/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-e106359-m [2022-04-15 16:42:22,862 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-15 16:42:22,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-15 16:42:22,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-15 16:42:22,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-15 16:42:22,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-15 16:42:22,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-15 16:42:22,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-15 16:42:22,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-15 16:42:22,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-15 16:42:22,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-15 16:42:22,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-15 16:42:22,901 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-15 16:42:22,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-15 16:42:22,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-15 16:42:22,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-15 16:42:22,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-15 16:42:22,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-15 16:42:22,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-15 16:42:22,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-15 16:42:22,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-15 16:42:22,914 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-15 16:42:22,921 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-15 16:42:22,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-15 16:42:22,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-15 16:42:22,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-15 16:42:22,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-15 16:42:22,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-15 16:42:22,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-15 16:42:22,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-15 16:42:22,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-15 16:42:22,924 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-15 16:42:22,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-15 16:42:22,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-15 16:42:22,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-15 16:42:22,924 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-15 16:42:22,925 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-15 16:42:22,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 16:42:22,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-15 16:42:22,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-15 16:42:22,925 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-15 16:42:22,925 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-15 16:42:22,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-15 16:42:22,926 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-15 16:42:22,926 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-15 16:42:23,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-15 16:42:23,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-15 16:42:23,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-15 16:42:23,152 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-15 16:42:23,154 INFO L275 PluginConnector]: CDTParser initialized [2022-04-15 16:42:23,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_unwindbound5.c [2022-04-15 16:42:23,207 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cf8db8fb/26694b4fed414355b26bd3e3fb5c1876/FLAGeee3a2b4d [2022-04-15 16:42:23,556 INFO L306 CDTParser]: Found 1 translation units. [2022-04-15 16:42:23,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps3-ll_unwindbound5.c [2022-04-15 16:42:23,561 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cf8db8fb/26694b4fed414355b26bd3e3fb5c1876/FLAGeee3a2b4d [2022-04-15 16:42:23,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2cf8db8fb/26694b4fed414355b26bd3e3fb5c1876 [2022-04-15 16:42:23,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-15 16:42:23,573 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-15 16:42:23,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-15 16:42:23,579 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-15 16:42:23,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-15 16:42:23,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 04:42:23" (1/1) ... [2022-04-15 16:42:23,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43386bf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:42:23, skipping insertion in model container [2022-04-15 16:42:23,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 04:42:23" (1/1) ... [2022-04-15 16:42:23,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-15 16:42:23,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-15 16:42:23,743 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/ps3-ll_unwindbound5.c[458,471] [2022-04-15 16:42:23,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 16:42:23,768 INFO L203 MainTranslator]: Completed pre-run [2022-04-15 16:42:23,776 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/ps3-ll_unwindbound5.c[458,471] [2022-04-15 16:42:23,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 16:42:23,790 INFO L208 MainTranslator]: Completed translation [2022-04-15 16:42:23,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:42:23 WrapperNode [2022-04-15 16:42:23,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-15 16:42:23,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-15 16:42:23,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-15 16:42:23,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-15 16:42:23,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:42:23" (1/1) ... [2022-04-15 16:42:23,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:42:23" (1/1) ... [2022-04-15 16:42:23,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:42:23" (1/1) ... [2022-04-15 16:42:23,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:42:23" (1/1) ... [2022-04-15 16:42:23,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:42:23" (1/1) ... [2022-04-15 16:42:23,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:42:23" (1/1) ... [2022-04-15 16:42:23,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:42:23" (1/1) ... [2022-04-15 16:42:23,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-15 16:42:23,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-15 16:42:23,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-15 16:42:23,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-15 16:42:23,824 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:42:23" (1/1) ... [2022-04-15 16:42:23,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 16:42:23,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 16:42:23,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-15 16:42:23,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-15 16:42:23,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-15 16:42:23,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-15 16:42:23,885 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-15 16:42:23,885 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-15 16:42:23,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-15 16:42:23,886 