/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-fb4f59a-m [2022-04-28 12:45:55,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-28 12:45:55,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-28 12:45:55,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-28 12:45:55,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-28 12:45:55,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-28 12:45:55,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-28 12:45:55,581 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-28 12:45:55,583 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-28 12:45:55,589 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-28 12:45:55,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-28 12:45:55,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-28 12:45:55,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-28 12:45:55,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-28 12:45:55,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-28 12:45:55,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-28 12:45:55,593 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-28 12:45:55,594 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-28 12:45:55,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-28 12:45:55,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-28 12:45:55,597 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-28 12:45:55,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-28 12:45:55,603 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-28 12:45:55,605 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-28 12:45:55,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-28 12:45:55,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-28 12:45:55,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-28 12:45:55,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-28 12:45:55,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-28 12:45:55,625 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-28 12:45:55,637 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-28 12:45:55,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-28 12:45:55,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-28 12:45:55,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-28 12:45:55,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-28 12:45:55,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-28 12:45:55,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-28 12:45:55,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-28 12:45:55,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-28 12:45:55,639 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-28 12:45:55,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-28 12:45:55,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-28 12:45:55,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-28 12:45:55,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-28 12:45:55,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-28 12:45:55,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-28 12:45:55,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-28 12:45:55,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-28 12:45:55,641 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-28 12:45:55,641 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-28 12:45:55,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-28 12:45:55,641 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-28 12:45:55,641 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-28 12:45:55,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-28 12:45:55,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-28 12:45:55,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-28 12:45:55,838 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-28 12:45:55,838 INFO L275 PluginConnector]: CDTParser initialized [2022-04-28 12:45:55,839 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound2.c [2022-04-28 12:45:55,893 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4203a83a/573afadf81f6452bb043c22f76838cc9/FLAG21dcb3e2e [2022-04-28 12:45:56,245 INFO L306 CDTParser]: Found 1 translation units. [2022-04-28 12:45:56,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound2.c [2022-04-28 12:45:56,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4203a83a/573afadf81f6452bb043c22f76838cc9/FLAG21dcb3e2e [2022-04-28 12:45:56,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4203a83a/573afadf81f6452bb043c22f76838cc9 [2022-04-28 12:45:56,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-28 12:45:56,264 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-28 12:45:56,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-28 12:45:56,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-28 12:45:56,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-28 12:45:56,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.04 12:45:56" (1/1) ... [2022-04-28 12:45:56,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ccea386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 12:45:56, skipping insertion in model container [2022-04-28 12:45:56,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.04 12:45:56" (1/1) ... [2022-04-28 12:45:56,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-28 12:45:56,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-28 12:45:56,407 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/geo2-ll_unwindbound2.c[525,538] [2022-04-28 12:45:56,426 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-28 12:45:56,435 INFO L203 MainTranslator]: Completed pre-run [2022-04-28 12:45:56,444 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound2.c[525,538] [2022-04-28 12:45:56,448 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-28 12:45:56,458 INFO L208 MainTranslator]: Completed translation [2022-04-28 12:45:56,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 12:45:56 WrapperNode [2022-04-28 12:45:56,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-28 12:45:56,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-28 12:45:56,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-28 12:45:56,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-28 12:45:56,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 12:45:56" (1/1) ... [2022-04-28 12:45:56,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 12:45:56" (1/1) ... [2022-04-28 12:45:56,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 12:45:56" (1/1) ... [2022-04-28 12:45:56,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 12:45:56" (1/1) ... [2022-04-28 12:45:56,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 12:45:56" (1/1) ... [2022-04-28 12:45:56,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 12:45:56" (1/1) ... [2022-04-28 12:45:56,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 12:45:56" (1/1) ... [2022-04-28 12:45:56,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-28 12:45:56,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-28 12:45:56,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-28 12:45:56,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-28 12:45:56,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 12:45:56" (1/1) ... [2022-04-28 12:45:56,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-28 12:45:56,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 12:45:56,535 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 12:45:56,546 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 12:45:56,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-28 12:45:56,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-28 12:45:56,568 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-28 12:45:56,568 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-28 12:45:56,568 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-28 12:45:56,568 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-28 12:45:56,568 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-28 12:45:56,569 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-28 12:45:56,569 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-28 12:45:56,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-28 12:45:56,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-28 12:45:56,570 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-28 12:45:56,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-28 12:45:56,570 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-28 12:45:56,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-28 12:45:56,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-28 12:45:56,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-28 12:45:56,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-28 12:45:56,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-28 12:45:56,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-28 12:45:56,620 INFO L234 CfgBuilder]: Building ICFG [2022-04-28 12:45:56,622 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-28 12:45:56,743 INFO L275 CfgBuilder]: Performing block encoding [2022-04-28 12:45:56,749 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-28 12:45:56,749 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-28 12:45:56,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 12:45:56 BoogieIcfgContainer [2022-04-28 12:45:56,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-28 12:45:56,752 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-28 12:45:56,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-28 12:45:56,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-28 12:45:56,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.04 12:45:56" (1/3) ... [2022-04-28 12:45:56,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c7a5683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 12:45:56, skipping insertion in model container [2022-04-28 12:45:56,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.04 12:45:56" (2/3) ... [2022-04-28 12:45:56,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c7a5683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.04 12:45:56, skipping insertion in model container [2022-04-28 12:45:56,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.04 12:45:56" (3/3) ... [2022-04-28 12:45:56,756 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound2.c [2022-04-28 12:45:56,766 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-28 12:45:56,766 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-28 12:45:56,799 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-28 12:45:56,804 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@2c6a1eb8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@52406492 [2022-04-28 12:45:56,804 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-28 12:45:56,811 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 12:45:56,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-28 12:45:56,816 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 12:45:56,817 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 12:45:56,817 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 12:45:56,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 12:45:56,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2022-04-28 12:45:56,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 12:45:56,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [164158132] [2022-04-28 12:45:56,837 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 12:45:56,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 2 times [2022-04-28 12:45:56,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 12:45:56,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095274542] [2022-04-28 12:45:56,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 12:45:56,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 12:45:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 12:45:56,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-28 12:45:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 12:45:57,005 INFO L290 TraceCheckUtils]: 0: Hoare triple {30#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {25#true} is VALID [2022-04-28 12:45:57,006 INFO L290 TraceCheckUtils]: 1: Hoare triple {25#true} assume true; {25#true} is VALID [2022-04-28 12:45:57,006 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {25#true} {25#true} #54#return; {25#true} is VALID [2022-04-28 12:45:57,008 INFO L272 TraceCheckUtils]: 0: Hoare triple {25#true} call ULTIMATE.init(); {30#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-28 12:45:57,008 INFO L290 TraceCheckUtils]: 1: Hoare triple {30#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {25#true} is VALID [2022-04-28 12:45:57,008 