07:37:17,151 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 07:37:17,151 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:37:17,159 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:37:17,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-28 07:37:17,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 07:37:17,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-28 07:37:17,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-28 07:37:17,160 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:37:17,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:37:17,227 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-04-28 07:37:17,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-28 07:37:17,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 07:37:17,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 07:37:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:37:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 31 transitions. [2022-04-28 07:37:17,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:37:17,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 31 transitions. [2022-04-28 07:37:17,230 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 31 transitions. [2022-04-28 07:37:17,251 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 31 edges. 31 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:37:17,252 INFO L225 Difference]: With dead ends: 28 [2022-04-28 07:37:17,252 INFO L226 Difference]: Without dead ends: 25 [2022-04-28 07:37:17,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-28 07:37:17,253 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 07:37:17,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 07:37:17,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-28 07:37:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-28 07:37:17,283 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 07:37:17,283 INFO L82 GeneralOperation]: Start isEquivalent. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:37:17,283 INFO L74 IsIncluded]: Start isIncluded. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:37:17,284 INFO L87 Difference]: Start difference. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:37:17,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:37:17,285 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-04-28 07:37:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-28 07:37:17,285 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:37:17,285 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:37:17,286 INFO L74 IsIncluded]: Start isIncluded. First operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 25 states. [2022-04-28 07:37:17,286 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 25 states. [2022-04-28 07:37:17,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:37:17,287 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-04-28 07:37:17,287 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-28 07:37:17,287 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:37:17,288 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:37:17,288 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 07:37:17,288 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 07:37:17,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:37:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-04-28 07:37:17,289 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2022-04-28 07:37:17,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 07:37:17,289 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-04-28 07:37:17,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:37:17,289 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 25 states and 27 transitions. [2022-04-28 07:37:17,309 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 27 edges. 