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-15 16:42:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-15 16:42:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-15 16:42:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-15 16:42:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-15 16:42:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-04-15 16:42:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-15 16:42:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-15 16:42:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-15 16:42:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-15 16:42:23,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-15 16:42:23,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-15 16:42:23,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-15 16:42:23,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-15 16:42:23,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-15 16:42:23,934 INFO L234 CfgBuilder]: Building ICFG [2022-04-15 16:42:23,935 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-15 16:42:24,035 INFO L275 CfgBuilder]: Performing block encoding [2022-04-15 16:42:24,041 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-15 16:42:24,041 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-15 16:42:24,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:42:24 BoogieIcfgContainer [2022-04-15 16:42:24,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-15 16:42:24,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-15 16:42:24,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-15 16:42:24,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-15 16:42:24,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 04:42:23" (1/3) ... [2022-04-15 16:42:24,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7f60fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 04:42:24, skipping insertion in model container [2022-04-15 16:42:24,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:42:23" (2/3) ... [2022-04-15 16:42:24,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7f60fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 04:42:24, skipping insertion in model container [2022-04-15 16:42:24,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:42:24" (3/3) ... [2022-04-15 16:42:24,049 INFO L111 eAbstractionObserver]: Analyzing ICFG ps3-ll_unwindbound5.c [2022-04-15 16:42:24,053 INFO L202 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-15 16:42:24,053 INFO L161 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-15 16:42:24,088 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-15 16:42:24,093 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-15 16:42:24,093 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-15 16:42:24,106 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) [2022-04-15 16:42:24,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-15 16:42:24,112 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 16:42:24,113 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 16:42:24,113 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 16:42:24,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 16:42:24,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2022-04-15 16:42:24,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 16:42:24,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [311028636] [2022-04-15 16:42:24,162 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 16:42:24,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 2 times [2022-04-15 16:42:24,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 16:42:24,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358648977] [2022-04-15 16:42:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 16:42:24,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 16:42:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:42:24,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-15 16:42:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:42:24,394 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 [2022-04-15 16:42:24,394 INFO L290 TraceCheckUtils]: 1: Hoare triple {25#true} assume true; {25#true} is VALID [2022-04-15 16:42:24,394 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {25#true} {25#true} #54#return; {25#true} is VALID [2022-04-15 16:42:24,396 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 [2022-04-15 16:42:24,397 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 [2022-04-15 16:42:24,397 INFO L290 TraceCheckUtils]: 2: Hoare triple {25#true} assume true; {25#true} is VALID [2022-04-15 16:42:24,397 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {25#true} {25#true} #54#return; {25#true} is VALID [2022-04-15 16:42:24,397 INFO L272 TraceCheckUtils]: 4: Hoare triple {25#true} call #t~ret6 := main(); {25#true} is VALID [2022-04-15 16:42:24,398 INFO L290 TraceCheckUtils]: 5: Hoare triple {25#true} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -32768 <= #t~nondet4 && #t~nondet4 <= 32767;~k~0 := #t~nondet4;havoc #t~nondet4;~y~0 := 0;~x~0 := 0;~c~0 := 0; {25#true} is VALID [2022-04-15 16:42:24,398 INFO L290 TraceCheckUtils]: 6: Hoare triple {25#true} assume !true; {26#false} is VALID [2022-04-15 16:42:24,399 INFO L272 TraceCheckUtils]: 7: Hoare triple {26#false} call __VERIFIER_assert((if 0 == 6 * ~x~0 - 2 * ~y~0 * ~y~0 * ~y~0 - 3 * ~y~0 * ~y~0 - ~y~0 then 1 else 0)); {26#false} is VALID [2022-04-15 16:42:24,399 INFO L290 TraceCheckUtils]: 8: Hoare triple {26#false} ~cond := #in~cond; {26#false} is VALID [2022-04-15 16:42:24,399 INFO L290 TraceCheckUtils]: 9: Hoare triple {26#false} assume 0 == ~cond; {26#false} is VALID [2022-04-15 16:42:24,399 INFO L290 TraceCheckUtils]: 10: Hoare triple {26#false} assume !false; {26#false} is VALID [2022-04-15 16:42:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 16:42:24,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 16:42:24,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358648977] [2022-04-15 16:42:24,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358648977] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:42:24,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:42:24,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-15 16:42:24,404 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 16:42:24,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [311028636] [2022-04-15 16:42:24,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [311028636] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:42:24,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:42:24,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-15 16:42:24,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068409900] [2022-04-15 16:42:24,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 16:42:24,410 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 [2022-04-15 16:42:24,411 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 16:42:24,414 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) [2022-04-15 16:42:24,429 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:42:24,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-15 16:42:24,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 16:42:24,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-15 16:42:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-15 16:42:24,454 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) [2022-04-15 16:42:24,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:42:24,548 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-04-15 16:42:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-15 16:42:24,552 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 [2022-04-15 16:42:24,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 16:42:24,553 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) [2022-04-15 16:42:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2022-04-15 16:42:24,560 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) [2022-04-15 16:42:24,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2022-04-15 16:42:24,563 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 50 transitions. [2022-04-15 16:42:24,618 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 50 edges. 