INFO L290 TraceCheckUtils]: 2: Hoare triple {25#true} assume true; {25#true} is VALID [2022-04-28 12:45:57,009 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {25#true} {25#true} #54#return; {25#true} is VALID [2022-04-28 12:45:57,009 INFO L272 TraceCheckUtils]: 4: Hoare triple {25#true} call #t~ret7 := main(); {25#true} is VALID [2022-04-28 12:45:57,009 INFO L290 TraceCheckUtils]: 5: Hoare triple {25#true} havoc ~z~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~k~0 := #t~nondet5;havoc #t~nondet5;~x~0 := 1;~y~0 := 1;~c~0 := 1; {25#true} is VALID [2022-04-28 12:45:57,010 INFO L290 TraceCheckUtils]: 6: Hoare triple {25#true} assume !true; {26#false} is VALID [2022-04-28 12:45:57,010 INFO L272 TraceCheckUtils]: 7: Hoare triple {26#false} call __VERIFIER_assert((if 0 == 1 + ~x~0 * ~z~0 - ~x~0 - ~z~0 * ~y~0 then 1 else 0)); {26#false} is VALID [2022-04-28 12:45:57,010 INFO L290 TraceCheckUtils]: 8: Hoare triple {26#false} ~cond := #in~cond; {26#false} is VALID [2022-04-28 12:45:57,010 INFO L290 TraceCheckUtils]: 9: Hoare triple {26#false} assume 0 == ~cond; {26#false} is VALID [2022-04-28 12:45:57,011 INFO L290 TraceCheckUtils]: 10: Hoare triple {26#false} assume !false; {26#false} is VALID [2022-04-28 12:45:57,011 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 12:45:57,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 12:45:57,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095274542] [2022-04-28 12:45:57,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095274542] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 12:45:57,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 12:45:57,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-28 12:45:57,014 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 12:45:57,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [164158132] [2022-04-28 12:45:57,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [164158132] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 12:45:57,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 12:45:57,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-28 12:45:57,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591711468] [2022-04-28 12:45:57,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 12:45:57,020 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 12:45:57,021 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 12:45:57,024 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 12:45:57,039 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 12:45:57,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-28 12:45:57,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 12:45:57,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-28 12:45:57,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-28 12:45:57,070 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 12:45:57,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:45:57,207 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-04-28 12:45:57,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-28 12:45:57,207 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 12:45:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 12:45:57,209 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 12:45:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2022-04-28 12:45:57,220 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 12:45:57,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2022-04-28 12:45:57,223 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 50 transitions. [2022-04-28 12:45:57,294 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 50 edges. 50 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 12:45:57,301 INFO L225 Difference]: With dead ends: 39 [2022-04-28 12:45:57,301 INFO L226 Difference]: Without dead ends: 18 [2022-04-28 12:45:57,303 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 12:45:57,306 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 12:45:57,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 12:45:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-04-28 12:45:57,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-04-28 12:45:57,353 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 12:45:57,354 INFO L82 GeneralOperation]: Start isEquivalent. First operand 18 states. Second operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 12:45:57,354 INFO L74 IsIncluded]: Start isIncluded. First operand 18 states. Second operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 12:45:57,355 INFO L87 Difference]: Start difference. First operand 18 states. Second operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 12:45:57,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:45:57,358 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-04-28 12:45:57,358 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-04-28 12:45:57,358 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 12:45:57,358 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 12:45:57,358 INFO L74 IsIncluded]: Start isIncluded. First operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 18 states. [2022-04-28 12:45:57,359 INFO L87 Difference]: Start difference. First operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 18 states. [2022-04-28 12:45:57,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:45:57,361 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-04-28 12:45:57,361 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-04-28 12:45:57,361 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 12:45:57,361 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 12:45:57,361 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 12:45:57,362 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 12:45:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 12:45:57,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-28 12:45:57,364 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-04-28 12:45:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 12:45:57,365 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-28 12:45:57,365 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 12:45:57,365 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 17 states and 19 transitions. [2022-04-28 12:45:57,388 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 19 edges. 19 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 12:45:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-28 12:45:57,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-28 12:45:57,389 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 12:45:57,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 12:45:57,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-28 12:45:57,389 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 12:45:57,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 12:45:57,390 INFO L85 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2022-04-28 12:45:57,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 12:45:57,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1669896019] [2022-04-28 12:45:57,392 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 12:45:57,392 INFO L85 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 2 times [2022-04-28 12:45:57,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 12:45:57,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798978748] [2022-04-28 12:45:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 12:45:57,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 12:45:57,408 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 12:45:57,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700474234] [2022-04-28 12:45:57,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 12:45:57,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 12:45:57,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 12:45:57,418 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 12:45:57,418 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 12:45:57,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-28 12:45:57,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 12:45:57,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-28 12:45:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 12:45:57,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 12:45:57,618 INFO L272 TraceCheckUtils]: 0: Hoare triple {181#true} call ULTIMATE.init(); {181#true} is VALID [2022-04-28 12:45:57,619 INFO L290 TraceCheckUtils]: 1: Hoare triple {181#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {189#(<= ~counter~0 0)} is VALID [2022-04-28 12:45:57,619 INFO L290 TraceCheckUtils]: 2: Hoare triple {189#(<= ~counter~0 0)} assume true; {189#(<= ~counter~0 0)} is VALID [2022-04-28 12:45:57,620 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {189#(<= ~counter~0 0)} {181#true} #54#return; {189#(<= ~counter~0 0)} is VALID [2022-04-28 12:45:57,620 INFO L272 TraceCheckUtils]: 4: Hoare triple {189#(<= ~counter~0 0)} call #t~ret7 := main(); {189#(<= ~counter~0 0)} is VALID [2022-04-28 12:45:57,623 INFO L290 TraceCheckUtils]: 5: Hoare triple {189#(<= ~counter~0 0)} havoc ~z~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~k~0 := #t~nondet5;havoc #t~nondet5;~x~0 := 1;~y~0 := 1;~c~0 := 1; {189#(<= ~counter~0 0)} is VALID [2022-04-28 12:45:57,623 INFO L290 TraceCheckUtils]: 6: Hoare triple {189#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {205#(<= |main_#t~post6| 0)} is VALID [2022-04-28 12:45:57,624 INFO L290 TraceCheckUtils]: 7: Hoare triple {205#(<= |main_#t~post6| 0)} assume !(#t~post6 < 2);havoc #t~post6; {182#false} is VALID [2022-04-28 12:45:57,624 INFO L272 TraceCheckUtils]: 8: Hoare triple {182#false} call __VERIFIER_assert((if 0 == 1 + ~x~0 * ~z~0 - ~x~0 - ~z~0 * ~y~0 then 1 else 0)); {182#false} is VALID [2022-04-28 12:45:57,624 INFO L290 TraceCheckUtils]: 9: Hoare triple {182#false} ~cond := #in~cond; {182#false} is VALID [2022-04-28 12:45:57,624 INFO L290 TraceCheckUtils]: 10: Hoare triple {182#false} assume 0 == ~cond; {182#false} is VALID [2022-04-28 12:45:57,624 INFO L290 TraceCheckUtils]: 11: Hoare triple {182#false} assume !false; {182#false} is VALID [2022-04-28 12:45:57,625 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 12:45:57,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 12:45:57,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 12:45:57,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798978748] [2022-04-28 12:45:57,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 12:45:57,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700474234] [2022-04-28 12:45:57,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700474234] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 12:45:57,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 12:45:57,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-28 12:45:57,627 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 12:45:57,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1669896019] [2022-04-28 12:45:57,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1669896019] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 12:45:57,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 12:45:57,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-28 12:45:57,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487772043] [2022-04-28 12:45:57,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 12:45:57,628 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 12:45:57,628 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 12:45:57,629 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 12:45:57,639 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 12:45:57,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-28 12:45:57,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 12:45:57,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-28 12:45:57,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-28 12:45:57,640 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 12:45:57,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:45:57,699 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-04-28 12:45:57,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-28 12:45:57,699 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 12:45:57,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 12:45:57,699 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 12:45:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2022-04-28 12:45:57,701 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 12:45:57,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2022-04-28 12:45:57,703 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 28 