27 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:37:17,309 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-28 07:37:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-28 07:37:17,310 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 07:37:17,310 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 07:37:17,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-28 07:37:17,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-28 07:37:17,526 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 07:37:17,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 07:37:17,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2022-04-28 07:37:17,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 07:37:17,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [529473567] [2022-04-28 07:37:18,465 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=2, 3=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 1 QuantifierFreeResult [2022-04-28 07:37:18,468 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-04-28 07:37:18,472 INFO L85 PathProgramCache]: Analyzing trace with hash -691750508, now seen corresponding path program 1 times [2022-04-28 07:37:18,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 07:37:18,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002879559] [2022-04-28 07:37:18,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 07:37:18,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 07:37:18,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 07:37:18,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996839590] [2022-04-28 07:37:18,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 07:37:18,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 07:37:18,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 07:37:18,511 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) [2022-04-28 07:37:18,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-28 07:37:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 07:37:18,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-28 07:37:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 07:37:18,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 07:37:31,870 INFO L272 TraceCheckUtils]: 0: Hoare triple {546#true} call ULTIMATE.init(); {546#true} is VALID [2022-04-28 07:37:31,870 INFO L290 TraceCheckUtils]: 1: Hoare triple {546#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(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {554#(= ~counter~0 0)} is VALID [2022-04-28 07:37:31,871 INFO L290 TraceCheckUtils]: 2: Hoare triple {554#(= ~counter~0 0)} assume true; {554#(= ~counter~0 0)} is VALID [2022-04-28 07:37:31,871 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {554#(= ~counter~0 0)} {546#true} #54#return; {554#(= ~counter~0 0)} is VALID [2022-04-28 07:37:31,872 INFO L272 TraceCheckUtils]: 4: Hoare triple {554#(= ~counter~0 0)} call #t~ret6 := main(); {554#(= ~counter~0 0)} is VALID [2022-04-28 07:37:31,872 INFO L290 TraceCheckUtils]: 5: Hoare triple {554#(= ~counter~0 0)} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~k~0 := #t~nondet4;havoc #t~nondet4;~y~0 := 0;~x~0 := 0;~c~0 := 0; {567#(and (= main_~x~0 0) (= ~counter~0 0) (= main_~y~0 0))} is VALID [2022-04-28 07:37:31,874 INFO L290 TraceCheckUtils]: 6: Hoare triple {567#(and (= main_~x~0 0) (= ~counter~0 0) (= main_~y~0 0))} [58] L27-3-->L27-1_primed: Formula: (let ((.cse5 (= v_main_~x~0_13 v_main_~x~0_12)) (.cse6 (= |v_main_#t~post5_9| |v_main_#t~post5_7|)) (.cse7 (= v_main_~c~0_8 v_main_~c~0_7)) (.cse8 (= v_main_~y~0_13 v_main_~y~0_12)) (.cse3 (* (- 1) v_~counter~0_10)) (.cse2 (= (+ v_main_~y~0_13 (* v_main_~y~0_13 v_main_~y~0_13)) (* v_main_~x~0_13 2))) (.cse4 (* (- 1) v_main_~c~0_8))) (or (let ((.cse0 (div (+ (* (- 1) v_~counter~0_9) v_~counter~0_10 1) (- 2)))) (let ((.cse1 (* 2 .cse0))) (and (<= 0 .cse0) (= v_main_~y~0_12 (+ v_main_~y~0_13 .cse1 1)) (= (mod (+ v_~counter~0_9 v_~counter~0_10 1) 2) 0) (= v_main_~x~0_12 (+ (* 2 (* .cse0 .cse0)) v_main_~x~0_13 v_main_~y~0_13 (* 2 (* v_main_~y~0_13 .cse0)) (* 3 .cse0) 1)) (= v_main_~c~0_7 (+ v_main_~c~0_8 .cse1 1)) .cse2 (< .cse0 (+ (div (+ 49 .cse3) 2) 1)) (< .cse0 (+ (div (+ (- 1) v_main_~k~0_6 .cse4) 2) 1))))) (and (= v_~counter~0_10 v_~counter~0_9) .cse5 (= v_main_~k~0_6 v_main_~k~0_6) .cse6 .cse7 .cse8) (and (= v_~counter~0_9 v_~counter~0_10) (or (not .cse2) (not (< v_~counter~0_10 50)) (not (< v_main_~c~0_8 v_main_~k~0_6))) .cse5 .cse6 .cse7 .cse8) (let ((.cse9 (div (+ v_main_~y~0_13 (* (- 1) v_main_~y~0_12)) (- 2)))) (let ((.cse10 (* 2 .cse9))) (and (< 0 .cse9) (< .cse9 (+ 2 (div (+ .cse3 48) 2))) .cse2 (= v_main_~x~0_12 (+ (* (* .cse9 .cse9) 2) v_main_~x~0_13 (* 2 (* v_main_~y~0_13 .cse9)) .cse9)) (= v_main_~c~0_7 (+ v_main_~c~0_8 .cse10)) (= (mod (+ v_main_~y~0_13 v_main_~y~0_12) 2) 0) (= v_~counter~0_9 (+ .cse10 v_~counter~0_10)) (< .cse9 (+ 2 (div (+ (- 2) v_main_~k~0_6 .cse4) 2)))))))) InVars {~counter~0=v_~counter~0_10, main_~x~0=v_main_~x~0_13, main_~k~0=v_main_~k~0_6, main_~y~0=v_main_~y~0_13, main_~c~0=v_main_~c~0_8, main_#t~post5=|v_main_#t~post5_9|} OutVars{~counter~0=v_~counter~0_9, main_~x~0=v_main_~x~0_12, main_~k~0=v_main_~k~0_6, main_~y~0=v_main_~y~0_12, main_~c~0=v_main_~c~0_7, main_#t~post5=|v_main_#t~post5_7|} AuxVars[] AssignedVars[~counter~0, main_~x~0, main_~y~0, main_~c~0, main_#t~post5] {571#(or (and (= (mod (+ ~counter~0 1) 2) 0) (= main_~x~0 (+ (* (div (+ (* ~counter~0 (- 1)) 1) (- 2)) 3) (* (* (div (+ (* ~counter~0 (- 1)) 1) (- 2)) (div (+ (* ~counter~0 (- 1)) 1) (- 2))) 2) 1)) (< (div (+ (* ~counter~0 (- 1)) 1) (- 2)) 25) (= main_~y~0 (+ (* (div (+ (* ~counter~0 (- 1)) 1) (- 2)) 2) 1)) (<= 0 (div (+ (* ~counter~0 (- 1)) 1) (- 2)))) (and (= main_~x~0 0) (= ~counter~0 0) (= main_~y~0 0)) (and (< 0 (div (* (- 1) main_~y~0) (- 2))) (< (div (* (- 1) main_~y~0) (- 2)) 26) (= main_~x~0 (+ (div (* (- 1) main_~y~0) (- 2)) (* (* (div (* (- 1) main_~y~0) (- 2)) (div (* (- 1) main_~y~0) (- 2))) 2))) (= (mod main_~y~0 2) 0) (= ~counter~0 (* (div (* (- 1) main_~y~0) (- 2)) 2))))} is VALID [2022-04-28 07:37:31,877 INFO L290 TraceCheckUtils]: 7: Hoare triple {571#(or (and (= (mod (+ ~counter~0 1) 2) 0) (= main_~x~0 (+ (* (div (+ (* ~counter~0 (- 1)) 1) (- 2)) 3) (* (* (div (+ (* ~counter~0 (- 1)) 1) (- 2)) (div (+ (* ~counter~0 (- 1)) 1) (- 2))) 2) 1)) (< (div (+ (* ~counter~0 (- 1)) 1) (- 2)) 25) (= main_~y~0 (+ (* (div (+ (* ~counter~0 (- 1)) 1) (- 2)) 2) 1)) (<= 0 (div (+ (* ~counter~0 (- 1)) 1) (- 2)))) (and (= main_~x~0 0) (= ~counter~0 0) (= main_~y~0 0)) (and (< 0 (div (* (- 1) main_~y~0) (- 2))) (< (div (* (- 1) main_~y~0) (- 2)) 26) (= main_~x~0 (+ (div (* (- 1) main_~y~0) (- 2)) (* (* (div (* (- 1) main_~y~0) (- 2)) (div (* (- 1) main_~y~0) (- 2))) 2))) (= (mod main_~y~0 2) 0) (= ~counter~0 (* (div (* (- 1) main_~y~0) (- 2)) 2))))} [57] L27-1_primed-->L27-1: Formula: (and (= v_~counter~0_1 (+ |v_main_#t~post5_5| 1)) (= |v_main_#t~post5_5| v_~counter~0_2)) InVars {~counter~0=v_~counter~0_2} OutVars{~counter~0=v_~counter~0_1, main_#t~post5=|v_main_#t~post5_5|} AuxVars[] AssignedVars[~counter~0, main_#t~post5] {575#(or (and (<= |main_#t~post5| 0) (= main_~x~0 0) (= main_~y~0 0)) (and (<= (div (+ (- 1) main_~y~0) (- 2)) 0) (<= (+ |main_#t~post5| (* (div (+ (- 1) main_~y~0) (- 2)) 2)) 1) (exists ((aux_div_aux_mod_v_~counter~0_12_43_79 Int)) (and (< (+ (* aux_div_aux_mod_v_~counter~0_12_43_79 2) (* (div (+ (- 1) main_~y~0) (- 2)) 2)) 2) (= (+ (* aux_div_aux_mod_v_~counter~0_12_43_79 3) (* (* aux_div_aux_mod_v_~counter~0_12_43_79 aux_div_aux_mod_v_~counter~0_12_43_79) 2) 1) main_~x~0) (<= 0 (+ (* aux_div_aux_mod_v_~counter~0_12_43_79 2) (* (div (+ (- 1) main_~y~0) (- 2)) 2))))) (= (mod (+ main_~y~0 1) 2) 0) (< 0 (+ (div (+ (- 1) main_~y~0) (- 2)) 25))) (and (< 0 (div (* (- 1) main_~y~0) (- 2))) (<= |main_#t~post5| (* (div (* (- 1) main_~y~0) (- 2)) 2)) (< (div (* (- 1) main_~y~0) (- 2)) 26) (= main_~x~0 (+ (div (* (- 1) main_~y~0) (- 2)) (* (* (div (* (- 1) main_~y~0) (- 2)) (div (* (- 1) main_~y~0) (- 2))) 2))) (= (mod main_~y~0 2) 0)))} is VALID [2022-04-28 07:37:31,878 INFO L290 TraceCheckUtils]: 8: Hoare triple {575#(or (and (<= |main_#t~post5| 0) (= main_~x~0 0) (= main_~y~0 0)) (and (<= (div (+ (- 1) main_~y~0) (- 2)) 0) (<= (+ |main_#t~post5| (* (div (+ (- 1) main_~y~0) (- 2)) 2)) 1) (exists ((aux_div_aux_mod_v_~counter~0_12_43_79 Int)) (and (< (+ (* aux_div_aux_mod_v_~counter~0_12_43_79 2) (* (div (+ (- 1) main_~y~0) (- 2)) 2)) 2) (= (+ (* aux_div_aux_mod_v_~counter~0_12_43_79 3) (* (* aux_div_aux_mod_v_~counter~0_12_43_79 aux_div_aux_mod_v_~counter~0_12_43_79) 2) 1) main_~x~0) (<= 0 (+ (* aux_div_aux_mod_v_~counter~0_12_43_79 2) (* (div (+ (- 1) main_~y~0) (- 2)) 2))))) (= (mod (+ main_~y~0 1) 2) 0) (< 0 (+ (div (+ (- 1) main_~y~0) (- 2)) 25))) (and (< 0 (div (* (- 1) main_~y~0) (- 2))) (<= |main_#t~post5| (* (div (* (- 1) main_~y~0) (- 2)) 2)) (< (div (* (- 1) main_~y~0) (- 2)) 26) (= main_~x~0 (+ (div (* (- 1) main_~y~0) (- 2)) (* (* (div (* (- 1) main_~y~0) (- 2)) (div (* (- 1) main_~y~0) (- 2))) 2))) (= (mod main_~y~0 2) 0)))} assume !(#t~post5 < 50);havoc #t~post5; {579#(and (< (div (* (- 1) main_~y~0) (- 2)) 26) (= main_~x~0 (+ (div (* (- 1) main_~y~0) (- 2)) (* (* (div (* (- 1) main_~y~0) (- 2)) (div (* (- 1) main_~y~0) (- 2))) 2))) (= (mod main_~y~0 2) 0) (<= 50 (* (div (* (- 1) main_~y~0) (- 2)) 2)))} is VALID [2022-04-28 07:37:31,880 INFO L272 TraceCheckUtils]: 9: Hoare triple {579#(and (< (div (* (- 1) main_~y~0) (- 2)) 26) (= main_~x~0 (+ (div (* (- 1) main_~y~0) (- 2)) (* (* (div (* (- 1) main_~y~0) (- 2)) (div (* (- 1) main_~y~0) (- 2))) 2))) (= (mod main_~y~0 2) 0) (<= 50 (* (div (* (- 1) main_~y~0) (- 2)) 2)))} call __VERIFIER_assert((if 0 == ~y~0 * ~y~0 - 2 * ~x~0 + ~y~0 then 1 else 0)); {583#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 07:37:31,881 INFO L290 TraceCheckUtils]: 10: Hoare triple {583#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {587#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 07:37:31,881 INFO L290 TraceCheckUtils]: 11: Hoare triple {587#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {547#false} is VALID [2022-04-28 07:37:31,881 INFO L290 TraceCheckUtils]: 12: Hoare triple {547#false} assume !false; {547#false} is VALID [2022-04-28 07:37:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 07:37:31,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 07:37:31,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 07:37:31,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002879559] [2022-04-28 07:37:31,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 