50 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:42:24,625 INFO L225 Difference]: With dead ends: 39 [2022-04-15 16:42:24,625 INFO L226 Difference]: Without dead ends: 18 [2022-04-15 16:42:24,627 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-15 16:42:24,631 INFO L913 BasicCegarLoop]: 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 [2022-04-15 16:42:24,632 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 16:42:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-15 16:42:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-04-15 16:42:24,658 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 16:42:24,658 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) [2022-04-15 16:42:24,659 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) [2022-04-15 16:42:24,659 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) [2022-04-15 16:42:24,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:42:24,663 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-04-15 16:42:24,663 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-04-15 16:42:24,663 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:42:24,663 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:42:24,664 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. [2022-04-15 16:42:24,664 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. [2022-04-15 16:42:24,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:42:24,666 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-04-15 16:42:24,667 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-04-15 16:42:24,667 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:42:24,667 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:42:24,667 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 16:42:24,667 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 16:42:24,668 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) [2022-04-15 16:42:24,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-15 16:42:24,670 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-04-15 16:42:24,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 16:42:24,671 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-15 16:42:24,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 16:42:24,671 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 17 states and 19 transitions. [2022-04-15 16:42:24,692 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 19 edges. 19 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:42:24,692 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-15 16:42:24,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-15 16:42:24,693 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 16:42:24,693 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 16:42:24,694 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-15 16:42:24,694 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 16:42:24,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 16:42:24,695 INFO L85 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2022-04-15 16:42:24,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 16:42:24,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1098140317] [2022-04-15 16:42:24,697 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 16:42:24,697 INFO L85 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 2 times [2022-04-15 16:42:24,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 16:42:24,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222549782] [2022-04-15 16:42:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 16:42:24,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 16:42:24,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 16:42:24,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335355936] [2022-04-15 16:42:24,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 16:42:24,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 16:42:24,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 16:42:24,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 16:42:24,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-15 16:42:24,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 16:42:24,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 16:42:24,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-15 16:42:24,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:42:24,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 16:42:24,906 INFO L272 TraceCheckUtils]: 0: Hoare triple {181#true} call ULTIMATE.init(); {181#true} is VALID [2022-04-15 16:42:24,907 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 [2022-04-15 16:42:24,907 INFO L290 TraceCheckUtils]: 2: Hoare triple {189#(<= ~counter~0 0)} assume true; {189#(<= ~counter~0 0)} is VALID [2022-04-15 16:42:24,908 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {189#(<= ~counter~0 0)} {181#true} #54#return; {189#(<= ~counter~0 0)} is VALID [2022-04-15 16:42:24,908 INFO L272 TraceCheckUtils]: 4: Hoare triple {189#(<= ~counter~0 0)} call #t~ret6 := main(); {189#(<= ~counter~0 0)} is VALID [2022-04-15 16:42:24,909 INFO L290 TraceCheckUtils]: 5: Hoare triple {189#(<= ~counter~0 0)} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -32768 <= #t~nondet4 && #t~nondet4 <= 32767;~k~0 := #t~nondet4;havoc #t~nondet4;~y~0 := 0;~x~0 := 0;~c~0 := 0; {189#(<= ~counter~0 0)} is VALID [2022-04-15 16:42:24,909 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 [2022-04-15 16:42:24,910 INFO L290 TraceCheckUtils]: 7: Hoare triple {205#(<= |main_#t~post5| 0)} assume !