/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-e106359-m [2022-04-15 09:11:25,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-15 09:11:25,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-15 09:11:25,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-15 09:11:25,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-15 09:11:25,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-15 09:11:25,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-15 09:11:25,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-15 09:11:25,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-15 09:11:25,673 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-15 09:11:25,675 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-15 09:11:25,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-15 09:11:25,679 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-15 09:11:25,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-15 09:11:25,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-15 09:11:25,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-15 09:11:25,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-15 09:11:25,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-15 09:11:25,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-15 09:11:25,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-15 09:11:25,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-15 09:11:25,694 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-15 09:11:25,701 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-15 09:11:25,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-15 09:11:25,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-15 09:11:25,703 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-15 09:11:25,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-15 09:11:25,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-15 09:11:25,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-15 09:11:25,703 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-15 09:11:25,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-15 09:11:25,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-15 09:11:25,704 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-15 09:11:25,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-15 09:11:25,704 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-15 09:11:25,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-15 09:11:25,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-15 09:11:25,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-15 09:11:25,704 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-15 09:11:25,704 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-15 09:11:25,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 09:11:25,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-15 09:11:25,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-15 09:11:25,705 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-15 09:11:25,705 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-15 09:11:25,705 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-15 09:11:25,705 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-15 09:11:25,705 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-15 09:11:25,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-15 09:11:25,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-15 09:11:25,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-15 09:11:25,888 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-15 09:11:25,889 INFO L275 PluginConnector]: CDTParser initialized [2022-04-15 09:11:25,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c [2022-04-15 09:11:25,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7da744f93/91ac7c893f6e4196971cf82d2d957cdf/FLAGc6be0991d [2022-04-15 09:11:26,316 INFO L306 CDTParser]: Found 1 translation units. [2022-04-15 09:11:26,316 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound20.c [2022-04-15 09:11:26,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7da744f93/91ac7c893f6e4196971cf82d2d957cdf/FLAGc6be0991d [2022-04-15 09:11:26,329 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7da744f93/91ac7c893f6e4196971cf82d2d957cdf [2022-04-15 09:11:26,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-15 09:11:26,331 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-15 09:11:26,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-15 09:11:26,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-15 09:11:26,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-15 09:11:26,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 09:11:26" (1/1) ... [2022-04-15 09:11:26,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d15d12a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:11:26, skipping insertion in model container [2022-04-15 09:11:26,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 09:11:26" (1/1) ... [2022-04-15 09:11:26,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-15 09:11:26,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-15 09:11:26,480 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_unwindbound20.c[525,538] [2022-04-15 09:11:26,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 09:11:26,522 INFO L203 MainTranslator]: Completed pre-run [2022-04-15 09:11:26,529 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_unwindbound20.c[525,538] [2022-04-15 09:11:26,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 09:11:26,542 INFO L208 MainTranslator]: Completed translation [2022-04-15 09:11:26,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:11:26 WrapperNode [2022-04-15 09:11:26,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-15 09:11:26,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-15 09:11:26,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-15 09:11:26,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-15 09:11:26,549 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:11:26" (1/1) ... [2022-04-15 09:11:26,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:11:26" (1/1) ... [2022-04-15 09:11:26,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:11:26" (1/1) ... [2022-04-15 09:11:26,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:11:26" (1/1) ... [2022-04-15 09:11:26,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:11:26" (1/1) ... [2022-04-15 09:11:26,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:11:26" (1/1) ... [2022-04-15 09:11:26,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:11:26" (1/1) ... [2022-04-15 09:11:26,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-15 09:11:26,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-15 09:11:26,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-15 09:11:26,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-15 09:11:26,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:11:26" (1/1) ... [2022-04-15 09:11:26,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 09:11:26,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 09:11:26,586 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-15 09:11:26,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-15 09:11:26,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-15 09:11:26,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-15 09:11:26,610 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-15 09:11:26,610 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-15 09:11:26,611 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-15 09:11:26,611 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-15 09:11:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-15 09:11:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-15 09:11:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-15 09:11:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-15 09:11:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-15 09:11:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-15 09:11:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-15 09:11:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-15 09:11:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-15 09:11:26,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-15 09:11:26,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-15 09:11:26,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-15 09:11:26,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-15 09:11:26,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-15 09:11:26,654 INFO L234 CfgBuilder]: Building ICFG [2022-04-15 09:11:26,655 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-15 09:11:26,802 INFO L275 CfgBuilder]: Performing block encoding [2022-04-15 09:11:26,806 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-15 09:11:26,807 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-15 09:11:26,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 09:11:26 BoogieIcfgContainer [2022-04-15 09:11:26,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-15 09:11:26,809 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-15 09:11:26,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-15 09:11:26,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-15 09:11:26,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 09:11:26" (1/3) ... [2022-04-15 09:11:26,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8969cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 09:11:26, skipping insertion in model container [2022-04-15 09:11:26,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:11:26" (2/3) ... [2022-04-15 09:11:26,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8969cc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 09:11:26, skipping insertion in model container [2022-04-15 09:11:26,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 09:11:26" (3/3) ... [2022-04-15 09:11:26,826 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound20.c [2022-04-15 09:11:26,829 INFO L202 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-15 09:11:26,829 INFO L161 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-15 09:11:26,870 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-15 09:11:26,874 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-15 09:11:26,874 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-15 09:11:26,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 09:11:26,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-15 09:11:26,903 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 09:11:26,903 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 09:11:26,904 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 09:11:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 09:11:26,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2022-04-15 09:11:26,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 09:11:26,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2118707946] [2022-04-15 09:11:26,920 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 09:11:26,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 2 times [2022-04-15 09:11:26,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 09:11:26,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051107867] [2022-04-15 09:11:26,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 09:11:26,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 09:11:26,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 09:11:26,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097750774] [2022-04-15 09:11:26,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 09:11:26,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 09:11:26,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 09:11:26,999 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 09:11:27,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-15 09:11:27,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 09:11:27,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 09:11:27,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2022-04-15 09:11:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 09:11:27,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 09:11:27,113 INFO L272 TraceCheckUtils]: 0: Hoare triple {25#true} call ULTIMATE.init(); {25#true} is VALID [2022-04-15 09:11:27,113 INFO L290 TraceCheckUtils]: 1: Hoare triple {25#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {25#true} is VALID [2022-04-15 09:11:27,113 INFO L290 TraceCheckUtils]: 2: Hoare triple {25#true} assume true; {25#true} is VALID [2022-04-15 09:11:27,114 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {25#true} {25#true} #54#return; {25#true} is VALID [2022-04-15 09:11:27,114 INFO L272 TraceCheckUtils]: 4: Hoare triple {25#true} call #t~ret8 := main(); {25#true} is VALID [2022-04-15 09:11:27,114 INFO L290 TraceCheckUtils]: 5: Hoare triple {25#true} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {25#true} is VALID [2022-04-15 09:11:27,115 INFO L290 TraceCheckUtils]: 6: Hoare triple {25#true} assume !true; {26#false} is VALID [2022-04-15 09:11:27,115 INFO L272 TraceCheckUtils]: 7: Hoare triple {26#false} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {26#false} is VALID [2022-04-15 09:11:27,115 INFO L290 TraceCheckUtils]: 8: Hoare triple {26#false} ~cond := #in~cond; {26#false} is VALID [2022-04-15 09:11:27,115 INFO L290 TraceCheckUtils]: 9: Hoare triple {26#false} assume 0 == ~cond; {26#false} is VALID [2022-04-15 09:11:27,115 INFO L290 TraceCheckUtils]: 10: Hoare triple {26#false} assume !false; {26#false} is VALID [2022-04-15 09:11:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 09:11:27,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 09:11:27,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 09:11:27,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051107867] [2022-04-15 09:11:27,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 09:11:27,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097750774] [2022-04-15 09:11:27,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097750774] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 09:11:27,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 09:11:27,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-15 09:11:27,119 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 09:11:27,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2118707946] [2022-04-15 09:11:27,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2118707946] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 09:11:27,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 09:11:27,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-15 09:11:27,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178533659] [2022-04-15 09:11:27,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 09:11:27,124 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 [2022-04-15 09:11:27,124 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 09:11:27,126 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 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) [2022-04-15 09:11:27,137 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:11:27,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-04-15 09:11:27,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 09:11:27,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-04-15 09:11:27,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-15 09:11:27,152 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) [2022-04-15 09:11:27,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:11:27,184 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-04-15 09:11:27,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-04-15 09:11:27,185 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 [2022-04-15 09:11:27,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 09:11:27,185 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2022-04-15 09:11:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 48 transitions. [2022-04-15 09:11:27,194 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2022-04-15 09:11:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 48 transitions. [2022-04-15 09:11:27,197 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 2 states and 48 transitions. [2022-04-15 09:11:27,253 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 48 edges. 