transitions. [2022-04-28 12:45:57,726 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 12:45:57,727 INFO L225 Difference]: With dead ends: 26 [2022-04-28 12:45:57,727 INFO L226 Difference]: Without dead ends: 19 [2022-04-28 12:45:57,728 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 12:45:57,729 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 12:45:57,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 12:45:57,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-28 12:45:57,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-28 12:45:57,741 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 12:45:57,741 INFO L82 GeneralOperation]: Start isEquivalent. First operand 19 states. Second operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 12:45:57,741 INFO L74 IsIncluded]: Start isIncluded. First operand 19 states. Second operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 12:45:57,741 INFO L87 Difference]: Start difference. First operand 19 states. Second operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 12:45:57,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:45:57,743 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-28 12:45:57,743 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-28 12:45:57,743 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 12:45:57,744 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 12:45:57,744 INFO L74 IsIncluded]: Start isIncluded. First operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 19 states. [2022-04-28 12:45:57,744 INFO L87 Difference]: Start difference. First operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand 19 states. [2022-04-28 12:45:57,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:45:57,746 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2022-04-28 12:45:57,746 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-28 12:45:57,746 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 12:45:57,746 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 12:45:57,746 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 12:45:57,746 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 12:45:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 12:45:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-28 12:45:57,748 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-04-28 12:45:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 12:45:57,748 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-28 12:45:57,748 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 12:45:57,748 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 19 states and 21 transitions. [2022-04-28 12:45:57,768 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 12:45:57,769 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-28 12:45:57,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-28 12:45:57,769 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 12:45:57,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 12:45:57,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-28 12:45:57,983 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 12:45:57,984 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 12:45:57,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 12:45:57,984 INFO L85 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2022-04-28 12:45:57,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 12:45:57,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2048809263] [2022-04-28 12:45:57,985 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-28 12:45:57,985 INFO L85 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 2 times [2022-04-28 12:45:57,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 12:45:57,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798397167] [2022-04-28 12:45:57,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 12:45:57,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 12:45:57,999 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 12:45:57,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145922796] [2022-04-28 12:45:57,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 12:45:57,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 12:45:57,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 12:45:58,001 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 12:45:58,007 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 12:45:58,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-28 12:45:58,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 12:45:58,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-28 12:45:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 12:45:58,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 12:45:58,161 INFO L272 TraceCheckUtils]: 0: Hoare triple {348#true} call ULTIMATE.init(); {348#true} is VALID [2022-04-28 12:45:58,162 INFO L290 TraceCheckUtils]: 1: Hoare triple {348#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {348#true} is VALID [2022-04-28 12:45:58,162 INFO L290 TraceCheckUtils]: 2: Hoare triple {348#true} assume true; {348#true} is VALID [2022-04-28 12:45:58,162 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {348#true} {348#true} #54#return; {348#true} is VALID [2022-04-28 12:45:58,162 INFO L272 TraceCheckUtils]: 4: Hoare triple {348#true} call #t~ret7 := main(); {348#true} is VALID [2022-04-28 12:45:58,163 INFO L290 TraceCheckUtils]: 5: Hoare triple {348#true} havoc ~z~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~k~0 := #t~nondet5;havoc #t~nondet5;~x~0 := 1;~y~0 := 1;~c~0 := 1; {368#(and (= main_~y~0 1) (= main_~x~0 1))} is VALID [2022-04-28 12:45:58,163 INFO L290 TraceCheckUtils]: 6: Hoare triple {368#(and (= main_~y~0 1) (= main_~x~0 1))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {368#(and (= main_~y~0 1) (= main_~x~0 1))} is VALID [2022-04-28 12:45:58,164 INFO L290 TraceCheckUtils]: 7: Hoare triple {368#(and (= main_~y~0 1) (= main_~x~0 1))} assume !!(#t~post6 < 2);havoc #t~post6; {368#(and (= main_~y~0 1) (= main_~x~0 1))} is VALID [2022-04-28 12:45:58,165 INFO L272 TraceCheckUtils]: 8: Hoare triple {368#(and (= main_~y~0 1) (= main_~x~0 1))} call __VERIFIER_assert((if 0 == 1 + ~x~0 * ~z~0 - ~x~0 - ~z~0 * ~y~0 then 1 else 0)); {378#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 12:45:58,165 INFO L290 TraceCheckUtils]: 9: Hoare triple {378#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {382#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 12:45:58,166 INFO L290 TraceCheckUtils]: 10: Hoare triple {382#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {349#false} is VALID [2022-04-28 12:45:58,166 INFO L290 TraceCheckUtils]: 11: Hoare triple {349#false} assume !false; {349#false} is VALID [2022-04-28 12:45:58,166 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 12:45:58,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-28 12:45:58,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 12:45:58,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798397167] [2022-04-28 12:45:58,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 12:45:58,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145922796] [2022-04-28 12:45:58,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145922796] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 12:45:58,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 12:45:58,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 12:45:58,168 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 12:45:58,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2048809263] [2022-04-28 12:45:58,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2048809263] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 12:45:58,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 12:45:58,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 12:45:58,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16478327] [2022-04-28 12:45:58,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 12:45:58,169 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 12:45:58,169 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 12:45:58,169 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 12:45:58,180 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 12:45:58,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-28 12:45:58,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 12:45:58,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-28 12:45:58,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-28 12:45:58,181 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-28 12:45:58,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:45:58,286 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-04-28 12:45:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-28 12:45:58,286 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 12:45:58,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 12:45:58,286 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 12:45:58,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 31 transitions. [2022-04-28 12:45:58,292 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 12:45:58,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 31 transitions. [2022-04-28 12:45:58,296 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 31 transitions. [2022-04-28 12:45:58,327 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 12:45:58,328 INFO L225 Difference]: With dead ends: 28 [2022-04-28 12:45:58,328 INFO L226 Difference]: Without dead ends: 25 [2022-04-28 12:45:58,329 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 12:45:58,340 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 12:45:58,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 12:45:58,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-28 12:45:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-04-28 12:45:58,361 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 12:45:58,361 INFO L82 GeneralOperation]: Start isEquivalent. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 12:45:58,363 INFO L74 IsIncluded]: Start isIncluded. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 12:45:58,363 INFO L87 Difference]: Start difference. First operand 25 states. Second operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 12:45:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:45:58,364 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-04-28 12:45:58,365 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-28 12:45:58,365 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 12:45:58,365 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 12:45:58,365 INFO L74 IsIncluded]: Start isIncluded. First operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 25 states. [2022-04-28 12:45:58,365 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 25 states. [2022-04-28 12:45:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:45:58,367 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-04-28 12:45:58,367 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-28 12:45:58,367 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 12:45:58,367 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 12:45:58,367 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 12:45:58,367 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 12:45:58,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 12:45:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-04-28 12:45:58,369 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2022-04-28 12:45:58,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 12:45:58,369 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-04-28 12:45:58,369 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 12:45:58,369 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 25 states and 27 transitions. [2022-04-28 12:45:58,397 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 27 edges. 