07:37:31,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996839590] [2022-04-28 07:37:31,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996839590] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 07:37:31,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 07:37:31,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-28 07:37:51,038 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 07:37:51,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [529473567] [2022-04-28 07:37:51,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [529473567] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 07:37:51,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 07:37:51,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-28 07:37:51,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112180817] [2022-04-28 07:37:51,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 07:37:51,039 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-28 07:37:51,039 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 07:37:51,039 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 10 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:37:55,853 WARN L143 InductivityCheck]: Transition 598#(and (exists ((v_main_~y~0_16 Int) (v_main_~x~0_16 Int) (v___VERIFIER_assert_~cond_BEFORE_RETURN_2 Int)) (and (or (and (= v_main_~y~0_16 (+ (* (div (+ (* ~counter~0 (- 1)) 2) (- 2)) 2) 1)) (= (mod ~counter~0 2) 0) (= v_main_~x~0_16 (+ (* (* (div (+ (* ~counter~0 (- 1)) 2) (- 2)) (div (+ (* ~counter~0 (- 1)) 2) (- 2))) 2) (* (div (+ (* ~counter~0 (- 1)) 2) (- 2)) 3) 1)) (<= 0 (div (+ (* ~counter~0 (- 1)) 2) (- 2)))) (and (= v_main_~y~0_16 0) (= ~counter~0 1) (= v_main_~x~0_16 0)) (and (< 0 (div (* (- 1) v_main_~y~0_16) (- 2))) (= v_main_~x~0_16 (+ (div (* (- 1) v_main_~y~0_16) (- 2)) (* 2 (* (div (* (- 1) v_main_~y~0_16) (- 2)) (div (* (- 1) v_main_~y~0_16) (- 2)))))) (= (mod v_main_~y~0_16 2) 0) (= ~counter~0 (+ (* (div (* (- 1) v_main_~y~0_16) (- 2)) 2) 1)))) (or (and (not (= (+ v_main_~y~0_16 (* v_main_~x~0_16 (- 2)) (* v_main_~y~0_16 v_main_~y~0_16)) 0)) (= v___VERIFIER_assert_~cond_BEFORE_RETURN_2 0)) (and (= v___VERIFIER_assert_~cond_BEFORE_RETURN_2 1) (= (+ v_main_~y~0_16 (* v_main_~x~0_16 (- 2)) (* v_main_~y~0_16 v_main_~y~0_16)) 0))) (or (and (= (+ (- 1) (* (- 2) main_~x~0) (* (+ (- 1) main_~y~0) (+ (- 1) main_~y~0)) (* main_~y~0 3)) 0) (= v___VERIFIER_assert_~cond_BEFORE_RETURN_2 1)) (and (not (= (+ (- 1) (* (- 2) main_~x~0) (* (+ (- 1) main_~y~0) (+ (- 1) main_~y~0)) (* main_~y~0 3)) 0)) (= v___VERIFIER_assert_~cond_BEFORE_RETURN_2 0))))) (< ~counter~0 51) (< main_~c~0 (+ main_~k~0 1))) ( _ , #t~post5 := ~counter~0;~counter~0 := 1 + #t~post5; , 575#(or (and (<= |main_#t~post5| 0) (= main_~x~0 0) (= main_~y~0 0)) (and (<= (div (+ (- 1) main_~y~0) (- 2)) 0) (<= (+ |main_#t~post5| (* (div (+ (- 1) main_~y~0) (- 2)) 2)) 1) (exists ((aux_div_aux_mod_v_~counter~0_12_43_79 Int)) (and (< (+ (* aux_div_aux_mod_v_~counter~0_12_43_79 2) (* (div (+ (- 1) main_~y~0) (- 2)) 2)) 2) (= (+ (* aux_div_aux_mod_v_~counter~0_12_43_79 3) (* (* aux_div_aux_mod_v_~counter~0_12_43_79 aux_div_aux_mod_v_~counter~0_12_43_79) 2) 1) main_~x~0) (<= 0 (+ (* aux_div_aux_mod_v_~counter~0_12_43_79 2) (* (div (+ (- 1) main_~y~0) (- 2)) 2))))) (= (mod (+ main_~y~0 1) 2) 0) (< 0 (+ (div (+ (- 1) main_~y~0) (- 2)) 25))) (and (< 0 (div (* (- 1) main_~y~0) (- 2))) (<= |main_#t~post5| (* (div (* (- 1) main_~y~0) (- 2)) 2)) (< (div (* (- 1) main_~y~0) (- 2)) 26) (= main_~x~0 (+ (div (* (- 1) main_~y~0) (- 2)) (* (* (div (* (- 1) main_~y~0) (- 2)) (div (* (- 1) main_~y~0) (- 2))) 2))) (= (mod main_~y~0 2) 0))) ) not inductive [2022-04-28 07:37:55,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-28 07:37:56,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 07:37:56,055 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: inductivity failed at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.InductivityCheck.evaluateResult(InductivityCheck.