48 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:11:27,261 INFO L225 Difference]: With dead ends: 38 [2022-04-15 09:11:27,261 INFO L226 Difference]: Without dead ends: 17 [2022-04-15 09:11:27,263 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 [2022-04-15 09:11:27,267 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 [2022-04-15 09:11:27,268 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] [2022-04-15 09:11:27,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-15 09:11:27,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-15 09:11:27,294 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 09:11:27,295 INFO L82 GeneralOperation]: Start isEquivalent. First operand 17 states. Second operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 09:11:27,295 INFO L74 IsIncluded]: Start isIncluded. First operand 17 states. Second operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 09:11:27,296 INFO L87 Difference]: Start difference. First operand 17 states. Second operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 09:11:27,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:11:27,301 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-04-15 09:11:27,301 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-15 09:11:27,301 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:11:27,301 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:11:27,302 INFO L74 IsIncluded]: Start isIncluded. First operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 17 states. [2022-04-15 09:11:27,302 INFO L87 Difference]: Start difference. First operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 17 states. [2022-04-15 09:11:27,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:11:27,304 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-04-15 09:11:27,304 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-15 09:11:27,305 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:11:27,306 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:11:27,307 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 09:11:27,307 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 09:11:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 09:11:27,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-15 09:11:27,318 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-04-15 09:11:27,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 09:11:27,318 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-15 09:11:27,318 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) [2022-04-15 09:11:27,318 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 17 states and 19 transitions. [2022-04-15 09:11:27,340 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 19 edges. 19 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:11:27,340 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-15 09:11:27,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-15 09:11:27,341 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 09:11:27,341 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 09:11:27,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-15 09:11:27,551 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 [2022-04-15 09:11:27,552 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 09:11:27,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 09:11:27,555 INFO L85 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2022-04-15 09:11:27,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 09:11:27,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [81402544] [2022-04-15 09:11:27,556 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 09:11:27,556 INFO L85 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 2 times [2022-04-15 09:11:27,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 09:11:27,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895465060] [2022-04-15 09:11:27,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 09:11:27,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 09:11:27,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 09:11:27,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444400078] [2022-04-15 09:11:27,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 09:11:27,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 09:11:27,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 09:11:27,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 09:11:27,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-15 09:11:27,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 09:11:27,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 09:11:27,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-15 09:11:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 09:11:27,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 09:11:27,715 INFO L272 TraceCheckUtils]: 0: Hoare triple {203#true} call ULTIMATE.init(); {203#true} is VALID [2022-04-15 09:11:27,716 INFO L290 TraceCheckUtils]: 1: Hoare triple {203#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {211#(<= ~counter~0 0)} is VALID [2022-04-15 09:11:27,716 INFO L290 TraceCheckUtils]: 2: Hoare triple {211#(<= ~counter~0 0)} assume true; {211#(<= ~counter~0 0)} is VALID [2022-04-15 09:11:27,717 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {211#(<= ~counter~0 0)} {203#true} #54#return; {211#(<= ~counter~0 0)} is VALID [2022-04-15 09:11:27,717 INFO L272 TraceCheckUtils]: 4: Hoare triple {211#(<= ~counter~0 0)} call #t~ret8 := main(); {211#(<= ~counter~0 0)} is VALID [2022-04-15 09:11:27,717 INFO L290 TraceCheckUtils]: 5: Hoare triple {211#(<= ~counter~0 0)} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {211#(<= ~counter~0 0)} is VALID [2022-04-15 09:11:27,718 INFO L290 TraceCheckUtils]: 6: Hoare triple {211#(<= ~counter~0 0)} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {227#(<= |main_#t~post7| 0)} is VALID [2022-04-15 09:11:27,718 INFO L290 TraceCheckUtils]: 7: Hoare triple {227#(<= |main_#t~post7| 0)} assume !(#t~post7 < 20);havoc #t~post7; {204#false} is VALID [2022-04-15 09:11:27,718 INFO L272 TraceCheckUtils]: 8: Hoare triple {204#false} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {204#false} is VALID [2022-04-15 09:11:27,719 INFO L290 TraceCheckUtils]: 9: Hoare triple {204#false} ~cond := #in~cond; {204#false} is VALID [2022-04-15 09:11:27,719 INFO L290 TraceCheckUtils]: 10: Hoare triple {204#false} assume 0 == ~cond; {204#false} is VALID [2022-04-15 09:11:27,719 INFO L290 TraceCheckUtils]: 11: Hoare triple {204#false} assume !false; {204#false} is VALID [2022-04-15 09:11:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 09:11:27,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 09:11:27,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 09:11:27,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895465060] [2022-04-15 09:11:27,720 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 09:11:27,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444400078] [2022-04-15 09:11:27,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444400078] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 09:11:27,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 09:11:27,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-15 09:11:27,720 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 09:11:27,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [81402544] [2022-04-15 09:11:27,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [81402544] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 09:11:27,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 09:11:27,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-15 09:11:27,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458165123] [2022-04-15 09:11:27,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 09:11:27,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-15 09:11:27,721 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 09:11:27,722 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 09:11:27,730 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:11:27,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-15 09:11:27,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 09:11:27,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-15 09:11:27,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-15 09:11:27,731 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 09:11:27,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:11:27,765 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-04-15 09:11:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-15 09:11:27,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-15 09:11:27,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 09:11:27,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 09:11:27,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2022-04-15 09:11:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 09:11:27,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2022-04-15 09:11:27,768 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 28 transitions. [2022-04-15 09:11:27,787 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:11:27,788 INFO L225 Difference]: With dead ends: 26 [2022-04-15 09:11:27,796 INFO L226 Difference]: Without dead ends: 19 [2022-04-15 09:11:27,796 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-15 09:11:27,797 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 09:11:27,798 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 09:11:27,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-15 09:11:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-15 09:11:27,803 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 09:11:27,803 INFO L82 GeneralOperation]: Start isEquivalent. First operand 19 states. Second operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 09:11:27,803 INFO L74 IsIncluded]: Start isIncluded. First operand 19 states. Second operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 09:11:27,804 INFO L87 Difference]: Start difference. First operand 19 states. Second operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 09:11:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:11:27,805 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-15 09:11:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-15 09:11:27,805 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:11:27,805 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:11:27,805 INFO L74 IsIncluded]: Start isIncluded. First operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 19 states. [2022-04-15 09:11:27,806 INFO L87 Difference]: Start difference. First operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 19 states. [2022-04-15 09:11:27,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:11:27,807 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-15 09:11:27,807 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-15 09:11:27,807 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:11:27,807 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:11:27,807 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 09:11:27,807 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 09:11:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 09:11:27,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-15 09:11:27,808 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-04-15 09:11:27,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 09:11:27,809 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-15 09:11:27,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 09:11:27,809 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 19 states and 21 transitions. [2022-04-15 09:11:27,822 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 21 edges. 21 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:11:27,823 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-15 09:11:27,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-15 09:11:27,823 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 09:11:27,823 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 09:11:27,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-15 09:11:28,039 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 [2022-04-15 09:11:28,040 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 09:11:28,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 09:11:28,040 INFO L85 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2022-04-15 09:11:28,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 09:11:28,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1970472284] [2022-04-15 09:11:28,041 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 09:11:28,041 INFO L85 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 2 times [2022-04-15 09:11:28,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 09:11:28,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484688871] [2022-04-15 09:11:28,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 09:11:28,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 09:11:28,061 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 09:11:28,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477799702] [2022-04-15 09:11:28,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 09:11:28,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 09:11:28,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 09:11:28,063 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 09:11:28,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 09:11:28,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 09:11:28,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-15 09:11:28,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-15 09:11:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 09:11:28,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 09:11:28,219 INFO L272 TraceCheckUtils]: 0: Hoare triple {370#true} call ULTIMATE.init(); {370#true} is VALID [2022-04-15 09:11:28,220 INFO L290 TraceCheckUtils]: 1: Hoare triple {370#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {370#true} is VALID [2022-04-15 09:11:28,220 INFO L290 TraceCheckUtils]: 2: Hoare triple {370#true} assume true; {370#true} is VALID [2022-04-15 09:11:28,220 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {370#true} {370#true} #54#return; {370#true} is VALID [2022-04-15 09:11:28,220 INFO L272 TraceCheckUtils]: 4: Hoare triple {370#true} call #t~ret8 := main(); {370#true} is VALID [2022-04-15 09:11:28,221 INFO L290 TraceCheckUtils]: 5: Hoare triple {370#true} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {390#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-15 09:11:28,221 INFO L290 TraceCheckUtils]: 6: Hoare triple {390#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {390#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-15 09:11:28,222 INFO L290 TraceCheckUtils]: 7: Hoare triple {390#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} assume !!