27 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 12:45:58,397 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-28 12:45:58,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-28 12:45:58,399 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 12:45:58,399 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 12:45:58,430 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 12:45:58,623 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 12:45:58,624 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 12:45:58,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 12:45:58,624 INFO L85 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2022-04-28 12:45:58,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 12:45:58,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [983005224] [2022-04-28 12:46:09,770 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-28 12:46:09,770 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-28 12:46:09,770 INFO L85 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 2 times [2022-04-28 12:46:09,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 12:46:09,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067401737] [2022-04-28 12:46:09,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 12:46:09,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 12:46:09,787 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 12:46:09,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278911990] [2022-04-28 12:46:09,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 12:46:09,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 12:46:09,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 12:46:09,802 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 12:46:09,814 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 12:46:09,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-28 12:46:09,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 12:46:09,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-28 12:46:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 12:46:09,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 12:46:09,986 INFO L272 TraceCheckUtils]: 0: Hoare triple {546#true} call ULTIMATE.init(); {546#true} is VALID [2022-04-28 12:46:09,987 INFO L290 TraceCheckUtils]: 1: Hoare triple {546#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {554#(<= ~counter~0 0)} is VALID [2022-04-28 12:46:09,987 INFO L290 TraceCheckUtils]: 2: Hoare triple {554#(<= ~counter~0 0)} assume true; {554#(<= ~counter~0 0)} is VALID [2022-04-28 12:46:09,988 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {554#(<= ~counter~0 0)} {546#true} #54#return; {554#(<= ~counter~0 0)} is VALID [2022-04-28 12:46:09,988 INFO L272 TraceCheckUtils]: 4: Hoare triple {554#(<= ~counter~0 0)} call #t~ret7 := main(); {554#(<= ~counter~0 0)} is VALID [2022-04-28 12:46:09,989 INFO L290 TraceCheckUtils]: 5: Hoare triple {554#(<= ~counter~0 0)} havoc ~z~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~k~0 := #t~nondet5;havoc #t~nondet5;~x~0 := 1;~y~0 := 1;~c~0 := 1; {554#(<= ~counter~0 0)} is VALID [2022-04-28 12:46:09,990 INFO L290 TraceCheckUtils]: 6: Hoare triple {554#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {570#(<= ~counter~0 1)} is VALID [2022-04-28 12:46:09,991 INFO L290 TraceCheckUtils]: 7: Hoare triple {570#(<= ~counter~0 1)} assume !!(#t~post6 < 2);havoc #t~post6; {570#(<= ~counter~0 1)} is VALID [2022-04-28 12:46:09,992 INFO L272 TraceCheckUtils]: 8: Hoare triple {570#(<= ~counter~0 1)} call __VERIFIER_assert((if 0 == 1 + ~x~0 * ~z~0 - ~x~0 - ~z~0 * ~y~0 then 1 else 0)); {570#(<= ~counter~0 1)} is VALID [2022-04-28 12:46:09,995 INFO L290 TraceCheckUtils]: 9: Hoare triple {570#(<= ~counter~0 1)} ~cond := #in~cond; {570#(<= ~counter~0 1)} is VALID [2022-04-28 12:46:09,996 INFO L290 TraceCheckUtils]: 10: Hoare triple {570#(<= ~counter~0 1)} assume !(0 == ~cond); {570#(<= ~counter~0 1)} is VALID [2022-04-28 12:46:10,000 INFO L290 TraceCheckUtils]: 11: Hoare triple {570#(<= ~counter~0 1)} assume true; {570#(<= ~counter~0 1)} is VALID [2022-04-28 12:46:10,001 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {570#(<= ~counter~0 1)} {570#(<= ~counter~0 1)} #50#return; {570#(<= ~counter~0 1)} is VALID [2022-04-28 12:46:10,001 INFO L290 TraceCheckUtils]: 13: Hoare triple {570#(<= ~counter~0 1)} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := 1 + ~x~0 * ~z~0;~y~0 := ~y~0 * ~z~0; {570#(<= ~counter~0 1)} is VALID [2022-04-28 12:46:10,002 INFO L290 TraceCheckUtils]: 14: Hoare triple {570#(<= ~counter~0 1)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {595#(<= |main_#t~post6| 1)} is VALID [2022-04-28 12:46:10,002 INFO L290 TraceCheckUtils]: 15: Hoare triple {595#(<= |main_#t~post6| 1)} assume !(#t~post6 < 2);havoc #t~post6; {547#false} is VALID [2022-04-28 12:46:10,002 INFO L272 TraceCheckUtils]: 16: Hoare triple {547#false} call __VERIFIER_assert((if 0 == 1 + ~x~0 * ~z~0 - ~x~0 - ~z~0 * ~y~0 then 1 else 0)); {547#false} is VALID [2022-04-28 12:46:10,003 INFO L290 TraceCheckUtils]: 17: Hoare triple {547#false} ~cond := #in~cond; {547#false} is VALID [2022-04-28 12:46:10,003 INFO L290 TraceCheckUtils]: 18: Hoare triple {547#false} assume 0 == ~cond; {547#false} is VALID [2022-04-28 12:46:10,003 INFO L290 TraceCheckUtils]: 19: Hoare triple {547#false} assume !false; {547#false} is VALID [2022-04-28 12:46:10,003 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 12:46:10,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-28 12:46:10,147 INFO L290 TraceCheckUtils]: 19: Hoare triple {547#false} assume !false; {547#false} is VALID [2022-04-28 12:46:10,148 INFO L290 TraceCheckUtils]: 18: Hoare triple {547#false} assume 0 == ~cond; {547#false} is VALID [2022-04-28 12:46:10,148 INFO L290 TraceCheckUtils]: 17: Hoare triple {547#false} ~cond := #in~cond; {547#false} is VALID [2022-04-28 12:46:10,148 INFO L272 TraceCheckUtils]: 16: Hoare triple {547#false} call __VERIFIER_assert((if 0 == 1 + ~x~0 * ~z~0 - ~x~0 - ~z~0 * ~y~0 then 1 else 0)); {547#false} is VALID [2022-04-28 12:46:10,149 INFO L290 TraceCheckUtils]: 15: Hoare triple {595#(<= |main_#t~post6| 1)} assume !(#t~post6 < 2);havoc #t~post6; {547#false} is VALID [2022-04-28 12:46:10,149 INFO L290 TraceCheckUtils]: 14: Hoare triple {570#(<= ~counter~0 1)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {595#(<= |main_#t~post6| 1)} is VALID [2022-04-28 12:46:10,150 INFO L290 TraceCheckUtils]: 13: Hoare triple {570#(<= ~counter~0 1)} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := 1 + ~x~0 * ~z~0;~y~0 := ~y~0 * ~z~0; {570#(<= ~counter~0 1)} is VALID [2022-04-28 12:46:10,151 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {546#true} {570#(<= ~counter~0 1)} #50#return; {570#(<= ~counter~0 1)} is VALID [2022-04-28 12:46:10,151 INFO L290 TraceCheckUtils]: 11: Hoare triple {546#true} assume true; {546#true} is VALID [2022-04-28 12:46:10,151 INFO L290 TraceCheckUtils]: 10: Hoare triple {546#true} assume !(0 == ~cond); {546#true} is VALID [2022-04-28 12:46:10,152 INFO L290 TraceCheckUtils]: 9: Hoare triple {546#true} ~cond := #in~cond; {546#true} is VALID [2022-04-28 12:46:10,152 INFO L272 TraceCheckUtils]: 8: Hoare triple {570#(<= ~counter~0 1)} call __VERIFIER_assert((if 0 == 1 + ~x~0 * ~z~0 - ~x~0 - ~z~0 * ~y~0 then 1 else 0)); {546#true} is VALID [2022-04-28 12:46:10,153 INFO L290 TraceCheckUtils]: 7: Hoare triple {570#(<= ~counter~0 1)} assume !!(#t~post6 < 2);havoc #t~post6; {570#(<= ~counter~0 1)} is VALID [2022-04-28 12:46:10,153 INFO L290 TraceCheckUtils]: 6: Hoare triple {554#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {570#(<= ~counter~0 1)} is VALID [2022-04-28 12:46:10,155 INFO L290 TraceCheckUtils]: 5: Hoare triple {554#(<= ~counter~0 0)} havoc ~z~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~k~0 := #t~nondet5;havoc #t~nondet5;~x~0 := 1;~y~0 := 1;~c~0 := 1; {554#(<= ~counter~0 0)} is VALID [2022-04-28 12:46:10,155 INFO L272 TraceCheckUtils]: 4: Hoare triple {554#(<= ~counter~0 0)} call #t~ret7 := main(); {554#(<= ~counter~0 0)} is VALID [2022-04-28 12:46:10,156 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {554#(<= ~counter~0 0)} {546#true} #54#return; {554#(<= ~counter~0 0)} is VALID [2022-04-28 12:46:10,156 INFO L290 TraceCheckUtils]: 2: Hoare triple {554#(<= ~counter~0 0)} assume true; {554#(<= ~counter~0 0)} is VALID [2022-04-28 12:46:10,157 INFO L290 TraceCheckUtils]: 1: Hoare triple {546#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {554#(<= ~counter~0 0)} is VALID [2022-04-28 12:46:10,157 INFO L272 TraceCheckUtils]: 0: Hoare triple {546#true} call ULTIMATE.init(); {546#true} is VALID [2022-04-28 12:46:10,157 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 12:46:10,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 12:46:10,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067401737] [2022-04-28 12:46:10,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 12:46:10,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278911990] [2022-04-28 12:46:10,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278911990] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-28 12:46:10,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-28 12:46:10,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-04-28 12:46:10,159 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 12:46:10,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [983005224] [2022-04-28 12:46:10,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [983005224] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 12:46:10,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 12:46:10,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-28 12:46:10,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749446539] [2022-04-28 12:46:10,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 12:46:10,165 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 12:46:10,165 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 12:46:10,165 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 12:46:10,187 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 12:46:10,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-28 12:46:10,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 12:46:10,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-28 12:46:10,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-28 12:46:10,188 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 12:46:10,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:46:10,281 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-04-28 12:46:10,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-28 12:46:10,281 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 12:46:10,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 12:46:10,282 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 12:46:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 36 transitions. [2022-04-28 12:46:10,284 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 12:46:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 36 transitions. [2022-04-28 12:46:10,285 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 36 transitions. [2022-04-28 12:46:10,317 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 36 edges. 36 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 12:46:10,319 INFO L225 Difference]: With dead ends: 34 [2022-04-28 12:46:10,319 INFO L226 Difference]: Without dead ends: 27 [2022-04-28 12:46:10,319 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 12:46:10,320 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-28 12:46:10,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-28 12:46:10,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-28 12:46:10,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-28 12:46:10,341 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 12:46:10,341 INFO L82 GeneralOperation]: Start isEquivalent. First operand 27 states. Second operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 12:46:10,342 INFO L74 IsIncluded]: Start isIncluded. First operand 27 states. Second operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 12:46:10,342 INFO L87 Difference]: Start difference. First operand 27 states. Second operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 12:46:10,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:46:10,346 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-04-28 12:46:10,346 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-04-28 12:46:10,350 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 12:46:10,351 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 12:46:10,351 INFO L74 IsIncluded]: Start isIncluded. First operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 27 states. [2022-04-28 12:46:10,351 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand 27 states. [2022-04-28 12:46:10,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:46:10,358 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-04-28 12:46:10,358 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-04-28 12:46:10,359 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 12:46:10,359 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 12:46:10,359 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 12:46:10,359 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 12:46:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-28 12:46:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-04-28 12:46:10,362 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2022-04-28 