/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/ps4-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-fb4f59a-m [2022-04-28 07:41:21,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-28 07:41:21,477 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-28 07:41:21,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-28 07:41:21,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-28 07:41:21,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-28 07:41:21,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-28 07:41:21,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-28 07:41:21,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-28 07:41:21,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-28 07:41:21,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-28 07:41:21,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-28 07:41:21,544 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-28 07:41:21,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-28 07:41:21,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-28 07:41:21,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-28 07:41:21,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-28 07:41:21,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-28 07:41:21,558 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-28 07:41:21,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-28 07:41:21,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-28 07:41:21,560 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-28 07:41:21,569 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-28 07:41:21,570 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-28 07:41:21,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-28 07:41:21,571 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-28 07:41:21,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-28 07:41:21,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-28 07:41:21,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-28 07:41:21,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-28 07:41:21,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-28 07:41:21,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-28 07:41:21,572 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-28 07:41:21,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-28 07:41:21,572 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-28 07:41:21,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-28 07:41:21,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-28 07:41:21,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-28 07:41:21,573 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-28 07:41:21,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-28 07:41:21,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-28 07:41:21,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-28 07:41:21,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-28 07:41:21,573 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-28 07:41:21,573 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-28 07:41:21,573 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-28 07:41:21,573 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-28 07:41:21,574 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-28 07:41:21,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-28 07:41:21,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-28 07:41:21,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-28 07:41:21,748 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-28 07:41:21,748 INFO L275 PluginConnector]: CDTParser initialized [2022-04-28 07:41:21,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound2.c [2022-04-28 07:41:21,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2f8acd63/52aa8b1f5dde466aa31d386cd8f2bcca/FLAGc53e1972d [2022-04-28 07:41:22,144 INFO L306 CDTParser]: Found 1 translation units. [2022-04-28 07:41:22,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound2.c [2022-04-28 07:41:22,149 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2f8acd63/52aa8b1f5dde466aa31d386cd8f2bcca/FLAGc53e1972d [2022-04-28 07:41:22,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2f8acd63/52aa8b1f5dde466aa31d386cd8f2bcca [2022-04-28 07:41:22,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-28 07:41:22,161 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-28 07:41:22,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-28 07:41:22,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-28 07:41:22,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-28 07:41:22,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.04 07:41:22" (1/1) ... [2022-04-28 07:41:22,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bc8317a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:41:22, skipping insertion in model container [2022-04-28 07:41:22,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.04 07:41:22" (1/1) ... [2022-04-28 07:41:22,172 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-28 07:41:22,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-28 07:41:22,291 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/ps4-ll_unwindbound2.c[458,471] [2022-04-28 07:41:22,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-28 07:41:22,317 INFO L203 MainTranslator]: Completed pre-run [2022-04-28 07:41:22,326 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/ps4-ll_unwindbound2.c[458,471] [2022-04-28 07:41:22,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-28 07:41:22,342 INFO L208 MainTranslator]: Completed translation [2022-04-28 07:41:22,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:41:22 WrapperNode [2022-04-28 07:41:22,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-28 07:41:22,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-28 07:41:22,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-28 07:41:22,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-28 07:41:22,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:41:22" (1/1) ... [2022-04-28 07:41:22,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:41:22" (1/1) ... [2022-04-28 07:41:22,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:41:22" (1/1) ... [2022-04-28 07:41:22,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:41:22" (1/1) ... [2022-04-28 07:41:22,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:41:22" (1/1) ... [2022-04-28 07:41:22,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:41:22" (1/1) ... [2022-04-28 07:41:22,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:41:22" (1/1) ... [2022-04-28 07:41:22,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-28 07:41:22,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-28 07:41:22,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-28 07:41:22,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-28 07:41:22,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:41:22" (1/1) ... [2022-04-28 07:41:22,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-28 07:41:22,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 07:41:22,408 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-28 07:41:22,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-28 07:41:22,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-28 07:41:22,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-28 07:41:22,440 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-28 07:41:22,441 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-28 07:41:22,441 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-28 07:41:22,441 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-28 07:41:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-28 07:41:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-28 07:41:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-28 07:41:22,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-28 07:41:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-04-28 07:41:22,442 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-28 07:41:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-28 07:41:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-28 07:41:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-28 07:41:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-28 07:41:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-28 07:41:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-28 07:41:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-28 07:41:22,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-28 07:41:22,491 INFO L234 CfgBuilder]: Building ICFG [2022-04-28 07:41:22,492 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-28 07:41:22,580 INFO L275 CfgBuilder]: Performing block encoding [2022-04-28 07:41:22,585 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-28 07:41:22,585 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-28 07:41:22,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 07:41:22 BoogieIcfgContainer [2022-04-28 07:41:22,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-28 07:41:22,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-28 07:41:22,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-28 07:41:22,594 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-28 07:41:22,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.04 07:41:22" (1/3) ... [2022-04-28 07:41:22,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52261769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 07:41:22, skipping insertion in model container [2022-04-28 07:41:22,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 07:41:22" (2/3) ... [2022-04-28 07:41:22,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52261769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 07:41:22, skipping insertion in model container [2022-04-28 07:41:22,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 07:41:22" (3/3) ... [2022-04-28 07:41:22,596 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound2.c [2022-04-28 07:41:22,606 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-28 07:41:22,606 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-28 07:41:22,639 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-28 07:41:22,643 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@26749a1e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@580970e [2022-04-28 07:41:22,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-28 07:41:22,649 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-28 07:41:22,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-28 07:41:22,654 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 07:41:22,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 07:41:22,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 07:41:22,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 07:41:22,658 INFO L85 PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 1 times [2022-04-28 07:41:22,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 07:41:22,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1153789321] [2022-04-28 07:41:22,669 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 07:41:22,670 INFO L85 PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 2 times [2022-04-28 