/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/fermat2-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-e106359-m [2022-04-15 09:02:32,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-15 09:02:32,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-15 09:02:32,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-15 09:02:32,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-15 09:02:32,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-15 09:02:32,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-15 09:02:32,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-15 09:02:32,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-15 09:02:32,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-15 09:02:32,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-15 09:02:32,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-15 09:02:32,733 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-15 09:02:32,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-15 09:02:32,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-15 09:02:32,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-15 09:02:32,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-15 09:02:32,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-15 09:02:32,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-15 09:02:32,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-15 09:02:32,742 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-15 09:02:32,742 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 09:02:32,747 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-15 09:02:32,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-15 09:02:32,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-15 09:02:32,748 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-15 09:02:32,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-15 09:02:32,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-15 09:02:32,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-15 09:02:32,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-15 09:02:32,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-15 09:02:32,749 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-15 09:02:32,749 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-15 09:02:32,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-15 09:02:32,749 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-15 09:02:32,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-15 09:02:32,750 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-15 09:02:32,750 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-15 09:02:32,750 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-15 09:02:32,750 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-15 09:02:32,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 09:02:32,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-15 09:02:32,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-15 09:02:32,750 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-15 09:02:32,751 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-15 09:02:32,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-15 09:02:32,751 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-15 09:02:32,751 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-15 09:02:32,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-15 09:02:32,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-15 09:02:32,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-15 09:02:32,912 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-15 09:02:32,915 INFO L275 PluginConnector]: CDTParser initialized [2022-04-15 09:02:32,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound1.c [2022-04-15 09:02:32,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/610d4a34c/31da9236a9954c5fa60ba89235b25330/FLAG8c77d71f9 [2022-04-15 09:02:33,305 INFO L306 CDTParser]: Found 1 translation units. [2022-04-15 09:02:33,305 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound1.c [2022-04-15 09:02:33,314 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/610d4a34c/31da9236a9954c5fa60ba89235b25330/FLAG8c77d71f9 [2022-04-15 09:02:33,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/610d4a34c/31da9236a9954c5fa60ba89235b25330 [2022-04-15 09:02:33,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-15 09:02:33,323 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-15 09:02:33,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-15 09:02:33,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-15 09:02:33,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-15 09:02:33,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 09:02:33" (1/1) ... [2022-04-15 09:02:33,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e612286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:02:33, skipping insertion in model container [2022-04-15 09:02:33,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 09:02:33" (1/1) ... [2022-04-15 09:02:33,332 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-15 09:02:33,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-15 09:02:33,444 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/fermat2-ll_unwindbound1.c[524,537] [2022-04-15 09:02:33,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 09:02:33,479 INFO L203 MainTranslator]: Completed pre-run [2022-04-15 09:02:33,490 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/fermat2-ll_unwindbound1.c[524,537] [2022-04-15 09:02:33,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 09:02:33,505 INFO L208 MainTranslator]: Completed translation [2022-04-15 09:02:33,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:02:33 WrapperNode [2022-04-15 09:02:33,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-15 09:02:33,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-15 09:02:33,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-15 09:02:33,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-15 09:02:33,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:02:33" (1/1) ... [2022-04-15 09:02:33,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:02:33" (1/1) ... [2022-04-15 09:02:33,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:02:33" (1/1) ... [2022-04-15 09:02:33,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:02:33" (1/1) ... [2022-04-15 09:02:33,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:02:33" (1/1) ... [2022-04-15 09:02:33,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:02:33" (1/1) ... [2022-04-15 09:02:33,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:02:33" (1/1) ... [2022-04-15 09:02:33,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-15 09:02:33,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-15 09:02:33,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-15 09:02:33,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-15 09:02:33,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:02:33" (1/1) ... [2022-04-15 09:02:33,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 09:02:33,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 09:02:33,555 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 09:02:33,557 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 09:02:33,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-15 09:02:33,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-15 09:02:33,580 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-15 09:02:33,580 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-15 09:02:33,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-15 09:02:33,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-15 09:02:33,580 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-15 09:02:33,580 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-15 09:02:33,580 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-15 09:02:33,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-15 09:02:33,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-15 09:02:33,580 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-15 09:02:33,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-15 09:02:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-15 09:02:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-15 09:02:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-15 09:02:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-15 09:02:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-15 09:02:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-15 09:02:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-15 09:02:33,622 INFO L234 CfgBuilder]: Building ICFG [2022-04-15 09:02:33,623 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-15 09:02:33,788 INFO L275 CfgBuilder]: Performing block encoding [2022-04-15 09:02:33,792 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-15 