12:46:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 12:46:10,362 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-04-28 12:46:10,362 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 12:46:10,363 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 27 states and 29 transitions. [2022-04-28 12:46:10,394 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 12:46:10,394 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-04-28 12:46:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-28 12:46:10,395 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 12:46:10,395 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-28 12:46:10,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-28 12:46:10,618 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 12:46:10,618 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 12:46:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 12:46:10,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2022-04-28 12:46:10,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 12:46:10,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1027350510] [2022-04-28 12:46:19,901 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-28 12:46:19,901 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-28 12:46:19,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 2 times [2022-04-28 12:46:19,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 12:46:19,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970955288] [2022-04-28 12:46:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 12:46:19,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 12:46:19,914 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 12:46:19,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785306536] [2022-04-28 12:46:19,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-28 12:46:19,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 12:46:19,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 12:46:19,917 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 12:46:19,918 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 12:46:19,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-28 12:46:19,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 12:46:19,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-28 12:46:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 12:46:19,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 12:46:20,156 INFO L272 TraceCheckUtils]: 0: Hoare triple {848#true} call ULTIMATE.init(); {848#true} is VALID [2022-04-28 12:46:20,156 INFO L290 TraceCheckUtils]: 1: Hoare triple {848#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {848#true} is VALID [2022-04-28 12:46:20,156 INFO L290 TraceCheckUtils]: 2: Hoare triple {848#true} assume true; {848#true} is VALID [2022-04-28 12:46:20,157 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {848#true} {848#true} #54#return; {848#true} is VALID [2022-04-28 12:46:20,157 INFO L272 TraceCheckUtils]: 4: Hoare triple {848#true} call #t~ret7 := main(); {848#true} is VALID [2022-04-28 12:46:20,158 INFO L290 TraceCheckUtils]: 5: Hoare triple {848#true} havoc ~z~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~k~0 := #t~nondet5;havoc #t~nondet5;~x~0 := 1;~y~0 := 1;~c~0 := 1; {868#(and (= main_~y~0 1) (= main_~x~0 1))} is VALID [2022-04-28 12:46:20,158 INFO L290 TraceCheckUtils]: 6: Hoare triple {868#(and (= main_~y~0 1) (= main_~x~0 1))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {868#(and (= main_~y~0 1) (= main_~x~0 1))} is VALID [2022-04-28 12:46:20,159 INFO L290 TraceCheckUtils]: 7: Hoare triple {868#(and (= main_~y~0 1) (= main_~x~0 1))} assume !!(#t~post6 < 2);havoc #t~post6; {868#(and (= main_~y~0 1) (= main_~x~0 1))} is VALID [2022-04-28 12:46:20,159 INFO L272 TraceCheckUtils]: 8: Hoare triple {868#(and (= main_~y~0 1) (= main_~x~0 1))} call __VERIFIER_assert((if 0 == 1 + ~x~0 * ~z~0 - ~x~0 - ~z~0 * ~y~0 then 1 else 0)); {848#true} is VALID [2022-04-28 12:46:20,159 INFO L290 TraceCheckUtils]: 9: Hoare triple {848#true} ~cond := #in~cond; {881#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-28 12:46:20,160 INFO L290 TraceCheckUtils]: 10: Hoare triple {881#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {885#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 12:46:20,160 INFO L290 TraceCheckUtils]: 11: Hoare triple {885#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {885#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 12:46:20,161 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {885#(not (= |__VERIFIER_assert_#in~cond| 0))} {868#(and (= main_~y~0 1) (= main_~x~0 1))} #50#return; {868#(and (= main_~y~0 1) (= main_~x~0 1))} is VALID [2022-04-28 12:46:20,162 INFO L290 TraceCheckUtils]: 13: Hoare triple {868#(and (= main_~y~0 1) (= main_~x~0 1))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := 1 + ~x~0 * ~z~0;~y~0 := ~y~0 * ~z~0; {895#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ main_~z~0 1)))} is VALID [2022-04-28 12:46:20,162 INFO L290 TraceCheckUtils]: 14: Hoare triple {895#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ main_~z~0 1)))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {895#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ main_~z~0 1)))} is VALID [2022-04-28 12:46:20,163 INFO L290 TraceCheckUtils]: 15: Hoare triple {895#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ main_~z~0 1)))} assume !!(#t~post6 < 2);havoc #t~post6; {895#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ main_~z~0 1)))} is VALID [2022-04-28 12:46:20,164 INFO L272 TraceCheckUtils]: 16: Hoare triple {895#(and (= main_~z~0 main_~y~0) (= main_~x~0 (+ main_~z~0 1)))} call __VERIFIER_assert((if 0 == 1 + ~x~0 * ~z~0 - ~x~0 - ~z~0 * ~y~0 then 1 else 0)); {905#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 12:46:20,165 INFO L290 TraceCheckUtils]: 17: Hoare triple {905#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {909#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 12:46:20,165 INFO L290 TraceCheckUtils]: 18: Hoare triple {909#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {849#false} is VALID [2022-04-28 12:46:20,166 INFO L290 TraceCheckUtils]: 19: Hoare triple {849#false} assume !false; {849#false} is VALID [2022-04-28 12:46:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 12:46:20,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-28 12:46:34,319 INFO L290 TraceCheckUtils]: 19: Hoare triple {849#false} assume !false; {849#false} is VALID [2022-04-28 12:46:34,322 INFO L290 TraceCheckUtils]: 18: Hoare triple {909#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {849#false} is VALID [2022-04-28 12:46:34,322 INFO L290 TraceCheckUtils]: 17: Hoare triple {905#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {909#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 12:46:34,323 INFO L272 TraceCheckUtils]: 16: Hoare triple {925#(= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1))} call __VERIFIER_assert((if 0 == 1 + ~x~0 * ~z~0 - ~x~0 - ~z~0 * ~y~0 then 1 else 0)); {905#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 12:46:34,323 INFO L290 TraceCheckUtils]: 15: Hoare triple {925#(= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1))} assume !!(#t~post6 < 2);havoc #t~post6; {925#(= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1))} is VALID [2022-04-28 12:46:34,324 INFO L290 TraceCheckUtils]: 14: Hoare triple {925#(= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {925#(= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1))} is VALID [2022-04-28 12:46:34,329 INFO L290 TraceCheckUtils]: 13: Hoare triple {935#(= (+ (* main_~z~0 (+ (* main_~z~0 main_~x~0) 1)) 1) (+ (* main_~z~0 main_~x~0) (* main_~z~0 (* main_~z~0 main_~y~0)) 1))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := 1 + ~x~0 * ~z~0;~y~0 := ~y~0 * ~z~0; {925#(= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1))} is VALID [2022-04-28 12:46:34,331 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {885#(not (= |__VERIFIER_assert_#in~cond| 0))} {848#true} #50#return; {935#(= (+ (* main_~z~0 (+ (* main_~z~0 main_~x~0) 1)) 1) (+ (* main_~z~0 main_~x~0) (* main_~z~0 (* main_~z~0 main_~y~0)) 1))} is VALID [2022-04-28 12:46:34,331 INFO L290 TraceCheckUtils]: 11: Hoare triple {885#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {885#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 12:46:34,332 INFO L290 TraceCheckUtils]: 10: Hoare triple {948#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} assume !(0 == ~cond); {885#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 12:46:34,332 INFO L290 TraceCheckUtils]: 9: Hoare triple {848#true} ~cond := #in~cond; {948#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-28 12:46:34,332 INFO L272 TraceCheckUtils]: 8: Hoare triple {848#true} call __VERIFIER_assert((if 0 == 1 + ~x~0 * ~z~0 - ~x~0 - ~z~0 * ~y~0 then 1 else 0)); {848#true} is VALID [2022-04-28 12:46:34,332 INFO L290 TraceCheckUtils]: 7: Hoare triple {848#true} assume !!(#t~post6 < 2);havoc #t~post6; {848#true} is VALID [2022-04-28 12:46:34,332 INFO L290 TraceCheckUtils]: 6: Hoare triple {848#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {848#true} is VALID [2022-04-28 12:46:34,333 INFO L290 TraceCheckUtils]: 5: Hoare triple {848#true} havoc ~z~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~k~0 := #t~nondet5;havoc #t~nondet5;~x~0 := 1;~y~0 := 1;~c~0 := 1; {848#true} is VALID [2022-04-28 12:46:34,333 INFO L272 TraceCheckUtils]: 4: Hoare triple {848#true} call #t~ret7 := main(); {848#true} is VALID [2022-04-28 12:46:34,333 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {848#true} {848#true} #54#return; {848#true} is VALID [2022-04-28 12:46:34,333 INFO L290 TraceCheckUtils]: 2: Hoare triple {848#true} assume true; {848#true} is VALID [2022-04-28 12:46:34,333 INFO L290 TraceCheckUtils]: 1: Hoare triple {848#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {848#true} is VALID [2022-04-28 12:46:34,334 INFO L272 TraceCheckUtils]: 0: Hoare triple {848#true} call ULTIMATE.init(); {848#true} is VALID [2022-04-28 12:46:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-28 12:46:34,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 12:46:34,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970955288] [2022-04-28 12:46:34,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 12:46:34,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785306536] [2022-04-28 12:46:34,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785306536] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-28 12:46:34,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-28 12:46:34,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-04-28 12:46:34,335 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 12:46:34,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1027350510] [2022-04-28 12:46:34,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1027350510] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 12:46:34,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 12:46:34,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-28 12:46:34,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920944615] [2022-04-28 12:46:34,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 12:46:34,336 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-28 12:46:34,336 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 12:46:34,336 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 12:46:34,356 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 12:46:34,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-28 12:46:34,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 12:46:34,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-28 12:46:34,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-28 12:46:34,357 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 12:46:34,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:46:34,599 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-04-28 12:46:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-28 12:46:34,600 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-04-28 12:46:34,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 12:46:34,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 12:46:34,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 36 transitions. [2022-04-28 12:46:34,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 12:46:34,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 36 transitions. [2022-04-28 12:46:34,603 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 8 states and 36 transitions. [2022-04-28 12:46:34,637 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 36 edges. 