07:41:22,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 07:41:22,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992406881] [2022-04-28 07:41:22,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 07:41:22,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 07:41:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 07:41:22,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-28 07:41:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 07:41:22,779 INFO L290 TraceCheckUtils]: 0: Hoare triple {31#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {26#true} is VALID [2022-04-28 07:41:22,780 INFO L290 TraceCheckUtils]: 1: Hoare triple {26#true} assume true; {26#true} is VALID [2022-04-28 07:41:22,780 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {26#true} {26#true} #57#return; {26#true} is VALID [2022-04-28 07:41:22,781 INFO L272 TraceCheckUtils]: 0: Hoare triple {26#true} call ULTIMATE.init(); {31#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-28 07:41:22,782 INFO L290 TraceCheckUtils]: 1: Hoare triple {31#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {26#true} is VALID [2022-04-28 07:41:22,782 INFO L290 TraceCheckUtils]: 2: Hoare triple {26#true} assume true; {26#true} is VALID [2022-04-28 07:41:22,782 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {26#true} {26#true} #57#return; {26#true} is VALID [2022-04-28 07:41:22,782 INFO L272 TraceCheckUtils]: 4: Hoare triple {26#true} call #t~ret6 := main(); {26#true} is VALID [2022-04-28 07:41:22,782 INFO L290 TraceCheckUtils]: 5: Hoare triple {26#true} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -32768 <= #t~nondet4 && #t~nondet4 <= 32767;~k~0 := #t~nondet4;havoc #t~nondet4;~y~0 := 0;~x~0 := 0;~c~0 := 0; {26#true} is VALID [2022-04-28 07:41:22,783 INFO L290 TraceCheckUtils]: 6: Hoare triple {26#true} assume !true; {27#false} is VALID [2022-04-28 07:41:22,783 INFO L272 TraceCheckUtils]: 7: Hoare triple {27#false} call __VERIFIER_assert((if 0 == ~k~0 * ~y~0 - ~y~0 * ~y~0 then 1 else 0)); {27#false} is VALID [2022-04-28 07:41:22,783 INFO L290 TraceCheckUtils]: 8: Hoare triple {27#false} ~cond := #in~cond; {27#false} is VALID [2022-04-28 07:41:22,783 INFO L290 TraceCheckUtils]: 9: Hoare triple {27#false} assume 0 == ~cond; {27#false} is VALID [2022-04-28 07:41:22,783 INFO L290 TraceCheckUtils]: 10: Hoare triple {27#false} assume !false; {27#false} is VALID [2022-04-28 07:41:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 07:41:22,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 07:41:22,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992406881] [2022-04-28 07:41:22,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992406881] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 07:41:22,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 07:41:22,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-28 07:41:22,787 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 07:41:22,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1153789321] [2022-04-28 07:41:22,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1153789321] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 07:41:22,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 07:41:22,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-28 07:41:22,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220063317] [2022-04-28 07:41:22,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 07:41:22,791 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-28 07:41:22,792 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 07:41:22,794 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:41:22,808 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 11 edges. 11 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:22,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-28 07:41:22,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 07:41:22,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-28 07:41:22,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-28 07:41:22,824 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:41:22,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:22,940 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2022-04-28 07:41:22,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-28 07:41:22,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-28 07:41:22,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 07:41:22,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:41:22,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2022-04-28 07:41:22,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:41:22,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2022-04-28 07:41:22,959 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 55 transitions. [2022-04-28 07:41:23,029 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 55 edges. 55 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:23,037 INFO L225 Difference]: With dead ends: 41 [2022-04-28 07:41:23,037 INFO L226 Difference]: Without dead ends: 19 [2022-04-28 07:41:23,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-28 07:41:23,041 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 07:41:23,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 07:41:23,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-28 07:41:23,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-04-28 07:41:23,060 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 07:41:23,061 INFO L82 GeneralOperation]: Start isEquivalent. First operand 19 states. Second operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:41:23,061 INFO L74 IsIncluded]: Start isIncluded. First operand 19 states. Second operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:41:23,062 INFO L87 Difference]: Start difference. First operand 19 states. Second operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:41:23,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:23,064 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-04-28 07:41:23,065 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-04-28 07:41:23,065 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:41:23,065 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:41:23,065 INFO L74 IsIncluded]: Start isIncluded. First operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 19 states. [2022-04-28 07:41:23,066 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 19 states. [2022-04-28 07:41:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:23,067 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2022-04-28 07:41:23,068 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-04-28 07:41:23,068 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:41:23,068 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:41:23,068 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 07:41:23,068 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 07:41:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:41:23,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-04-28 07:41:23,070 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2022-04-28 07:41:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 07:41:23,071 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-04-28 07:41:23,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:41:23,071 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 18 states and 21 transitions. [2022-04-28 07:41:23,090 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 21 edges. 21 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-04-28 07:41:23,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-28 07:41:23,090 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 07:41:23,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 07:41:23,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-28 07:41:23,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 07:41:23,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 07:41:23,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 1 times [2022-04-28 07:41:23,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 07:41:23,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [217810580] [2022-04-28 07:41:23,092 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 07:41:23,093 INFO L85 PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 2 times [2022-04-28 07:41:23,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 07:41:23,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201286100] [2022-04-28 07:41:23,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 07:41:23,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 07:41:23,106 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 07:41:23,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550857851] [2022-04-28 07:41:23,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 07:41:23,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 07:41:23,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 07:41:23,108 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-28 07:41:23,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-28 07:41:23,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-28 07:41:23,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 07:41:23,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-28 07:41:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 07:41:23,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 07:41:23,304 INFO L272 TraceCheckUtils]: 0: Hoare triple {190#true} call ULTIMATE.init(); {190#true} is VALID [2022-04-28 07:41:23,309 INFO L290 TraceCheckUtils]: 1: Hoare triple {190#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {198#(<= ~counter~0 0)} is VALID [2022-04-28 07:41:23,309 INFO L290 TraceCheckUtils]: 2: Hoare triple {198#(<= ~counter~0 0)} assume true; {198#(<= ~counter~0 0)} is VALID [2022-04-28 07:41:23,310 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {198#(<= ~counter~0 0)} {190#true} #57#return; {198#(<= ~counter~0 0)} is VALID [2022-04-28 07:41:23,310 INFO L272 TraceCheckUtils]: 4: Hoare triple {198#(<= ~counter~0 0)} call #t~ret6 := main(); {198#(<= ~counter~0 0)} is VALID [2022-04-28 07:41:23,311 INFO L290 TraceCheckUtils]: 5: Hoare triple {198#(<= ~counter~0 0)} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -32768 <= #t~nondet4 && #t~nondet4 <= 32767;~k~0 := #t~nondet4;havoc #t~nondet4;~y~0 := 0;~x~0 := 0;~c~0 := 0; {198#(<= ~counter~0 0)} is VALID [2022-04-28 07:41:23,311 INFO L290 TraceCheckUtils]: 6: Hoare triple {198#(<= ~counter~0 0)} #t~post5 := ~counter~0;~counter~0 := 1 + #t~post5; {214#(<= |main_#t~post5| 0)} is VALID [2022-04-28 07:41:23,312 INFO L290 TraceCheckUtils]: 7: Hoare triple {214#(<= |main_#t~post5| 0)} assume !