09:02:33,792 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-15 09:02:33,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 09:02:33 BoogieIcfgContainer [2022-04-15 09:02:33,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-15 09:02:33,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-15 09:02:33,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-15 09:02:33,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-15 09:02:33,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 09:02:33" (1/3) ... [2022-04-15 09:02:33,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40321cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 09:02:33, skipping insertion in model container [2022-04-15 09:02:33,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 09:02:33" (2/3) ... [2022-04-15 09:02:33,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40321cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 09:02:33, skipping insertion in model container [2022-04-15 09:02:33,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 09:02:33" (3/3) ... [2022-04-15 09:02:33,801 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound1.c [2022-04-15 09:02:33,804 INFO L202 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-15 09:02:33,804 INFO L161 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-15 09:02:33,830 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-15 09:02:33,834 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 09:02:33,834 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-15 09:02:33,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-15 09:02:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-15 09:02:33,850 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 09:02:33,850 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 09:02:33,850 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 09:02:33,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 09:02:33,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2022-04-15 09:02:33,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 09:02:33,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [93388861] [2022-04-15 09:02:33,864 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 09:02:33,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 2 times [2022-04-15 09:02:33,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 09:02:33,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619929263] [2022-04-15 09:02:33,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 09:02:33,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 09:02:33,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 09:02:33,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586781443] [2022-04-15 09:02:33,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 09:02:33,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 09:02:33,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 09:02:33,929 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 09:02:33,930 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 09:02:33,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 09:02:33,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 09:02:33,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 1 conjunts are in the unsatisfiable core [2022-04-15 09:02:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 09:02:33,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 09:02:34,072 INFO L272 TraceCheckUtils]: 0: Hoare triple {33#true} call ULTIMATE.init(); {33#true} is VALID [2022-04-15 09:02:34,073 INFO L290 TraceCheckUtils]: 1: Hoare triple {33#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(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {33#true} is VALID [2022-04-15 09:02:34,073 INFO L290 TraceCheckUtils]: 2: Hoare triple {33#true} assume true; {33#true} is VALID [2022-04-15 09:02:34,074 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {33#true} {33#true} #67#return; {33#true} is VALID [2022-04-15 09:02:34,074 INFO L272 TraceCheckUtils]: 4: Hoare triple {33#true} call #t~ret7 := main(); {33#true} is VALID [2022-04-15 09:02:34,074 INFO L290 TraceCheckUtils]: 5: Hoare triple {33#true} havoc ~A~0;havoc ~R~0;havoc ~u~0;havoc ~v~0;havoc ~r~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~A~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~R~0 := #t~nondet5;havoc #t~nondet5; {33#true} is VALID [2022-04-15 09:02:34,074 INFO L272 TraceCheckUtils]: 6: Hoare triple {33#true} call assume_abort_if_not((if (~R~0 - 1) * (~R~0 - 1) < ~A~0 then 1 else 0)); {33#true} is VALID [2022-04-15 09:02:34,075 INFO L290 TraceCheckUtils]: 7: Hoare triple {33#true} ~cond := #in~cond; {33#true} is VALID [2022-04-15 09:02:34,075 INFO L290 TraceCheckUtils]: 8: Hoare triple {33#true} assume 0 == ~cond;assume false; {33#true} is VALID [2022-04-15 09:02:34,075 INFO L290 TraceCheckUtils]: 9: Hoare triple {33#true} assume true; {33#true} is VALID [2022-04-15 09:02:34,076 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {33#true} {33#true} #59#return; {33#true} is VALID [2022-04-15 09:02:34,076 INFO L272 TraceCheckUtils]: 11: Hoare triple {33#true} call assume_abort_if_not((if 1 == (if ~A~0 < 0 && 0 != ~A~0 % 2 then ~A~0 % 2 - 2 else ~A~0 % 2) then 1 else 0)); {33#true} is VALID [2022-04-15 09:02:34,076 INFO L290 TraceCheckUtils]: 12: Hoare triple {33#true} ~cond := #in~cond; {33#true} is VALID [2022-04-15 09:02:34,077 INFO L290 TraceCheckUtils]: 13: Hoare triple {33#true} assume 0 == ~cond;assume false; {34#false} is VALID [2022-04-15 09:02:34,077 INFO L290 TraceCheckUtils]: 14: Hoare triple {34#false} assume true; {34#false} is VALID [2022-04-15 09:02:34,077 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {34#false} {33#true} #61#return; {34#false} is VALID [2022-04-15 09:02:34,077 INFO L290 TraceCheckUtils]: 16: Hoare triple {34#false} ~u~0 := 1 + 2 * ~R~0;~v~0 := 1;~r~0 := ~R~0 * ~R~0 - ~A~0; {34#false} is VALID [2022-04-15 09:02:34,078 INFO L290 TraceCheckUtils]: 17: Hoare triple {34#false} assume !true; {34#false} is VALID [2022-04-15 09:02:34,079 INFO L272 TraceCheckUtils]: 18: Hoare triple {34#false} call __VERIFIER_assert((if 4 * ~A~0 == ~u~0 * ~u~0 - ~v~0 * ~v~0 - 2 * ~u~0 + 2 * ~v~0 then 1 else 0)); {34#false} is VALID [2022-04-15 09:02:34,079 INFO L290 TraceCheckUtils]: 19: Hoare triple {34#false} ~cond := #in~cond; {34#false} is VALID [2022-04-15 09:02:34,079 INFO L290 TraceCheckUtils]: 20: Hoare triple {34#false} assume 0 == ~cond; {34#false} is VALID [2022-04-15 09:02:34,079 INFO L290 TraceCheckUtils]: 21: Hoare triple {34#false} assume !false; {34#false} is VALID [2022-04-15 09:02:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-15 09:02:34,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 09:02:34,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 09:02:34,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619929263] [2022-04-15 09:02:34,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 09:02:34,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586781443] [2022-04-15 09:02:34,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586781443] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 09:02:34,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 09:02:34,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-15 09:02:34,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 09:02:34,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [93388861] [2022-04-15 09:02:34,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [93388861] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 09:02:34,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 09:02:34,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-04-15 09:02:34,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804606452] [2022-04-15 09:02:34,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 09:02:34,091 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-04-15 09:02:34,092 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 09:02:34,094 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-15 09:02:34,120 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 09:02:34,120 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-04-15 09:02:34,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 09:02:34,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-04-15 09:02:34,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-04-15 09:02:34,148 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-15 09:02:34,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:02:34,205 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-04-15 09:02:34,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-04-15 09:02:34,206 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-04-15 09:02:34,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 09:02:34,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-15 09:02:34,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 70 transitions. [2022-04-15 09:02:34,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-15 09:02:34,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 70 transitions. [2022-04-15 09:02:34,226 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 2 states and 70 transitions. [2022-04-15 09:02:34,290 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 70 edges. 