36 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 12:46:34,638 INFO L225 Difference]: With dead ends: 36 [2022-04-28 12:46:34,638 INFO L226 Difference]: Without dead ends: 33 [2022-04-28 12:46:34,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-28 12:46:34,639 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-28 12:46:34,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 92 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-28 12:46:34,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-28 12:46:34,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-04-28 12:46:34,658 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 12:46:34,658 INFO L82 GeneralOperation]: Start isEquivalent. First operand 33 states. Second operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 12:46:34,658 INFO L74 IsIncluded]: Start isIncluded. First operand 33 states. Second operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 12:46:34,658 INFO L87 Difference]: Start difference. First operand 33 states. Second operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 12:46:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:46:34,660 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-04-28 12:46:34,660 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-28 12:46:34,660 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 12:46:34,660 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 12:46:34,660 INFO L74 IsIncluded]: Start isIncluded. First operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 33 states. [2022-04-28 12:46:34,661 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 33 states. [2022-04-28 12:46:34,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:46:34,662 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-04-28 12:46:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-28 12:46:34,662 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 12:46:34,662 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 12:46:34,662 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 12:46:34,662 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 12:46:34,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-28 12:46:34,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-04-28 12:46:34,664 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2022-04-28 12:46:34,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 12:46:34,664 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-04-28 12:46:34,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-28 12:46:34,664 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 33 states and 35 transitions. [2022-04-28 12:46:34,697 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 12:46:34,697 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-04-28 12:46:34,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-28 12:46:34,698 INFO L187 NwaCegarLoop]: Found error trace [2022-04-28 12:46:34,698 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 12:46:34,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-28 12:46:34,899 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 12:46:34,899 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-28 12:46:34,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-28 12:46:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 3 times [2022-04-28 12:46:34,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-28 12:46:34,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [873874692] [2022-04-28 12:46:46,987 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-28 12:46:46,987 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-28 12:46:46,988 INFO L85 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 4 times [2022-04-28 12:46:46,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-28 12:46:46,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744301943] [2022-04-28 12:46:46,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-28 12:46:46,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-28 12:46:47,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-28 12:46:47,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273127615] [2022-04-28 12:46:47,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-28 12:46:47,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-28 12:46:47,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-28 12:46:47,004 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 12:46:47,007 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 12:46:47,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-28 12:46:47,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-28 12:46:47,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-28 12:46:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-28 12:46:47,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-28 12:46:49,626 WARN L828 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-28 12:47:24,173 WARN L828 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-28 12:47:28,198 WARN L828 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-28 12:47:34,213 WARN L828 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-28 12:47:36,793 INFO L272 TraceCheckUtils]: 0: Hoare triple {1186#true} call ULTIMATE.init(); {1186#true} is VALID [2022-04-28 12:47:36,793 INFO L290 TraceCheckUtils]: 1: Hoare triple {1186#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {1186#true} is VALID [2022-04-28 12:47:36,793 INFO L290 TraceCheckUtils]: 2: Hoare triple {1186#true} assume true; {1186#true} is VALID [2022-04-28 12:47:36,793 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1186#true} {1186#true} #54#return; {1186#true} is VALID [2022-04-28 12:47:36,793 INFO L272 TraceCheckUtils]: 4: Hoare triple {1186#true} call #t~ret7 := main(); {1186#true} is VALID [2022-04-28 12:47:36,794 INFO L290 TraceCheckUtils]: 5: Hoare triple {1186#true} havoc ~z~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~k~0 := #t~nondet5;havoc #t~nondet5;~x~0 := 1;~y~0 := 1;~c~0 := 1; {1186#true} is VALID [2022-04-28 12:47:36,794 INFO L290 TraceCheckUtils]: 6: Hoare triple {1186#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1186#true} is VALID [2022-04-28 12:47:36,794 INFO L290 TraceCheckUtils]: 7: Hoare triple {1186#true} assume !!(#t~post6 < 2);havoc #t~post6; {1186#true} is VALID [2022-04-28 12:47:36,794 INFO L272 TraceCheckUtils]: 8: Hoare triple {1186#true} call __VERIFIER_assert((if 0 == 1 + ~x~0 * ~z~0 - ~x~0 - ~z~0 * ~y~0 then 1 else 0)); {1186#true} is VALID [2022-04-28 12:47:36,794 INFO L290 TraceCheckUtils]: 9: Hoare triple {1186#true} ~cond := #in~cond; {1218#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-28 12:47:36,795 INFO L290 TraceCheckUtils]: 10: Hoare triple {1218#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {1222#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 12:47:36,795 INFO L290 TraceCheckUtils]: 11: Hoare triple {1222#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {1222#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 12:47:36,796 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {1222#(not (= |__VERIFIER_assert_#in~cond| 0))} {1186#true} #50#return; {1229#(= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1))} is VALID [2022-04-28 12:47:38,798 WARN L290 TraceCheckUtils]: 13: Hoare triple {1229#(= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := 1 + ~x~0 * ~z~0;~y~0 := ~y~0 * ~z~0; {1233#(or (and (= main_~z~0 0) (= main_~y~0 0) (exists ((v_main_~y~0_28 Int) (v_main_~x~0_28 Int)) (and (<= (+ (* v_main_~x~0_28 main_~z~0) 1) main_~x~0) (= (+ (* v_main_~x~0_28 main_~z~0) 1) (+ (* v_main_~y~0_28 main_~z~0) v_main_~x~0_28))))) (and (= (mod main_~y~0 main_~z~0) 0) (exists ((v_main_~x~0_28 Int)) (and (= (+ (* v_main_~x~0_28 main_~z~0) 1) (+ v_main_~x~0_28 (* main_~z~0 (div main_~y~0 main_~z~0)))) (<= (+ (* v_main_~x~0_28 main_~z~0) 1) main_~x~0))) (not (= main_~z~0 0))))} is UNKNOWN [2022-04-28 12:47:38,800 INFO L290 TraceCheckUtils]: 14: Hoare triple {1233#(or (and (= main_~z~0 0) (= main_~y~0 0) (exists ((v_main_~y~0_28 Int) (v_main_~x~0_28 Int)) (and (<= (+ (* v_main_~x~0_28 main_~z~0) 1) main_~x~0) (= (+ (* v_main_~x~0_28 main_~z~0) 1) (+ (* v_main_~y~0_28 main_~z~0) v_main_~x~0_28))))) (and (= (mod main_~y~0 main_~z~0) 0) (exists ((v_main_~x~0_28 Int)) (and (= (+ (* v_main_~x~0_28 main_~z~0) 1) (+ v_main_~x~0_28 (* main_~z~0 (div main_~y~0 main_~z~0)))) (<= (+ (* v_main_~x~0_28 main_~z~0) 1) main_~x~0))) (not (= main_~z~0 0))))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1233#(or (and (= main_~z~0 0) (= main_~y~0 0) (exists ((v_main_~y~0_28 Int) (v_main_~x~0_28 Int)) (and (<= (+ (* v_main_~x~0_28 main_~z~0) 1) main_~x~0) (= (+ (* v_main_~x~0_28 main_~z~0) 1) (+ (* v_main_~y~0_28 main_~z~0) v_main_~x~0_28))))) (and (= (mod main_~y~0 main_~z~0) 0) (exists ((v_main_~x~0_28 Int)) (and (= (+ (* v_main_~x~0_28 main_~z~0) 1) (+ v_main_~x~0_28 (* main_~z~0 (div main_~y~0 main_~z~0)))) (<= (+ (* v_main_~x~0_28 main_~z~0) 1) main_~x~0))) (not (= main_~z~0 0))))} is VALID [2022-04-28 12:47:38,802 INFO L290 TraceCheckUtils]: 15: Hoare triple {1233#(or (and (= main_~z~0 0) (= main_~y~0 0) (exists ((v_main_~y~0_28 Int) (v_main_~x~0_28 Int)) (and (<= (+ (* v_main_~x~0_28 main_~z~0) 1) main_~x~0) (= (+ (* v_main_~x~0_28 main_~z~0) 1) (+ (* v_main_~y~0_28 main_~z~0) v_main_~x~0_28))))) (and (= (mod main_~y~0 main_~z~0) 0) (exists ((v_main_~x~0_28 Int)) (and (= (+ (* v_main_~x~0_28 main_~z~0) 1) (+ v_main_~x~0_28 (* main_~z~0 (div main_~y~0 main_~z~0)))) (<= (+ (* v_main_~x~0_28 main_~z~0) 1) main_~x~0))) (not (= main_~z~0 0))))} assume !!(#t~post6 < 2);havoc #t~post6; {1233#(or (and (= main_~z~0 0) (= main_~y~0 0) (exists ((v_main_~y~0_28 Int) (v_main_~x~0_28 Int)) (and (<= (+ (* v_main_~x~0_28 main_~z~0) 1) main_~x~0) (= (+ (* v_main_~x~0_28 main_~z~0) 1) (+ (* v_main_~y~0_28 main_~z~0) v_main_~x~0_28))))) (and (= (mod main_~y~0 main_~z~0) 0) (exists ((v_main_~x~0_28 Int)) (and (= (+ (* v_main_~x~0_28 main_~z~0) 1) (+ v_main_~x~0_28 (* main_~z~0 (div main_~y~0 main_~z~0)))) (<= (+ (* v_main_~x~0_28 main_~z~0) 1) main_~x~0))) (not (= main_~z~0 0))))} is VALID [2022-04-28 12:47:38,802 INFO L272 TraceCheckUtils]: 16: Hoare triple {1233#(or (and (= main_~z~0 0) (= main_~y~0 0) (exists ((v_main_~y~0_28 Int) (v_main_~x~0_28 Int)) (and (<= (+ (* v_main_~x~0_28 main_~z~0) 1) main_~x~0) (= (+ (* v_main_~x~0_28 main_~z~0) 1) (+ (* v_main_~y~0_28 main_~z~0) v_main_~x~0_28))))) (and (= (mod main_~y~0 main_~z~0) 0) (exists ((v_main_~x~0_28 Int)) (and (= (+ (* v_main_~x~0_28 main_~z~0) 1) (+ v_main_~x~0_28 (* main_~z~0 (div main_~y~0 main_~z~0)))) (<= (+ (* v_main_~x~0_28 main_~z~0) 1) main_~x~0))) (not (= main_~z~0 0))))} call __VERIFIER_assert((if 0 == 1 + ~x~0 * ~z~0 - ~x~0 - ~z~0 * ~y~0 then 1 else 0)); {1186#true} is VALID [2022-04-28 12:47:38,802 INFO L290 TraceCheckUtils]: 17: Hoare triple {1186#true} ~cond := #in~cond; {1218#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-28 12:47:38,802 INFO L290 TraceCheckUtils]: 18: Hoare triple {1218#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {1222#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 12:47:38,803 INFO L290 TraceCheckUtils]: 19: Hoare triple {1222#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {1222#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 12:47:38,804 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {1222#(not (= |__VERIFIER_assert_#in~cond| 0))} {1233#(or (and (= main_~z~0 0) (= main_~y~0 0) (exists ((v_main_~y~0_28 Int) (v_main_~x~0_28 Int)) (and (<= (+ (* v_main_~x~0_28 main_~z~0) 1) main_~x~0) (= (+ (* v_main_~x~0_28 main_~z~0) 1) (+ (* v_main_~y~0_28 main_~z~0) v_main_~x~0_28))))) (and (= (mod main_~y~0 main_~z~0) 0) (exists ((v_main_~x~0_28 Int)) (and (= (+ (* v_main_~x~0_28 main_~z~0) 1) (+ v_main_~x~0_28 (* main_~z~0 (div main_~y~0 main_~z~0)))) (<= (+ (* v_main_~x~0_28 main_~z~0) 1) main_~x~0))) (not (= main_~z~0 0))))} #50#return; {1255#(and (or (and (= (mod main_~y~0 main_~z~0) 0) (not (= main_~z~0 0))) (= main_~y~0 0)) (= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1)))} is VALID [2022-04-28 12:47:40,806 WARN L290 TraceCheckUtils]: 21: Hoare triple {1255#(and (or (and (= (mod main_~y~0 main_~z~0) 0) (not (= main_~z~0 0))) (= main_~y~0 0)) (= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1)))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := 1 + ~x~0 * ~z~0;~y~0 := ~y~0 * ~z~0; {1259#(or (and (= main_~z~0 0) (= main_~x~0 1) (= main_~y~0 0)) (and (= (mod (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0) 0) (= (mod (+ (- 1) main_~x~0) main_~z~0) 0) (not (= main_~z~0 0)) (= main_~y~0 (* main_~z~0 (div (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0))) (= (mod (div (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0) main_~z~0) 0)))} is UNKNOWN [2022-04-28 12:47:40,807 INFO L290 TraceCheckUtils]: 22: Hoare triple {1259#(or (and (= main_~z~0 0) (= main_~x~0 1) (= main_~y~0 0)) (and (= (mod (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0) 0) (= (mod (+ (- 1) main_~x~0) main_~z~0) 0) (not (= main_~z~0 0)) (= main_~y~0 (* main_~z~0 (div (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0))) (= (mod (div (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0) main_~z~0) 0)))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1259#(or (and (= main_~z~0 0) (= main_~x~0 1) (= main_~y~0 0)) (and (= (mod (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0) 0) (= (mod (+ (- 1) main_~x~0) main_~z~0) 0) (not (= main_~z~0 0)) (= main_~y~0 (* main_~z~0 (div (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0))) (= (mod (div (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0) main_~z~0) 0)))} is VALID [2022-04-28 12:47:40,808 INFO L290 TraceCheckUtils]: 23: Hoare triple {1259#(or (and (= main_~z~0 0) (= main_~x~0 1) (= main_~y~0 0)) (and (= (mod (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0) 0) (= (mod (+ (- 1) main_~x~0) main_~z~0) 0) (not (= main_~z~0 0)) (= main_~y~0 (* main_~z~0 (div (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0))) (= (mod (div (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0) main_~z~0) 0)))} assume !