(#t~post7 < 20);havoc #t~post7; {390#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-15 09:11:28,223 INFO L272 TraceCheckUtils]: 8: Hoare triple {390#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {400#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 09:11:28,223 INFO L290 TraceCheckUtils]: 9: Hoare triple {400#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {404#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 09:11:28,223 INFO L290 TraceCheckUtils]: 10: Hoare triple {404#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {371#false} is VALID [2022-04-15 09:11:28,224 INFO L290 TraceCheckUtils]: 11: Hoare triple {371#false} assume !false; {371#false} is VALID [2022-04-15 09:11:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 09:11:28,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 09:11:28,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 09:11:28,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484688871] [2022-04-15 09:11:28,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 09:11:28,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477799702] [2022-04-15 09:11:28,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477799702] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 09:11:28,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 09:11:28,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 09:11:28,225 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 09:11:28,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1970472284] [2022-04-15 09:11:28,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1970472284] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 09:11:28,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 09:11:28,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 09:11:28,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797778959] [2022-04-15 09:11:28,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 09:11:28,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-15 09:11:28,226 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 09:11:28,226 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 09:11:28,235 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:11:28,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-15 09:11:28,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 09:11:28,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-15 09:11:28,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-15 09:11:28,236 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 09:11:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:11:28,329 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-04-15 09:11:28,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-15 09:11:28,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-15 09:11:28,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 09:11:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 09:11:28,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 31 transitions. [2022-04-15 09:11:28,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 09:11:28,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 31 transitions. [2022-04-15 09:11:28,337 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 31 transitions. [2022-04-15 09:11:28,359 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 31 edges. 31 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:11:28,360 INFO L225 Difference]: With dead ends: 28 [2022-04-15 09:11:28,360 INFO L226 Difference]: Without dead ends: 25 [2022-04-15 09:11:28,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-15 09:11:28,368 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 09:11:28,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 09:11:28,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-15 09:11:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-15 09:11:28,385 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 09:11:28,386 INFO L82 GeneralOperation]: Start isEquivalent. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 09:11:28,388 INFO L74 IsIncluded]: Start isIncluded. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 09:11:28,388 INFO L87 Difference]: Start difference. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 09:11:28,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:11:28,389 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-04-15 09:11:28,389 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-15 09:11:28,389 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:11:28,389 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:11:28,389 INFO L74 IsIncluded]: Start isIncluded. First operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 25 states. [2022-04-15 09:11:28,390 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 25 states. [2022-04-15 09:11:28,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:11:28,391 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-04-15 09:11:28,391 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-15 09:11:28,391 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:11:28,391 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:11:28,391 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 09:11:28,391 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 09:11:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-15 09:11:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-04-15 09:11:28,392 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2022-04-15 09:11:28,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 09:11:28,392 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-04-15 09:11:28,392 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-15 09:11:28,393 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 25 states and 27 transitions. [2022-04-15 09:11:28,415 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 27 edges. 27 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:11:28,415 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-15 09:11:28,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-15 09:11:28,416 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 09:11:28,416 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 09:11:28,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-15 09:11:28,631 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 [2022-04-15 09:11:28,632 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 09:11:28,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 09:11:28,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2022-04-15 09:11:28,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 09:11:28,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2041938742] [2022-04-15 09:11:30,234 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-15 09:11:30,234 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-15 09:11:30,234 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-15 09:11:30,234 INFO L85 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 2 times [2022-04-15 09:11:30,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 09:11:30,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783336842] [2022-04-15 09:11:30,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 09:11:30,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 09:11:30,243 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 09:11:30,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [974268211] [2022-04-15 09:11:30,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 09:11:30,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 09:11:30,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 09:11:30,244 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 09:11:30,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-15 09:11:30,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-15 09:11:30,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 09:11:30,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-15 09:11:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 09:11:30,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 09:11:30,375 INFO L272 TraceCheckUtils]: 0: Hoare triple {568#true} call ULTIMATE.init(); {568#true} is VALID [2022-04-15 09:11:30,376 INFO L290 TraceCheckUtils]: 1: Hoare triple {568#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {576#(<= ~counter~0 0)} is VALID [2022-04-15 09:11:30,376 INFO L290 TraceCheckUtils]: 2: Hoare triple {576#(<= ~counter~0 0)} assume true; {576#(<= ~counter~0 0)} is VALID [2022-04-15 09:11:30,377 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {576#(<= ~counter~0 0)} {568#true} #54#return; {576#(<= ~counter~0 0)} is VALID [2022-04-15 09:11:30,377 INFO L272 TraceCheckUtils]: 4: Hoare triple {576#(<= ~counter~0 0)} call #t~ret8 := main(); {576#(<= ~counter~0 0)} is VALID [2022-04-15 09:11:30,377 INFO L290 TraceCheckUtils]: 5: Hoare triple {576#(<= ~counter~0 0)} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {576#(<= ~counter~0 0)} is VALID [2022-04-15 09:11:30,378 INFO L290 TraceCheckUtils]: 6: Hoare triple {576#(<= ~counter~0 0)} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {592#(<= ~counter~0 1)} is VALID [2022-04-15 09:11:30,378 INFO L290 TraceCheckUtils]: 7: Hoare triple {592#(<= ~counter~0 1)} assume !!(#t~post7 < 20);havoc #t~post7; {592#(<= ~counter~0 1)} is VALID [2022-04-15 09:11:30,379 INFO L272 TraceCheckUtils]: 8: Hoare triple {592#(<= ~counter~0 1)} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {592#(<= ~counter~0 1)} is VALID [2022-04-15 09:11:30,379 INFO L290 TraceCheckUtils]: 9: Hoare triple {592#(<= ~counter~0 1)} ~cond := #in~cond; {592#(<= ~counter~0 1)} is VALID [2022-04-15 09:11:30,380 INFO L290 TraceCheckUtils]: 10: Hoare triple {592#(<= ~counter~0 1)} assume !(0 == ~cond); {592#(<= ~counter~0 1)} is VALID [2022-04-15 09:11:30,380 INFO L290 TraceCheckUtils]: 11: Hoare triple {592#(<= ~counter~0 1)} assume true; {592#(<= ~counter~0 1)} is VALID [2022-04-15 09:11:30,381 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {592#(<= ~counter~0 1)} {592#(<= ~counter~0 1)} #50#return; {592#(<= ~counter~0 1)} is VALID [2022-04-15 09:11:30,381 INFO L290 TraceCheckUtils]: 13: Hoare triple {592#(<= ~counter~0 1)} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {592#(<= ~counter~0 1)} is VALID [2022-04-15 09:11:30,381 INFO L290 TraceCheckUtils]: 14: Hoare triple {592#(<= ~counter~0 1)} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {617#(<= |main_#t~post7| 1)} is VALID [2022-04-15 09:11:30,382 INFO L290 TraceCheckUtils]: 15: Hoare triple {617#(<= |main_#t~post7| 1)} assume !(#t~post7 < 20);havoc #t~post7; {569#false} is VALID [2022-04-15 09:11:30,382 INFO L272 TraceCheckUtils]: 16: Hoare triple {569#false} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {569#false} is VALID [2022-04-15 09:11:30,382 INFO L290 TraceCheckUtils]: 17: Hoare triple {569#false} ~cond := #in~cond; {569#false} is VALID [2022-04-15 09:11:30,382 INFO L290 TraceCheckUtils]: 18: Hoare triple {569#false} assume 0 == ~cond; {569#false} is VALID [2022-04-15 09:11:30,382 INFO L290 TraceCheckUtils]: 19: Hoare triple {569#false} assume !false; {569#false} is VALID [2022-04-15 09:11:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 09:11:30,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-15 09:11:30,485 INFO L290 TraceCheckUtils]: 19: Hoare triple {569#false} assume !false; {569#false} is VALID [2022-04-15 09:11:30,486 INFO L290 TraceCheckUtils]: 18: Hoare triple {569#false} assume 0 == ~cond; {569#false} is VALID [2022-04-15 09:11:30,486 INFO L290 TraceCheckUtils]: 17: Hoare triple {569#false} ~cond := #in~cond; {569#false} is VALID [2022-04-15 09:11:30,486 INFO L272 TraceCheckUtils]: 16: Hoare triple {569#false} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {569#false} is VALID [2022-04-15 09:11:30,486 INFO L290 TraceCheckUtils]: 15: Hoare triple {645#(< |main_#t~post7| 20)} assume !(#t~post7 < 20);havoc #t~post7; {569#false} is VALID [2022-04-15 09:11:30,487 INFO L290 TraceCheckUtils]: 14: Hoare triple {649#(< ~counter~0 20)} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {645#(< |main_#t~post7| 20)} is VALID [2022-04-15 09:11:30,487 INFO L290 TraceCheckUtils]: 13: Hoare triple {649#(< ~counter~0 20)} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {649#(< ~counter~0 20)} is VALID [2022-04-15 09:11:30,488 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {568#true} {649#(< ~counter~0 20)} #50#return; {649#(< ~counter~0 20)} is VALID [2022-04-15 09:11:30,488 INFO L290 TraceCheckUtils]: 11: Hoare triple {568#true} assume true; {568#true} is VALID [2022-04-15 09:11:30,488 INFO L290 TraceCheckUtils]: 10: Hoare triple {568#true} assume !(0 == ~cond); {568#true} is VALID [2022-04-15 09:11:30,488 INFO L290 TraceCheckUtils]: 9: Hoare triple {568#true} ~cond := #in~cond; {568#true} is VALID [2022-04-15 09:11:30,488 INFO L272 TraceCheckUtils]: 8: Hoare triple {649#(< ~counter~0 20)} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {568#true} is VALID [2022-04-15 09:11:30,488 INFO L290 TraceCheckUtils]: 7: Hoare triple {649#(< ~counter~0 20)} assume !!(#t~post7 < 20);havoc #t~post7; {649#(< ~counter~0 20)} is VALID [2022-04-15 09:11:30,489 INFO L290 TraceCheckUtils]: 6: Hoare triple {674#(< ~counter~0 19)} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {649#(< ~counter~0 20)} is VALID [2022-04-15 09:11:30,489 INFO L290 TraceCheckUtils]: 5: Hoare triple {674#(< ~counter~0 19)} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {674#(< ~counter~0 19)} is VALID [2022-04-15 09:11:30,490 INFO L272 TraceCheckUtils]: 4: Hoare triple {674#(< ~counter~0 19)} call #t~ret8 := main(); {674#(< ~counter~0 19)} is VALID [2022-04-15 09:11:30,490 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {674#(< ~counter~0 19)} {568#true} #54#return; {674#(< ~counter~0 19)} is VALID [2022-04-15 09:11:30,490 INFO L290 TraceCheckUtils]: 2: Hoare triple {674#(< ~counter~0 19)} assume true; {674#(< ~counter~0 19)} is VALID [2022-04-15 09:11:30,491 INFO L290 TraceCheckUtils]: 1: Hoare triple {568#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {674#(< ~counter~0 19)} is VALID [2022-04-15 09:11:30,491 INFO L272 TraceCheckUtils]: 0: Hoare triple {568#true} call ULTIMATE.init(); {568#true} is VALID [2022-04-15 09:11:30,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 09:11:30,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 09:11:30,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783336842] [2022-04-15 09:11:30,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 09:11:30,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974268211] [2022-04-15 09:11:30,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974268211] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-15 09:11:30,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-15 09:11:30,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-15 09:11:30,492 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 09:11:30,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2041938742] [2022-04-15 09:11:30,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2041938742] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 09:11:30,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 09:11:30,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 09:11:30,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096648794] [2022-04-15 09:11:30,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 09:11:30,493 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 [2022-04-15 09:11:30,493 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 09:11:30,493 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 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) [2022-04-15 09:11:30,505 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 20 edges. 20 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:11:30,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-15 09:11:30,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 09:11:30,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-15 09:11:30,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-15 09:11:30,506 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) [2022-04-15 09:11:30,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:11:30,559 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-04-15 09:11:30,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-15 09:11:30,560 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 [2022-04-15 09:11:30,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 09:11:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2022-04-15 09:11:30,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 36 transitions. [2022-04-15 09:11:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2022-04-15 09:11:30,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 36 transitions. [2022-04-15 09:11:30,562 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 36 transitions. [2022-04-15 09:11:30,589 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 36 edges. 