70 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:02:34,296 INFO L225 Difference]: With dead ends: 53 [2022-04-15 09:02:34,297 INFO L226 Difference]: Without dead ends: 25 [2022-04-15 09:02:34,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 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 09:02:34,302 INFO L913 BasicCegarLoop]: 34 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, 34 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 09:02:34,303 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 09:02:34,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-15 09:02:34,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-15 09:02:34,326 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 09:02:34,327 INFO L82 GeneralOperation]: Start isEquivalent. First operand 25 states. Second operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 09:02:34,327 INFO L74 IsIncluded]: Start isIncluded. First operand 25 states. Second operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 09:02:34,328 INFO L87 Difference]: Start difference. First operand 25 states. Second operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 09:02:34,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:02:34,333 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-04-15 09:02:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-04-15 09:02:34,337 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:02:34,337 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:02:34,346 INFO L74 IsIncluded]: Start isIncluded. First operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 25 states. [2022-04-15 09:02:34,347 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 25 states. [2022-04-15 09:02:34,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:02:34,349 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-04-15 09:02:34,350 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-04-15 09:02:34,350 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:02:34,350 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:02:34,350 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 09:02:34,350 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 09:02:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 09:02:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-04-15 09:02:34,355 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-04-15 09:02:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 09:02:34,355 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-04-15 09:02:34,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-15 09:02:34,356 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 25 states and 29 transitions. [2022-04-15 09:02:34,380 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 09:02:34,380 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-04-15 09:02:34,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-15 09:02:34,381 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 09:02:34,381 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 09:02:34,403 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 09:02:34,597 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 09:02:34,597 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 09:02:34,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 09:02:34,599 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2022-04-15 09:02:34,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 09:02:34,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2116751875] [2022-04-15 09:02:34,600 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 09:02:34,600 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 2 times [2022-04-15 09:02:34,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 09:02:34,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095851373] [2022-04-15 09:02:34,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 09:02:34,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 09:02:34,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 09:02:34,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [917191098] [2022-04-15 09:02:34,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 09:02:34,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 09:02:34,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 09:02:34,624 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 09:02:34,625 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 09:02:34,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 09:02:34,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 09:02:34,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-15 09:02:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 09:02:34,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 09:02:34,831 INFO L272 TraceCheckUtils]: 0: Hoare triple {306#true} call ULTIMATE.init(); {306#true} is VALID [2022-04-15 09:02:34,832 INFO L290 TraceCheckUtils]: 1: Hoare triple {306#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(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {314#(<= ~counter~0 0)} is VALID [2022-04-15 09:02:34,832 INFO L290 TraceCheckUtils]: 2: Hoare triple {314#(<= ~counter~0 0)} assume true; {314#(<= ~counter~0 0)} is VALID [2022-04-15 09:02:34,833 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {314#(<= ~counter~0 0)} {306#true} #67#return; {314#(<= ~counter~0 0)} is VALID [2022-04-15 09:02:34,833 INFO L272 TraceCheckUtils]: 4: Hoare triple {314#(<= ~counter~0 0)} call #t~ret7 := main(); {314#(<= ~counter~0 0)} is VALID [2022-04-15 09:02:34,833 INFO L290 TraceCheckUtils]: 5: Hoare triple {314#(<= ~counter~0 0)} havoc ~A~0;havoc ~R~0;havoc ~u~0;havoc ~v~0;havoc ~r~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~A~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~R~0 := #t~nondet5;havoc #t~nondet5; {314#(<= ~counter~0 0)} is VALID [2022-04-15 09:02:34,834 INFO L272 TraceCheckUtils]: 6: Hoare triple {314#(<= ~counter~0 0)} call assume_abort_if_not((if (~R~0 - 1) * (~R~0 - 1) < ~A~0 then 1 else 0)); {314#(<= ~counter~0 0)} is VALID [2022-04-15 09:02:34,835 INFO L290 TraceCheckUtils]: 7: Hoare triple {314#(<= ~counter~0 0)} ~cond := #in~cond; {314#(<= ~counter~0 0)} is VALID [2022-04-15 09:02:34,835 INFO L290 TraceCheckUtils]: 8: Hoare triple {314#(<= ~counter~0 0)} assume !(0 == ~cond); {314#(<= ~counter~0 0)} is VALID [2022-04-15 09:02:34,835 INFO L290 TraceCheckUtils]: 9: Hoare triple {314#(<= ~counter~0 0)} assume true; {314#(<= ~counter~0 0)} is VALID [2022-04-15 09:02:34,836 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {314#(<= ~counter~0 0)} {314#(<= ~counter~0 0)} #59#return; {314#(<= ~counter~0 0)} is VALID [2022-04-15 09:02:34,836 INFO L272 TraceCheckUtils]: 11: Hoare triple {314#(<= ~counter~0 0)} call assume_abort_if_not((if 1 == (if ~A~0 < 0 && 0 != ~A~0 % 2 then ~A~0 % 2 - 2 else ~A~0 % 2) then 1 else 0)); {314#(<= ~counter~0 0)} is VALID [2022-04-15 09:02:34,837 INFO L290 TraceCheckUtils]: 12: Hoare triple {314#(<= ~counter~0 0)} ~cond := #in~cond; {314#(<= ~counter~0 0)} is VALID [2022-04-15 09:02:34,837 INFO L290 TraceCheckUtils]: 13: Hoare triple {314#(<= ~counter~0 0)} assume !(0 == ~cond); {314#(<= ~counter~0 0)} is VALID [2022-04-15 09:02:34,838 INFO L290 TraceCheckUtils]: 14: Hoare triple {314#(<= ~counter~0 0)} assume true; {314#(<= ~counter~0 0)} is VALID [2022-04-15 09:02:34,839 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {314#(<= ~counter~0 0)} {314#(<= ~counter~0 0)} #61#return; {314#(<= ~counter~0 0)} is VALID [2022-04-15 09:02:34,840 INFO L290 TraceCheckUtils]: 16: Hoare triple {314#(<= ~counter~0 0)} ~u~0 := 1 + 2 * ~R~0;~v~0 := 1;~r~0 := ~R~0 * ~R~0 - ~A~0; {314#(<= ~counter~0 0)} is VALID [2022-04-15 09:02:34,840 INFO L290 TraceCheckUtils]: 17: Hoare triple {314#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {363#(<= |main_#t~post6| 0)} is VALID [2022-04-15 09:02:34,841 INFO L290 TraceCheckUtils]: 18: Hoare triple {363#(<= |main_#t~post6| 0)} assume !