(#t~post5 < 5);havoc #t~post5; {182#false} is VALID [2022-04-15 16:42:24,910 INFO L272 TraceCheckUtils]: 8: Hoare triple {182#false} call __VERIFIER_assert((if 0 == 6 * ~x~0 - 2 * ~y~0 * ~y~0 * ~y~0 - 3 * ~y~0 * ~y~0 - ~y~0 then 1 else 0)); {182#false} is VALID [2022-04-15 16:42:24,911 INFO L290 TraceCheckUtils]: 9: Hoare triple {182#false} ~cond := #in~cond; {182#false} is VALID [2022-04-15 16:42:24,911 INFO L290 TraceCheckUtils]: 10: Hoare triple {182#false} assume 0 == ~cond; {182#false} is VALID [2022-04-15 16:42:24,911 INFO L290 TraceCheckUtils]: 11: Hoare triple {182#false} assume !false; {182#false} is VALID [2022-04-15 16:42:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 16:42:24,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 16:42:24,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 16:42:24,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222549782] [2022-04-15 16:42:24,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 16:42:24,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335355936] [2022-04-15 16:42:24,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335355936] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:42:24,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:42:24,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-15 16:42:24,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 16:42:24,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1098140317] [2022-04-15 16:42:24,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1098140317] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:42:24,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:42:24,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-15 16:42:24,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952253795] [2022-04-15 16:42:24,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 16:42:24,916 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 [2022-04-15 16:42:24,916 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 16:42:24,916 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) [2022-04-15 16:42:24,927 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:42:24,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-15 16:42:24,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 16:42:24,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-15 16:42:24,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-15 16:42:24,929 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) [2022-04-15 16:42:24,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:42:24,971 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-04-15 16:42:24,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-15 16:42:24,972 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 [2022-04-15 16:42:24,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 16:42:24,972 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) [2022-04-15 16:42:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2022-04-15 16:42:24,974 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) [2022-04-15 16:42:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2022-04-15 16:42:24,976 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 28 transitions. [2022-04-15 16:42:24,998 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:42:24,999 INFO L225 Difference]: With dead ends: 26 [2022-04-15 16:42:24,999 INFO L226 Difference]: Without dead ends: 19 [2022-04-15 16:42:25,000 INFO L912 BasicCegarLoop]: 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 [2022-04-15 16:42:25,001 INFO L913 BasicCegarLoop]: 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 [2022-04-15 16:42:25,002 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 16:42:25,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-15 16:42:25,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-15 16:42:25,010 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 16:42:25,010 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) [2022-04-15 16:42:25,011 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) [2022-04-15 16:42:25,011 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) [2022-04-15 16:42:25,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:42:25,012 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-15 16:42:25,013 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-15 16:42:25,013 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:42:25,013 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:42:25,013 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. [2022-04-15 16:42:25,013 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. [2022-04-15 16:42:25,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:42:25,015 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-15 16:42:25,015 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-15 16:42:25,015 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:42:25,015 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:42:25,015 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 16:42:25,016 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 16:42:25,016 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) [2022-04-15 16:42:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-15 16:42:25,017 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-04-15 16:42:25,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 16:42:25,017 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-15 16:42:25,018 INFO L479 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) [2022-04-15 16:42:25,018 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 19 states and 21 transitions. [2022-04-15 16:42:25,036 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 21 edges. 21 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:42:25,037 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-15 16:42:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-15 16:42:25,037 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 16:42:25,037 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 16:42:25,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-15 16:42:25,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 16:42:25,251 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 16:42:25,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 16:42:25,252 INFO L85 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2022-04-15 16:42:25,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 16:42:25,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1259271061] [2022-04-15 16:42:25,253 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 16:42:25,254 INFO L85 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 2 times [2022-04-15 16:42:25,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 16:42:25,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069470270] [2022-04-15 16:42:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 16:42:25,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 16:42:25,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 16:42:25,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255806163] [2022-04-15 16:42:25,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 16:42:25,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 16:42:25,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 16:42:25,276 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 16:42:25,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-15 16:42:25,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 16:42:25,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 16:42:25,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-15 16:42:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:42:25,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 16:42:25,409 INFO L272 TraceCheckUtils]: 0: Hoare triple {348#true} call ULTIMATE.init(); {348#true} is VALID [2022-04-15 16:42:25,410 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 [2022-04-15 16:42:25,410 INFO L290 TraceCheckUtils]: 2: Hoare triple {348#true} assume true; {348#true} is VALID [2022-04-15 16:42:25,410 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {348#true} {348#true} #54#return; {348#true} is VALID [2022-04-15 16:42:25,410 INFO L272 TraceCheckUtils]: 4: Hoare triple {348#true} call #t~ret6 := main(); {348#true} is VALID [2022-04-15 16:42:25,411 INFO L290 TraceCheckUtils]: 5: Hoare triple {348#true} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -32768 <= #t~nondet4 && #t~nondet4 <= 32767;~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 [2022-04-15 16:42:25,411 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 [2022-04-15 16:42:25,412 INFO L290 TraceCheckUtils]: 7: Hoare triple {368#(and (= main_~x~0 0) (= main_~y~0 0))} assume !!