/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-08 07:28:23,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-08 07:28:23,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-08 07:28:23,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-08 07:28:23,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-08 07:28:23,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-08 07:28:23,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-08 07:28:23,291 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-08 07:28:23,303 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-08 07:28:23,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-08 07:28:23,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-08 07:28:23,305 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-08 07:28:23,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-08 07:28:23,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-08 07:28:23,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-08 07:28:23,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-08 07:28:23,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-08 07:28:23,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-08 07:28:23,306 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-08 07:28:23,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-08 07:28:23,307 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-08 07:28:23,307 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-08 07:28:23,307 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-08 07:28:23,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-08 07:28:23,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-08 07:28:23,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-08 07:28:23,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-08 07:28:23,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-08 07:28:23,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-08 07:28:23,308 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-08 07:28:23,308 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-08 07:28:23,308 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-08 07:28:23,308 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-08 07:28:23,308 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-08 07:28:23,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-08 07:28:23,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-08 07:28:23,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-08 07:28:23,513 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-08 07:28:23,514 INFO L275 PluginConnector]: CDTParser initialized [2022-04-08 07:28:23,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2022-04-08 07:28:23,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/673ee95f6/01b6db74fbc1473e8498476f9e508b73/FLAGd87c6387f [2022-04-08 07:28:23,868 INFO L306 CDTParser]: Found 1 translation units. [2022-04-08 07:28:23,868 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_unwindbound100.c [2022-04-08 07:28:23,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/673ee95f6/01b6db74fbc1473e8498476f9e508b73/FLAGd87c6387f [2022-04-08 07:28:24,316 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/673ee95f6/01b6db74fbc1473e8498476f9e508b73 [2022-04-08 07:28:24,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-08 07:28:24,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-08 07:28:24,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-08 07:28:24,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-08 07:28:24,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-08 07:28:24,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.04 07:28:24" (1/1) ... [2022-04-08 07:28:24,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33b2a268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 07:28:24, skipping insertion in model container [2022-04-08 07:28:24,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.04 07:28:24" (1/1) ... [2022-04-08 07:28:24,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-08 07:28:24,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-08 07:28:24,501 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/prodbin-ll_unwindbound100.c[537,550] [2022-04-08 07:28:24,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-08 07:28:24,521 INFO L203 MainTranslator]: Completed pre-run [2022-04-08 07:28:24,531 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/prodbin-ll_unwindbound100.c[537,550] [2022-04-08 07:28:24,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-08 07:28:24,547 INFO L208 MainTranslator]: Completed translation [2022-04-08 07:28:24,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 07:28:24 WrapperNode [2022-04-08 07:28:24,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-08 07:28:24,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-08 07:28:24,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-08 07:28:24,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-08 07:28:24,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 07:28:24" (1/1) ... [2022-04-08 07:28:24,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 07:28:24" (1/1) ... [2022-04-08 07:28:24,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 07:28:24" (1/1) ... [2022-04-08 07:28:24,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 07:28:24" (1/1) ... [2022-04-08 07:28:24,566 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 07:28:24" (1/1) ... [2022-04-08 07:28:24,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 07:28:24" (1/1) ... [2022-04-08 07:28:24,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 07:28:24" (1/1) ... [2022-04-08 07:28:24,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-08 07:28:24,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-08 07:28:24,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-08 07:28:24,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-08 07:28:24,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 07:28:24" (1/1) ... [2022-04-08 07:28:24,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-08 07:28:24,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 07:28:24,604 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) [2022-04-08 07:28:24,610 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 [2022-04-08 07:28:24,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-08 07:28:24,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-08 07:28:24,632 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-08 07:28:24,632 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-08 07:28:24,632 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-08 07:28:24,633 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-08 07:28:24,633 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-08 07:28:24,633 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-08 