(#t~post6 < 1);havoc #t~post6; {307#false} is VALID [2022-04-15 09:02:34,841 INFO L272 TraceCheckUtils]: 19: Hoare triple {307#false} call __VERIFIER_assert((if 4 * ~A~0 == ~u~0 * ~u~0 - ~v~0 * ~v~0 - 2 * ~u~0 + 2 * ~v~0 then 1 else 0)); {307#false} is VALID [2022-04-15 09:02:34,841 INFO L290 TraceCheckUtils]: 20: Hoare triple {307#false} ~cond := #in~cond; {307#false} is VALID [2022-04-15 09:02:34,842 INFO L290 TraceCheckUtils]: 21: Hoare triple {307#false} assume 0 == ~cond; {307#false} is VALID [2022-04-15 09:02:34,842 INFO L290 TraceCheckUtils]: 22: Hoare triple {307#false} assume !false; {307#false} is VALID [2022-04-15 09:02:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-15 09:02:34,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 09:02:34,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 09:02:34,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095851373] [2022-04-15 09:02:34,843 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 09:02:34,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917191098] [2022-04-15 09:02:34,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917191098] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 09:02:34,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 09:02:34,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-15 09:02:34,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 09:02:34,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2116751875] [2022-04-15 09:02:34,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2116751875] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 09:02:34,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 09:02:34,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-15 09:02:34,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911384628] [2022-04-15 09:02:34,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 09:02:34,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-15 09:02:34,848 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 09:02:34,848 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-15 09:02:34,863 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 09:02:34,863 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-15 09:02:34,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 09:02:34,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-15 09:02:34,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-15 09:02:34,864 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-15 09:02:34,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:02:34,922 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-04-15 09:02:34,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-15 09:02:34,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-04-15 09:02:34,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 09:02:34,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-15 09:02:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 38 transitions. [2022-04-15 09:02:34,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-15 09:02:34,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 38 transitions. [2022-04-15 09:02:34,930 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 38 transitions. [2022-04-15 09:02:34,955 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 38 edges. 38 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:02:34,956 INFO L225 Difference]: With dead ends: 34 [2022-04-15 09:02:34,956 INFO L226 Difference]: Without dead ends: 27 [2022-04-15 09:02:34,957 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 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 09:02:34,962 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 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 09:02:34,962 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 09:02:34,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-15 09:02:34,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-15 09:02:34,979 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 09:02:34,979 INFO L82 GeneralOperation]: Start isEquivalent. First operand 27 states. Second operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 09:02:34,980 INFO L74 IsIncluded]: Start isIncluded. First operand 27 states. Second operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 09:02:34,980 INFO L87 Difference]: Start difference. First operand 27 states. Second operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 09:02:34,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:02:34,983 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-04-15 09:02:34,983 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-15 09:02:34,984 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:02:34,984 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:02:34,984 INFO L74 IsIncluded]: Start isIncluded. First operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 27 states. [2022-04-15 09:02:34,985 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 27 states. [2022-04-15 09:02:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:02:34,989 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-04-15 09:02:34,990 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-15 09:02:34,991 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:02:34,991 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:02:34,991 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 09:02:34,991 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 09:02:34,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 09:02:34,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-04-15 09:02:34,994 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2022-04-15 09:02:34,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 09:02:34,994 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-04-15 09:02:34,994 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-15 09:02:34,994 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 27 states and 31 transitions. [2022-04-15 09:02:35,021 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 09:02:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-15 09:02:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-15 09:02:35,023 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 09:02:35,023 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 09:02:35,039 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 09:02:35,223 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 09:02:35,223 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 09:02:35,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 09:02:35,224 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2022-04-15 09:02:35,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 09:02:35,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1911214630] [2022-04-15 09:02:35,224 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 09:02:35,224 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 2 times [2022-04-15 09:02:35,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 09:02:35,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801735682] [2022-04-15 09:02:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 09:02:35,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 09:02:35,234 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 09:02:35,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034738602] [2022-04-15 09:02:35,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 09:02:35,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 09:02:35,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 09:02:35,235 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 09:02:35,236 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 09:02:35,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 09:02:35,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 09:02:35,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-15 09:02:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 09:02:35,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 09:02:35,613 INFO L272 TraceCheckUtils]: 0: Hoare triple {554#true} call ULTIMATE.init(); {554#true} is VALID [2022-04-15 09:02:35,613 INFO L290 TraceCheckUtils]: 1: Hoare triple {554#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(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {554#true} is VALID [2022-04-15 09:02:35,613 INFO L290 TraceCheckUtils]: 2: Hoare triple {554#true} assume true; {554#true} is VALID [2022-04-15 09:02:35,613 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {554#true} {554#true} #67#return; {554#true} is VALID [2022-04-15 09:02:35,615 INFO L272 TraceCheckUtils]: 4: Hoare triple {554#true} call #t~ret7 := main(); {554#true} is VALID [2022-04-15 09:02:35,616 INFO L290 TraceCheckUtils]: 5: Hoare triple {554#true} havoc ~A~0;havoc ~R~0;havoc ~u~0;havoc ~v~0;havoc ~r~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~A~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~R~0 := #t~nondet5;havoc #t~nondet5; {554#true} is VALID [2022-04-15 09:02:35,616 INFO L272 TraceCheckUtils]: 6: Hoare triple {554#true} call assume_abort_if_not((if (~R~0 - 1) * (~R~0 - 1) < ~A~0 then 1 else 0)); {554#true} is VALID [2022-04-15 09:02:35,616 INFO L290 TraceCheckUtils]: 7: Hoare triple {554#true} ~cond := #in~cond; {554#true} is VALID [2022-04-15 09:02:35,616 INFO L290 TraceCheckUtils]: 8: Hoare triple {554#true} assume !