/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 16:55:31,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 16:55:31,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 16:55:31,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 16:55:31,845 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 16:55:31,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 16:55:31,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 16:55:31,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 16:55:31,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 16:55:31,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 16:55:31,851 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 16:55:31,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 16:55:31,854 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 16:55:31,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 16:55:31,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 16:55:31,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 16:55:31,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 16:55:31,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 16:55:31,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 16:55:31,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 16:55:31,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 16:55:31,868 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 16:55:31,877 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 16:55:31,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 16:55:31,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 16:55:31,878 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 16:55:31,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 16:55:31,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 16:55:31,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 16:55:31,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 16:55:31,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 16:55:31,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 16:55:31,878 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 16:55:31,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 16:55:31,879 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 16:55:31,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 16:55:31,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 16:55:31,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 16:55:31,879 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 16:55:31,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 16:55:31,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:55:31,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 16:55:31,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 16:55:31,879 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 16:55:31,879 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 16:55:31,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 16:55:31,880 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 16:55:31,880 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 16:55:32,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 16:55:32,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 16:55:32,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 16:55:32,095 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 16:55:32,096 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 16:55:32,097 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound100.c [2022-04-06 16:55:32,146 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6410fc8e/6a940b1c93d64ec59b3005673c691671/FLAGd8097ff95 [2022-04-06 16:55:32,455 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 16:55:32,455 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound100.c [2022-04-06 16:55:32,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6410fc8e/6a940b1c93d64ec59b3005673c691671/FLAGd8097ff95 [2022-04-06 16:55:32,885 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6410fc8e/6a940b1c93d64ec59b3005673c691671 [2022-04-06 16:55:32,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 16:55:32,888 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 16:55:32,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 16:55:32,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 16:55:32,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 16:55:32,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:55:32" (1/1) ... [2022-04-06 16:55:32,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7611b629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:55:32, skipping insertion in model container [2022-04-06 16:55:32,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:55:32" (1/1) ... [2022-04-06 16:55:32,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 16:55:32,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 16:55:33,015 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/geo3-ll_unwindbound100.c[525,538] [2022-04-06 16:55:33,026 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:55:33,031 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 16:55:33,037 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/geo3-ll_unwindbound100.c[525,538] [2022-04-06 16:55:33,040 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:55:33,050 INFO L208 MainTranslator]: Completed translation [2022-04-06 16:55:33,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:55:33 WrapperNode [2022-04-06 16:55:33,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 16:55:33,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 16:55:33,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 16:55:33,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 16:55:33,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:55:33" (1/1) ... [2022-04-06 16:55:33,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:55:33" (1/1) ... [2022-04-06 16:55:33,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:55:33" (1/1) ... [2022-04-06 16:55:33,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:55:33" (1/1) ... [2022-04-06 16:55:33,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:55:33" (1/1) ... [2022-04-06 16:55:33,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:55:33" (1/1) ... [2022-04-06 16:55:33,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:55:33" (1/1) ... [2022-04-06 16:55:33,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 16:55:33,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 16:55:33,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 16:55:33,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 16:55:33,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:55:33" (1/1) ... [2022-04-06 16:55:33,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:55:33,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:55:33,094 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) [2022-04-06 16:55:33,108 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 [2022-04-06 16:55:33,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 16:55:33,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 16:55:33,120 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 16:55:33,120 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 16:55:33,120 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 