(#t~post6 < 2);havoc #t~post6; {1259#(or (and (= main_~z~0 0) (= main_~x~0 1) (= main_~y~0 0)) (and (= (mod (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0) 0) (= (mod (+ (- 1) main_~x~0) main_~z~0) 0) (not (= main_~z~0 0)) (= main_~y~0 (* main_~z~0 (div (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0))) (= (mod (div (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0) main_~z~0) 0)))} is VALID [2022-04-28 12:47:40,816 INFO L272 TraceCheckUtils]: 24: Hoare triple {1259#(or (and (= main_~z~0 0) (= main_~x~0 1) (= main_~y~0 0)) (and (= (mod (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0) 0) (= (mod (+ (- 1) main_~x~0) main_~z~0) 0) (not (= main_~z~0 0)) (= main_~y~0 (* main_~z~0 (div (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0))) (= (mod (div (+ (* main_~z~0 (div (+ (- 1) main_~x~0) main_~z~0)) (* (- 1) (div (+ (- 1) main_~x~0) main_~z~0)) 1) main_~z~0) main_~z~0) 0)))} call __VERIFIER_assert((if 0 == 1 + ~x~0 * ~z~0 - ~x~0 - ~z~0 * ~y~0 then 1 else 0)); {1269#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 12:47:40,816 INFO L290 TraceCheckUtils]: 25: Hoare triple {1269#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {1273#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 12:47:40,817 INFO L290 TraceCheckUtils]: 26: Hoare triple {1273#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {1187#false} is VALID [2022-04-28 12:47:40,817 INFO L290 TraceCheckUtils]: 27: Hoare triple {1187#false} assume !false; {1187#false} is VALID [2022-04-28 12:47:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-28 12:47:40,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-28 12:48:04,900 INFO L290 TraceCheckUtils]: 27: Hoare triple {1187#false} assume !false; {1187#false} is VALID [2022-04-28 12:48:04,902 INFO L290 TraceCheckUtils]: 26: Hoare triple {1273#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {1187#false} is VALID [2022-04-28 12:48:04,903 INFO L290 TraceCheckUtils]: 25: Hoare triple {1269#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {1273#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-28 12:48:04,903 INFO L272 TraceCheckUtils]: 24: Hoare triple {1229#(= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1))} call __VERIFIER_assert((if 0 == 1 + ~x~0 * ~z~0 - ~x~0 - ~z~0 * ~y~0 then 1 else 0)); {1269#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-28 12:48:04,904 INFO L290 TraceCheckUtils]: 23: Hoare triple {1229#(= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1))} assume !(#t~post6 < 2);havoc #t~post6; {1229#(= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1))} is VALID [2022-04-28 12:48:04,904 INFO L290 TraceCheckUtils]: 22: Hoare triple {1229#(= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1229#(= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1))} is VALID [2022-04-28 12:48:04,908 INFO L290 TraceCheckUtils]: 21: Hoare triple {1298#(= (+ (* main_~z~0 (+ (* main_~z~0 main_~x~0) 1)) 1) (+ (* main_~z~0 main_~x~0) (* main_~z~0 (* main_~z~0 main_~y~0)) 1))} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := 1 + ~x~0 * ~z~0;~y~0 := ~y~0 * ~z~0; {1229#(= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1))} is VALID [2022-04-28 12:48:04,911 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {1222#(not (= |__VERIFIER_assert_#in~cond| 0))} {1186#true} #50#return; {1298#(= (+ (* main_~z~0 (+ (* main_~z~0 main_~x~0) 1)) 1) (+ (* main_~z~0 main_~x~0) (* main_~z~0 (* main_~z~0 main_~y~0)) 1))} is VALID [2022-04-28 12:48:04,911 INFO L290 TraceCheckUtils]: 19: Hoare triple {1222#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {1222#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 12:48:04,911 INFO L290 TraceCheckUtils]: 18: Hoare triple {1311#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} assume !(0 == ~cond); {1222#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-28 12:48:04,912 INFO L290 TraceCheckUtils]: 17: Hoare triple {1186#true} ~cond := #in~cond; {1311#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-28 12:48:04,912 INFO L272 TraceCheckUtils]: 16: Hoare triple {1186#true} call __VERIFIER_assert((if 0 == 1 + ~x~0 * ~z~0 - ~x~0 - ~z~0 * ~y~0 then 1 else 0)); {1186#true} is VALID [2022-04-28 12:48:04,912 INFO L290 TraceCheckUtils]: 15: Hoare triple {1186#true} assume !!(#t~post6 < 2);havoc #t~post6; {1186#true} is VALID [2022-04-28 12:48:04,912 INFO L290 TraceCheckUtils]: 14: Hoare triple {1186#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1186#true} is VALID [2022-04-28 12:48:04,912 INFO L290 TraceCheckUtils]: 13: Hoare triple {1186#true} assume !!(~c~0 < ~k~0);~c~0 := 1 + ~c~0;~x~0 := 1 + ~x~0 * ~z~0;~y~0 := ~y~0 * ~z~0; {1186#true} is VALID [2022-04-28 12:48:04,912 INFO L284 TraceCheckUtils]: 12: Hoare quadruple {1186#true} {1186#true} #50#return; {1186#true} is VALID [2022-04-28 12:48:04,913 INFO L290 TraceCheckUtils]: 11: Hoare triple {1186#true} assume true; {1186#true} is VALID [2022-04-28 12:48:04,913 INFO L290 TraceCheckUtils]: 10: Hoare triple {1186#true} assume !(0 == ~cond); {1186#true} is VALID [2022-04-28 12:48:04,913 INFO L290 TraceCheckUtils]: 9: Hoare triple {1186#true} ~cond := #in~cond; {1186#true} is VALID [2022-04-28 12:48:04,913 INFO L272 TraceCheckUtils]: 8: Hoare triple {1186#true} call __VERIFIER_assert((if 0 == 1 + ~x~0 * ~z~0 - ~x~0 - ~z~0 * ~y~0 then 1 else 0)); {1186#true} is VALID [2022-04-28 12:48:04,913 INFO L290 TraceCheckUtils]: 7: Hoare triple {1186#true} assume !!(#t~post6 < 2);havoc #t~post6; {1186#true} is VALID [2022-04-28 12:48:04,913 INFO L290 TraceCheckUtils]: 6: Hoare triple {1186#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1186#true} is VALID [2022-04-28 12:48:04,913 INFO L290 TraceCheckUtils]: 5: Hoare triple {1186#true} havoc ~z~0;havoc ~k~0;havoc ~x~0;havoc ~y~0;havoc ~c~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~z~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~k~0 := #t~nondet5;havoc #t~nondet5;~x~0 := 1;~y~0 := 1;~c~0 := 1; {1186#true} is VALID [2022-04-28 12:48:04,913 INFO L272 TraceCheckUtils]: 4: Hoare triple {1186#true} call #t~ret7 := main(); {1186#true} is VALID [2022-04-28 12:48:04,913 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1186#true} {1186#true} #54#return; {1186#true} is VALID [2022-04-28 12:48:04,914 INFO L290 TraceCheckUtils]: 2: Hoare triple {1186#true} assume true; {1186#true} is VALID [2022-04-28 12:48:04,914 INFO L290 TraceCheckUtils]: 1: Hoare triple {1186#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(10, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {1186#true} is VALID [2022-04-28 12:48:04,914 INFO L272 TraceCheckUtils]: 0: Hoare triple {1186#true} call ULTIMATE.init(); {1186#true} is VALID [2022-04-28 12:48:04,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-28 12:48:04,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-28 12:48:04,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744301943] [2022-04-28 12:48:04,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-28 12:48:04,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273127615] [2022-04-28 12:48:04,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273127615] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-28 12:48:04,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-28 12:48:04,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2022-04-28 12:48:04,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-28 12:48:04,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [873874692] [2022-04-28 12:48:04,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [873874692] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-28 12:48:04,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-28 12:48:04,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-28 12:48:04,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895388696] [2022-04-28 12:48:04,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-28 12:48:04,916 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-04-28 12:48:04,916 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-28 12:48:04,916 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 12:48:08,951 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 25 edges. 23 inductive. 0 not inductive. 2 times theorem prover too weak to decide inductivity. [2022-04-28 12:48:08,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-28 12:48:08,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-28 12:48:08,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-28 12:48:08,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=98, Unknown=1, NotChecked=0, Total=132 [2022-04-28 12:48:08,952 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 12:48:11,106 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-28 12:48:13,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-28 12:48:15,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-28 12:48:17,414 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-28 12:48:19,454 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-28 12:48:21,490 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-28 12:48:24,303 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-28 12:48:24,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:48:24,633 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2022-04-28 12:48:24,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-28 12:48:24,633 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-04-28 12:48:24,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-28 12:48:24,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 12:48:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 29 transitions. [2022-04-28 12:48:24,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 12:48:24,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 29 transitions. [2022-04-28 12:48:24,635 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 7 states and 29 transitions. [2022-04-28 12:48:30,679 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 29 edges. 26 inductive. 0 not inductive. 