(0 == ~cond); {554#true} is VALID [2022-04-15 09:02:35,616 INFO L290 TraceCheckUtils]: 9: Hoare triple {554#true} assume true; {554#true} is VALID [2022-04-15 09:02:35,616 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {554#true} {554#true} #59#return; {554#true} is VALID [2022-04-15 09:02:35,616 INFO L272 TraceCheckUtils]: 11: Hoare triple {554#true} call assume_abort_if_not((if 1 == (if ~A~0 < 0 && 0 != ~A~0 % 2 then ~A~0 % 2 - 2 else ~A~0 % 2) then 1 else 0)); {554#true} is VALID [2022-04-15 09:02:35,616 INFO L290 TraceCheckUtils]: 12: Hoare triple {554#true} ~cond := #in~cond; {554#true} is VALID [2022-04-15 09:02:35,617 INFO L290 TraceCheckUtils]: 13: Hoare triple {554#true} assume !(0 == ~cond); {554#true} is VALID [2022-04-15 09:02:35,617 INFO L290 TraceCheckUtils]: 14: Hoare triple {554#true} assume true; {554#true} is VALID [2022-04-15 09:02:35,617 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {554#true} {554#true} #61#return; {554#true} is VALID [2022-04-15 09:02:36,157 INFO L290 TraceCheckUtils]: 16: Hoare triple {554#true} ~u~0 := 1 + 2 * ~R~0;~v~0 := 1;~r~0 := ~R~0 * ~R~0 - ~A~0; {607#(and (= (+ (* (- 1) main_~A~0) (* (div (+ (* (- 1) main_~u~0) 1) (- 2)) (div (+ (* (- 1) main_~u~0) 1) (- 2)))) main_~r~0) (= (mod (+ main_~u~0 1) 2) 0) (= main_~v~0 1))} is VALID [2022-04-15 09:02:36,158 INFO L290 TraceCheckUtils]: 17: Hoare triple {607#(and (= (+ (* (- 1) main_~A~0) (* (div (+ (* (- 1) main_~u~0) 1) (- 2)) (div (+ (* (- 1) main_~u~0) 1) (- 2)))) main_~r~0) (= (mod (+ main_~u~0 1) 2) 0) (= main_~v~0 1))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {607#(and (= (+ (* (- 1) main_~A~0) (* (div (+ (* (- 1) main_~u~0) 1) (- 2)) (div (+ (* (- 1) main_~u~0) 1) (- 2)))) main_~r~0) (= (mod (+ main_~u~0 1) 2) 0) (= main_~v~0 1))} is VALID [2022-04-15 09:02:36,159 INFO L290 TraceCheckUtils]: 18: Hoare triple {607#(and (= (+ (* (- 1) main_~A~0) (* (div (+ (* (- 1) main_~u~0) 1) (- 2)) (div (+ (* (- 1) main_~u~0) 1) (- 2)))) main_~r~0) (= (mod (+ main_~u~0 1) 2) 0) (= main_~v~0 1))} assume !!(#t~post6 < 1);havoc #t~post6; {607#(and (= (+ (* (- 1) main_~A~0) (* (div (+ (* (- 1) main_~u~0) 1) (- 2)) (div (+ (* (- 1) main_~u~0) 1) (- 2)))) main_~r~0) (= (mod (+ main_~u~0 1) 2) 0) (= main_~v~0 1))} is VALID [2022-04-15 09:02:36,229 INFO L272 TraceCheckUtils]: 19: Hoare triple {607#(and (= (+ (* (- 1) main_~A~0) (* (div (+ (* (- 1) main_~u~0) 1) (- 2)) (div (+ (* (- 1) main_~u~0) 1) (- 2)))) main_~r~0) (= (mod (+ main_~u~0 1) 2) 0) (= main_~v~0 1))} call __VERIFIER_assert((if 4 * (~A~0 + ~r~0) == ~u~0 * ~u~0 - ~v~0 * ~v~0 - 2 * ~u~0 + 2 * ~v~0 then 1 else 0)); {617#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 09:02:36,229 INFO L290 TraceCheckUtils]: 20: Hoare triple {617#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {621#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 09:02:36,230 INFO L290 TraceCheckUtils]: 21: Hoare triple {621#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {555#false} is VALID [2022-04-15 09:02:36,230 INFO L290 TraceCheckUtils]: 22: Hoare triple {555#false} assume !false; {555#false} is VALID [2022-04-15 09:02:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-15 09:02:36,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 09:02:36,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 09:02:36,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801735682] [2022-04-15 09:02:36,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 09:02:36,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034738602] [2022-04-15 09:02:36,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034738602] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 09:02:36,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 09:02:36,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 09:02:36,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 09:02:36,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1911214630] [2022-04-15 09:02:36,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1911214630] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 09:02:36,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 09:02:36,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 09:02:36,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45466322] [2022-04-15 09:02:36,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 09:02:36,232 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-04-15 09:02:36,232 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 09:02:36,232 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-15 09:02:37,269 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 09:02:37,269 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-15 09:02:37,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 09:02:37,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-15 09:02:37,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-15 09:02:37,270 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-15 09:02:42,536 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-15 09:02:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:02:42,588 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-04-15 09:02:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-15 09:02:42,589 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-04-15 09:02:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 09:02:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-15 09:02:42,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2022-04-15 09:02:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-15 09:02:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2022-04-15 09:02:42,591 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 44 transitions. [2022-04-15 09:02:45,161 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 44 edges. 44 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:02:45,163 INFO L225 Difference]: With dead ends: 39 [2022-04-15 09:02:45,163 INFO L226 Difference]: Without dead ends: 37 [2022-04-15 09:02:45,163 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 09:02:45,164 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-15 09:02:45,164 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 85 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-15 09:02:45,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-15 09:02:45,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-04-15 09:02:45,182 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 09:02:45,182 INFO L82 GeneralOperation]: Start isEquivalent. First operand 37 states. Second operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-15 09:02:45,182 INFO L74 IsIncluded]: Start isIncluded. First operand 37 states. Second operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-15 09:02:45,183 INFO L87 Difference]: Start difference. First operand 37 states. Second operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-15 09:02:45,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:02:45,184 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-04-15 09:02:45,184 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-04-15 09:02:45,184 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:02:45,185 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:02:45,185 INFO L74 IsIncluded]: Start isIncluded. First operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand 37 states. [2022-04-15 09:02:45,185 INFO L87 Difference]: Start difference. First operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand 37 states. [2022-04-15 09:02:45,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:02:45,186 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-04-15 09:02:45,186 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-04-15 09:02:45,187 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:02:45,187 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:02:45,187 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 09:02:45,187 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 09:02:45,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-15 09:02:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-04-15 09:02:45,188 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 23 [2022-04-15 09:02:45,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 09:02:45,188 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-04-15 09:02:45,188 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-15 09:02:45,188 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 36 states and 43 transitions. [2022-04-15 09:02:50,356 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 43 edges. 