16:55:33,120 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 16:55:33,120 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 16:55:33,120 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 16:55:33,120 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 16:55:33,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 16:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 16:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 16:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 16:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 16:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 16:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 16:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 16:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 16:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 16:55:33,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 16:55:33,165 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 16:55:33,166 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 16:55:33,284 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 16:55:33,288 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 16:55:33,288 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 16:55:33,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:55:33 BoogieIcfgContainer [2022-04-06 16:55:33,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 16:55:33,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 16:55:33,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 16:55:33,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 16:55:33,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:55:32" (1/3) ... [2022-04-06 16:55:33,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469f12c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:55:33, skipping insertion in model container [2022-04-06 16:55:33,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:55:33" (2/3) ... [2022-04-06 16:55:33,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469f12c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:55:33, skipping insertion in model container [2022-04-06 16:55:33,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:55:33" (3/3) ... [2022-04-06 16:55:33,307 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound100.c [2022-04-06 16:55:33,311 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 16:55:33,311 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 16:55:33,356 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 16:55:33,361 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 [2022-04-06 16:55:33,361 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 16:55:33,369 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) [2022-04-06 16:55:33,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 16:55:33,374 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:55:33,374 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:55:33,374 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:55:33,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:55:33,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2022-04-06 16:55:33,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:55:33,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [86137563] [2022-04-06 16:55:33,390 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:55:33,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 2 times [2022-04-06 16:55:33,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:55:33,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175733999] [2022-04-06 16:55:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:55:33,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:55:33,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:55:33,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806781421] [2022-04-06 16:55:33,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:55:33,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:55:33,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:55:33,480 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) [2022-04-06 16:55:33,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 16:55:33,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:55:33,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:55:33,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2022-04-06 16:55:33,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:55:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 16:55:33,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:55:33,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:55:33,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175733999] [2022-04-06 16:55:33,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:55:33,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806781421] [2022-04-06 16:55:33,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806781421] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:55:33,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:55:33,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-06 16:55:33,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:55:33,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [86137563] [2022-04-06 16:55:33,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [86137563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:55:33,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:55:33,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-06 16:55:33,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998721407] [2022-04-06 16:55:33,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:55:33,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-04-06 16:55:33,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:55:33,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-04-06 16:55:33,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-06 16:55:33,638 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 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-04-06 16:55:33,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:55:33,653 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-04-06 16:55:33,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-04-06 16:55:33,654 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2022-04-06 16:55:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:55:33,662 INFO L225 Difference]: With dead ends: 38 [2022-04-06 16:55:33,662 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 16:55:33,664 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-06 16:55:33,670 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:55:33,671 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:55:33,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 16:55:33,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 16:55:33,701 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) [2022-04-06 16:55:33,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-06 16:55:33,703 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-04-06 16:55:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:55:33,704 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-06 16:55:33,704 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-04-06 16:55:33,704 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-06 