(#t~post5 < 2);havoc #t~post5; {191#false} is VALID [2022-04-28 07:41:23,312 INFO L272 TraceCheckUtils]: 8: Hoare triple {191#false} call __VERIFIER_assert((if 0 == ~k~0 * ~y~0 - ~y~0 * ~y~0 then 1 else 0)); {191#false} is VALID [2022-04-28 07:41:23,312 INFO L290 TraceCheckUtils]: 9: Hoare triple {191#false} ~cond := #in~cond; {191#false} is VALID [2022-04-28 07:41:23,312 INFO L290 TraceCheckUtils]: 10: Hoare triple {191#false} assume 0 == ~cond; {191#false} is VALID [2022-04-28 07:41:23,312 INFO L290 TraceCheckUtils]: 11: Hoare triple {191#false} assume !false; {191#false} is VALID [2022-04-28 07:41:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 07:41:23,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 07:41:23,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 07:41:23,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201286100] [2022-04-28 07:41:23,313 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 07:41:23,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550857851] [2022-04-28 07:41:23,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550857851] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 07:41:23,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 07:41:23,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-28 07:41:23,315 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 07:41:23,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [217810580] [2022-04-28 07:41:23,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [217810580] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 07:41:23,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 07:41:23,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-28 07:41:23,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793012761] [2022-04-28 07:41:23,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 07:41:23,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 07:41:23,317 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 07:41:23,317 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:41:23,328 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:23,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-28 07:41:23,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 07:41:23,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-28 07:41:23,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-28 07:41:23,329 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:41:23,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:23,402 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-04-28 07:41:23,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-28 07:41:23,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 07:41:23,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 07:41:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:41:23,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 32 transitions. [2022-04-28 07:41:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:41:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 32 transitions. [2022-04-28 07:41:23,409 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 32 transitions. [2022-04-28 07:41:23,433 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 32 edges. 32 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:23,435 INFO L225 Difference]: With dead ends: 28 [2022-04-28 07:41:23,435 INFO L226 Difference]: Without dead ends: 20 [2022-04-28 07:41:23,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-28 07:41:23,437 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 07:41:23,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 51 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 07:41:23,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-28 07:41:23,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-04-28 07:41:23,468 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 07:41:23,469 INFO L82 GeneralOperation]: Start isEquivalent. First operand 20 states. Second operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:41:23,469 INFO L74 IsIncluded]: Start isIncluded. First operand 20 states. Second operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:41:23,469 INFO L87 Difference]: Start difference. First operand 20 states. Second operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:41:23,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:23,470 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-04-28 07:41:23,471 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-04-28 07:41:23,471 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:41:23,471 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:41:23,471 INFO L74 IsIncluded]: Start isIncluded. First operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 20 states. [2022-04-28 07:41:23,472 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 20 states. [2022-04-28 07:41:23,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:23,473 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-04-28 07:41:23,473 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-04-28 07:41:23,473 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:41:23,473 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:41:23,473 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 07:41:23,474 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 07:41:23,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:41:23,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-04-28 07:41:23,475 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2022-04-28 07:41:23,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 07:41:23,475 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-04-28 07:41:23,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:41:23,476 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 20 states and 23 transitions. [2022-04-28 07:41:23,494 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 23 edges. 23 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:23,494 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-04-28 07:41:23,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-28 07:41:23,495 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 07:41:23,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 07:41:23,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-28 07:41:23,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 07:41:23,702 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 07:41:23,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 07:41:23,703 INFO L85 PathProgramCache]: Analyzing trace with hash -2116914163, now seen corresponding path program 1 times [2022-04-28 07:41:23,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 07:41:23,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1764364977] [2022-04-28 07:41:23,704 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 07:41:23,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2116914163, now seen corresponding path program 2 times [2022-04-28 07:41:23,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 07:41:23,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884759837] [2022-04-28 07:41:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 07:41:23,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 07:41:23,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 07:41:23,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561284526] [2022-04-28 07:41:23,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 07:41:23,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 07:41:23,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 07:41:23,719 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-28 07:41:23,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-28 07:41:23,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-28 07:41:23,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 07:41:23,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-28 07:41:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 07:41:23,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 07:41:23,860 INFO L272 TraceCheckUtils]: 0: Hoare triple {365#true} call ULTIMATE.init(); {365#true} is VALID [2022-04-28 07:41:23,860 INFO L290 TraceCheckUtils]: 1: Hoare triple {365#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {365#true} is VALID [2022-04-28 07:41:23,861 INFO L290 TraceCheckUtils]: 2: Hoare triple {365#true} assume true; {365#true} is VALID [2022-04-28 07:41:23,861 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {365#true} {365#true} #57#return; {365#true} is VALID [2022-04-28 07:41:23,861 INFO L272 TraceCheckUtils]: 4: Hoare triple {365#true} call #t~ret6 := main(); {365#true} is VALID [2022-04-28 07:41:23,861 INFO L290 TraceCheckUtils]: 5: Hoare triple {365#true} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -32768 <= #t~nondet4 && #t~nondet4 <= 32767;~k~0 := #t~nondet4;havoc #t~nondet4;~y~0 := 0;~x~0 := 0;~c~0 := 0; {385#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-28 07:41:23,862 INFO L290 TraceCheckUtils]: 6: Hoare triple {385#(and (= main_~x~0 0) (= main_~y~0 0))} #t~post5 := ~counter~0;~counter~0 := 1 + #t~post5; {385#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-28 07:41:23,862 INFO L290 TraceCheckUtils]: 7: Hoare triple {385#(and (= main_~x~0 0) (= main_~y~0 0))} assume !!(#t~post5 < 2);havoc #t~post5; {385#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-28 07:41:23,864 INFO L272 TraceCheckUtils]: 8: Hoare triple {385#(and (= main_~x~0 0) (= main_~y~0 0))} call __VERIFIER_assert((if 0 == 4 * ~x~0 - ~y~0 * ~y~0 * ~y~0 * ~y~0 - 2 * ~y~0 * ~y~0 * ~y~0 - ~y~0 * ~y~0 then 1 else 0)); {395#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 07:41:23,864 INFO L290 TraceCheckUtils]: 9: Hoare triple {395#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {399#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 07:41:23,864 INFO L290 TraceCheckUtils]: 10: Hoare triple {399#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {366#false} is VALID [2022-04-28 07:41:23,865 INFO L290 TraceCheckUtils]: 11: Hoare triple {366#false} assume !false; {366#false} is VALID [2022-04-28 07:41:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 07:41:23,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 07:41:23,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 07:41:23,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884759837] [2022-04-28 07:41:23,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 07:41:23,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561284526] [2022-04-28 07:41:23,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561284526] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 07:41:23,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 07:41:23,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 07:41:23,866 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 07:41:23,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1764364977] [2022-04-28 07:41:23,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1764364977] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 07:41:23,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 07:41:23,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 07:41:23,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141083925] [2022-04-28 07:41:23,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 07:41:23,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 07:41:23,867 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 07:41:23,867 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:41:23,876 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 12 edges. 