41 inductive. 0 not inductive. 2 times theorem prover too weak to decide inductivity. [2022-04-15 09:02:50,356 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-04-15 09:02:50,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-15 09:02:50,357 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 09:02:50,357 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 09:02:50,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-15 09:02:50,557 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 09:02:50,558 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 09:02:50,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 09:02:50,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2022-04-15 09:02:50,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 09:02:50,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1109735641] [2022-04-15 09:02:50,558 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 09:02:50,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 2 times [2022-04-15 09:02:50,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 09:02:50,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385241284] [2022-04-15 09:02:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 09:02:50,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 09:02:50,570 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 09:02:50,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055007124] [2022-04-15 09:02:50,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 09:02:50,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 09:02:50,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 09:02:50,575 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 09:02:50,576 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 09:02:50,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-15 09:02:50,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 09:02:50,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-15 09:02:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 09:02:50,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 09:02:50,788 INFO L272 TraceCheckUtils]: 0: Hoare triple {853#true} call ULTIMATE.init(); {853#true} is VALID [2022-04-15 09:02:50,788 INFO L290 TraceCheckUtils]: 1: Hoare triple {853#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(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {853#true} is VALID [2022-04-15 09:02:50,788 INFO L290 TraceCheckUtils]: 2: Hoare triple {853#true} assume true; {853#true} is VALID [2022-04-15 09:02:50,788 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {853#true} {853#true} #67#return; {853#true} is VALID [2022-04-15 09:02:50,789 INFO L272 TraceCheckUtils]: 4: Hoare triple {853#true} call #t~ret7 := main(); {853#true} is VALID [2022-04-15 09:02:50,789 INFO L290 TraceCheckUtils]: 5: Hoare triple {853#true} havoc ~A~0;havoc ~R~0;havoc ~u~0;havoc ~v~0;havoc ~r~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~A~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~R~0 := #t~nondet5;havoc #t~nondet5; {853#true} is VALID [2022-04-15 09:02:50,789 INFO L272 TraceCheckUtils]: 6: Hoare triple {853#true} call assume_abort_if_not((if (~R~0 - 1) * (~R~0 - 1) < ~A~0 then 1 else 0)); {853#true} is VALID [2022-04-15 09:02:50,789 INFO L290 TraceCheckUtils]: 7: Hoare triple {853#true} ~cond := #in~cond; {853#true} is VALID [2022-04-15 09:02:50,789 INFO L290 TraceCheckUtils]: 8: Hoare triple {853#true} assume !(0 == ~cond); {853#true} is VALID [2022-04-15 09:02:50,790 INFO L290 TraceCheckUtils]: 9: Hoare triple {853#true} assume true; {853#true} is VALID [2022-04-15 09:02:50,790 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {853#true} {853#true} #59#return; {853#true} is VALID [2022-04-15 09:02:50,790 INFO L272 TraceCheckUtils]: 11: Hoare triple {853#true} call assume_abort_if_not((if 1 == (if ~A~0 < 0 && 0 != ~A~0 % 2 then ~A~0 % 2 - 2 else ~A~0 % 2) then 1 else 0)); {853#true} is VALID [2022-04-15 09:02:50,790 INFO L290 TraceCheckUtils]: 12: Hoare triple {853#true} ~cond := #in~cond; {853#true} is VALID [2022-04-15 09:02:50,791 INFO L290 TraceCheckUtils]: 13: Hoare triple {853#true} assume !(0 == ~cond); {853#true} is VALID [2022-04-15 09:02:50,791 INFO L290 TraceCheckUtils]: 14: Hoare triple {853#true} assume true; {853#true} is VALID [2022-04-15 09:02:50,791 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {853#true} {853#true} #61#return; {853#true} is VALID [2022-04-15 09:02:50,791 INFO L290 TraceCheckUtils]: 16: Hoare triple {853#true} ~u~0 := 1 + 2 * ~R~0;~v~0 := 1;~r~0 := ~R~0 * ~R~0 - ~A~0; {853#true} is VALID [2022-04-15 09:02:50,791 INFO L290 TraceCheckUtils]: 17: Hoare triple {853#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {853#true} is VALID [2022-04-15 09:02:50,791 INFO L290 TraceCheckUtils]: 18: Hoare triple {853#true} assume !!(#t~post6 < 1);havoc #t~post6; {853#true} is VALID [2022-04-15 09:02:50,793 INFO L272 TraceCheckUtils]: 19: Hoare triple {853#true} call __VERIFIER_assert((if 4 * (~A~0 + ~r~0) == ~u~0 * ~u~0 - ~v~0 * ~v~0 - 2 * ~u~0 + 2 * ~v~0 then 1 else 0)); {853#true} is VALID [2022-04-15 09:02:50,793 INFO L290 TraceCheckUtils]: 20: Hoare triple {853#true} ~cond := #in~cond; {918#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-15 09:02:50,794 INFO L290 TraceCheckUtils]: 21: Hoare triple {918#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {922#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:02:50,794 INFO L290 TraceCheckUtils]: 22: Hoare triple {922#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {922#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:02:50,795 INFO L284 TraceCheckUtils]: 23: Hoare quadruple {922#(not (= |__VERIFIER_assert_#in~cond| 0))} {853#true} #63#return; {929#(= (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)) (+ (* main_~v~0 main_~v~0) (* main_~u~0 2) (* main_~A~0 4) (* main_~r~0 4)))} is VALID [2022-04-15 09:02:50,796 INFO L290 TraceCheckUtils]: 24: Hoare triple {929#(= (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)) (+ (* main_~v~0 main_~v~0) (* main_~u~0 2) (* main_~A~0 4) (* main_~r~0 4)))} assume !(0 != ~r~0); {933#(= (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)) (+ (* main_~v~0 main_~v~0) (* main_~u~0 2) (* main_~A~0 4)))} is VALID [2022-04-15 09:02:50,797 INFO L272 TraceCheckUtils]: 25: Hoare triple {933#(= (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)) (+ (* main_~v~0 main_~v~0) (* main_~u~0 2) (* main_~A~0 4)))} call __VERIFIER_assert((if 4 * ~A~0 == ~u~0 * ~u~0 - ~v~0 * ~v~0 - 2 * ~u~0 + 2 * ~v~0 then 1 else 0)); {937#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 09:02:50,798 INFO L290 TraceCheckUtils]: 26: Hoare triple {937#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {941#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 09:02:50,798 INFO L290 TraceCheckUtils]: 27: Hoare triple {941#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {854#false} is VALID [2022-04-15 09:02:50,798 INFO L290 TraceCheckUtils]: 28: Hoare triple {854#false} assume !false; {854#false} is VALID [2022-04-15 09:02:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-15 09:02:50,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-15 09:02:51,239 INFO L290 TraceCheckUtils]: 28: Hoare triple {854#false} assume !false; {854#false} is VALID [2022-04-15 09:02:51,240 INFO L290 TraceCheckUtils]: 27: Hoare triple {941#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {854#false} is VALID [2022-04-15 09:02:51,240 INFO L290 TraceCheckUtils]: 26: Hoare triple {937#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {941#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 09:02:51,241 INFO L272 TraceCheckUtils]: 25: Hoare triple {933#(= (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)) (+ (* main_~v~0 main_~v~0) (* main_~u~0 2) (* main_~A~0 4)))} call __VERIFIER_assert((if 4 * ~A~0 == ~u~0 * ~u~0 - ~v~0 * ~v~0 - 2 * ~u~0 + 2 * ~v~0 then 1 else 0)); {937#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 09:02:51,241 INFO L290 TraceCheckUtils]: 24: Hoare triple {960#(or (not (= main_~r~0 0)) (= (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)) (+ (* main_~v~0 main_~v~0) (* main_~u~0 2) (* main_~A~0 4))))} assume !(0 != ~r~0); {933#(= (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)) (+ (* main_~v~0 main_~v~0) (* main_~u~0 2) (* main_~A~0 4)))} is VALID [2022-04-15 09:02:51,242 INFO L284 TraceCheckUtils]: 23: Hoare quadruple {922#(not (= |__VERIFIER_assert_#in~cond| 0))} {853#true} #63#return; {960#(or (not (= main_~r~0 0)) (= (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)) (+ (* main_~v~0 main_~v~0) (* main_~u~0 2) (* main_~A~0 4))))} is VALID [2022-04-15 09:02:51,257 INFO L290 TraceCheckUtils]: 22: Hoare triple {922#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {922#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:02:51,257 INFO L290 TraceCheckUtils]: 21: Hoare triple {973#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} assume !