36 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:11:30,590 INFO L225 Difference]: With dead ends: 34 [2022-04-15 09:11:30,590 INFO L226 Difference]: Without dead ends: 27 [2022-04-15 09:11:30,591 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 [2022-04-15 09:11:30,592 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 09:11:30,592 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 09:11:30,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-15 09:11:30,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-15 09:11:30,607 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 09:11:30,607 INFO L82 GeneralOperation]: Start isEquivalent. First operand 27 states. Second 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) [2022-04-15 09:11:30,608 INFO L74 IsIncluded]: Start isIncluded. First operand 27 states. Second 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) [2022-04-15 09:11:30,609 INFO L87 Difference]: Start difference. First operand 27 states. Second 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) [2022-04-15 09:11:30,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:11:30,612 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-04-15 09:11:30,612 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-04-15 09:11:30,616 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:11:30,616 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:11:30,616 INFO L74 IsIncluded]: Start isIncluded. First 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) Second operand 27 states. [2022-04-15 09:11:30,616 INFO L87 Difference]: Start difference. First 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) Second operand 27 states. [2022-04-15 09:11:30,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:11:30,621 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-04-15 09:11:30,621 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-04-15 09:11:30,622 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:11:30,622 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:11:30,622 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 09:11:30,622 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 09:11:30,622 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) [2022-04-15 09:11:30,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-04-15 09:11:30,625 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2022-04-15 09:11:30,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 09:11:30,625 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-04-15 09:11:30,625 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) [2022-04-15 09:11:30,626 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 27 states and 29 transitions. [2022-04-15 09:11:30,647 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 29 edges. 29 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:11:30,648 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-04-15 09:11:30,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-15 09:11:30,648 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 09:11:30,648 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 09:11:30,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-15 09:11:30,864 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 [2022-04-15 09:11:30,865 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 09:11:30,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 09:11:30,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2022-04-15 09:11:30,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 09:11:30,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [574979105] [2022-04-15 09:11:32,704 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-15 09:11:32,704 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-15 09:11:32,704 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-15 09:11:32,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 2 times [2022-04-15 09:11:32,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 09:11:32,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378372204] [2022-04-15 09:11:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 09:11:32,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 09:11:32,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 09:11:32,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559455446] [2022-04-15 09:11:32,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 09:11:32,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 09:11:32,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 09:11:32,721 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 09:11:32,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-15 09:11:32,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-15 09:11:32,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 09:11:32,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-15 09:11:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 09:11:32,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 09:11:32,976 INFO L272 TraceCheckUtils]: 0: Hoare triple {873#true} call ULTIMATE.init(); {873#true} is VALID [2022-04-15 09:11:32,976 INFO L290 TraceCheckUtils]: 1: Hoare triple {873#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {873#true} is VALID [2022-04-15 09:11:32,976 INFO L290 TraceCheckUtils]: 2: Hoare triple {873#true} assume true; {873#true} is VALID [2022-04-15 09:11:32,976 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {873#true} {873#true} #54#return; {873#true} is VALID [2022-04-15 09:11:32,976 INFO L272 TraceCheckUtils]: 4: Hoare triple {873#true} call #t~ret8 := main(); {873#true} is VALID [2022-04-15 09:11:32,977 INFO L290 TraceCheckUtils]: 5: Hoare triple {873#true} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-15 09:11:32,977 INFO L290 TraceCheckUtils]: 6: Hoare triple {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-15 09:11:32,977 INFO L290 TraceCheckUtils]: 7: Hoare triple {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} assume !!(#t~post7 < 20);havoc #t~post7; {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-15 09:11:32,978 INFO L272 TraceCheckUtils]: 8: Hoare triple {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {873#true} is VALID [2022-04-15 09:11:32,978 INFO L290 TraceCheckUtils]: 9: Hoare triple {873#true} ~cond := #in~cond; {906#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-15 09:11:32,978 INFO L290 TraceCheckUtils]: 10: Hoare triple {906#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {910#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:11:32,979 INFO L290 TraceCheckUtils]: 11: Hoare triple {910#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {910#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:11:32,979 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {910#(not (= |__VERIFIER_assert_#in~cond| 0))} {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} #50#return; {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-15 09:11:32,980 INFO L290 TraceCheckUtils]: 13: Hoare triple {893#(and (= main_~y~0 1) (= main_~a~0 main_~x~0) (= (* main_~a~0 main_~z~0) main_~az~0))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {920#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-15 09:11:32,980 INFO L290 TraceCheckUtils]: 14: Hoare triple {920#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= (* main_~a~0 main_~z~0) main_~az~0))} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {920#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-15 09:11:32,981 INFO L290 TraceCheckUtils]: 15: Hoare triple {920#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= (* main_~a~0 main_~z~0) main_~az~0))} assume !!(#t~post7 < 20);havoc #t~post7; {920#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= (* main_~a~0 main_~z~0) main_~az~0))} is VALID [2022-04-15 09:11:33,049 INFO L272 TraceCheckUtils]: 16: Hoare triple {920#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= (* main_~a~0 main_~z~0) main_~az~0))} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {930#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 09:11:33,049 INFO L290 TraceCheckUtils]: 17: Hoare triple {930#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {934#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 09:11:33,049 INFO L290 TraceCheckUtils]: 18: Hoare triple {934#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {874#false} is VALID [2022-04-15 09:11:33,050 INFO L290 TraceCheckUtils]: 19: Hoare triple {874#false} assume !false; {874#false} is VALID [2022-04-15 09:11:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 09:11:33,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-15 09:11:42,830 INFO L290 TraceCheckUtils]: 19: Hoare triple {874#false} assume !false; {874#false} is VALID [2022-04-15 09:11:42,830 INFO L290 TraceCheckUtils]: 18: Hoare triple {934#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {874#false} is VALID [2022-04-15 09:11:42,831 INFO L290 TraceCheckUtils]: 17: Hoare triple {930#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {934#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 09:11:42,831 INFO L272 TraceCheckUtils]: 16: Hoare triple {950#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {930#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 09:11:42,832 INFO L290 TraceCheckUtils]: 15: Hoare triple {950#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} assume !!(#t~post7 < 20);havoc #t~post7; {950#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-15 09:11:42,833 INFO L290 TraceCheckUtils]: 14: Hoare triple {950#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {950#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-15 09:11:42,847 INFO L290 TraceCheckUtils]: 13: Hoare triple {960#(= (+ (* main_~z~0 main_~x~0) main_~a~0 (* main_~az~0 (* main_~z~0 main_~y~0))) (+ main_~a~0 (* main_~z~0 (+ (* main_~z~0 main_~x~0) main_~a~0))))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {950#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-15 09:11:42,850 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {910#(not (= |__VERIFIER_assert_#in~cond| 0))} {873#true} #50#return; {960#(= (+ (* main_~z~0 main_~x~0) main_~a~0 (* main_~az~0 (* main_~z~0 main_~y~0))) (+ main_~a~0 (* main_~z~0 (+ (* main_~z~0 main_~x~0) main_~a~0))))} is VALID [2022-04-15 09:11:42,851 INFO L290 TraceCheckUtils]: 11: Hoare triple {910#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {910#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:11:42,853 INFO L290 TraceCheckUtils]: 10: Hoare triple {973#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} assume !(0 == ~cond); {910#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:11:42,854 INFO L290 TraceCheckUtils]: 9: Hoare triple {873#true} ~cond := #in~cond; {973#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-15 09:11:42,854 INFO L272 TraceCheckUtils]: 8: Hoare triple {873#true} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {873#true} is VALID [2022-04-15 09:11:42,854 INFO L290 TraceCheckUtils]: 7: Hoare triple {873#true} assume !!(#t~post7 < 20);havoc #t~post7; {873#true} is VALID [2022-04-15 09:11:42,854 INFO L290 TraceCheckUtils]: 6: Hoare triple {873#true} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {873#true} is VALID [2022-04-15 09:11:42,854 INFO L290 TraceCheckUtils]: 5: Hoare triple {873#true} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {873#true} is VALID [2022-04-15 09:11:42,854 INFO L272 TraceCheckUtils]: 4: Hoare triple {873#true} call #t~ret8 := main(); {873#true} is VALID [2022-04-15 09:11:42,854 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {873#true} {873#true} #54#return; {873#true} is VALID [2022-04-15 09:11:42,855 INFO L290 TraceCheckUtils]: 2: Hoare triple {873#true} assume true; {873#true} is VALID [2022-04-15 09:11:42,855 INFO L290 TraceCheckUtils]: 1: Hoare triple {873#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {873#true} is VALID [2022-04-15 09:11:42,855 INFO L272 TraceCheckUtils]: 0: Hoare triple {873#true} call ULTIMATE.init(); {873#true} is VALID [2022-04-15 09:11:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 09:11:42,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 09:11:42,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378372204] [2022-04-15 09:11:42,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 09:11:42,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559455446] [2022-04-15 09:11:42,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559455446] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-15 09:11:42,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-15 09:11:42,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-04-15 09:11:42,856 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 09:11:42,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [574979105] [2022-04-15 09:11:42,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [574979105] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 09:11:42,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 09:11:42,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-15 09:11:42,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464895336] [2022-04-15 09:11:42,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 09:11:42,857 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 [2022-04-15 09:11:42,857 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 09:11:42,857 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 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) [2022-04-15 09:11:42,894 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 20 edges. 20 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:11:42,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-15 09:11:42,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 09:11:42,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-15 09:11:42,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-15 09:11:42,895 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) [2022-04-15 09:11:43,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:11:43,627 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-04-15 09:11:43,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-15 09:11:43,627 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 [2022-04-15 09:11:43,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 09:11:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2022-04-15 09:11:43,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 36 transitions. [2022-04-15 09:11:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2022-04-15 09:11:43,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 36 transitions. [2022-04-15 09:11:43,630 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 8 states and 36 transitions. [2022-04-15 09:11:43,690 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 36 edges. 