12 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:23,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-28 07:41:23,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 07:41:23,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-28 07:41:23,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-28 07:41:23,877 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:41:23,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:23,971 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-04-28 07:41:23,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-28 07:41:23,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-28 07:41:23,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 07:41:23,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:41:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 35 transitions. [2022-04-28 07:41:23,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:41:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 35 transitions. [2022-04-28 07:41:23,974 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 35 transitions. [2022-04-28 07:41:23,999 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 35 edges. 35 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:24,000 INFO L225 Difference]: With dead ends: 30 [2022-04-28 07:41:24,000 INFO L226 Difference]: Without dead ends: 26 [2022-04-28 07:41:24,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-28 07:41:24,001 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 07:41:24,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 64 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 07:41:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-28 07:41:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-28 07:41:24,011 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 07:41:24,011 INFO L82 GeneralOperation]: Start isEquivalent. First operand 26 states. Second operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 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) [2022-04-28 07:41:24,012 INFO L74 IsIncluded]: Start isIncluded. First operand 26 states. Second operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 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) [2022-04-28 07:41:24,012 INFO L87 Difference]: Start difference. First operand 26 states. Second operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 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) [2022-04-28 07:41:24,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:24,013 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-04-28 07:41:24,013 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-04-28 07:41:24,014 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:41:24,014 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:41:24,014 INFO L74 IsIncluded]: Start isIncluded. First operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 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 26 states. [2022-04-28 07:41:24,014 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 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 26 states. [2022-04-28 07:41:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:24,015 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-04-28 07:41:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-04-28 07:41:24,016 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:41:24,016 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:41:24,016 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 07:41:24,016 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 07:41:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 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) [2022-04-28 07:41:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-04-28 07:41:24,018 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2022-04-28 07:41:24,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 07:41:24,018 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-04-28 07:41:24,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 07:41:24,018 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 26 states and 29 transitions. [2022-04-28 07:41:24,041 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 29 edges. 29 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:24,041 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-04-28 07:41:24,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-28 07:41:24,042 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 07:41:24,042 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 07:41:24,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-28 07:41:24,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-28 07:41:24,260 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 07:41:24,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 07:41:24,260 INFO L85 PathProgramCache]: Analyzing trace with hash -263585780, now seen corresponding path program 1 times [2022-04-28 07:41:24,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 07:41:24,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1991661408] [2022-04-28 07:41:24,451 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-28 07:41:24,451 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-28 07:41:24,451 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-28 07:41:24,452 INFO L85 PathProgramCache]: Analyzing trace with hash -263585780, now seen corresponding path program 2 times [2022-04-28 07:41:24,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 07:41:24,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986439518] [2022-04-28 07:41:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 07:41:24,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 07:41:24,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 07:41:24,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083573848] [2022-04-28 07:41:24,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 07:41:24,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 07:41:24,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 07:41:24,464 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-28 07:41:24,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-28 07:41:24,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-28 07:41:24,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 07:41:24,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-28 07:41:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 07:41:24,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 07:41:24,634 INFO L272 TraceCheckUtils]: 0: Hoare triple {571#true} call ULTIMATE.init(); {571#true} is VALID [2022-04-28 07:41:24,634 INFO L290 TraceCheckUtils]: 1: Hoare triple {571#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {579#(<= ~counter~0 0)} is VALID [2022-04-28 07:41:24,635 INFO L290 TraceCheckUtils]: 2: Hoare triple {579#(<= ~counter~0 0)} assume true; {579#(<= ~counter~0 0)} is VALID [2022-04-28 07:41:24,636 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {579#(<= ~counter~0 0)} {571#true} #57#return; {579#(<= ~counter~0 0)} is VALID [2022-04-28 07:41:24,636 INFO L272 TraceCheckUtils]: 4: Hoare triple {579#(<= ~counter~0 0)} call #t~ret6 := main(); {579#(<= ~counter~0 0)} is VALID [2022-04-28 07:41:24,640 INFO L290 TraceCheckUtils]: 5: Hoare triple {579#(<= ~counter~0 0)} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -32768 <= #t~nondet4 && #t~nondet4 <= 32767;~k~0 := #t~nondet4;havoc #t~nondet4;~y~0 := 0;~x~0 := 0;~c~0 := 0; {579#(<= ~counter~0 0)} is VALID [2022-04-28 07:41:24,641 INFO L290 TraceCheckUtils]: 6: Hoare triple {579#(<= ~counter~0 0)} #t~post5 := ~counter~0;~counter~0 := 1 + #t~post5; {595#(<= ~counter~0 1)} is VALID [2022-04-28 07:41:24,645 INFO L290 TraceCheckUtils]: 7: Hoare triple {595#(<= ~counter~0 1)} assume !!(#t~post5 < 2);havoc #t~post5; {595#(<= ~counter~0 1)} is VALID [2022-04-28 07:41:24,646 INFO L272 TraceCheckUtils]: 8: Hoare triple {595#(<= ~counter~0 1)} call __VERIFIER_assert((if 0 == 4 * ~x~0 - ~y~0 * ~y~0 * ~y~0 * ~y~0 - 2 * ~y~0 * ~y~0 * ~y~0 - ~y~0 * ~y~0 then 1 else 0)); {595#(<= ~counter~0 1)} is VALID [2022-04-28 07:41:24,646 INFO L290 TraceCheckUtils]: 9: Hoare triple {595#(<= ~counter~0 1)} ~cond := #in~cond; {595#(<= ~counter~0 1)} is VALID [2022-04-28 07:41:24,646 INFO L290 TraceCheckUtils]: 10: Hoare triple {595#(<= ~counter~0 1)} assume !(0 == ~cond); {595#(<= ~counter~0 1)} is VALID [2022-04-28 07:41:24,647 INFO L290 TraceCheckUtils]: 11: Hoare triple {595#(<= ~counter~0 1)} assume true; {595#(<= ~counter~0 1)} is VALID [2022-04-28 07:41:24,647 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {595#(<= ~counter~0 1)} {595#(<= ~counter~0 1)} #51#return; {595#(<= ~counter~0 1)} is VALID [2022-04-28 07:41:24,647 INFO L290 TraceCheckUtils]: 13: Hoare triple {595#(<= ~counter~0 1)} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~y~0 := 1 + ~y~0;~x~0 := ~y~0 * ~y~0 * ~y~0 + ~x~0; {595#(<= ~counter~0 1)} is VALID [2022-04-28 07:41:24,648 INFO L290 TraceCheckUtils]: 14: Hoare triple {595#(<= ~counter~0 1)} #t~post5 := ~counter~0;~counter~0 := 1 + #t~post5; {620#(<= |main_#t~post5| 1)} is VALID [2022-04-28 07:41:24,648 INFO L290 TraceCheckUtils]: 15: Hoare triple {620#(<= |main_#t~post5| 1)} assume !(#t~post5 < 2);havoc #t~post5; {572#false} is VALID [2022-04-28 07:41:24,648 INFO L272 TraceCheckUtils]: 16: Hoare triple {572#false} call __VERIFIER_assert((if 0 == ~k~0 * ~y~0 - ~y~0 * ~y~0 then 1 else 0)); {572#false} is VALID [2022-04-28 07:41:24,648 INFO L290 TraceCheckUtils]: 17: Hoare triple {572#false} ~cond := #in~cond; {572#false} is VALID [2022-04-28 07:41:24,649 INFO L290 TraceCheckUtils]: 18: Hoare triple {572#false} assume 0 == ~cond; {572#false} is VALID [2022-04-28 07:41:24,649 INFO L290 TraceCheckUtils]: 19: Hoare triple {572#false} assume !false; {572#false} is VALID [2022-04-28 07:41:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 07:41:24,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-28 07:41:24,762 INFO L290 TraceCheckUtils]: 19: Hoare triple {572#false} assume !false; {572#false} is VALID [2022-04-28 07:41:24,762 INFO L290 TraceCheckUtils]: 18: Hoare triple {572#false} assume 0 == ~cond; {572#false} is VALID [2022-04-28 07:41:24,762 INFO L290 TraceCheckUtils]: 17: Hoare triple {572#false} ~cond := #in~cond; {572#false} is VALID [2022-04-28 07:41:24,762 INFO L272 TraceCheckUtils]: 16: Hoare triple {572#false} call __VERIFIER_assert((if 0 == ~k~0 * ~y~0 - ~y~0 * ~y~0 then 1 else 0)); {572#false} is VALID [2022-04-28 07:41:24,763 INFO L290 TraceCheckUtils]: 15: Hoare triple {620#(<= |main_#t~post5| 1)} assume !(#t~post5 < 2);havoc #t~post5; {572#false} is VALID [2022-04-28 07:41:24,763 INFO L290 TraceCheckUtils]: 14: Hoare triple {595#(<= ~counter~0 1)} #t~post5 := ~counter~0;~counter~0 := 1 + #t~post5; {620#(<= |main_#t~post5| 1)} is VALID [2022-04-28 07:41:24,764 INFO L290 TraceCheckUtils]: 13: Hoare triple {595#(<= ~counter~0 1)} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~y~0 := 1 + ~y~0;~x~0 := ~y~0 * ~y~0 * ~y~0 + ~x~0; {595#(<= ~counter~0 1)} is VALID [2022-04-28 07:41:24,764 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {571#true} {595#(<= ~counter~0 1)} #51#return; {595#(<= ~counter~0 1)} is VALID [2022-04-28 07:41:24,764 INFO L290 TraceCheckUtils]: 11: Hoare triple {571#true} assume true; {571#true} is VALID [2022-04-28 07:41:24,764 INFO L290 TraceCheckUtils]: 10: Hoare triple {571#true} assume !