16:55:33,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 16:55:33,705 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:55:33,705 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:55:33,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 16:55:33,912 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-04-06 16:55:33,912 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:55:33,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:55:33,913 INFO L85 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2022-04-06 16:55:33,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:55:33,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [655694143] [2022-04-06 16:55:33,914 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:55:33,914 INFO L85 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 2 times [2022-04-06 16:55:33,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:55:33,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175876614] [2022-04-06 16:55:33,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:55:33,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:55:33,921 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:55:33,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037055160] [2022-04-06 16:55:33,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:55:33,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:55:33,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:55:33,923 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) [2022-04-06 16:55:33,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 16:55:33,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:55:33,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:55:33,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 16:55:33,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:55:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 16:55:34,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:55:34,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:55:34,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175876614] [2022-04-06 16:55:34,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:55:34,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037055160] [2022-04-06 16:55:34,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037055160] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:55:34,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:55:34,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 16:55:34,025 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:55:34,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [655694143] [2022-04-06 16:55:34,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [655694143] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:55:34,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:55:34,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 16:55:34,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98771650] [2022-04-06 16:55:34,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:55:34,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 16:55:34,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:55:34,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 16:55:34,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 16:55:34,027 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) [2022-04-06 16:55:34,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:55:34,036 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-04-06 16:55:34,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 16:55:34,036 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 [2022-04-06 16:55:34,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:55:34,037 INFO L225 Difference]: With dead ends: 26 [2022-04-06 16:55:34,037 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 16:55:34,037 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 [2022-04-06 16:55:34,038 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 [2022-04-06 16:55:34,039 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] [2022-04-06 16:55:34,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 16:55:34,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-06 16:55:34,042 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) [2022-04-06 16:55:34,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-06 16:55:34,042 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-04-06 16:55:34,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:55:34,043 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-06 16:55:34,043 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) [2022-04-06 16:55:34,043 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-06 16:55:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 16:55:34,043 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:55:34,043 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:55:34,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 16:55:34,244 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,SelfDestructingSolverStorable1 [2022-04-06 16:55:34,244 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:55:34,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:55:34,245 INFO L85 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2022-04-06 16:55:34,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:55:34,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1584324196] [2022-04-06 16:55:34,246 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:55:34,246 INFO L85 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 2 times [2022-04-06 16:55:34,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:55:34,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34780165] [2022-04-06 16:55:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:55:34,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:55:34,254 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:55:34,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387739975] [2022-04-06 16:55:34,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:55:34,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:55:34,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:55:34,261 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) [2022-04-06 16:55:34,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 16:55:34,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:55:34,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:55:34,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 16:55:34,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:55:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 16:55:34,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:55:34,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:55:34,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34780165] [2022-04-06 16:55:34,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:55:34,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387739975] [2022-04-06 16:55:34,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387739975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:55:34,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:55:34,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:55:34,394 