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.InductivityCheck.checkInductivity(InductivityCheck.java:103) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.InductivityCheck.(InductivityCheck.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.constructInterpolantAutomaton(BasicCegarLoop.java:335) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.constructRefinementAutomaton(AbstractCegarLoop.java:564) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-04-28 07:37:56,059 INFO L158 Benchmark]: Toolchain (without parser) took 40647.90ms. Allocated memory was 183.5MB in the beginning and 220.2MB in the end (delta: 36.7MB). Free memory was 134.5MB in the beginning and 158.8MB in the end (delta: -24.3MB). Peak memory consumption was 14.2MB. Max. memory is 8.0GB. [2022-04-28 07:37:56,059 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 183.5MB. Free memory is still 150.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-28 07:37:56,059 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.80ms. Allocated memory is still 183.5MB. Free memory was 134.4MB in the beginning and 159.7MB in the end (delta: -25.3MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. [2022-04-28 07:37:56,059 INFO L158 Benchmark]: Boogie Preprocessor took 33.91ms. Allocated memory is still 183.5MB. Free memory was 159.7MB in the beginning and 158.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-28 07:37:56,059 INFO L158 Benchmark]: RCFGBuilder took 238.09ms. Allocated memory is still 183.5MB. Free memory was 158.1MB in the beginning and 147.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-28 07:37:56,060 INFO L158 Benchmark]: TraceAbstraction took 40138.56ms. Allocated memory was 183.5MB in the beginning and 220.2MB in the end (delta: 36.7MB). Free memory was 147.1MB in the beginning and 158.8MB in the end (delta: -11.7MB). Peak memory consumption was 25.3MB. Max. memory is 8.0GB. [2022-04-28 07:37:56,061 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 0.09ms. Allocated memory is still 183.5MB. Free memory is still 150.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 232.80ms. Allocated memory is still 183.5MB. Free memory was 134.4MB in the beginning and 159.7MB in the end (delta: -25.3MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.91ms. Allocated memory is still 183.5MB. Free memory was 159.7MB in the beginning and 158.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 238.09ms. Allocated memory is still 183.5MB. Free memory was 158.1MB in the beginning and 147.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 40138.56ms. Allocated memory was 183.5MB in the beginning and 220.2MB in the end (delta: 36.7MB). Free memory was 147.1MB in the beginning and 158.8MB in the end (delta: -11.7MB). Peak memory consumption was 25.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: inductivity failed de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: inductivity failed: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.InductivityCheck.evaluateResult(InductivityCheck.java:145) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-04-28 07:37:56,160 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...