(0 == ~cond); {571#true} is VALID [2022-04-28 07:41:24,765 INFO L290 TraceCheckUtils]: 9: Hoare triple {571#true} ~cond := #in~cond; {571#true} is VALID [2022-04-28 07:41:24,765 INFO L272 TraceCheckUtils]: 8: Hoare triple {595#(<= ~counter~0 1)} call __VERIFIER_assert((if 0 == 4 * ~x~0 - ~y~0 * ~y~0 * ~y~0 * ~y~0 - 2 * ~y~0 * ~y~0 * ~y~0 - ~y~0 * ~y~0 then 1 else 0)); {571#true} is VALID [2022-04-28 07:41:24,765 INFO L290 TraceCheckUtils]: 7: Hoare triple {595#(<= ~counter~0 1)} assume !!(#t~post5 < 2);havoc #t~post5; {595#(<= ~counter~0 1)} is VALID [2022-04-28 07:41:24,765 INFO L290 TraceCheckUtils]: 6: Hoare triple {579#(<= ~counter~0 0)} #t~post5 := ~counter~0;~counter~0 := 1 + #t~post5; {595#(<= ~counter~0 1)} is VALID [2022-04-28 07:41:24,766 INFO L290 TraceCheckUtils]: 5: Hoare triple {579#(<= ~counter~0 0)} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -32768 <= #t~nondet4 && #t~nondet4 <= 32767;~k~0 := #t~nondet4;havoc #t~nondet4;~y~0 := 0;~x~0 := 0;~c~0 := 0; {579#(<= ~counter~0 0)} is VALID [2022-04-28 07:41:24,766 INFO L272 TraceCheckUtils]: 4: Hoare triple {579#(<= ~counter~0 0)} call #t~ret6 := main(); {579#(<= ~counter~0 0)} is VALID [2022-04-28 07:41:24,766 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {579#(<= ~counter~0 0)} {571#true} #57#return; {579#(<= ~counter~0 0)} is VALID [2022-04-28 07:41:24,767 INFO L290 TraceCheckUtils]: 2: Hoare triple {579#(<= ~counter~0 0)} assume true; {579#(<= ~counter~0 0)} is VALID [2022-04-28 07:41:24,767 INFO L290 TraceCheckUtils]: 1: Hoare triple {571#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {579#(<= ~counter~0 0)} is VALID [2022-04-28 07:41:24,767 INFO L272 TraceCheckUtils]: 0: Hoare triple {571#true} call ULTIMATE.init(); {571#true} is VALID [2022-04-28 07:41:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 07:41:24,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 07:41:24,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986439518] [2022-04-28 07:41:24,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 07:41:24,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083573848] [2022-04-28 07:41:24,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083573848] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-28 07:41:24,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-28 07:41:24,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-04-28 07:41:24,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 07:41:24,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1991661408] [2022-04-28 07:41:24,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1991661408] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 07:41:24,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 07:41:24,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 07:41:24,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006459833] [2022-04-28 07:41:24,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 07:41:24,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-28 07:41:24,770 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 07:41:24,770 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:41:24,782 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 20 edges. 20 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:24,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-28 07:41:24,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 07:41:24,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-28 07:41:24,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-28 07:41:24,783 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:41:24,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:24,854 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-04-28 07:41:24,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-28 07:41:24,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-28 07:41:24,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 07:41:24,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:41:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 40 transitions. [2022-04-28 07:41:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:41:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 40 transitions. [2022-04-28 07:41:24,858 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 40 transitions. [2022-04-28 07:41:24,881 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 40 edges. 40 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:24,882 INFO L225 Difference]: With dead ends: 36 [2022-04-28 07:41:24,882 INFO L226 Difference]: Without dead ends: 28 [2022-04-28 07:41:24,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-28 07:41:24,883 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 07:41:24,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 07:41:24,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-28 07:41:24,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-04-28 07:41:24,900 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 07:41:24,901 INFO L82 GeneralOperation]: Start isEquivalent. First operand 28 states. Second operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 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) [2022-04-28 07:41:24,901 INFO L74 IsIncluded]: Start isIncluded. First operand 28 states. Second operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 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) [2022-04-28 07:41:24,901 INFO L87 Difference]: Start difference. First operand 28 states. Second operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 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) [2022-04-28 07:41:24,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:24,910 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-04-28 07:41:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-04-28 07:41:24,911 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:41:24,911 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:41:24,911 INFO L74 IsIncluded]: Start isIncluded. First operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 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 28 states. [2022-04-28 07:41:24,912 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 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 28 states. [2022-04-28 07:41:24,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:24,915 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-04-28 07:41:24,915 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-04-28 07:41:24,917 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:41:24,917 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:41:24,917 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 07:41:24,917 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 07:41:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 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) [2022-04-28 07:41:24,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-04-28 07:41:24,919 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2022-04-28 07:41:24,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 07:41:24,919 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-04-28 07:41:24,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:41:24,919 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 28 states and 31 transitions. [2022-04-28 07:41:24,947 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 31 edges. 31 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:24,947 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-04-28 07:41:24,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-28 07:41:24,947 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 07:41:24,948 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 07:41:24,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-04-28 07:41:25,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 07:41:25,156 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 07:41:25,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 07:41:25,156 INFO L85 PathProgramCache]: Analyzing trace with hash -261798320, now seen corresponding path program 1 times [2022-04-28 07:41:25,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 07:41:25,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1351424123] [2022-04-28 07:41:25,266 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-28 07:41:25,267 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-28 07:41:25,267 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-28 07:41:25,267 INFO L85 PathProgramCache]: Analyzing trace with hash -261798320, now seen corresponding path program 2 times [2022-04-28 07:41:25,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 07:41:25,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483145552] [2022-04-28 07:41:25,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 07:41:25,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 07:41:25,275 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 07:41:25,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602989796] [2022-04-28 07:41:25,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 07:41:25,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 07:41:25,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 07:41:25,276 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) [2022-04-28 07:41:25,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-28 07:41:25,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-28 07:41:25,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 07:41:25,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-28 07:41:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 07:41:25,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 07:41:25,409 INFO L272 TraceCheckUtils]: 0: Hoare triple {881#true} call ULTIMATE.init(); {881#true} is VALID [2022-04-28 07:41:25,409 INFO L290 TraceCheckUtils]: 1: Hoare triple {881#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {881#true} is VALID [2022-04-28 07:41:25,409 INFO L290 TraceCheckUtils]: 2: Hoare triple {881#true} assume true; {881#true} is VALID [2022-04-28 07:41:25,409 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {881#true} {881#true} #57#return; {881#true} is VALID [2022-04-28 07:41:25,410 INFO L272 TraceCheckUtils]: 4: Hoare triple {881#true} call #t~ret6 := main(); {881#true} is VALID [2022-04-28 07:41:25,410 INFO L290 TraceCheckUtils]: 5: Hoare triple {881#true} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -32768 <= #t~nondet4 && #t~nondet4 <= 32767;~k~0 := #t~nondet4;havoc #t~nondet4;~y~0 := 0;~x~0 := 0;~c~0 := 0; {901#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-28 07:41:25,410 INFO L290 TraceCheckUtils]: 6: Hoare triple {901#(and (= main_~x~0 0) (= main_~y~0 0))} #t~post5 := ~counter~0;~counter~0 := 1 + #t~post5; {901#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-28 07:41:25,411 INFO L290 TraceCheckUtils]: 7: Hoare triple {901#(and (= main_~x~0 0) (= main_~y~0 0))} assume !!(#t~post5 < 2);havoc #t~post5; {901#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-28 07:41:25,411 INFO L272 TraceCheckUtils]: 8: Hoare triple {901#(and (= main_~x~0 0) (= main_~y~0 0))} call __VERIFIER_assert((if 0 == 4 * ~x~0 - ~y~0 * ~y~0 * ~y~0 * ~y~0 - 2 * ~y~0 * ~y~0 * ~y~0 - ~y~0 * ~y~0 then 1 else 0)); {881#true} is VALID [2022-04-28 07:41:25,411 INFO L290 TraceCheckUtils]: 9: Hoare triple {881#true} ~cond := #in~cond; {881#true} is VALID [2022-04-28 07:41:25,411 INFO L290 TraceCheckUtils]: 10: Hoare triple {881#true} assume !