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:55:34,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1584324196] [2022-04-06 16:55:34,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1584324196] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:55:34,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:55:34,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:55:34,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985429445] [2022-04-06 16:55:34,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:55:34,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:55:34,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:55:34,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:55:34,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:55:34,395 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) [2022-04-06 16:55:34,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:55:34,430 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-04-06 16:55:34,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:55:34,430 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 [2022-04-06 16:55:34,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:55:34,432 INFO L225 Difference]: With dead ends: 28 [2022-04-06 16:55:34,432 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 16:55:34,435 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 [2022-04-06 16:55:34,436 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 [2022-04-06 16:55:34,436 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] [2022-04-06 16:55:34,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 16:55:34,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-06 16:55:34,445 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) [2022-04-06 16:55:34,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-04-06 16:55:34,446 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2022-04-06 16:55:34,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:55:34,447 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-04-06 16:55:34,447 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) [2022-04-06 16:55:34,448 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-06 16:55:34,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 16:55:34,449 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:55:34,449 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:55:34,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 16:55:34,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:55:34,664 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:55:34,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:55:34,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2022-04-06 16:55:34,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:55:34,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2070862492] [2022-04-06 16:55:34,679 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 16:55:34,679 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 16:55:34,679 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 16:55:34,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 2 times [2022-04-06 16:55:34,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:55:34,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182956239] [2022-04-06 16:55:34,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:55:34,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:55:34,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:55:34,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554478835] [2022-04-06 16:55:34,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:55:34,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:55:34,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:55:34,699 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:55:34,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 16:55:34,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:55:34,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:55:34,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 16:55:34,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:55:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 16:55:34,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:55:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 16:55:34,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:55:34,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182956239] [2022-04-06 16:55:34,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:55:34,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554478835] [2022-04-06 16:55:34,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554478835] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:55:34,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:55:34,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-06 16:55:34,881 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:55:34,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2070862492] [2022-04-06 16:55:34,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2070862492] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:55:34,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:55:34,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:55:34,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275819046] [2022-04-06 16:55:34,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:55:34,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:55:34,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:55:34,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:55:34,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:55:34,885 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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) [2022-04-06 16:55:34,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:55:34,926 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-04-06 16:55:34,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:55:34,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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 [2022-04-06 16:55:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:55:34,928 INFO L225 Difference]: With dead ends: 34 [2022-04-06 16:55:34,928 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 16:55:34,928 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:55:34,930 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 58 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 [2022-04-06 16:55:34,930 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:55:34,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 16:55:34,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-06 16:55:34,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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) [2022-04-06 16:55:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-04-06 16:55:34,934 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2022-04-06 16:55:34,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:55:34,934 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-04-06 16:55:34,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 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) [2022-04-06 16:55:34,934 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-04-06 16:55:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 