36 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:11:43,691 INFO L225 Difference]: With dead ends: 36 [2022-04-15 09:11:43,691 INFO L226 Difference]: Without dead ends: 33 [2022-04-15 09:11:43,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-15 09:11:43,692 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-15 09:11:43,692 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 79 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-15 09:11:43,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-15 09:11:43,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-15 09:11:43,708 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 09:11:43,708 INFO L82 GeneralOperation]: Start isEquivalent. First operand 33 states. Second 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) [2022-04-15 09:11:43,708 INFO L74 IsIncluded]: Start isIncluded. First operand 33 states. Second 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) [2022-04-15 09:11:43,708 INFO L87 Difference]: Start difference. First operand 33 states. Second 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) [2022-04-15 09:11:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:11:43,709 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-04-15 09:11:43,709 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-15 09:11:43,709 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:11:43,709 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:11:43,710 INFO L74 IsIncluded]: Start isIncluded. First 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) Second operand 33 states. [2022-04-15 09:11:43,710 INFO L87 Difference]: Start difference. First 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) Second operand 33 states. [2022-04-15 09:11:43,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:11:43,711 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-04-15 09:11:43,711 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-15 09:11:43,711 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:11:43,711 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:11:43,711 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 09:11:43,711 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 09:11:43,711 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) [2022-04-15 09:11:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-04-15 09:11:43,712 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2022-04-15 09:11:43,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 09:11:43,712 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-04-15 09:11:43,712 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) [2022-04-15 09:11:43,713 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 33 states and 35 transitions. [2022-04-15 09:11:43,748 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 35 edges. 35 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:11:43,749 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-15 09:11:43,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-15 09:11:43,749 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 09:11:43,749 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 09:11:43,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-15 09:11:43,949 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 [2022-04-15 09:11:43,950 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 09:11:43,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 09:11:43,950 INFO L85 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 3 times [2022-04-15 09:11:43,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 09:11:43,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2137412066] [2022-04-15 09:11:47,163 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-15 09:11:47,163 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-15 09:11:47,163 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-15 09:11:47,163 INFO L85 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 4 times [2022-04-15 09:11:47,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 09:11:47,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994693701] [2022-04-15 09:11:47,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 09:11:47,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 09:11:47,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 09:11:47,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529230122] [2022-04-15 09:11:47,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-15 09:11:47,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 09:11:47,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 09:11:47,177 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 09:11:47,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-15 09:11:47,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-15 09:11:47,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 09:11:47,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-15 09:11:49,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2022-04-15 09:11:49,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 09:11:58,376 WARN L914 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-15 09:12:05,062 WARN L914 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-15 09:12:14,599 WARN L914 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-15 09:12:27,080 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 [2022-04-15 09:13:56,284 WARN L232 SmtUtils]: Spent 45.40s on a formula simplification. DAG size of input: 47 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-15 09:14:07,147 WARN L914 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-15 09:14:11,454 WARN L914 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-15 09:14:15,561 WARN L914 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-15 09:14:19,599 WARN L914 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-15 09:14:56,132 WARN L232 SmtUtils]: Spent 16.72s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-15 09:15:14,671 INFO L272 TraceCheckUtils]: 0: Hoare triple {1211#true} call ULTIMATE.init(); {1211#true} is VALID [2022-04-15 09:15:14,671 INFO L290 TraceCheckUtils]: 1: Hoare triple {1211#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {1211#true} is VALID [2022-04-15 09:15:14,671 INFO L290 TraceCheckUtils]: 2: Hoare triple {1211#true} assume true; {1211#true} is VALID [2022-04-15 09:15:14,672 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1211#true} {1211#true} #54#return; {1211#true} is VALID [2022-04-15 09:15:14,672 INFO L272 TraceCheckUtils]: 4: Hoare triple {1211#true} call #t~ret8 := main(); {1211#true} is VALID [2022-04-15 09:15:14,672 INFO L290 TraceCheckUtils]: 5: Hoare triple {1211#true} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {1211#true} is VALID [2022-04-15 09:15:14,672 INFO L290 TraceCheckUtils]: 6: Hoare triple {1211#true} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1211#true} is VALID [2022-04-15 09:15:14,672 INFO L290 TraceCheckUtils]: 7: Hoare triple {1211#true} assume !!(#t~post7 < 20);havoc #t~post7; {1211#true} is VALID [2022-04-15 09:15:14,672 INFO L272 TraceCheckUtils]: 8: Hoare triple {1211#true} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1211#true} is VALID [2022-04-15 09:15:14,686 INFO L290 TraceCheckUtils]: 9: Hoare triple {1211#true} ~cond := #in~cond; {1243#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-15 09:15:14,687 INFO L290 TraceCheckUtils]: 10: Hoare triple {1243#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:15:14,697 INFO L290 TraceCheckUtils]: 11: Hoare triple {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:15:14,698 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} {1211#true} #50#return; {1254#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-15 09:15:16,714 WARN L290 TraceCheckUtils]: 13: Hoare triple {1254#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {1258#(or (and (= main_~z~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ main_~a~0 (* v_main_~x~0_29 main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 main_~az~0)))) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (or (and (= (mod main_~y~0 main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))) (and (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0))) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0))))} is UNKNOWN [2022-04-15 09:15:16,716 INFO L290 TraceCheckUtils]: 14: Hoare triple {1258#(or (and (= main_~z~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ main_~a~0 (* v_main_~x~0_29 main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 main_~az~0)))) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (or (and (= (mod main_~y~0 main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))) (and (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0))) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0))))} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1258#(or (and (= main_~z~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ main_~a~0 (* v_main_~x~0_29 main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 main_~az~0)))) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (or (and (= (mod main_~y~0 main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))) (and (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0))) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0))))} is VALID [2022-04-15 09:15:16,733 INFO L290 TraceCheckUtils]: 15: Hoare triple {1258#(or (and (= main_~z~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ main_~a~0 (* v_main_~x~0_29 main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 main_~az~0)))) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (or (and (= (mod main_~y~0 main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))) (and (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0))) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0))))} assume !!(#t~post7 < 20);havoc #t~post7; {1258#(or (and (= main_~z~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ main_~a~0 (* v_main_~x~0_29 main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 main_~az~0)))) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (or (and (= (mod main_~y~0 main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))) (and (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0))) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0))))} is VALID [2022-04-15 09:15:16,734 INFO L272 TraceCheckUtils]: 16: Hoare triple {1258#(or (and (= main_~z~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ main_~a~0 (* v_main_~x~0_29 main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 main_~az~0)))) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (or (and (= (mod main_~y~0 main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))) (and (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0))) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0))))} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1211#true} is VALID [2022-04-15 09:15:16,734 INFO L290 TraceCheckUtils]: 17: Hoare triple {1211#true} ~cond := #in~cond; {1243#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-15 09:15:16,734 INFO L290 TraceCheckUtils]: 18: Hoare triple {1243#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:15:16,735 INFO L290 TraceCheckUtils]: 19: Hoare triple {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:15:16,740 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} {1258#(or (and (= main_~z~0 0) (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ main_~a~0 (* v_main_~x~0_29 main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 main_~az~0)))) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (or (and (= (mod main_~y~0 main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))) (and (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0))) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0))))} #50#return; {1280#(and (or (and (or (and (= (mod main_~y~0 main_~z~0) 0) (= (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (+ main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))) (and (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0))) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0))) (and (= main_~y~0 0) (= main_~a~0 main_~x~0))) (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)))} is VALID [2022-04-15 09:15:18,744 WARN L290 TraceCheckUtils]: 21: Hoare triple {1280#(and (or (and (or (and (= (mod main_~y~0 main_~z~0) 0) (= (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (+ main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)))) (and (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0))) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0))) (and (= main_~y~0 0) (= main_~a~0 main_~x~0))) (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {1284#(or (and (= main_~a~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (or (and (= (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) (* main_~z~0 (div (+ (* (- 1) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0))) main_~az~0))) (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0)) (and (= (mod main_~y~0 main_~z~0) 0) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0))))) (not (= main_~z~0 0))))} is UNKNOWN [2022-04-15 09:15:18,746 INFO L290 TraceCheckUtils]: 22: Hoare triple {1284#(or (and (= main_~a~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (or (and (= (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) (* main_~z~0 (div (+ (* (- 1) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0))) main_~az~0))) (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0)) (and (= (mod main_~y~0 main_~z~0) 0) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0))))) (not (= main_~z~0 0))))} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1284#(or (and (= main_~a~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (or (and (= (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) (* main_~z~0 (div (+ (* (- 1) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0))) main_~az~0))) (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0)) (and (= (mod main_~y~0 main_~z~0) 0) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0))))) (not (= main_~z~0 0))))} is VALID [2022-04-15 09:15:18,748 INFO L290 TraceCheckUtils]: 23: Hoare triple {1284#(or (and (= main_~a~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (or (and (= (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) (* main_~z~0 (div (+ (* (- 1) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0))) main_~az~0))) (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0)) (and (= (mod main_~y~0 main_~z~0) 0) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0))))) (not (= main_~z~0 0))))} assume !(#t~post7 < 20);havoc #t~post7; {1284#(or (and (= main_~a~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (or (and (= (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) (* main_~z~0 (div (+ (* (- 1) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0))) main_~az~0))) (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0)) (and (= (mod main_~y~0 main_~z~0) 0) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0))))) (not (= main_~z~0 0))))} is VALID [2022-04-15 09:15:18,830 INFO L272 TraceCheckUtils]: 24: Hoare triple {1284#(or (and (= main_~a~0 (+ (* main_~a~0 main_~z~0) main_~a~0)) (= main_~y~0 0) (= (+ (* (- 1) main_~a~0) main_~x~0) 0)) (and (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (or (and (= (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) (* main_~z~0 (div (+ (* (- 1) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0))) main_~az~0))) (= (mod (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) main_~az~0) main_~z~0) main_~y~0)) (and (= (mod main_~y~0 main_~z~0) 0) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= main_~az~0 0) (= 0 (+ (* (- 1) (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0))))) (not (= main_~z~0 0))))} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1294#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 09:15:18,831 INFO L290 TraceCheckUtils]: 25: Hoare triple {1294#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {1298#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 09:15:18,831 INFO L290 TraceCheckUtils]: 26: Hoare triple {1298#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {1212#false} is VALID [2022-04-15 09:15:18,832 INFO L290 TraceCheckUtils]: 27: Hoare triple {1212#false} assume !false; {1212#false} is VALID [2022-04-15 09:15:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2022-04-15 09:15:18,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-15 09:15:26,276 INFO L290 TraceCheckUtils]: 27: Hoare triple {1212#false} assume !false; {1212#false} is VALID [2022-04-15 09:15:26,277 INFO L290 TraceCheckUtils]: 26: Hoare triple {1298#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {1212#false} is VALID [2022-04-15 09:15:26,277 INFO L290 TraceCheckUtils]: 25: Hoare triple {1294#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {1298#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 09:15:26,278 INFO L272 TraceCheckUtils]: 24: Hoare triple {1254#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1294#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 09:15:26,278 INFO L290 TraceCheckUtils]: 23: Hoare triple {1254#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} assume !