(0 == ~cond); {881#true} is VALID [2022-04-28 07:41:25,411 INFO L290 TraceCheckUtils]: 11: Hoare triple {881#true} assume true; {881#true} is VALID [2022-04-28 07:41:25,413 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {881#true} {901#(and (= main_~x~0 0) (= main_~y~0 0))} #51#return; {901#(and (= main_~x~0 0) (= main_~y~0 0))} is VALID [2022-04-28 07:41:25,413 INFO L290 TraceCheckUtils]: 13: Hoare triple {901#(and (= main_~x~0 0) (= main_~y~0 0))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~y~0 := 1 + ~y~0;~x~0 := ~y~0 * ~y~0 * ~y~0 + ~x~0; {926#(and (= (+ (- 1) main_~y~0) 0) (= (* main_~y~0 (* main_~y~0 main_~y~0)) main_~x~0))} is VALID [2022-04-28 07:41:25,414 INFO L290 TraceCheckUtils]: 14: Hoare triple {926#(and (= (+ (- 1) main_~y~0) 0) (= (* main_~y~0 (* main_~y~0 main_~y~0)) main_~x~0))} #t~post5 := ~counter~0;~counter~0 := 1 + #t~post5; {926#(and (= (+ (- 1) main_~y~0) 0) (= (* main_~y~0 (* main_~y~0 main_~y~0)) main_~x~0))} is VALID [2022-04-28 07:41:25,414 INFO L290 TraceCheckUtils]: 15: Hoare triple {926#(and (= (+ (- 1) main_~y~0) 0) (= (* main_~y~0 (* main_~y~0 main_~y~0)) main_~x~0))} assume !!(#t~post5 < 2);havoc #t~post5; {926#(and (= (+ (- 1) main_~y~0) 0) (= (* main_~y~0 (* main_~y~0 main_~y~0)) main_~x~0))} is VALID [2022-04-28 07:41:25,415 INFO L272 TraceCheckUtils]: 16: Hoare triple {926#(and (= (+ (- 1) main_~y~0) 0) (= (* main_~y~0 (* main_~y~0 main_~y~0)) main_~x~0))} call __VERIFIER_assert((if 0 == 4 * ~x~0 - ~y~0 * ~y~0 * ~y~0 * ~y~0 - 2 * ~y~0 * ~y~0 * ~y~0 - ~y~0 * ~y~0 then 1 else 0)); {936#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 07:41:25,415 INFO L290 TraceCheckUtils]: 17: Hoare triple {936#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {940#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 07:41:25,415 INFO L290 TraceCheckUtils]: 18: Hoare triple {940#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {882#false} is VALID [2022-04-28 07:41:25,415 INFO L290 TraceCheckUtils]: 19: Hoare triple {882#false} assume !false; {882#false} is VALID [2022-04-28 07:41:25,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 07:41:25,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-28 07:41:25,609 INFO L290 TraceCheckUtils]: 19: Hoare triple {882#false} assume !false; {882#false} is VALID [2022-04-28 07:41:25,610 INFO L290 TraceCheckUtils]: 18: Hoare triple {940#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {882#false} is VALID [2022-04-28 07:41:25,610 INFO L290 TraceCheckUtils]: 17: Hoare triple {936#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {940#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 07:41:25,611 INFO L272 TraceCheckUtils]: 16: Hoare triple {956#(= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4))} call __VERIFIER_assert((if 0 == 4 * ~x~0 - ~y~0 * ~y~0 * ~y~0 * ~y~0 - 2 * ~y~0 * ~y~0 * ~y~0 - ~y~0 * ~y~0 then 1 else 0)); {936#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 07:41:25,611 INFO L290 TraceCheckUtils]: 15: Hoare triple {956#(= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4))} assume !!(#t~post5 < 2);havoc #t~post5; {956#(= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4))} is VALID [2022-04-28 07:41:25,614 INFO L290 TraceCheckUtils]: 14: Hoare triple {956#(= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4))} #t~post5 := ~counter~0;~counter~0 := 1 + #t~post5; {956#(= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4))} is VALID [2022-04-28 07:41:25,862 INFO L290 TraceCheckUtils]: 13: Hoare triple {956#(= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~y~0 := 1 + ~y~0;~x~0 := ~y~0 * ~y~0 * ~y~0 + ~x~0; {956#(= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4))} is VALID [2022-04-28 07:41:25,863 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {881#true} {956#(= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4))} #51#return; {956#(= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4))} is VALID [2022-04-28 07:41:25,863 INFO L290 TraceCheckUtils]: 11: Hoare triple {881#true} assume true; {881#true} is VALID [2022-04-28 07:41:25,863 INFO L290 TraceCheckUtils]: 10: Hoare triple {881#true} assume !(0 == ~cond); {881#true} is VALID [2022-04-28 07:41:25,863 INFO L290 TraceCheckUtils]: 9: Hoare triple {881#true} ~cond := #in~cond; {881#true} is VALID [2022-04-28 07:41:25,863 INFO L272 TraceCheckUtils]: 8: Hoare triple {956#(= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4))} call __VERIFIER_assert((if 0 == 4 * ~x~0 - ~y~0 * ~y~0 * ~y~0 * ~y~0 - 2 * ~y~0 * ~y~0 * ~y~0 - ~y~0 * ~y~0 then 1 else 0)); {881#true} is VALID [2022-04-28 07:41:25,864 INFO L290 TraceCheckUtils]: 7: Hoare triple {956#(= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4))} assume !!(#t~post5 < 2);havoc #t~post5; {956#(= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4))} is VALID [2022-04-28 07:41:25,864 INFO L290 TraceCheckUtils]: 6: Hoare triple {956#(= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4))} #t~post5 := ~counter~0;~counter~0 := 1 + #t~post5; {956#(= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4))} is VALID [2022-04-28 07:41:25,865 INFO L290 TraceCheckUtils]: 5: Hoare triple {881#true} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -32768 <= #t~nondet4 && #t~nondet4 <= 32767;~k~0 := #t~nondet4;havoc #t~nondet4;~y~0 := 0;~x~0 := 0;~c~0 := 0; {956#(= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4))} is VALID [2022-04-28 07:41:25,865 INFO L272 TraceCheckUtils]: 4: Hoare triple {881#true} call #t~ret6 := main(); {881#true} is VALID [2022-04-28 07:41:25,865 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {881#true} {881#true} #57#return; {881#true} is VALID [2022-04-28 07:41:25,865 INFO L290 TraceCheckUtils]: 2: Hoare triple {881#true} assume true; {881#true} is VALID [2022-04-28 07:41:25,865 INFO L290 TraceCheckUtils]: 1: Hoare triple {881#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {881#true} is VALID [2022-04-28 07:41:25,865 INFO L272 TraceCheckUtils]: 0: Hoare triple {881#true} call ULTIMATE.init(); {881#true} is VALID [2022-04-28 07:41:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-04-28 07:41:25,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 07:41:25,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483145552] [2022-04-28 07:41:25,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 07:41:25,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602989796] [2022-04-28 07:41:25,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602989796] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-28 07:41:25,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-28 07:41:25,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-28 07:41:25,866 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 07:41:25,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1351424123] [2022-04-28 07:41:25,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1351424123] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 07:41:25,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 07:41:25,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 07:41:25,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34913167] [2022-04-28 07:41:25,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 07:41:25,867 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-28 07:41:25,867 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 07:41:25,867 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:41:26,325 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:26,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-28 07:41:26,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 07:41:26,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-28 07:41:26,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-28 07:41:26,326 INFO L87 Difference]: Start difference. First operand 28 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:41:26,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:26,429 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-04-28 07:41:26,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-28 07:41:26,429 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-28 07:41:26,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 07:41:26,429 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:41:26,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 26 transitions. [2022-04-28 07:41:26,431 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:41:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 26 transitions. [2022-04-28 07:41:26,431 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 26 transitions. [2022-04-28 07:41:26,893 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 26 edges. 26 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:26,894 INFO L225 Difference]: With dead ends: 34 [2022-04-28 07:41:26,894 INFO L226 Difference]: Without dead ends: 29 [2022-04-28 07:41:26,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-28 07:41:26,895 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 07:41:26,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 07:41:26,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-28 07:41:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-28 07:41:26,912 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 07:41:26,912 INFO L82 GeneralOperation]: Start isEquivalent. First operand 29 states. Second operand has 29 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:41:26,912 INFO L74 IsIncluded]: Start isIncluded. First operand 29 states. Second operand has 29 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:41:26,912 INFO L87 Difference]: Start difference. First operand 29 states. Second operand has 29 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:41:26,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:26,913 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2022-04-28 07:41:26,913 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-04-28 07:41:26,914 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:41:26,914 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:41:26,914 INFO L74 IsIncluded]: Start isIncluded. First operand has 29 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 29 states. [2022-04-28 07:41:26,914 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 29 states. [2022-04-28 07:41:26,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:26,915 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2022-04-28 07:41:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-04-28 07:41:26,915 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:41:26,915 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:41:26,915 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 07:41:26,915 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 07:41:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:41:26,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-04-28 07:41:26,916 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 20 [2022-04-28 07:41:26,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 07:41:26,916 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-04-28 07:41:26,916 INFO L496 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 07:41:26,916 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 29 states and 30 transitions. [2022-04-28 07:41:27,382 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 30 edges. 