(0 == ~cond); {922#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 09:02:51,257 INFO L290 TraceCheckUtils]: 20: Hoare triple {853#true} ~cond := #in~cond; {973#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-15 09:02:51,257 INFO L272 TraceCheckUtils]: 19: Hoare triple {853#true} call __VERIFIER_assert((if 4 * (~A~0 + ~r~0) == ~u~0 * ~u~0 - ~v~0 * ~v~0 - 2 * ~u~0 + 2 * ~v~0 then 1 else 0)); {853#true} is VALID [2022-04-15 09:02:51,257 INFO L290 TraceCheckUtils]: 18: Hoare triple {853#true} assume !!(#t~post6 < 1);havoc #t~post6; {853#true} is VALID [2022-04-15 09:02:51,258 INFO L290 TraceCheckUtils]: 17: Hoare triple {853#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {853#true} is VALID [2022-04-15 09:02:51,258 INFO L290 TraceCheckUtils]: 16: Hoare triple {853#true} ~u~0 := 1 + 2 * ~R~0;~v~0 := 1;~r~0 := ~R~0 * ~R~0 - ~A~0; {853#true} is VALID [2022-04-15 09:02:51,258 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {853#true} {853#true} #61#return; {853#true} is VALID [2022-04-15 09:02:51,258 INFO L290 TraceCheckUtils]: 14: Hoare triple {853#true} assume true; {853#true} is VALID [2022-04-15 09:02:51,258 INFO L290 TraceCheckUtils]: 13: Hoare triple {853#true} assume !(0 == ~cond); {853#true} is VALID [2022-04-15 09:02:51,258 INFO L290 TraceCheckUtils]: 12: Hoare triple {853#true} ~cond := #in~cond; {853#true} is VALID [2022-04-15 09:02:51,258 INFO L272 TraceCheckUtils]: 11: Hoare triple {853#true} call assume_abort_if_not((if 1 == (if ~A~0 < 0 && 0 != ~A~0 % 2 then ~A~0 % 2 - 2 else ~A~0 % 2) then 1 else 0)); {853#true} is VALID [2022-04-15 09:02:51,258 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {853#true} {853#true} #59#return; {853#true} is VALID [2022-04-15 09:02:51,259 INFO L290 TraceCheckUtils]: 9: Hoare triple {853#true} assume true; {853#true} is VALID [2022-04-15 09:02:51,259 INFO L290 TraceCheckUtils]: 8: Hoare triple {853#true} assume !(0 == ~cond); {853#true} is VALID [2022-04-15 09:02:51,259 INFO L290 TraceCheckUtils]: 7: Hoare triple {853#true} ~cond := #in~cond; {853#true} is VALID [2022-04-15 09:02:51,259 INFO L272 TraceCheckUtils]: 6: Hoare triple {853#true} call assume_abort_if_not((if (~R~0 - 1) * (~R~0 - 1) < ~A~0 then 1 else 0)); {853#true} is VALID [2022-04-15 09:02:51,259 INFO L290 TraceCheckUtils]: 5: Hoare triple {853#true} havoc ~A~0;havoc ~R~0;havoc ~u~0;havoc ~v~0;havoc ~r~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~A~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~R~0 := #t~nondet5;havoc #t~nondet5; {853#true} is VALID [2022-04-15 09:02:51,259 INFO L272 TraceCheckUtils]: 4: Hoare triple {853#true} call #t~ret7 := main(); {853#true} is VALID [2022-04-15 09:02:51,259 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {853#true} {853#true} #67#return; {853#true} is VALID [2022-04-15 09:02:51,259 INFO L290 TraceCheckUtils]: 2: Hoare triple {853#true} assume true; {853#true} is VALID [2022-04-15 09:02:51,259 INFO L290 TraceCheckUtils]: 1: Hoare triple {853#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(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {853#true} is VALID [2022-04-15 09:02:51,259 INFO L272 TraceCheckUtils]: 0: Hoare triple {853#true} call ULTIMATE.init(); {853#true} is VALID [2022-04-15 09:02:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-15 09:02:51,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 09:02:51,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385241284] [2022-04-15 09:02:51,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 09:02:51,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055007124] [2022-04-15 09:02:51,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055007124] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-15 09:02:51,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-15 09:02:51,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-15 09:02:51,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 09:02:51,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1109735641] [2022-04-15 09:02:51,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1109735641] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 09:02:51,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 09:02:51,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-15 09:02:51,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70491509] [2022-04-15 09:02:51,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 09:02:51,261 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-04-15 09:02:51,261 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 09:02:51,261 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-15 09:02:51,283 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 26 edges. 26 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 09:02:51,283 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-15 09:02:51,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 09:02:51,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-15 09:02:51,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-15 09:02:51,284 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-15 09:02:51,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:02:51,533 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-04-15 09:02:51,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-15 09:02:51,533 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-04-15 09:02:51,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 09:02:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-15 09:02:51,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 35 transitions. [2022-04-15 09:02:51,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-15 09:02:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 35 transitions. [2022-04-15 09:02:51,536 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 8 states and 35 transitions. [2022-04-15 09:02:51,565 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 09:02:51,566 INFO L225 Difference]: With dead ends: 43 [2022-04-15 09:02:51,567 INFO L226 Difference]: Without dead ends: 38 [2022-04-15 09:02:51,567 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-15 09:02:51,567 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-15 09:02:51,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 103 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-15 09:02:51,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-15 09:02:51,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2022-04-15 09:02:51,583 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 09:02:51,583 INFO L82 GeneralOperation]: Start isEquivalent. First operand 38 states. Second operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 09:02:51,584 INFO L74 IsIncluded]: Start isIncluded. First operand 38 states. Second operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 09:02:51,584 INFO L87 Difference]: Start difference. First operand 38 states. Second operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 09:02:51,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:02:51,585 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-04-15 09:02:51,585 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-04-15 09:02:51,585 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:02:51,585 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:02:51,585 INFO L74 IsIncluded]: Start isIncluded. First operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 38 states. [2022-04-15 09:02:51,586 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 38 states. [2022-04-15 09:02:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 09:02:51,587 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-04-15 09:02:51,587 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-04-15 09:02:51,587 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 09:02:51,587 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 09:02:51,587 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 09:02:51,587 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 09:02:51,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 09:02:51,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-04-15 09:02:51,588 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-04-15 09:02:51,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 09:02:51,599 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-04-15 09:02:51,599 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-15 09:02:51,599 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 29 states and 31 transitions. [2022-04-15 09:02:52,420 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 09:02:52,421 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-04-15 