(#t~post7 < 20);havoc #t~post7; {1254#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-15 09:15:26,278 INFO L290 TraceCheckUtils]: 22: Hoare triple {1254#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1254#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-15 09:15:26,308 INFO L290 TraceCheckUtils]: 21: Hoare triple {1323#(= (+ (* main_~z~0 main_~x~0) main_~a~0 (* main_~az~0 (* main_~z~0 main_~y~0))) (+ main_~a~0 (* main_~z~0 (+ (* main_~z~0 main_~x~0) main_~a~0))))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {1254#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-15 09:15:26,312 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} {1211#true} #50#return; {1323#(= (+ (* main_~z~0 main_~x~0) main_~a~0 (* main_~az~0 (* main_~z~0 main_~y~0))) (+ main_~a~0 (* main_~z~0 (+ (* main_~z~0 main_~x~0) main_~a~0))))} is VALID [2022-04-15 09:15:26,312 INFO L290 TraceCheckUtils]: 19: Hoare triple {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:15:26,312 INFO L290 TraceCheckUtils]: 18: Hoare triple {1336#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} assume !(0 == ~cond); {1247#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:15:26,313 INFO L290 TraceCheckUtils]: 17: Hoare triple {1211#true} ~cond := #in~cond; {1336#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-15 09:15:26,313 INFO L272 TraceCheckUtils]: 16: Hoare triple {1211#true} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1211#true} is VALID [2022-04-15 09:15:26,313 INFO L290 TraceCheckUtils]: 15: Hoare triple {1211#true} assume !!(#t~post7 < 20);havoc #t~post7; {1211#true} is VALID [2022-04-15 09:15:26,313 INFO L290 TraceCheckUtils]: 14: Hoare triple {1211#true} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1211#true} is VALID [2022-04-15 09:15:26,313 INFO L290 TraceCheckUtils]: 13: Hoare triple {1211#true} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {1211#true} is VALID [2022-04-15 09:15:26,313 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {1211#true} {1211#true} #50#return; {1211#true} is VALID [2022-04-15 09:15:26,313 INFO L290 TraceCheckUtils]: 11: Hoare triple {1211#true} assume true; {1211#true} is VALID [2022-04-15 09:15:26,313 INFO L290 TraceCheckUtils]: 10: Hoare triple {1211#true} assume !(0 == ~cond); {1211#true} is VALID [2022-04-15 09:15:26,313 INFO L290 TraceCheckUtils]: 9: Hoare triple {1211#true} ~cond := #in~cond; {1211#true} is VALID [2022-04-15 09:15:26,313 INFO L272 TraceCheckUtils]: 8: Hoare triple {1211#true} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1211#true} is VALID [2022-04-15 09:15:26,314 INFO L290 TraceCheckUtils]: 7: Hoare triple {1211#true} assume !!(#t~post7 < 20);havoc #t~post7; {1211#true} is VALID [2022-04-15 09:15:26,314 INFO L290 TraceCheckUtils]: 6: Hoare triple {1211#true} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1211#true} is VALID [2022-04-15 09:15:26,314 INFO L290 TraceCheckUtils]: 5: Hoare triple {1211#true} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {1211#true} is VALID [2022-04-15 09:15:26,314 INFO L272 TraceCheckUtils]: 4: Hoare triple {1211#true} call #t~ret8 := main(); {1211#true} is VALID [2022-04-15 09:15:26,314 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1211#true} {1211#true} #54#return; {1211#true} is VALID [2022-04-15 09:15:26,314 INFO L290 TraceCheckUtils]: 2: Hoare triple {1211#true} assume true; {1211#true} is VALID [2022-04-15 09:15:26,314 INFO L290 TraceCheckUtils]: 1: Hoare triple {1211#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {1211#true} is VALID [2022-04-15 09:15:26,314 INFO L272 TraceCheckUtils]: 0: Hoare triple {1211#true} call ULTIMATE.init(); {1211#true} is VALID [2022-04-15 09:15:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-15 09:15:26,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 09:15:26,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994693701] [2022-04-15 09:15:26,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 09:15:26,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529230122] [2022-04-15 09:15:26,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529230122] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-15 09:15:26,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-15 09:15:26,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2022-04-15 09:15:26,315 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 09:15:26,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2137412066] [2022-04-15 09:15:26,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2137412066] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 09:15:26,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 09:15:26,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-15 09:15:26,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236355783] [2022-04-15 09:15:26,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 09:15:26,316 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 [2022-04-15 09:15:26,316 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 09:15:26,316 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 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) [2022-04-15 09:15:32,350 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 25 edges. 22 inductive. 0 not inductive. 3 times theorem prover too weak to decide inductivity. [2022-04-15 09:15:32,350 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-15 09:15:32,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 09:15:32,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-15 09:15:32,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=80, Unknown=3, NotChecked=18, Total=132 [2022-04-15 09:15:32,351 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) [2022-04-15 09:15:38,020 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-15 09:15:40,032 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-15 09:15:42,088 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse12 (* (- 1) c_main_~a~0))) (let ((.cse15 (+ .cse12 c_main_~x~0))) (let ((.cse13 (div .cse15 c_main_~z~0))) (let ((.cse16 (+ (* .cse13 c_main_~z~0) (* (- 1) .cse13) c_main_~a~0))) (let ((.cse9 (= c_main_~z~0 0)) (.cse2 (= c_main_~az~0 0)) (.cse14 (div .cse16 c_main_~az~0))) (let ((.cse4 (= (* .cse14 c_main_~z~0) c_main_~y~0)) (.cse5 (not .cse2)) (.cse6 (= (mod .cse16 c_main_~az~0) 0)) (.cse1 (= (mod c_main_~y~0 c_main_~z~0) 0)) (.cse3 (= .cse16 0)) (.cse0 (= (mod .cse15 c_main_~z~0) 0)) (.cse7 (not .cse9)) (.cse8 (= c_main_~y~0 0)) (.cse10 (= 0 .cse15))) (and (or (and .cse0 (or (and .cse1 .cse2 .cse3) (and .cse4 .cse5 .cse6)) .cse7) (and .cse8 (exists ((v_main_~x~0_29 Int) (v_main_~y~0_28 Int)) (= (+ c_main_~a~0 (* v_main_~x~0_29 c_main_~z~0)) (+ v_main_~x~0_29 (* v_main_~y~0_28 c_main_~az~0)))) .cse9 .cse10)) (or (and (or (and .cse4 .cse5 .cse6 (= (* (div (let ((.cse11 (div (+ .cse12 .cse13) c_main_~z~0))) (+ (* .cse11 c_main_~z~0) (* (- 1) .cse11) c_main_~a~0)) c_main_~az~0) c_main_~z~0) .cse14)) (and .cse1 .cse2 (= 0 (mod (div c_main_~y~0 c_main_~z~0) c_main_~z~0)) .cse3)) .cse0 .cse7) (and (= (+ (* c_main_~a~0 c_main_~z~0) c_main_~a~0) c_main_~a~0) .cse8 .cse10))))))))) is different from false [2022-04-15 09:15:45,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-15 09:15:45,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:15:45,908 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-04-15 09:15:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-15 09:15:45,908 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 [2022-04-15 09:15:45,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 09:15:45,908 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2022-04-15 09:15:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 32 transitions. [2022-04-15 09:15:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2022-04-15 09:15:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 32 transitions. [2022-04-15 09:15:45,910 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 11 states and 32 transitions. [2022-04-15 09:15:51,964 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 32 edges. 29 inductive. 0 not inductive. 3 times theorem prover too weak to decide inductivity. [2022-04-15 09:15:51,965 INFO L225 Difference]: With dead ends: 40 [2022-04-15 09:15:51,965 INFO L226 Difference]: Without dead ends: 32 [2022-04-15 09:15:51,965 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 77.5s TimeCoverageRelationStatistics Valid=46, Invalid=114, Unknown=4, NotChecked=46, Total=210 [2022-04-15 09:15:51,966 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-04-15 09:15:51,966 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 86 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 3 Unknown, 21 Unchecked, 7.0s Time] [2022-04-15 09:15:51,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-15 09:15:51,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-04-15 09:15:51,989 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 09:15:51,989 INFO L82 GeneralOperation]: Start isEquivalent. First operand 32 states. Second operand has 31 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 09:15:51,989 INFO L74 IsIncluded]: Start isIncluded. First operand 32 states. Second operand has 31 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 09:15:51,989 INFO L87 Difference]: Start difference. First operand 32 states. Second operand has 31 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 09:15:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:15:51,990 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-04-15 09:15:51,990 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-04-15 09:15:51,990 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:15:51,991 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:15:51,991 INFO L74 IsIncluded]: Start isIncluded. First operand has 31 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand 32 states. [2022-04-15 09:15:51,991 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand 32 states. [2022-04-15 09:15:51,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:15:51,992 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-04-15 09:15:51,992 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2022-04-15 09:15:51,992 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:15:51,992 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:15:51,992 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 09:15:51,992 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 09:15:51,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 09:15:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-04-15 09:15:51,993 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2022-04-15 09:15:51,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 09:15:51,993 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-04-15 09:15:51,993 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) [2022-04-15 09:15:51,993 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 31 states and 31 transitions. [2022-04-15 09:15:56,054 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 31 edges. 29 inductive. 0 not inductive. 2 times theorem prover too weak to decide inductivity. [2022-04-15 09:15:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-04-15 09:15:56,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-15 09:15:56,054 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 09:15:56,054 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 09:15:56,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-15 09:15:56,255 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 [2022-04-15 09:15:56,255 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 09:15:56,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 09:15:56,255 INFO L85 PathProgramCache]: Analyzing trace with hash -694393736, now seen corresponding path program 3 times [2022-04-15 09:15:56,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 09:15:56,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1414312687] [2022-04-15 09:15:56,300 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-15 09:15:56,300 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-15 09:15:56,300 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-15 09:15:56,300 INFO L85 PathProgramCache]: Analyzing trace with hash -694393736, now seen corresponding path program 4 times [2022-04-15 09:15:56,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 09:15:56,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799727875] [2022-04-15 09:15:56,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 09:15:56,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 09:15:56,308 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 09:15:56,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097032474] [2022-04-15 09:15:56,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-15 09:15:56,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 09:15:56,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 09:15:56,309 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 09:15:56,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-15 09:15:56,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-15 09:15:56,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 09:15:56,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-15 09:15:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 09:15:56,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 09:16:07,628 WARN L914 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-15 09:16:13,431 WARN L914 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-15 09:16:15,483 WARN L914 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-15 09:16:31,969 WARN L914 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-15 09:16:37,980 WARN L914 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-15 09:16:40,028 WARN L914 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-15 09:16:41,139 INFO L272 TraceCheckUtils]: 0: Hoare triple {1603#true} call ULTIMATE.init(); {1603#true} is VALID [2022-04-15 09:16:41,139 INFO L290 TraceCheckUtils]: 1: Hoare triple {1603#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {1603#true} is VALID [2022-04-15 09:16:41,139 INFO L290 TraceCheckUtils]: 2: Hoare triple {1603#true} assume true; {1603#true} is VALID [2022-04-15 09:16:41,139 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1603#true} {1603#true} #54#return; {1603#true} is VALID [2022-04-15 09:16:41,139 INFO L272 TraceCheckUtils]: 4: Hoare triple {1603#true} call #t~ret8 := main(); {1603#true} is VALID [2022-04-15 09:16:41,139 INFO L290 TraceCheckUtils]: 5: Hoare triple {1603#true} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {1603#true} is VALID [2022-04-15 09:16:41,140 INFO L290 TraceCheckUtils]: 6: Hoare triple {1603#true} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1603#true} is VALID [2022-04-15 09:16:41,140 INFO L290 TraceCheckUtils]: 7: Hoare triple {1603#true} assume !!(#t~post7 < 20);havoc #t~post7; {1603#true} is VALID [2022-04-15 09:16:41,140 INFO L272 TraceCheckUtils]: 8: Hoare triple {1603#true} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1603#true} is VALID [2022-04-15 09:16:41,140 INFO L290 TraceCheckUtils]: 9: Hoare triple {1603#true} ~cond := #in~cond; {1635#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-15 09:16:41,140 INFO L290 TraceCheckUtils]: 10: Hoare triple {1635#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {1639#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:16:41,141 INFO L290 TraceCheckUtils]: 11: Hoare triple {1639#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {1639#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:16:41,142 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {1639#(not (= |__VERIFIER_assert_#in~cond| 0))} {1603#true} #50#return; {1646#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-15 09:16:43,143 WARN L290 TraceCheckUtils]: 13: Hoare triple {1646#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {1650#(or (and (= (mod main_~y~0 main_~z~0) 0) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0)) (= (+ main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* main_~az~0 (div main_~y~0 main_~z~0))))) (and (= main_~z~0 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)))} is UNKNOWN [2022-04-15 09:16:43,147 INFO L290 TraceCheckUtils]: 14: Hoare triple {1650#(or (and (= (mod main_~y~0 main_~z~0) 0) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0)) (= (+ main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* main_~az~0 (div main_~y~0 main_~z~0))))) (and (= main_~z~0 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)))} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1650#(or (and (= (mod main_~y~0 main_~z~0) 0) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0)) (= (+ main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* main_~az~0 (div main_~y~0 main_~z~0))))) (and (= main_~z~0 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)))} is VALID [2022-04-15 09:16:43,148 INFO L290 TraceCheckUtils]: 15: Hoare triple {1650#(or (and (= (mod main_~y~0 main_~z~0) 0) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0)) (= (+ main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* main_~az~0 (div main_~y~0 main_~z~0))))) (and (= main_~z~0 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)))} assume !!