30 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:27,383 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-04-28 07:41:27,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-28 07:41:27,383 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 07:41:27,383 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 07:41:27,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-28 07:41:27,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 07:41:27,584 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 07:41:27,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 07:41:27,584 INFO L85 PathProgramCache]: Analyzing trace with hash 891414954, now seen corresponding path program 1 times [2022-04-28 07:41:27,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 07:41:27,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1856790539] [2022-04-28 07:41:27,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-28 07:41:27,677 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-28 07:41:27,677 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-28 07:41:27,677 INFO L85 PathProgramCache]: Analyzing trace with hash 891414954, now seen corresponding path program 2 times [2022-04-28 07:41:27,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 07:41:27,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700330796] [2022-04-28 07:41:27,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 07:41:27,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 07:41:27,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 07:41:27,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063596092] [2022-04-28 07:41:27,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 07:41:27,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 07:41:27,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 07:41:27,688 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) [2022-04-28 07:41:27,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-28 07:41:27,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-28 07:41:27,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 07:41:27,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-28 07:41:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 07:41:27,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 07:41:27,917 INFO L272 TraceCheckUtils]: 0: Hoare triple {1193#true} call ULTIMATE.init(); {1193#true} is VALID [2022-04-28 07:41:27,927 INFO L290 TraceCheckUtils]: 1: Hoare triple {1193#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(9, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {1193#true} is VALID [2022-04-28 07:41:27,927 INFO L290 TraceCheckUtils]: 2: Hoare triple {1193#true} assume true; {1193#true} is VALID [2022-04-28 07:41:27,927 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1193#true} {1193#true} #57#return; {1193#true} is VALID [2022-04-28 07:41:27,927 INFO L272 TraceCheckUtils]: 4: Hoare triple {1193#true} call #t~ret6 := main(); {1193#true} is VALID [2022-04-28 07:41:27,930 INFO L290 TraceCheckUtils]: 5: Hoare triple {1193#true} havoc ~k~0;havoc ~y~0;havoc ~x~0;havoc ~c~0;assume -32768 <= #t~nondet4 && #t~nondet4 <= 32767;~k~0 := #t~nondet4;havoc #t~nondet4;~y~0 := 0;~x~0 := 0;~c~0 := 0; {1213#(and (= main_~c~0 0) (= main_~y~0 0))} is VALID [2022-04-28 07:41:27,930 INFO L290 TraceCheckUtils]: 6: Hoare triple {1213#(and (= main_~c~0 0) (= main_~y~0 0))} #t~post5 := ~counter~0;~counter~0 := 1 + #t~post5; {1213#(and (= main_~c~0 0) (= main_~y~0 0))} is VALID [2022-04-28 07:41:27,931 INFO L290 TraceCheckUtils]: 7: Hoare triple {1213#(and (= main_~c~0 0) (= main_~y~0 0))} assume !!(#t~post5 < 2);havoc #t~post5; {1213#(and (= main_~c~0 0) (= main_~y~0 0))} is VALID [2022-04-28 07:41:27,931 INFO L272 TraceCheckUtils]: 8: Hoare triple {1213#(and (= main_~c~0 0) (= main_~y~0 0))} call __VERIFIER_assert((if 0 == 4 * ~x~0 - ~y~0 * ~y~0 * ~y~0 * ~y~0 - 2 * ~y~0 * ~y~0 * ~y~0 - ~y~0 * ~y~0 then 1 else 0)); {1193#true} is VALID [2022-04-28 07:41:27,931 INFO L290 TraceCheckUtils]: 9: Hoare triple {1193#true} ~cond := #in~cond; {1193#true} is VALID [2022-04-28 07:41:27,931 INFO L290 TraceCheckUtils]: 10: Hoare triple {1193#true} assume !(0 == ~cond); {1193#true} is VALID [2022-04-28 07:41:27,932 INFO L290 TraceCheckUtils]: 11: Hoare triple {1193#true} assume true; {1193#true} is VALID [2022-04-28 07:41:27,932 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {1193#true} {1213#(and (= main_~c~0 0) (= main_~y~0 0))} #51#return; {1213#(and (= main_~c~0 0) (= main_~y~0 0))} is VALID [2022-04-28 07:41:27,932 INFO L290 TraceCheckUtils]: 13: Hoare triple {1213#(and (= main_~c~0 0) (= main_~y~0 0))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~y~0 := 1 + ~y~0;~x~0 := ~y~0 * ~y~0 * ~y~0 + ~x~0; {1238#(and (= (+ (- 1) main_~y~0) 0) (< 0 main_~k~0) (<= main_~c~0 1))} is VALID [2022-04-28 07:41:27,933 INFO L290 TraceCheckUtils]: 14: Hoare triple {1238#(and (= (+ (- 1) main_~y~0) 0) (< 0 main_~k~0) (<= main_~c~0 1))} #t~post5 := ~counter~0;~counter~0 := 1 + #t~post5; {1238#(and (= (+ (- 1) main_~y~0) 0) (< 0 main_~k~0) (<= main_~c~0 1))} is VALID [2022-04-28 07:41:27,933 INFO L290 TraceCheckUtils]: 15: Hoare triple {1238#(and (= (+ (- 1) main_~y~0) 0) (< 0 main_~k~0) (<= main_~c~0 1))} assume !!(#t~post5 < 2);havoc #t~post5; {1238#(and (= (+ (- 1) main_~y~0) 0) (< 0 main_~k~0) (<= main_~c~0 1))} is VALID [2022-04-28 07:41:27,933 INFO L272 TraceCheckUtils]: 16: Hoare triple {1238#(and (= (+ (- 1) main_~y~0) 0) (< 0 main_~k~0) (<= main_~c~0 1))} call __VERIFIER_assert((if 0 == 4 * ~x~0 - ~y~0 * ~y~0 * ~y~0 * ~y~0 - 2 * ~y~0 * ~y~0 * ~y~0 - ~y~0 * ~y~0 then 1 else 0)); {1193#true} is VALID [2022-04-28 07:41:27,933 INFO L290 TraceCheckUtils]: 17: Hoare triple {1193#true} ~cond := #in~cond; {1193#true} is VALID [2022-04-28 07:41:27,934 INFO L290 TraceCheckUtils]: 18: Hoare triple {1193#true} assume !(0 == ~cond); {1193#true} is VALID [2022-04-28 07:41:27,934 INFO L290 TraceCheckUtils]: 19: Hoare triple {1193#true} assume true; {1193#true} is VALID [2022-04-28 07:41:27,934 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {1193#true} {1238#(and (= (+ (- 1) main_~y~0) 0) (< 0 main_~k~0) (<= main_~c~0 1))} #51#return; {1238#(and (= (+ (- 1) main_~y~0) 0) (< 0 main_~k~0) (<= main_~c~0 1))} is VALID [2022-04-28 07:41:27,935 INFO L290 TraceCheckUtils]: 21: Hoare triple {1238#(and (= (+ (- 1) main_~y~0) 0) (< 0 main_~k~0) (<= main_~c~0 1))} assume !(~c~0 < ~k~0); {1263#(and (= (+ (- 1) main_~y~0) 0) (<= main_~k~0 1) (< 0 main_~k~0))} is VALID [2022-04-28 07:41:27,935 INFO L272 TraceCheckUtils]: 22: Hoare triple {1263#(and (= (+ (- 1) main_~y~0) 0) (<= main_~k~0 1) (< 0 main_~k~0))} call __VERIFIER_assert((if 0 == ~k~0 * ~y~0 - ~y~0 * ~y~0 then 1 else 0)); {1267#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 07:41:27,935 INFO L290 TraceCheckUtils]: 23: Hoare triple {1267#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {1271#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 07:41:27,936 INFO L290 TraceCheckUtils]: 24: Hoare triple {1271#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {1194#false} is VALID [2022-04-28 07:41:27,936 INFO L290 TraceCheckUtils]: 25: Hoare triple {1194#false} assume !false; {1194#false} is VALID [2022-04-28 07:41:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-28 07:41:27,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-28 07:41:28,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 07:41:28,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700330796] [2022-04-28 07:41:28,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 07:41:28,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063596092] [2022-04-28 07:41:28,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063596092] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-28 07:41:28,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-28 07:41:28,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-28 07:41:28,186 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 07:41:28,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1856790539] [2022-04-28 07:41:28,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1856790539] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 07:41:28,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 07:41:28,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-28 07:41:28,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102736833] [2022-04-28 07:41:28,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 07:41:28,187 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2022-04-28 07:41:28,187 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 07:41:28,187 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:41:28,203 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 23 edges. 23 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:28,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-28 07:41:28,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 07:41:28,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-28 07:41:28,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-28 07:41:28,204 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:41:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:28,370 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-04-28 07:41:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-28 07:41:28,370 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2022-04-28 07:41:28,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 07:41:28,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:41:28,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2022-04-28 07:41:28,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:41:28,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2022-04-28 07:41:28,372 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 7 states and 34 transitions. [2022-04-28 07:41:28,397 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 34 edges. 