16:55:34,935 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:55:34,935 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:55:34,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 16:55:35,144 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:55:35,145 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:55:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:55:35,145 INFO L85 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2022-04-06 16:55:35,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:55:35,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1857701343] [2022-04-06 16:55:35,149 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 16:55:35,149 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 16:55:35,149 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 16:55:35,150 INFO L85 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 2 times [2022-04-06 16:55:35,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:55:35,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911970735] [2022-04-06 16:55:35,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:55:35,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:55:35,167 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:55:35,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27458041] [2022-04-06 16:55:35,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:55:35,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:55:35,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:55:35,170 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:55:35,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 16:55:35,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:55:35,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:55:35,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 16:55:35,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:55:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 16:55:35,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:55:35,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 16:55:35,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:55:35,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911970735] [2022-04-06 16:55:35,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:55:35,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27458041] [2022-04-06 16:55:35,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27458041] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:55:35,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:55:35,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-04-06 16:55:35,675 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:55:35,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1857701343] [2022-04-06 16:55:35,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1857701343] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:55:35,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:55:35,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:55:35,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420776758] [2022-04-06 16:55:35,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:55:35,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:55:35,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:55:35,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:55:35,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-06 16:55:35,676 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 16:55:35,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:55:35,982 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-04-06 16:55:35,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:55:35,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 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 [2022-04-06 16:55:35,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:55:35,983 INFO L225 Difference]: With dead ends: 36 [2022-04-06 16:55:35,984 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 16:55:35,984 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:55:35,984 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:55:35,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 92 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:55:35,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 16:55:35,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-06 16:55:35,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 16:55:35,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-04-06 16:55:35,989 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2022-04-06 16:55:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:55:35,989 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-04-06 16:55:35,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 16:55:35,989 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-06 16:55:35,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 16:55:35,990 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:55:35,990 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:55:36,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 16:55:36,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:55:36,204 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:55:36,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:55:36,204 INFO L85 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 3 times [2022-04-06 16:55:36,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:55:36,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [864131738] [2022-04-06 16:55:36,208 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 16:55:36,208 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 16:55:36,208 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 16:55:36,208 INFO L85 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 4 times [2022-04-06 16:55:36,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:55:36,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250625925] [2022-04-06 16:55:36,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:55:36,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:55:36,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:55:36,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113279907] [2022-04-06 16:55:36,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:55:36,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:55:36,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:55:36,215 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:55:36,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 16:55:36,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:55:36,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:55:36,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 16:55:36,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:55:36,640 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:55:36,643 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:55:36,648 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:55:42,722 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse4 (= c_main_~z~0 0)) (.cse0 (+ (* (- 1) c_main_~a~0) c_main_~x~0))) (or (and (= (mod .cse0 c_main_~z~0) 0) (let ((.cse1 (= c_main_~az~0 0)) (.cse2 (let ((.cse3 (div .cse0 c_main_~z~0))) (+ (* .cse3 c_main_~z~0) (* (- 1) .cse3) c_main_~a~0)))) (or (and (= (mod c_main_~y~0 c_main_~z~0) 0) .cse1 (= .cse2 0)) (and (= (* (div .cse2 c_main_~az~0) c_main_~z~0) c_main_~y~0) (not .cse1) (= (mod .cse2 c_main_~az~0) 0)))) (not .cse4)) (and (= c_main_~y~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ c_main_~a~0 (* v_main_~x~0_29 c_main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 c_main_~az~0)))) .cse4 (= 0 .cse0)))) is different from false [2022-04-06 16:56:29,598 WARN L232 SmtUtils]: Spent 20.30s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:56:29,613 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:56:29,626 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:56:29,630 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:56:29,646 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:56:50,467 WARN L232 SmtUtils]: Spent 8.66s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 16:57:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2022-04-06 16:57:22,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:57:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 16:57:28,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:57:28,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250625925] [2022-04-06 16:57:28,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:57:28,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113279907] [2022-04-06 16:57:28,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113279907] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:57:28,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:57:28,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2022-04-06 16:57:28,622 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:57:28,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [864131738] [2022-04-06 16:57:28,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [864131738] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:57:28,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:57:28,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:57:28,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637856666] [2022-04-06 16:57:28,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:57:28,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:57:28,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:57:28,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:57:28,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=4, NotChecked=18, Total=132 [2022-04-06 16:57:28,624 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:57:30,803 WARN L833 $PredicateComparison]: unable to prove that (and (let ((.cse4 (= c_main_~z~0 0)) (.cse0 (+ (* (- 1) c_main_~a~0) c_main_~x~0))) (or (and (= (mod .cse0 c_main_~z~0) 0) (let ((.cse1 (= c_main_~az~0 0)) (.cse2 (let ((.cse3 (div .cse0 c_main_~z~0))) (+ (* .cse3 c_main_~z~0) (* (- 1) .cse3) c_main_~a~0)))) (or (and (= (mod c_main_~y~0 c_main_~z~0) 0) .cse1 (= .cse2 0)) (and (= (* (div .cse2 c_main_~az~0) c_main_~z~0) c_main_~y~0) (not .cse1) (= (mod .cse2 c_main_~az~0) 0)))) (not .cse4)) (and (= c_main_~y~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ c_main_~a~0 (* v_main_~x~0_29 c_main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 c_main_~az~0)))) .cse4 (= 0 .cse0)))) (= (+ (* c_main_~x~0 c_main_~z~0) c_main_~a~0) (+ (* c_main_~y~0 c_main_~az~0) c_main_~x~0))) is different from false [2022-04-06 16:57:38,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:57:38,889 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-04-06 16:57:38,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 16:57:38,890 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-04-06 16:57:38,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:57:38,891 INFO L225 Difference]: With dead ends: 40 [2022-04-06 16:57:38,891 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 16:57:38,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 51.2s TimeCoverageRelationStatistics Valid=46, Invalid=113, Unknown=5, NotChecked=46, Total=210 [2022-04-06 16:57:38,892 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:57:38,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 70 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-04-06 16:57:38,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 16:57:38,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 16:57:38,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-06 16:57:38,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-04-06 16:57:38,897 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 28 [2022-04-06 16:57:38,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:57:38,897 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-04-06 16:57:38,898 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 16:57:38,898 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-04-06 16:57:38,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 16:57:38,898 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:57:38,898 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:57:38,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 16:57:39,101 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:57:39,101 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:57:39,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:57:39,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1823573773, now seen corresponding path program 1 times [2022-04-06 16:57:39,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:57:39,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [372948351] [2022-04-06 16:57:39,104 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 16:57:39,104 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 16:57:39,104 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 16:57:39,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1823573773, now seen corresponding path program 2 times [2022-04-06 16:57:39,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:57:39,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264633554] [2022-04-06 16:57:39,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:57:39,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:57:39,113 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:57:39,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434342229] [2022-04-06 16:57:39,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:57:39,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:57:39,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:57:39,114 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:57:39,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 16:57:39,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:57:39,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:57:39,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 16:57:39,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:57:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 16:57:39,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:57:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 16:57:39,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:57:39,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264633554] [2022-04-06 16:57:39,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:57:39,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434342229] [2022-04-06 