09:02:52,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-15 09:02:52,421 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 09:02:52,421 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 09:02:52,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-15 09:02:52,621 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 09:02:52,622 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 09:02:52,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 09:02:52,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2022-04-15 09:02:52,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 09:02:52,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1017935032] [2022-04-15 09:02:52,623 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 09:02:52,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 2 times [2022-04-15 09:02:52,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 09:02:52,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86290855] [2022-04-15 09:02:52,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 09:02:52,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 09:02:52,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 09:02:52,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1967460836] [2022-04-15 09:02:52,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 09:02:52,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 09:02:52,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 09:02:52,636 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 09:02:52,637 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 09:02:52,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-15 09:02:52,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-04-15 09:02:52,677 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-15 09:02:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-15 09:02:52,717 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-15 09:02:52,717 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-04-15 09:02:52,717 INFO L618 BasicCegarLoop]: Counterexample is feasible [2022-04-15 09:02:52,718 INFO L788 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-15 09:02:52,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-15 09:02:52,920 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 09:02:52,922 INFO L719 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2] [2022-04-15 09:02:52,924 INFO L177 ceAbstractionStarter]: Computing trace abstraction results [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: reach_errorENTRY has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: ULTIMATE.initENTRY has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: assume_abort_if_notENTRY has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: __VERIFIER_assertENTRY has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: reach_errorFINAL has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: L9 has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: L9 has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: L26 has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: L26 has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: L12 has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: L12 has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: L9-2 has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: L26-1 has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: L26-1 has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: L13 has no Hoare annotation [2022-04-15 09:02:52,934 WARN L170 areAnnotationChecker]: L13 has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: L12-2 has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: assume_abort_if_notEXIT has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: assume_abort_if_notEXIT has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: L28 has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: L38-2 has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: L38-2 has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: L35-1 has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: L35-1 has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: L48 has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: L34-3 has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: L34-3 has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: L34-1 has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: L34-1 has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: L38 has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: L38 has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: L35 has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: L35 has no Hoare annotation [2022-04-15 09:02:52,935 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2022-04-15 09:02:52,935 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2022-04-15 09:02:52,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 09:02:52 BoogieIcfgContainer [2022-04-15 09:02:52,936 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-15 09:02:52,937 INFO L158 Benchmark]: Toolchain (without parser) took 19613.22ms. Allocated memory was 180.4MB in the beginning and 217.1MB in the end (delta: 36.7MB). Free memory was 131.7MB in the beginning and 110.6MB in the end (delta: 21.1MB). Peak memory consumption was 57.5MB. Max. memory is 8.0GB. [2022-04-15 09:02:52,937 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 180.4MB. Free memory was 147.8MB in the beginning and 147.6MB in the end (delta: 151.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-15 09:02:52,937 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.87ms. Allocated memory is still 180.4MB. Free memory was 131.4MB in the beginning and 155.5MB in the end (delta: -24.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-15 09:02:52,937 INFO L158 Benchmark]: Boogie Preprocessor took 27.94ms. Allocated memory is still 180.4MB. Free memory was 155.5MB in the beginning and 154.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-15 09:02:52,937 INFO L158 Benchmark]: RCFGBuilder took 259.53ms. Allocated memory is still 180.4MB. Free memory was 154.1MB in the beginning and 142.9MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-15 09:02:52,938 INFO L158 Benchmark]: TraceAbstraction took 19141.48ms. Allocated memory was 180.4MB in the beginning and 217.1MB in the end (delta: 36.7MB). Free memory was 142.5MB in the beginning and 110.6MB in the end (delta: 31.9MB). Peak memory consumption was 69.4MB. Max. memory is 8.0GB. [2022-04-15 09:02:52,939 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 180.4MB. Free memory was 147.8MB in the beginning and 147.6MB in the end (delta: 151.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 180.87ms. Allocated memory is still 180.4MB. Free memory was 131.4MB in the beginning and 155.5MB in the end (delta: -24.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.94ms. Allocated memory is still 180.4MB. Free memory was 155.5MB in the beginning and 154.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 259.53ms. Allocated memory is still 180.4MB. Free memory was 154.1MB in the beginning and 142.9MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 19141.48ms. Allocated memory was 180.4MB in the beginning and 217.1MB in the end (delta: 36.7MB). Free memory was 142.5MB in the beginning and 110.6MB in the end (delta: 31.9MB). Peak memory consumption was 69.4MB. 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 - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) [L28] CALL assume_abort_if_not(A % 2 == 1) [L9] COND FALSE !(!cond) [L28] RET assume_abort_if_not(A % 2 == 1) [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A [L34] EXPR counter++ [L34] COND TRUE counter++<1 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L12] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) [L36] COND FALSE !(!(r != 0)) [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 [L34] EXPR counter++ [L34] COND FALSE !(counter++<1) [L48] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 19.1s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 8.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 26 SdHoareTripleChecker+Valid, 3.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 25 mSDsluCounter, 289 SdHoareTripleChecker+Invalid, 3.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 183 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 98 IncrementalHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 106 mSDtfsCounter, 98 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=3, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, 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 RESULT: Ultimate proved your program to be incorrect! [2022-04-15 09:02:52,951 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...