34 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:28,397 INFO L225 Difference]: With dead ends: 36 [2022-04-28 07:41:28,397 INFO L226 Difference]: Without dead ends: 31 [2022-04-28 07:41:28,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-28 07:41:28,398 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 07:41:28,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 100 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 07:41:28,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-28 07:41:28,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-28 07:41:28,417 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 07:41:28,417 INFO L82 GeneralOperation]: Start isEquivalent. First operand 31 states. Second operand has 31 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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) [2022-04-28 07:41:28,417 INFO L74 IsIncluded]: Start isIncluded. First operand 31 states. Second operand has 31 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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) [2022-04-28 07:41:28,417 INFO L87 Difference]: Start difference. First operand 31 states. Second operand has 31 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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) [2022-04-28 07:41:28,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:28,418 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-04-28 07:41:28,418 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-04-28 07:41:28,418 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:41:28,418 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:41:28,418 INFO L74 IsIncluded]: Start isIncluded. First operand has 31 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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 31 states. [2022-04-28 07:41:28,419 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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 31 states. [2022-04-28 07:41:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 07:41:28,419 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-04-28 07:41:28,419 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-04-28 07:41:28,420 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 07:41:28,420 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 07:41:28,420 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 07:41:28,420 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 07:41:28,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 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) [2022-04-28 07:41:28,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-04-28 07:41:28,421 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2022-04-28 07:41:28,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 07:41:28,421 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-04-28 07:41:28,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 07:41:28,421 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 31 states and 33 transitions. [2022-04-28 07:41:28,919 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 33 edges. 33 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 07:41:28,919 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-04-28 07:41:28,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-28 07:41:28,920 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 07:41:28,920 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 07:41:28,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-28 07:41:29,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 07:41:29,120 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 07:41:29,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 07:41:29,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1647059121, now seen corresponding path program 3 times [2022-04-28 07:41:29,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 07:41:29,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [986204409] [2022-04-28 07:41:29,206 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-28 07:41:29,207 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-28 07:41:29,207 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-28 07:41:29,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1647059121, now seen corresponding path program 4 times [2022-04-28 07:41:29,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 07:41:29,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304594365] [2022-04-28 07:41:29,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 07:41:29,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 07:41:29,225 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 07:41:29,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061471783] [2022-04-28 07:41:29,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-28 07:41:29,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 07:41:29,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 07:41:29,227 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-28 07:41:29,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-28 07:41:29,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-28 07:41:29,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-04-28 07:41:29,281 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-04-28 07:41:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-04-28 07:41:29,302 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-04-28 07:41:29,302 INFO L130 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found a feasible trace [2022-04-28 07:41:29,302 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-04-28 07:41:29,304 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-28 07:41:29,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-28 07:41:29,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 07:41:29,508 INFO L356 BasicCegarLoop]: Path program histogram: [4, 2, 2, 2, 2, 2] [2022-04-28 07:41:29,510 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-04-28 07:41:29,518 WARN L170 areAnnotationChecker]: reach_errorENTRY has no Hoare annotation [2022-04-28 07:41:29,518 WARN L170 areAnnotationChecker]: ULTIMATE.initENTRY has no Hoare annotation [2022-04-28 07:41:29,518 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2022-04-28 07:41:29,518 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: assume_abort_if_notENTRY has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: __VERIFIER_assertENTRY has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: reach_errorFINAL has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L7 has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L7 has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L27-3 has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L27-3 has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L10 has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L10 has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L7-2 has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L27-4 has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L27-4 has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L27-1 has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L27-1 has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L11 has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L11 has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L10-2 has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L37 has no Hoare annotation [2022-04-28 07:41:29,519 WARN L170 areAnnotationChecker]: L37 has no Hoare annotation [2022-04-28 07:41:29,520 WARN L170 areAnnotationChecker]: L28 has no Hoare annotation [2022-04-28 07:41:29,520 WARN L170 areAnnotationChecker]: L28 has no Hoare annotation [2022-04-28 07:41:29,520 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2022-04-28 07:41:29,520 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2022-04-28 07:41:29,520 WARN L170 areAnnotationChecker]: __VERIFIER_assertEXIT has no Hoare annotation [2022-04-28 07:41:29,520 WARN L170 areAnnotationChecker]: L38 has no Hoare annotation [2022-04-28 07:41:29,520 WARN L170 areAnnotationChecker]: L28-1 has no Hoare annotation [2022-04-28 07:41:29,520 WARN L170 areAnnotationChecker]: L28-1 has no Hoare annotation [2022-04-28 07:41:29,520 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2022-04-28 07:41:29,520 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2022-04-28 07:41:29,520 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. [2022-04-28 07:41:29,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.04 07:41:29 BoogieIcfgContainer [2022-04-28 07:41:29,522 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-28 07:41:29,522 INFO L158 Benchmark]: Toolchain (without parser) took 7361.17ms. Allocated memory was 174.1MB in the beginning and 216.0MB in the end (delta: 41.9MB). Free memory was 118.1MB in the beginning and 127.2MB in the end (delta: -9.2MB). Peak memory consumption was 33.1MB. Max. memory is 8.0GB. [2022-04-28 07:41:29,523 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 174.1MB. Free memory is still 134.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-28 07:41:29,523 INFO L158 Benchmark]: CACSL2BoogieTranslator took 179.83ms. Allocated memory is still 174.1MB. Free memory was 117.9MB in the beginning and 145.0MB in the end (delta: -27.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-28 07:41:29,523 INFO L158 Benchmark]: Boogie Preprocessor took 36.70ms. Allocated memory is still 174.1MB. Free memory was 145.0MB in the beginning and 143.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-28 07:41:29,523 INFO L158 Benchmark]: RCFGBuilder took 206.15ms. Allocated memory is still 174.1MB. Free memory was 143.5MB in the beginning and 132.4MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-28 07:41:29,523 INFO L158 Benchmark]: TraceAbstraction took 6934.15ms. Allocated memory was 174.1MB in the beginning and 216.0MB in the end (delta: 41.9MB). Free memory was 132.0MB in the beginning and 127.2MB in the end (delta: 4.7MB). Peak memory consumption was 48.1MB. Max. memory is 8.0GB. [2022-04-28 07:41:29,524 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 174.1MB. Free memory is still 134.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 179.83ms. Allocated memory is still 174.1MB. Free memory was 117.9MB in the beginning and 145.0MB in the end (delta: -27.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.70ms. Allocated memory is still 174.1MB. Free memory was 145.0MB in the beginning and 143.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 206.15ms. Allocated memory is still 174.1MB. Free memory was 143.5MB in the beginning and 132.4MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 6934.15ms. Allocated memory was 174.1MB in the beginning and 216.0MB in the end (delta: 41.9MB). Free memory was 132.0MB in the beginning and 127.2MB in the end (delta: 4.7MB). Peak memory consumption was 48.1MB. 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: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 [L27] EXPR counter++ [L27] COND TRUE counter++<2 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x [L27] EXPR counter++ [L27] COND TRUE counter++<2 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) [L10] COND FALSE !(!(cond)) [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x [L27] EXPR counter++ [L27] COND FALSE !(counter++<2) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) [L10] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.9s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 26 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 363 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 241 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 125 IncrementalHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 122 mSDtfsCounter, 125 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 148 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=6, InterpolantAutomatonStates: 30, 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, 6 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 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! [2022-04-28 07:41:29,544 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...