3 times theorem prover too weak to decide inductivity. [2022-04-28 12:48:30,679 INFO L225 Difference]: With dead ends: 33 [2022-04-28 12:48:30,680 INFO L226 Difference]: Without dead ends: 0 [2022-04-28 12:48:30,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=40, Invalid=115, Unknown=1, NotChecked=0, Total=156 [2022-04-28 12:48:30,680 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2022-04-28 12:48:30,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 97 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 7 Unknown, 9 Unchecked, 14.5s Time] [2022-04-28 12:48:30,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-28 12:48:30,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-28 12:48:30,681 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-28 12:48:30,681 INFO L82 GeneralOperation]: Start isEquivalent. First operand 0 states. Second operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-28 12:48:30,681 INFO L74 IsIncluded]: Start isIncluded. First operand 0 states. Second operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-28 12:48:30,682 INFO L87 Difference]: Start difference. First operand 0 states. Second operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-28 12:48:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:48:30,682 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2022-04-28 12:48:30,682 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-28 12:48:30,682 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 12:48:30,682 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 12:48:30,682 INFO L74 IsIncluded]: Start isIncluded. First operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand 0 states. [2022-04-28 12:48:30,682 INFO L87 Difference]: Start difference. First operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand 0 states. [2022-04-28 12:48:30,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-28 12:48:30,682 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2022-04-28 12:48:30,682 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-28 12:48:30,682 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 12:48:30,683 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-28 12:48:30,683 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-28 12:48:30,683 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-28 12:48:30,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-28 12:48:30,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-28 12:48:30,683 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2022-04-28 12:48:30,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-28 12:48:30,683 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-28 12:48:30,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-28 12:48:30,683 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 0 states and 0 transitions. [2022-04-28 12:48:30,683 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-28 12:48:30,683 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-28 12:48:30,684 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-28 12:48:30,686 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-28 12:48:30,693 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 12:48:30,892 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 12:48:30,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-28 12:48:38,277 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-04-28 12:48:38,278 INFO L899 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-04-28 12:48:38,278 INFO L899 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-04-28 12:48:38,278 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2022-04-28 12:48:38,278 INFO L899 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2022-04-28 12:48:38,278 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2022-04-28 12:48:38,278 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2022-04-28 12:48:38,278 INFO L895 garLoopResultBuilder]: At program point L34-1(lines 34 43) the Hoare annotation is: (let ((.cse1 (= main_~z~0 0))) (let ((.cse0 (= main_~x~0 1)) (.cse4 (not .cse1))) (or (and (<= ~counter~0 1) (= main_~y~0 1) .cse0 (<= |main_#t~post6| 0)) (and .cse1 .cse0 (= main_~y~0 0)) (let ((.cse3 (+ (- 1) main_~x~0))) (let ((.cse2 (let ((.cse6 (div .cse3 main_~z~0))) (+ (* main_~z~0 .cse6) (* (- 1) .cse6) 1)))) (let ((.cse5 (div .cse2 main_~z~0))) (and (= (mod .cse2 main_~z~0) 0) (= (mod .cse3 main_~z~0) 0) .cse4 (= main_~y~0 (* main_~z~0 .cse5)) (= (mod .cse5 main_~z~0) 0))))) (not (<= |old(~counter~0)| 0)) (and (<= |main_#t~post6| 1) (= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1)) .cse4 (= main_~x~0 (+ main_~z~0 1)))))) [2022-04-28 12:48:38,278 INFO L895 garLoopResultBuilder]: At program point L34-3(lines 34 43) the Hoare annotation is: (let ((.cse2 (= main_~z~0 0))) (let ((.cse1 (= main_~x~0 1)) (.cse0 (not .cse2))) (or (and (<= ~counter~0 1) (= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1)) .cse0 (= main_~x~0 (+ main_~z~0 1))) (and (= main_~y~0 1) (<= ~counter~0 0) .cse1) (and .cse2 .cse1 (= main_~y~0 0)) (let ((.cse4 (+ (- 1) main_~x~0))) (let ((.cse3 (let ((.cse6 (div .cse4 main_~z~0))) (+ (* main_~z~0 .cse6) (* (- 1) .cse6) 1)))) (let ((.cse5 (div .cse3 main_~z~0))) (and (= (mod .cse3 main_~z~0) 0) (= (mod .cse4 main_~z~0) 0) .cse0 (= main_~y~0 (* main_~z~0 .cse5)) (= (mod .cse5 main_~z~0) 0))))) (not (<= |old(~counter~0)| 0))))) [2022-04-28 12:48:38,279 INFO L895 garLoopResultBuilder]: At program point L34-4(lines 34 43) the Hoare annotation is: (or (and (= main_~z~0 main_~y~0) (= main_~x~0 (+ main_~z~0 1))) (and (= main_~y~0 1) (= main_~x~0 1)) (let ((.cse1 (+ (- 1) main_~x~0))) (let ((.cse0 (let ((.cse3 (div .cse1 main_~z~0))) (+ (* main_~z~0 .cse3) (* (- 1) .cse3) 1)))) (let ((.cse2 (div .cse0 main_~z~0))) (and (= (mod .cse0 main_~z~0) 0) (= (mod .cse1 main_~z~0) 0) (not (= main_~z~0 0)) (= main_~y~0 (* main_~z~0 .cse2)) (= (mod .cse2 main_~z~0) 0))))) (not (<= |old(~counter~0)| 0))) [2022-04-28 12:48:38,279 INFO L895 garLoopResultBuilder]: At program point mainENTRY(lines 24 46) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (<= |old(~counter~0)| 0))) [2022-04-28 12:48:38,279 INFO L902 garLoopResultBuilder]: At program point mainEXIT(lines 24 46) the Hoare annotation is: true [2022-04-28 12:48:38,279 INFO L902 garLoopResultBuilder]: At program point mainFINAL(lines 24 46) the Hoare annotation is: true [2022-04-28 12:48:38,279 INFO L902 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: true [2022-04-28 12:48:38,279 INFO L895 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse2 (not (= main_~z~0 0)))) (or (and (<= ~counter~0 1) (= main_~y~0 1) (= main_~x~0 1)) (let ((.cse1 (+ (- 1) main_~x~0))) (let ((.cse0 (let ((.cse4 (div .cse1 main_~z~0))) (+ (* main_~z~0 .cse4) (* (- 1) .cse4) 1)))) (let ((.cse3 (div .cse0 main_~z~0))) (and (= (mod .cse0 main_~z~0) 0) (= (mod .cse1 main_~z~0) 0) .cse2 (= main_~y~0 (* main_~z~0 .cse3)) (= (mod .cse3 main_~z~0) 0))))) (not (<= |old(~counter~0)| 0)) (and (or .cse2 (= main_~y~0 0)) (= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1)) (= main_~x~0 (+ main_~z~0 1))))) [2022-04-28 12:48:38,279 INFO L895 garLoopResultBuilder]: At program point L35-1(lines 34 43) the Hoare annotation is: (let ((.cse2 (not (= main_~z~0 0)))) (or (and (<= ~counter~0 1) (= main_~y~0 1) (= main_~x~0 1)) (let ((.cse1 (+ (- 1) main_~x~0))) (let ((.cse0 (let ((.cse4 (div .cse1 main_~z~0))) (+ (* main_~z~0 .cse4) (* (- 1) .cse4) 1)))) (let ((.cse3 (div .cse0 main_~z~0))) (and (= (mod .cse0 main_~z~0) 0) (= (mod .cse1 main_~z~0) 0) .cse2 (= main_~y~0 (* main_~z~0 .cse3)) (= (mod .cse3 main_~z~0) 0))))) (not (<= |old(~counter~0)| 0)) (and (or .cse2 (= main_~y~0 0)) (= (+ main_~x~0 (* main_~z~0 main_~y~0)) (+ (* main_~z~0 main_~x~0) 1)) (= main_~x~0 (+ main_~z~0 1))))) [2022-04-28 12:48:38,279 INFO L895 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-04-28 12:48:38,279 INFO L895 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-28 12:48:38,279 INFO L895 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-04-28 12:48:38,280 INFO L902 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-28 12:48:38,280 INFO L895 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2022-04-28 12:48:38,280 INFO L902 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-28 12:48:38,280 INFO L902 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-28 12:48:38,280 INFO L895 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-28 12:48:38,280 INFO L895 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-28 12:48:38,280 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-28 12:48:38,280 INFO L895 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-28 12:48:38,280 INFO L895 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-28 12:48:38,280 INFO L895 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-28 12:48:38,283 INFO L356 BasicCegarLoop]: Path program histogram: [4, 2, 2, 2, 2] [2022-04-28 12:48:38,284 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-04-28 12:48:38,288 WARN L170 areAnnotationChecker]: reach_errorENTRY has no Hoare annotation [2022-04-28 12:48:38,296 WARN L170 areAnnotationChecker]: assume_abort_if_notENTRY has no Hoare annotation [2022-04-28 12:48:38,298 WARN L170 areAnnotationChecker]: reach_errorFINAL has no Hoare annotation [2022-04-28 12:48:38,299 WARN L170 areAnnotationChecker]: L12 has no Hoare annotation [2022-04-28 12:48:38,299 WARN L170 areAnnotationChecker]: L12 has no Hoare annotation [2022-04-28 12:48:38,305 WARN L170 areAnnotationChecker]: L12-2 has no Hoare annotation [2022-04-28 12:48:40,325 INFO L163 areAnnotationChecker]: CFG has 26 edges. 25 inductive. 0 not inductive. 1 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2022-04-28 12:48:40,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.04 12:48:40 BoogieIcfgContainer [2022-04-28 12:48:40,336 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-28 12:48:40,336 INFO L158 Benchmark]: Toolchain (without parser) took 164072.26ms. Allocated memory was 178.3MB in the beginning and 233.8MB in the end (delta: 55.6MB). Free memory was 125.0MB in the beginning and 77.7MB in the end (delta: 47.4MB). Peak memory consumption was 103.6MB. Max. memory is 8.0GB. [2022-04-28 12:48:40,337 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 178.3MB. Free memory is still 141.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-28 12:48:40,337 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.39ms. Allocated memory is still 178.3MB. Free memory was 124.8MB in the beginning and 154.2MB in the end (delta: -29.4MB). Peak memory consumption was 12.1MB. Max. memory is 8.0GB. [2022-04-28 12:48:40,337 INFO L158 Benchmark]: Boogie Preprocessor took 43.12ms. Allocated memory is still 178.3MB. Free memory was 154.2MB in the beginning and 152.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-28 12:48:40,337 INFO L158 Benchmark]: RCFGBuilder took 247.31ms. Allocated memory is still 178.3MB. Free memory was 152.6MB in the beginning and 142.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-28 12:48:40,338 INFO L158 Benchmark]: TraceAbstraction took 163584.00ms. Allocated memory was 178.3MB in the beginning and 233.8MB in the end (delta: 55.6MB). Free memory was 141.6MB in the beginning and 78.2MB in the end (delta: 63.4MB). Peak memory consumption was 119.8MB. Max. memory is 8.0GB. [2022-04-28 12:48:40,339 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 0.14ms. Allocated memory is still 178.3MB. Free memory is still 141.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 193.39ms. Allocated memory is still 178.3MB. Free memory was 124.8MB in the beginning and 154.2MB in the end (delta: -29.4MB). Peak memory consumption was 12.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.12ms. Allocated memory is still 178.3MB. Free memory was 154.2MB in the beginning and 152.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 247.31ms. Allocated memory is still 178.3MB. Free memory was 152.6MB in the beginning and 142.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 163584.00ms. Allocated memory was 178.3MB in the beginning and 233.8MB in the end (delta: 55.6MB). Free memory was 141.6MB in the beginning and 78.2MB in the end (delta: 63.4MB). Peak memory consumption was 119.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 161.5s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 22.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 7.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7 mSolverCounterUnknown, 45 SdHoareTripleChecker+Valid, 14.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 42 mSDsluCounter, 369 SdHoareTripleChecker+Invalid, 14.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 9 IncrementalHoareTripleChecker+Unchecked, 259 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 170 IncrementalHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 110 mSDtfsCounter, 170 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 165 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=5, InterpolantAutomatonStates: 33, 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: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 76 PreInvPairs, 120 NumberOfFragments, 648 HoareAnnotationTreeSize, 76 FomulaSimplifications, 3 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 22 FomulaSimplificationsInter, 282 FormulaSimplificationTreeSizeReductionInter, 7.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((counter <= 1 && x + z * y == z * x + 1) && !(z == 0)) && x == z + 1) || ((y == 1 && counter <= 0) && x == 1)) || ((z == 0 && x == 1) && y == 0)) || (((((z * ((-1 + x) / z) + -1 * ((-1 + x) / z) + 1) % z == 0 && (-1 + x) % z == 0) && !(z == 0)) && y == z * ((z * ((-1 + x) / z) + -1 * ((-1 + x) / z) + 1) / z)) && (z * ((-1 + x) / z) + -1 * ((-1 + x) / z) + 1) / z % z == 0)) || !(\old(counter) <= 0) - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-04-28 12:48:40,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...