(#t~post7 < 20);havoc #t~post7; {1650#(or (and (= (mod main_~y~0 main_~z~0) 0) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0)) (= (+ main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* main_~az~0 (div main_~y~0 main_~z~0))))) (and (= main_~z~0 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)))} is VALID [2022-04-15 09:16:43,148 INFO L272 TraceCheckUtils]: 16: Hoare triple {1650#(or (and (= (mod main_~y~0 main_~z~0) 0) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0)) (= (+ main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* main_~az~0 (div main_~y~0 main_~z~0))))) (and (= main_~z~0 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)))} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1603#true} is VALID [2022-04-15 09:16:43,148 INFO L290 TraceCheckUtils]: 17: Hoare triple {1603#true} ~cond := #in~cond; {1635#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-15 09:16:43,149 INFO L290 TraceCheckUtils]: 18: Hoare triple {1635#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {1639#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:16:43,149 INFO L290 TraceCheckUtils]: 19: Hoare triple {1639#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {1639#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:16:43,149 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {1639#(not (= |__VERIFIER_assert_#in~cond| 0))} {1650#(or (and (= (mod main_~y~0 main_~z~0) 0) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0)) (= (+ main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* main_~az~0 (div main_~y~0 main_~z~0))))) (and (= main_~z~0 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)))} #50#return; {1650#(or (and (= (mod main_~y~0 main_~z~0) 0) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0)) (= (+ main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* main_~az~0 (div main_~y~0 main_~z~0))))) (and (= main_~z~0 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)))} is VALID [2022-04-15 09:16:45,151 WARN L290 TraceCheckUtils]: 21: Hoare triple {1650#(or (and (= (mod main_~y~0 main_~z~0) 0) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (not (= main_~z~0 0)) (= (+ main_~a~0 (* (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) main_~z~0)) (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* main_~az~0 (div main_~y~0 main_~z~0))))) (and (= main_~z~0 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {1675#(or (and (= (mod main_~y~0 main_~z~0) 0) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= (mod (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0) 0) (= (+ (* (div (div main_~y~0 main_~z~0) main_~z~0) main_~az~0) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) (+ main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)))) (not (= main_~z~0 0))) (and (= main_~z~0 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)))} is UNKNOWN [2022-04-15 09:16:45,153 INFO L290 TraceCheckUtils]: 22: Hoare triple {1675#(or (and (= (mod main_~y~0 main_~z~0) 0) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= (mod (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0) 0) (= (+ (* (div (div main_~y~0 main_~z~0) main_~z~0) main_~az~0) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) (+ main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)))) (not (= main_~z~0 0))) (and (= main_~z~0 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)))} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1675#(or (and (= (mod main_~y~0 main_~z~0) 0) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= (mod (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0) 0) (= (+ (* (div (div main_~y~0 main_~z~0) main_~z~0) main_~az~0) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) (+ main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)))) (not (= main_~z~0 0))) (and (= main_~z~0 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)))} is VALID [2022-04-15 09:16:45,154 INFO L290 TraceCheckUtils]: 23: Hoare triple {1675#(or (and (= (mod main_~y~0 main_~z~0) 0) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= (mod (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0) 0) (= (+ (* (div (div main_~y~0 main_~z~0) main_~z~0) main_~az~0) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) (+ main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)))) (not (= main_~z~0 0))) (and (= main_~z~0 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)))} assume !!(#t~post7 < 20);havoc #t~post7; {1675#(or (and (= (mod main_~y~0 main_~z~0) 0) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= (mod (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0) 0) (= (+ (* (div (div main_~y~0 main_~z~0) main_~z~0) main_~az~0) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) (+ main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)))) (not (= main_~z~0 0))) (and (= main_~z~0 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)))} is VALID [2022-04-15 09:16:45,253 INFO L272 TraceCheckUtils]: 24: Hoare triple {1675#(or (and (= (mod main_~y~0 main_~z~0) 0) (= 0 (mod (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0)) (= (mod (div main_~y~0 main_~z~0) main_~z~0) 0) (= (mod (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0) 0) (= (+ (* (div (div main_~y~0 main_~z~0) main_~z~0) main_~az~0) (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)) (+ main_~a~0 (* main_~z~0 (div (+ (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0) (* (- 1) main_~a~0)) main_~z~0)))) (not (= main_~z~0 0))) (and (= main_~z~0 0) (= main_~y~0 0) (= main_~a~0 main_~x~0)))} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1685#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 09:16:45,254 INFO L290 TraceCheckUtils]: 25: Hoare triple {1685#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {1689#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 09:16:45,254 INFO L290 TraceCheckUtils]: 26: Hoare triple {1689#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {1604#false} is VALID [2022-04-15 09:16:45,254 INFO L290 TraceCheckUtils]: 27: Hoare triple {1604#false} assume !false; {1604#false} is VALID [2022-04-15 09:16:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-15 09:16:45,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-15 09:16:56,301 INFO L290 TraceCheckUtils]: 27: Hoare triple {1604#false} assume !false; {1604#false} is VALID [2022-04-15 09:16:56,304 INFO L290 TraceCheckUtils]: 26: Hoare triple {1689#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {1604#false} is VALID [2022-04-15 09:16:56,305 INFO L290 TraceCheckUtils]: 25: Hoare triple {1685#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {1689#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 09:16:56,305 INFO L272 TraceCheckUtils]: 24: Hoare triple {1646#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1685#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 09:16:56,306 INFO L290 TraceCheckUtils]: 23: Hoare triple {1646#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} assume !!(#t~post7 < 20);havoc #t~post7; {1646#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-15 09:16:56,306 INFO L290 TraceCheckUtils]: 22: Hoare triple {1646#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1646#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-15 09:16:56,395 INFO L290 TraceCheckUtils]: 21: Hoare triple {1714#(= (+ (* main_~z~0 main_~x~0) main_~a~0 (* main_~az~0 (* main_~z~0 main_~y~0))) (+ main_~a~0 (* main_~z~0 (+ (* main_~z~0 main_~x~0) main_~a~0))))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {1646#(= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0))} is VALID [2022-04-15 09:16:56,399 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {1639#(not (= |__VERIFIER_assert_#in~cond| 0))} {1603#true} #50#return; {1714#(= (+ (* main_~z~0 main_~x~0) main_~a~0 (* main_~az~0 (* main_~z~0 main_~y~0))) (+ main_~a~0 (* main_~z~0 (+ (* main_~z~0 main_~x~0) main_~a~0))))} is VALID [2022-04-15 09:16:56,399 INFO L290 TraceCheckUtils]: 19: Hoare triple {1639#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {1639#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:16:56,406 INFO L290 TraceCheckUtils]: 18: Hoare triple {1727#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} assume !(0 == ~cond); {1639#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:16:56,407 INFO L290 TraceCheckUtils]: 17: Hoare triple {1603#true} ~cond := #in~cond; {1727#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-15 09:16:56,407 INFO L272 TraceCheckUtils]: 16: Hoare triple {1603#true} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1603#true} is VALID [2022-04-15 09:16:56,407 INFO L290 TraceCheckUtils]: 15: Hoare triple {1603#true} assume !!(#t~post7 < 20);havoc #t~post7; {1603#true} is VALID [2022-04-15 09:16:56,407 INFO L290 TraceCheckUtils]: 14: Hoare triple {1603#true} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1603#true} is VALID [2022-04-15 09:16:56,407 INFO L290 TraceCheckUtils]: 13: Hoare triple {1603#true} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := ~x~0 * ~z~0 + ~a~0;~y~0 := ~y~0 * ~z~0; {1603#true} is VALID [2022-04-15 09:16:56,407 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {1603#true} {1603#true} #50#return; {1603#true} is VALID [2022-04-15 09:16:56,407 INFO L290 TraceCheckUtils]: 11: Hoare triple {1603#true} assume true; {1603#true} is VALID [2022-04-15 09:16:56,407 INFO L290 TraceCheckUtils]: 10: Hoare triple {1603#true} assume !(0 == ~cond); {1603#true} is VALID [2022-04-15 09:16:56,408 INFO L290 TraceCheckUtils]: 9: Hoare triple {1603#true} ~cond := #in~cond; {1603#true} is VALID [2022-04-15 09:16:56,408 INFO L272 TraceCheckUtils]: 8: Hoare triple {1603#true} call __VERIFIER_assert((if 0 == ~z~0 * ~x~0 - ~x~0 + ~a~0 - ~az~0 * ~y~0 then 1 else 0)); {1603#true} is VALID [2022-04-15 09:16:56,408 INFO L290 TraceCheckUtils]: 7: Hoare triple {1603#true} assume !!(#t~post7 < 20);havoc #t~post7; {1603#true} is VALID [2022-04-15 09:16:56,408 INFO L290 TraceCheckUtils]: 6: Hoare triple {1603#true} #t~post7 := ~counter~0;~counter~0 := 1 + #t~post7; {1603#true} is VALID [2022-04-15 09:16:56,408 INFO L290 TraceCheckUtils]: 5: Hoare triple {1603#true} havoc ~z~0;havoc ~a~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;havoc ~az~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~a~0 := #t~nondet5;havoc #t~nondet5;assume -2147483648 <= #t~nondet6 && #t~nondet6 <= 2147483647;~k~0 := #t~nondet6;havoc #t~nondet6;~x~0 := ~a~0;~y~0 := 1;~c~0 := 1;~az~0 := ~a~0 * ~z~0; {1603#true} is VALID [2022-04-15 09:16:56,408 INFO L272 TraceCheckUtils]: 4: Hoare triple {1603#true} call #t~ret8 := main(); {1603#true} is VALID [2022-04-15 09:16:56,408 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1603#true} {1603#true} #54#return; {1603#true} is VALID [2022-04-15 09:16:56,408 INFO L290 TraceCheckUtils]: 2: Hoare triple {1603#true} assume true; {1603#true} is VALID [2022-04-15 09:16:56,408 INFO L290 TraceCheckUtils]: 1: Hoare triple {1603#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {1603#true} is VALID [2022-04-15 09:16:56,408 INFO L272 TraceCheckUtils]: 0: Hoare triple {1603#true} call ULTIMATE.init(); {1603#true} is VALID [2022-04-15 09:16:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-15 09:16:56,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 09:16:56,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799727875] [2022-04-15 09:16:56,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 09:16:56,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097032474] [2022-04-15 09:16:56,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097032474] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-15 09:16:56,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-15 09:16:56,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-04-15 09:16:56,409 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 09:16:56,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1414312687] [2022-04-15 09:16:56,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1414312687] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 09:16:56,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 09:16:56,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-15 09:16:56,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762358837] [2022-04-15 09:16:56,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 09:16:56,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 [2022-04-15 09:16:56,411 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 09:16:56,411 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 9 states, 9 states have (on average 1.8888888888888888) 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) [2022-04-15 09:17:00,580 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 25 edges. 23 inductive. 0 not inductive. 2 times theorem prover too weak to decide inductivity. [2022-04-15 09:17:00,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-15 09:17:00,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 09:17:00,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-15 09:17:00,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-04-15 09:17:00,581 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) 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) [2022-04-15 09:17:03,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-15 09:17:05,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-15 09:17:06,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:17:06,839 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-04-15 09:17:06,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-15 09:17:06,839 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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 [2022-04-15 09:17:06,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 09:17:06,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.8888888888888888) 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) [2022-04-15 09:17:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 26 transitions. [2022-04-15 09:17:06,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.8888888888888888) 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) [2022-04-15 09:17:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 26 transitions. [2022-04-15 09:17:06,841 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 7 states and 26 transitions. [2022-04-15 09:17:13,245 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 26 edges. 23 inductive. 0 not inductive. 