16:57:39,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434342229] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:57:39,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:57:39,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-04-06 16:57:39,309 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:57:39,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [372948351] [2022-04-06 16:57:39,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [372948351] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:57:39,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:57:39,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 16:57:39,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883847349] [2022-04-06 16:57:39,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:57:39,310 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 16:57:39,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:57:39,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 16:57:39,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:57:39,310 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 16:57:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:57:39,623 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-04-06 16:57:39,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:57:39,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2022-04-06 16:57:39,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:57:39,624 INFO L225 Difference]: With dead ends: 35 [2022-04-06 16:57:39,624 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 16:57:39,624 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 16:57:39,625 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:57:39,625 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 54 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:57:39,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 16:57:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 16:57:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 16:57:39,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 16:57:39,625 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2022-04-06 16:57:39,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:57:39,626 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 16:57:39,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 16:57:39,626 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 16:57:39,626 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 16:57:39,640 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 16:57:39,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 16:57:39,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:57:39,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 16:58:25,257 WARN L232 SmtUtils]: Spent 45.38s on a formula simplification. DAG size of input: 84 DAG size of output: 60 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 16:59:17,350 WARN L232 SmtUtils]: Spent 52.09s on a formula simplification. DAG size of input: 83 DAG size of output: 61 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 17:00:20,082 WARN L232 SmtUtils]: Spent 1.05m on a formula simplification. DAG size of input: 86 DAG size of output: 63 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 17:01:38,911 WARN L232 SmtUtils]: Spent 1.31m on a formula simplification. DAG size of input: 80 DAG size of output: 49 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 17:02:53,501 WARN L232 SmtUtils]: Spent 1.24m on a formula simplification. DAG size of input: 63 DAG size of output: 50 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 17:02:53,519 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-04-06 17:02:53,519 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-04-06 17:02:53,519 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-04-06 17:02:53,519 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2022-04-06 17:02:53,520 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-04-06 17:02:53,520 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-04-06 17:02:53,520 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-04-06 17:02:53,520 INFO L878 garLoopResultBuilder]: At program point L34-1(lines 34 43) the Hoare annotation is: (let ((.cse1 (= (* main_~a~0 main_~z~0) main_~az~0)) (.cse0 (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)))) (or (and (<= ~counter~0 1) (= main_~y~0 1) (<= |main_#t~post7| 0) .cse0 .cse1) (and (<= |main_#t~post7| 1) (= main_~z~0 main_~y~0) .cse0 .cse1) (not (<= |old(~counter~0)| 0)) (and (or (= main_~y~0 0) (and (not (= main_~z~0 0)) (let ((.cse6 (* (- 1) main_~a~0))) (let ((.cse2 (div (+ .cse6 main_~x~0) main_~z~0))) (let ((.cse3 (* .cse2 main_~z~0))) (or (and (= (mod main_~y~0 main_~z~0) 0) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= .cse2 (+ main_~a~0 .cse3))) (let ((.cse4 (div (+ (* (- 1) .cse2) main_~a~0 .cse3) main_~az~0))) (and (= .cse4 (* main_~z~0 (div (let ((.cse5 (div (+ .cse2 .cse6) main_~z~0))) (+ (* (- 1) .cse5) main_~a~0 (* main_~z~0 .cse5))) main_~az~0))) (not (= main_~az~0 0)) (= (* .cse4 main_~z~0) main_~y~0))))))))) .cse0))) [2022-04-06 17:02:53,520 INFO L878 garLoopResultBuilder]: At program point L34-3(lines 34 43) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))) (.cse1 (= (* main_~a~0 main_~z~0) main_~az~0))) (or (and (= main_~z~0 main_~y~0) (<= ~counter~0 1) .cse0 .cse1) (not (<= |old(~counter~0)| 0)) (and (or (and (let ((.cse6 (* (- 1) main_~a~0))) (let ((.cse2 (div (+ .cse6 main_~x~0) main_~z~0))) (let ((.cse3 (* .cse2 main_~z~0))) (or (and (= (mod main_~y~0 main_~z~0) 0) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= .cse2 (+ main_~a~0 .cse3))) (let ((.cse4 (div (+ (* (- 1) .cse2) main_~a~0 .cse3) main_~az~0))) (and (= .cse4 (* main_~z~0 (div (let ((.cse5 (div (+ .cse2 .cse6) main_~z~0))) (+ (* (- 1) .cse5) main_~a~0 (* main_~z~0 .cse5))) main_~az~0))) (= (* .cse4 main_~z~0) main_~y~0))))))) (not (= main_~z~0 0))) (and (= main_~y~0 0) (= main_~a~0 main_~x~0))) .cse0) (and (= main_~y~0 1) (<= ~counter~0 0) .cse0 .cse1))) [2022-04-06 17:02:53,520 INFO L878 garLoopResultBuilder]: At program point L34-4(lines 34 43) the Hoare annotation is: (let ((.cse3 (= main_~a~0 main_~x~0))) (or (and (or (let ((.cse2 (+ (* (- 1) main_~a~0) main_~x~0))) (and (let ((.cse0 (div .cse2 main_~z~0))) (let ((.cse1 (* .cse0 main_~z~0))) (or (and (= (mod main_~y~0 main_~z~0) 0) (= .cse0 (+ main_~a~0 .cse1))) (and (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) .cse0) main_~a~0 .cse1) main_~az~0) main_~z~0) main_~y~0))))) (= 0 (mod .cse2 main_~z~0)) (not (= main_~z~0 0)))) (and (= main_~y~0 0) .cse3)) (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))) (and (= main_~y~0 1) .cse3 (= (* main_~a~0 main_~z~0) main_~az~0)) (not (<= |old(~counter~0)| 0)))) [2022-04-06 17:02:53,520 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 22 46) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (<= ~counter~0 0)) [2022-04-06 17:02:53,520 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 46) the Hoare annotation is: true [2022-04-06 17:02:53,520 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 46) the Hoare annotation is: true [2022-04-06 17:02:53,520 INFO L885 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: true [2022-04-06 17:02:53,521 