(#t~post5 < 5);havoc #t~post5; {368#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-15 16:42:25,413 INFO L272 TraceCheckUtils]: 8: Hoare triple {368#(and (= main_~x~0 0) (= main_~y~0 0))} call __VERIFIER_assert((if 0 == 6 * ~x~0 - 2 * ~y~0 * ~y~0 * ~y~0 - 3 * ~y~0 * ~y~0 - ~y~0 then 1 else 0)); {378#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 16:42:25,413 INFO L290 TraceCheckUtils]: 9: Hoare triple {378#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {382#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 16:42:25,414 INFO L290 TraceCheckUtils]: 10: Hoare triple {382#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {349#false} is VALID [2022-04-15 16:42:25,414 INFO L290 TraceCheckUtils]: 11: Hoare triple {349#false} assume !false; {349#false} is VALID [2022-04-15 16:42:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 16:42:25,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 16:42:25,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 16:42:25,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069470270] [2022-04-15 16:42:25,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 16:42:25,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255806163] [2022-04-15 16:42:25,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255806163] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:42:25,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:42:25,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 16:42:25,415 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 16:42:25,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1259271061] [2022-04-15 16:42:25,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1259271061] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:42:25,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:42:25,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 16:42:25,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128354150] [2022-04-15 16:42:25,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 16:42:25,416 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 [2022-04-15 16:42:25,417 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 16:42:25,417 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) [2022-04-15 16:42:25,427 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:42:25,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-15 16:42:25,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 16:42:25,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-15 16:42:25,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-15 16:42:25,428 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) [2022-04-15 16:42:25,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:42:25,528 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-04-15 16:42:25,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-15 16:42:25,528 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 [2022-04-15 16:42:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 16:42:25,529 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) [2022-04-15 16:42:25,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 31 transitions. [2022-04-15 16:42:25,534 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) [2022-04-15 16:42:25,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 31 transitions. [2022-04-15 16:42:25,538 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 31 transitions. [2022-04-15 16:42:25,563 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 31 edges. 31 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:42:25,565 INFO L225 Difference]: With dead ends: 28 [2022-04-15 16:42:25,565 INFO L226 Difference]: Without dead ends: 25 [2022-04-15 16:42:25,566 INFO L912 BasicCegarLoop]: 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 [2022-04-15 16:42:25,576 INFO L913 BasicCegarLoop]: 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 [2022-04-15 16:42:25,577 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 16:42:25,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-15 16:42:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-15 16:42:25,596 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 16:42:25,597 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) [2022-04-15 16:42:25,599 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) [2022-04-15 16:42:25,600 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) [2022-04-15 16:42:25,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:42:25,602 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-04-15 16:42:25,603 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-15 16:42:25,603 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:42:25,603 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:42:25,603 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. [2022-04-15 16:42:25,604 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. [2022-04-15 16:42:25,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:42:25,608 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-04-15 16:42:25,608 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-15 16:42:25,609 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:42:25,609 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:42:25,609 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 16:42:25,609 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 16:42:25,609 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) [2022-04-15 16:42:25,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-04-15 16:42:25,610 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2022-04-15 16:42:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 16:42:25,611 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-04-15 16:42:25,611 INFO L479 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) [2022-04-15 16:42:25,611 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 25 states and 27 transitions. [2022-04-15 16:42:25,637 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 27 edges. 27 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:42:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-15 16:42:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-15 16:42:25,639 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 16:42:25,639 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 16:42:25,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-15 16:42:25,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-15 16:42:25,864 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 16:42:25,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 16:42:25,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2022-04-15 16:42:25,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 16:42:25,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1648766039]