3 times theorem prover too weak to decide inductivity. [2022-04-15 09:17:13,245 INFO L225 Difference]: With dead ends: 32 [2022-04-15 09:17:13,245 INFO L226 Difference]: Without dead ends: 0 [2022-04-15 09:17:13,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-15 09:17:13,246 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-04-15 09:17:13,246 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2022-04-15 09:17:13,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-15 09:17:13,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-15 09:17:13,247 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 09:17:13,247 INFO L82 GeneralOperation]: Start isEquivalent. First operand 0 states. Second operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-15 09:17:13,247 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-15 09:17:13,247 INFO L87 Difference]: Start difference. First operand 0 states. Second operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-15 09:17:13,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:17:13,247 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2022-04-15 09:17:13,247 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-15 09:17:13,247 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:17:13,247 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:17:13,247 INFO L74 IsIncluded]: Start isIncluded. First operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand 0 states. [2022-04-15 09:17:13,248 INFO L87 Difference]: Start difference. First operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand 0 states. [2022-04-15 09:17:13,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:17:13,248 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2022-04-15 09:17:13,248 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-15 09:17:13,248 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:17:13,248 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:17:13,248 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 09:17:13,248 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 09:17:13,248 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) [2022-04-15 09:17:13,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-15 09:17:13,248 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2022-04-15 09:17:13,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 09:17:13,248 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-15 09:17:13,248 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) 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) [2022-04-15 09:17:13,248 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 0 states and 0 transitions. [2022-04-15 09:17:13,248 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:17:13,249 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-15 09:17:13,249 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:17:13,250 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-15 09:17:13,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-15 09:17:13,455 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 [2022-04-15 09:17:13,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-15 09:17:52,695 WARN L232 SmtUtils]: Spent 39.19s on a formula simplification. DAG size of input: 100 DAG size of output: 75 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-15 09:18:58,284 WARN L232 SmtUtils]: Spent 1.09m on a formula simplification. DAG size of input: 87 DAG size of output: 71 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-15 09:20:11,767 WARN L232 SmtUtils]: Spent 1.22m on a formula simplification. DAG size of input: 101 DAG size of output: 81 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-15 09:21:01,301 WARN L232 SmtUtils]: Spent 49.52s on a formula simplification. DAG size of input: 74 DAG size of output: 51 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-15 09:22:33,378 WARN L232 SmtUtils]: Spent 1.53m on a formula simplification. DAG size of input: 79 DAG size of output: 53 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-15 09:22:33,405 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-04-15 09:22:33,405 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-04-15 09:22:33,405 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-04-15 09:22:33,406 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2022-04-15 09:22:33,406 INFO L882 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-04-15 09:22:33,406 INFO L882 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-04-15 09:22:33,406 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-04-15 09:22:33,406 INFO L878 garLoopResultBuilder]: At program point L34-1(lines 34 43) the Hoare annotation is: (let ((.cse14 (* main_~a~0 main_~z~0))) (let ((.cse0 (= .cse14 main_~az~0))) (or (and (<= ~counter~0 1) (= main_~y~0 1) (<= |main_#t~post7| 0) (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)) .cse0) (let ((.cse13 (* (- 1) main_~a~0))) (let ((.cse6 (+ .cse13 main_~x~0))) (let ((.cse7 (div .cse6 main_~z~0))) (let ((.cse8 (* .cse7 main_~z~0))) (let ((.cse9 (+ (* (- 1) .cse7) main_~a~0 .cse8))) (let ((.cse12 (div .cse9 main_~az~0)) (.cse3 (div (+ .cse7 .cse13) main_~z~0))) (let ((.cse1 (= main_~z~0 0)) (.cse2 (div main_~y~0 main_~z~0)) (.cse10 (= main_~az~0 0)) (.cse4 (* main_~z~0 .cse3)) (.cse11 (= (* .cse12 main_~z~0) main_~y~0)) (.cse5 (= main_~y~0 0))) (and (or .cse1 (= (+ (* (div .cse2 main_~z~0) main_~az~0) .cse3) (+ main_~a~0 .cse4))) (or (and .cse1 .cse5 (= main_~a~0 main_~x~0)) (and (= 0 (mod .cse6 main_~z~0)) (or (and (= (mod main_~y~0 main_~z~0) 0) (= .cse7 (+ main_~a~0 .cse8))) (and (= (mod .cse9 main_~az~0) 0) (not .cse10) .cse11)) (not .cse1))) (or (and (= (mod .cse2 main_~z~0) 0) .cse10) (and (= .cse12 (* main_~z~0 (div (+ (* (- 1) .cse3) main_~a~0 .cse4) main_~az~0))) .cse11) .cse5))))))))) (not (<= |old(~counter~0)| 0)) (and (<= |main_#t~post7| 1) (= main_~z~0 main_~y~0) (= main_~x~0 (+ .cse14 main_~a~0)) .cse0)))) [2022-04-15 09:22:33,406 INFO L878 garLoopResultBuilder]: At program point L34-3(lines 34 43) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~z~0))) (let ((.cse11 (= .cse0 main_~az~0))) (or (let ((.cse10 (* (- 1) main_~a~0))) (let ((.cse2 (+ .cse10 main_~x~0))) (let ((.cse7 (div .cse2 main_~z~0))) (let ((.cse4 (div (+ .cse7 .cse10) main_~z~0))) (let ((.cse9 (div main_~y~0 main_~z~0)) (.cse5 (* main_~z~0 .cse4)) (.cse1 (= main_~y~0 0))) (and (or (and (= .cse0 0) .cse1 (= main_~a~0 main_~x~0)) (and (= 0 (mod .cse2 main_~z~0)) (not (= main_~z~0 0)) (let ((.cse8 (* .cse7 main_~z~0))) (or (let ((.cse6 (+ (* (- 1) .cse7) main_~a~0 .cse8))) (let ((.cse3 (div .cse6 main_~az~0))) (and (= .cse3 (* main_~z~0 (div (+ (* (- 1) .cse4) main_~a~0 .cse5) main_~az~0))) (= (mod .cse6 main_~az~0) 0) (not (= main_~az~0 0)) (= (* .cse3 main_~z~0) main_~y~0)))) (and (= (mod main_~y~0 main_~z~0) 0) (= (mod .cse9 main_~z~0) 0) (= .cse7 (+ main_~a~0 .cse8))))))) (or (= (+ (* (div .cse9 main_~z~0) main_~az~0) .cse4) (+ main_~a~0 .cse5)) .cse1))))))) (not (<= |old(~counter~0)| 0)) (and (= main_~y~0 1) (<= ~counter~0 0) (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)) .cse11) (and (= main_~z~0 main_~y~0) (<= ~counter~0 1) (= main_~x~0 (+ .cse0 main_~a~0)) .cse11)))) [2022-04-15 09:22:33,406 INFO L878 garLoopResultBuilder]: At program point L34-4(lines 34 43) the Hoare annotation is: (let ((.cse1 (* main_~a~0 main_~z~0)) (.cse0 (= main_~a~0 main_~x~0))) (or (and (= main_~y~0 1) .cse0 (= .cse1 main_~az~0)) (and (= .cse1 0) (= main_~y~0 0) .cse0) (not (<= |old(~counter~0)| 0)) (let ((.cse4 (+ (* (- 1) main_~a~0) main_~x~0))) (and (let ((.cse2 (div .cse4 main_~z~0))) (let ((.cse3 (* .cse2 main_~z~0))) (or (and (= (mod main_~y~0 main_~z~0) 0) (= .cse2 (+ main_~a~0 .cse3))) (and (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) .cse2) main_~a~0 .cse3) main_~az~0) main_~z~0) main_~y~0))))) (= 0 (mod .cse4 main_~z~0)) (not (= main_~z~0 0)) (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)))))) [2022-04-15 09:22:33,406 INFO L878 garLoopResultBuilder]: At program point mainENTRY(lines 22 46) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (<= ~counter~0 0)) [2022-04-15 09:22:33,406 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 46) the Hoare annotation is: true [2022-04-15 09:22:33,406 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 46) the Hoare annotation is: true [2022-04-15 09:22:33,406 INFO L885 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: true [2022-04-15 09:22:33,407 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (* main_~a~0 main_~z~0))) (let ((.cse1 (= .cse0 main_~az~0))) (or (not (<= |old(~counter~0)| 0)) (and (= main_~z~0 main_~y~0) (= main_~x~0 (+ .cse0 main_~a~0)) .cse1) (let ((.cse11 (* (- 1) main_~a~0))) (let ((.cse4 (+ .cse11 main_~x~0))) (let ((.cse5 (div .cse4 main_~z~0)) (.cse3 (= main_~y~0 0))) (and (let ((.cse2 (= main_~z~0 0))) (or (and .cse2 .cse3 (= main_~a~0 main_~x~0)) (and (= 0 (mod .cse4 main_~z~0)) (let ((.cse6 (* .cse5 main_~z~0))) (or (and (= (mod main_~y~0 main_~z~0) 0) (= .cse5 (+ main_~a~0 .cse6))) (let ((.cse7 (+ (* (- 1) .cse5) main_~a~0 .cse6))) (and (= (mod .cse7 main_~az~0) 0) (not (= main_~az~0 0)) (= (* (div .cse7 main_~az~0) main_~z~0) main_~y~0))))) (not .cse2)))) (or (let ((.cse8 (div main_~y~0 main_~z~0)) (.cse9 (+ .cse5 .cse11))) (and (= (mod .cse8 main_~z~0) 0) (= (mod .cse9 main_~z~0) 0) (let ((.cse10 (div .cse9 main_~z~0))) (= (+ (* (div .cse8 main_~z~0) main_~az~0) .cse10) (+ main_~a~0 (* main_~z~0 .cse10)))))) .cse3))))) (and (<= ~counter~0 1) (= main_~y~0 1) (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)) .cse1)))) [2022-04-15 09:22:33,407 INFO L878 garLoopResultBuilder]: At program point L35-1(lines 34 43) the Hoare annotation is: (let ((.cse0 (= main_~z~0 0)) (.cse4 (= (+ (* main_~y~0 main_~az~0) main_~x~0) (+ (* main_~z~0 main_~x~0) main_~a~0)))) (or (not (<= |old(~counter~0)| 0)) (and .cse0 (= main_~y~0 0) (= main_~a~0 main_~x~0)) (let ((.cse1 (div (+ (* (- 1) main_~a~0) main_~x~0) main_~z~0))) (let ((.cse3 (* .cse1 main_~z~0))) (let ((.cse2 (+ main_~a~0 .cse3))) (and (or (and (= (mod main_~y~0 main_~z~0) 0) (= .cse1 .cse2)) (and (not (= main_~az~0 0)) (= (* (div (+ (* (- 1) .cse1) main_~a~0 .cse3) main_~az~0) main_~z~0) main_~y~0))) (not .cse0) (= .cse2 (+ .cse1 (* main_~az~0 (div main_~y~0 main_~z~0)))) .cse4)))) (and (<= ~counter~0 1) (= main_~y~0 1) .cse4 (= (* main_~a~0 main_~z~0) main_~az~0)))) [2022-04-15 09:22:33,407 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-04-15 09:22:33,407 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2022-04-15 09:22:33,407 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-04-15 09:22:33,407 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-15 09:22:33,407 INFO L878 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-04-15 09:22:33,407 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-15 09:22:33,407 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-15 09:22:33,407 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-15 09:22:33,407 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|))) [2022-04-15 09:22:33,407 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-15 09:22:33,407 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-15 09:22:33,407 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-15 09:22:33,408 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-15 09:22:33,409 INFO L719 BasicCegarLoop]: Path program histogram: [4, 4, 2, 2, 2] [2022-04-15 09:22:33,410 INFO L177 ceAbstractionStarter]: Computing trace abstraction results [2022-04-15 09:22:33,422 WARN L170 areAnnotationChecker]: reach_errorENTRY has no Hoare annotation [2022-04-15 09:22:33,423 WARN L170 areAnnotationChecker]: assume_abort_if_notENTRY has no Hoare annotation [2022-04-15 09:22:33,424 WARN L170 areAnnotationChecker]: reach_errorFINAL has no Hoare annotation [2022-04-15 09:22:33,425 WARN L170 areAnnotationChecker]: L12 has no Hoare annotation [2022-04-15 09:22:33,425 WARN L170 areAnnotationChecker]: L12 has no Hoare annotation [2022-04-15 09:22:33,531 WARN L170 areAnnotationChecker]: L12-2 has no Hoare annotation [2022-04-15 09:22:37,803 INFO L163 areAnnotationChecker]: CFG has 26 edges. 25 inductive. 0 not inductive. 1 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2022-04-15 09:22:37,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 09:22:37 BoogieIcfgContainer [2022-04-15 09:22:37,818 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-15 09:22:37,819 INFO L158 Benchmark]: Toolchain (without parser) took 671487.17ms. Allocated memory was 176.2MB in the beginning and 234.9MB in the end (delta: 58.7MB). Free memory was 117.7MB in the beginning and 145.1MB in the end (delta: -27.5MB). Peak memory consumption was 107.7MB. Max. memory is 8.0GB. [2022-04-15 09:22:37,819 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 176.2MB. Free memory is still 133.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-15 09:22:37,819 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.02ms. Allocated memory was 176.2MB in the beginning and 234.9MB in the end (delta: 58.7MB). Free memory was 117.5MB in the beginning and 206.0MB in the end (delta: -88.5MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. [2022-04-15 09:22:37,819 INFO L158 Benchmark]: Boogie Preprocessor took 17.76ms. Allocated memory is still 234.9MB. Free memory was 206.0MB in the beginning and 204.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-15 09:22:37,819 INFO L158 Benchmark]: RCFGBuilder took 246.96ms. Allocated memory is still 234.9MB. Free memory was 204.4MB in the beginning and 192.4MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-15 09:22:37,820 INFO L158 Benchmark]: TraceAbstraction took 671008.98ms. Allocated memory is still 234.9MB. Free memory was 191.8MB in the beginning and 145.1MB in the end (delta: 46.7MB). Peak memory consumption was 123.2MB. Max. memory is 8.0GB. [2022-04-15 09:22:37,820 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 176.2MB. Free memory is still 133.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 210.02ms. Allocated memory was 176.2MB in the beginning and 234.9MB in the end (delta: 58.7MB). Free memory was 117.5MB in the beginning and 206.0MB in the end (delta: -88.5MB). Peak memory consumption was 10.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.76ms. Allocated memory is still 234.9MB. Free memory was 206.0MB in the beginning and 204.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 246.96ms. Allocated memory is still 234.9MB. Free memory was 204.4MB in the beginning and 192.4MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 671008.98ms. Allocated memory is still 234.9MB. Free memory was 191.8MB in the beginning and 145.1MB in the end (delta: 46.7MB). Peak memory consumption was 123.2MB. 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: 666.5s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 33.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 319.9s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 48 SdHoareTripleChecker+Valid, 12.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 45 mSDsluCounter, 404 SdHoareTripleChecker+Invalid, 12.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 21 IncrementalHoareTripleChecker+Unchecked, 283 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 183 IncrementalHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 121 mSDtfsCounter, 183 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 229 GetRequests, 178 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 78.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=5, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 82 PreInvPairs, 133 NumberOfFragments, 1087 HoareAnnotationTreeSize, 82 FomulaSimplifications, 26 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 22 FomulaSimplificationsInter, 1698 FormulaSimplificationTreeSizeReductionInter, 319.9s 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: ((((((a * z == 0 && y == 0) && a == x) || ((0 == (-1 * a + x) % z && !(z == 0)) && (((((-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 == 0) && !(az == 0)) && (-1 * ((-1 * a + x) / z) + a + (-1 * a + x) / z * z) / az * z == y) || ((y % z == 0 && y / z % z == 0) && (-1 * a + x) / z == a + (-1 * a + x) / z * z)))) && (y / z / z * az + ((-1 * a + x) / z + -1 * a) / z == a + z * (((-1 * a + x) / z + -1 * a) / z) || y == 0)) || !(\old(counter) <= 0)) || (((y == 1 && counter <= 0) && y * az + x == z * x + a) && a * z == az)) || (((z == y && counter <= 1) && x == a * z + 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) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-04-15 09:22:37,916 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...