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse5 (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))) (.cse6 (= (* main_~a~0 main_~z~0) main_~az~0))) (or (not (<= |old(~counter~0)| 0)) (and (or (and (= main_~y~0 0) (= main_~a~0 main_~x~0)) (and (not (= main_~z~0 0)) (let ((.cse4 (* (- 1) main_~a~0))) (let ((.cse0 (div (+ .cse4 main_~x~0) main_~z~0))) (let ((.cse1 (* .cse0 main_~z~0))) (or (and (= (mod main_~y~0 main_~z~0) 0) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= .cse0 (+ main_~a~0 .cse1))) (let ((.cse2 (div (+ (* (- 1) .cse0) main_~a~0 .cse1) main_~az~0))) (and (= .cse2 (* main_~z~0 (div (let ((.cse3 (div (+ .cse0 .cse4) main_~z~0))) (+ (* (- 1) .cse3) main_~a~0 (* main_~z~0 .cse3))) main_~az~0))) (not (= main_~az~0 0)) (= (* .cse2 main_~z~0) main_~y~0))))))))) .cse5) (and (= main_~z~0 main_~y~0) .cse5 .cse6) (and (<= ~counter~0 1) (= main_~y~0 1) .cse5 .cse6))) [2022-04-06 17:02:53,521 INFO L878 garLoopResultBuilder]: At program point L35-1(lines 34 43) the Hoare annotation is: (let ((.cse3 (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)))) (or (and (or (let ((.cse2 (+ (* (- 1) main_~a~0) main_~x~0))) (and (let ((.cse0 (div .cse2 main_~z~0))) (let ((.cse1 (* .cse0 main_~z~0))) (or (and (= (mod main_~y~0 main_~z~0) 0) (= .cse0 (+ main_~a~0 .cse1))) (and (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) .cse0) main_~a~0 .cse1) main_~az~0) main_~z~0) main_~y~0))))) (= 0 (mod .cse2 main_~z~0)) (not (= main_~z~0 0)))) (and (= main_~y~0 0) (= main_~a~0 main_~x~0))) .cse3) (not (<= |old(~counter~0)| 0)) (and (<= ~counter~0 1) (= main_~y~0 1) .cse3 (= (* main_~a~0 main_~z~0) main_~az~0)))) [2022-04-06 17:02:53,521 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-04-06 17:02:53,521 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2022-04-06 17:02:53,521 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-04-06 17:02:53,521 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 17:02:53,521 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-04-06 17:02:53,521 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 17:02:53,521 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 17:02:53,521 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 17:02:53,521 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-06 17:02:53,521 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-06 17:02:53,521 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= __VERIFIER_assert_~cond 1)) [2022-04-06 17:02:53,521 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (not (= |__VERIFIER_assert_#in~cond| 1)) (= __VERIFIER_assert_~cond 1)) [2022-04-06 17:02:53,522 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 17:02:53,523 INFO L719 BasicCegarLoop]: Path program histogram: [4, 2, 2, 2, 2, 2] [2022-04-06 17:02:53,524 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 17:02:53,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 05:02:53 BoogieIcfgContainer [2022-04-06 17:02:53,548 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 17:02:53,548 INFO L158 Benchmark]: Toolchain (without parser) took 440659.55ms. Allocated memory was 196.1MB in the beginning and 235.9MB in the end (delta: 39.8MB). Free memory was 147.9MB in the beginning and 129.5MB in the end (delta: 18.4MB). Peak memory consumption was 58.7MB. Max. memory is 8.0GB. [2022-04-06 17:02:53,548 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 196.1MB. Free memory was 164.1MB in the beginning and 164.0MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 17:02:53,548 INFO L158 Benchmark]: CACSL2BoogieTranslator took 160.69ms. Allocated memory is still 196.1MB. Free memory was 147.7MB in the beginning and 173.0MB in the end (delta: -25.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-06 17:02:53,549 INFO L158 Benchmark]: Boogie Preprocessor took 16.10ms. Allocated memory is still 196.1MB. Free memory was 173.0MB in the beginning and 171.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 17:02:53,549 INFO L158 Benchmark]: RCFGBuilder took 221.45ms. Allocated memory is still 196.1MB. Free memory was 171.5MB in the beginning and 161.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 17:02:53,549 INFO L158 Benchmark]: TraceAbstraction took 440257.46ms. Allocated memory was 196.1MB in the beginning and 235.9MB in the end (delta: 39.8MB). Free memory was 160.8MB in the beginning and 129.5MB in the end (delta: 31.3MB). Peak memory consumption was 72.7MB. Max. memory is 8.0GB. [2022-04-06 17:02:53,550 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 196.1MB. Free memory was 164.1MB in the beginning and 164.0MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 160.69ms. Allocated memory is still 196.1MB. Free memory was 147.7MB in the beginning and 173.0MB in the end (delta: -25.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.10ms. Allocated memory is still 196.1MB. Free memory was 173.0MB in the beginning and 171.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 221.45ms. Allocated memory is still 196.1MB. Free memory was 171.5MB in the beginning and 161.4MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 440257.46ms. Allocated memory was 196.1MB in the beginning and 235.9MB in the end (delta: 39.8MB). Free memory was 160.8MB in the beginning and 129.5MB in the end (delta: 31.3MB). Peak memory consumption was 72.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 440.2s, OverallIterations: 7, TraceHistogramMax: 4, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 11.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 313.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 52 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 50 mSDsluCounter, 400 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 35 IncrementalHoareTripleChecker+Unchecked, 279 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 148 IncrementalHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 121 mSDtfsCounter, 148 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 242 GetRequests, 192 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 51.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=6, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 82 PreInvPairs, 131 NumberOfFragments, 873 HoareAnnotationTreeSize, 82 FomulaSimplifications, 82 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 22 FomulaSimplificationsInter, 1197 FormulaSimplificationTreeSizeReductionInter, 313.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((((z == y && counter <= 1) && y * az + x == z * x + a) && a * z == az) || !(\old(counter) <= 0)) || ((((((y % z == 0 && y / z % z == 0) && (-1 * a + x) / z == a + (-1 * a + x) / z * z) || ((-1 * ((-1 * a + x) / z) + a + (-1 * a + x) / z * z) / az == z * ((-1 * (((-1 * a + x) / z + -1 * a) / z) + a + z * (((-1 * a + x) / z + -1 * a) / z)) / az) && (-1 * ((-1 * a + x) / z) + a + (-1 * a + x) / z * z) / az * z == y)) && !(z == 0)) || (y == 0 && a == x)) && y * az + x == z * x + a)) || (((y == 1 && counter <= 0) && y * az + x == z * x + a) && a * z == az) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: !(\old(cond) == 1) || cond == 1 RESULT: Ultimate proved your program to be correct! [2022-04-06 17:02:53,631 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...