07:28:24,633 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-08 07:28:24,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-08 07:28:24,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-08 07:28:24,636 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-08 07:28:24,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-08 07:28:24,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-08 07:28:24,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-08 07:28:24,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-08 07:28:24,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-08 07:28:24,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-08 07:28:24,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-08 07:28:24,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-08 07:28:24,686 INFO L234 CfgBuilder]: Building ICFG [2022-04-08 07:28:24,687 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-08 07:28:24,847 INFO L275 CfgBuilder]: Performing block encoding [2022-04-08 07:28:24,854 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-08 07:28:24,854 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-08 07:28:24,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.04 07:28:24 BoogieIcfgContainer [2022-04-08 07:28:24,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-08 07:28:24,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-08 07:28:24,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-08 07:28:24,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-08 07:28:24,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.04 07:28:24" (1/3) ... [2022-04-08 07:28:24,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aea13a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.04 07:28:24, skipping insertion in model container [2022-04-08 07:28:24,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 07:28:24" (2/3) ... [2022-04-08 07:28:24,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aea13a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.04 07:28:24, skipping insertion in model container [2022-04-08 07:28:24,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.04 07:28:24" (3/3) ... [2022-04-08 07:28:24,873 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound100.c [2022-04-08 07:28:24,880 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-08 07:28:24,880 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-08 07:28:24,909 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-08 07:28:24,915 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-08 07:28:24,915 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-08 07:28:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:28:24,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-08 07:28:24,936 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 07:28:24,937 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 07:28:24,937 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 07:28:24,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 07:28:24,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1523633710, now seen corresponding path program 1 times [2022-04-08 07:28:24,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 07:28:24,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1226950472] [2022-04-08 07:28:24,959 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-08 07:28:24,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1523633710, now seen corresponding path program 2 times [2022-04-08 07:28:24,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 07:28:24,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50060107] [2022-04-08 07:28:24,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 07:28:24,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 07:28:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 07:28:25,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-08 07:28:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 07:28:25,226 INFO L290 TraceCheckUtils]: 0: Hoare triple {42#(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(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {33#true} is VALID [2022-04-08 07:28:25,227 INFO L290 TraceCheckUtils]: 1: Hoare triple {33#true} assume true; {33#true} is VALID [2022-04-08 07:28:25,227 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {33#true} {33#true} #65#return; {33#true} is VALID [2022-04-08 07:28:25,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-08 07:28:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 07:28:25,242 INFO L290 TraceCheckUtils]: 0: Hoare triple {33#true} ~cond := #in~cond; {33#true} is VALID [2022-04-08 07:28:25,243 INFO L290 TraceCheckUtils]: 1: Hoare triple {33#true} assume 0 == ~cond;assume false; {34#false} is VALID [2022-04-08 07:28:25,243 INFO L290 TraceCheckUtils]: 2: Hoare triple {34#false} assume true; {34#false} is VALID [2022-04-08 07:28:25,243 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {34#false} {33#true} #59#return; {34#false} is VALID [2022-04-08 07:28:25,245 INFO L272 TraceCheckUtils]: 0: Hoare triple {33#true} call ULTIMATE.init(); {42#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-08 07:28:25,246 INFO L290 TraceCheckUtils]: 1: Hoare triple {42#(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(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {33#true} is VALID [2022-04-08 07:28:25,246 INFO L290 TraceCheckUtils]: 2: Hoare triple {33#true} assume true; {33#true} is VALID [2022-04-08 07:28:25,247 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {33#true} {33#true} #65#return; {33#true} is VALID [2022-04-08 07:28:25,247 INFO L272 TraceCheckUtils]: 4: Hoare triple {33#true} call #t~ret7 := main(); {33#true} is VALID [2022-04-08 07:28:25,247 INFO L290 TraceCheckUtils]: 5: Hoare triple {33#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {33#true} is VALID [2022-04-08 07:28:25,247 INFO L272 TraceCheckUtils]: 6: Hoare triple {33#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {33#true} is VALID [2022-04-08 07:28:25,248 INFO L290 TraceCheckUtils]: 7: Hoare triple {33#true} ~cond := #in~cond; {33#true} is VALID [2022-04-08 07:28:25,248 INFO L290 TraceCheckUtils]: 8: Hoare triple {33#true} assume 0 == ~cond;assume false; {34#false} is VALID [2022-04-08 07:28:25,248 INFO L290 TraceCheckUtils]: 9: Hoare triple {34#false} assume true; {34#false} is VALID [2022-04-08 07:28:25,249 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {34#false} {33#true} #59#return; {34#false} is VALID [2022-04-08 07:28:25,249 INFO L290 TraceCheckUtils]: 11: Hoare triple {34#false} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {34#false} is VALID [2022-04-08 07:28:25,250 INFO L290 TraceCheckUtils]: 12: Hoare triple {34#false} assume !true; {34#false} is VALID [2022-04-08 07:28:25,251 INFO L272 TraceCheckUtils]: 13: Hoare triple {34#false} call __VERIFIER_assert((if ~z~0 == ~a~0 * ~b~0 then 1 else 0)); {34#false} is VALID [2022-04-08 07:28:25,251 INFO L290 TraceCheckUtils]: 14: Hoare triple {34#false} ~cond := #in~cond; {34#false} is VALID [2022-04-08 07:28:25,252 INFO L290 TraceCheckUtils]: 15: Hoare triple {34#false} assume 0 == ~cond; {34#false} is VALID [2022-04-08 07:28:25,252 INFO L290 TraceCheckUtils]: 16: Hoare triple {34#false} assume !false; {34#false} is VALID [2022-04-08 07:28:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 07:28:25,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 07:28:25,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50060107] [2022-04-08 07:28:25,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50060107] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:28:25,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:28:25,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-08 07:28:25,259 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 07:28:25,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1226950472] [2022-04-08 07:28:25,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1226950472] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:28:25,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:28:25,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-08 07:28:25,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466787789] [2022-04-08 07:28:25,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 07:28:25,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-08 07:28:25,270 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 07:28:25,273 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 07:28:25,307 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 17 edges. 17 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:28:25,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-08 07:28:25,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 07:28:25,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-08 07:28:25,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-08 07:28:25,337 INFO L87 Difference]: Start difference. First operand has 30 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 07:28:25,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:28:25,523 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2022-04-08 07:28:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-08 07:28:25,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-08 07:28:25,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 07:28:25,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 07:28:25,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2022-04-08 07:28:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 07:28:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2022-04-08 07:28:25,547 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 66 transitions. [2022-04-08 07:28:25,631 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 66 edges. 66 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:28:25,640 INFO L225 Difference]: With dead ends: 52 [2022-04-08 07:28:25,640 INFO L226 Difference]: Without dead ends: 26 [2022-04-08 07:28:25,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-08 07:28:25,646 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-08 07:28:25,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-08 07:28:25,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-08 07:28:25,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-08 07:28:25,677 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 07:28:25,678 INFO L82 GeneralOperation]: Start isEquivalent. First operand 26 states. Second operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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) [2022-04-08 07:28:25,679 INFO L74 IsIncluded]: Start isIncluded. First operand 26 states. Second operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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) [2022-04-08 07:28:25,680 INFO L87 Difference]: Start difference. First operand 26 states. Second operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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) [2022-04-08 07:28:25,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:28:25,684 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-04-08 07:28:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-04-08 07:28:25,685 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:28:25,685 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:28:25,685 INFO L74 IsIncluded]: Start isIncluded. First operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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 26 states. [2022-04-08 07:28:25,686 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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 26 states. [2022-04-08 07:28:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:28:25,691 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-04-08 07:28:25,693 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-04-08 07:28:25,694 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:28:25,699 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:28:25,699 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 07:28:25,699 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 07:28:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 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) [2022-04-08 07:28:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-04-08 07:28:25,704 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2022-04-08 07:28:25,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 07:28:25,704 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-04-08 07:28:25,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 07:28:25,705 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 25 states and 28 transitions. [2022-04-08 07:28:25,739 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:28:25,740 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-04-08 07:28:25,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-08 07:28:25,740 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 07:28:25,740 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 07:28:25,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-08 07:28:25,741 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 07:28:25,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 07:28:25,743 INFO L85 PathProgramCache]: Analyzing trace with hash -991958694, now seen corresponding path program 1 times [2022-04-08 07:28:25,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 07:28:25,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1863217852] [2022-04-08 07:28:25,744 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-08 07:28:25,745 INFO L85 PathProgramCache]: Analyzing trace with hash -991958694, now seen corresponding path program 2 times [2022-04-08 07:28:25,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 07:28:25,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288942026] [2022-04-08 07:28:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 07:28:25,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 07:28:25,777 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 07:28:25,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419544331] [2022-04-08 07:28:25,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-08 07:28:25,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:28:25,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 07:28:25,791 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) [2022-04-08 07:28:25,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-08 07:28:25,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-08 07:28:25,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 07:28:25,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-08 07:28:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 07:28:25,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 07:28:26,020 INFO L272 TraceCheckUtils]: 0: Hoare triple {251#true} call ULTIMATE.init(); {251#true} is VALID [2022-04-08 07:28:26,021 INFO L290 TraceCheckUtils]: 1: Hoare triple {251#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {259#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:26,022 INFO L290 TraceCheckUtils]: 2: Hoare triple {259#(<= ~counter~0 0)} assume true; {259#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:26,022 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {259#(<= ~counter~0 0)} {251#true} #65#return; {259#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:26,023 INFO L272 TraceCheckUtils]: 4: Hoare triple {259#(<= ~counter~0 0)} call #t~ret7 := main(); {259#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:26,023 INFO L290 TraceCheckUtils]: 5: Hoare triple {259#(<= ~counter~0 0)} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {259#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:26,024 INFO L272 TraceCheckUtils]: 6: Hoare triple {259#(<= ~counter~0 0)} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {259#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:26,025 INFO L290 TraceCheckUtils]: 7: Hoare triple {259#(<= ~counter~0 0)} ~cond := #in~cond; {259#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:26,025 INFO L290 TraceCheckUtils]: 8: Hoare triple {259#(<= ~counter~0 0)} assume !(0 == ~cond); {259#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:26,026 INFO L290 TraceCheckUtils]: 9: Hoare triple {259#(<= ~counter~0 0)} assume true; {259#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:26,026 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {259#(<= ~counter~0 0)} {259#(<= ~counter~0 0)} #59#return; {259#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:26,027 INFO L290 TraceCheckUtils]: 11: Hoare triple {259#(<= ~counter~0 0)} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {259#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:26,027 INFO L290 TraceCheckUtils]: 12: Hoare triple {259#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {293#(<= |main_#t~post6| 0)} is VALID [2022-04-08 07:28:26,028 INFO L290 TraceCheckUtils]: 13: Hoare triple {293#(<= |main_#t~post6| 0)} assume !(#t~post6 < 100);havoc #t~post6; {252#false} is VALID [2022-04-08 07:28:26,028 INFO L272 TraceCheckUtils]: 14: Hoare triple {252#false} call __VERIFIER_assert((if ~z~0 == ~a~0 * ~b~0 then 1 else 0)); {252#false} is VALID [2022-04-08 07:28:26,028 INFO L290 TraceCheckUtils]: 15: Hoare triple {252#false} ~cond := #in~cond; {252#false} is VALID [2022-04-08 07:28:26,028 INFO L290 TraceCheckUtils]: 16: Hoare triple {252#false} assume 0 == ~cond; {252#false} is VALID [2022-04-08 07:28:26,029 INFO L290 TraceCheckUtils]: 17: Hoare triple {252#false} assume !false; {252#false} is VALID [2022-04-08 07:28:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 07:28:26,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-08 07:28:26,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 07:28:26,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288942026] [2022-04-08 07:28:26,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 07:28:26,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419544331] [2022-04-08 07:28:26,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419544331] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:28:26,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:28:26,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-08 07:28:26,031 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 07:28:26,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1863217852] [2022-04-08 07:28:26,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1863217852] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:28:26,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:28:26,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-08 07:28:26,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813532255] [2022-04-08 07:28:26,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 07:28:26,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-08 07:28:26,036 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 07:28:26,036 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-08 07:28:26,054 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:28:26,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-08 07:28:26,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 07:28:26,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-08 07:28:26,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-08 07:28:26,055 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-08 07:28:26,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:28:26,126 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-04-08 07:28:26,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-08 07:28:26,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-08 07:28:26,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 07:28:26,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-08 07:28:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 37 transitions. [2022-04-08 07:28:26,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-08 07:28:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 37 transitions. [2022-04-08 07:28:26,135 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 37 transitions. [2022-04-08 07:28:26,163 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 37 edges. 37 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:28:26,165 INFO L225 Difference]: With dead ends: 34 [2022-04-08 07:28:26,165 INFO L226 Difference]: Without dead ends: 27 [2022-04-08 07:28:26,165 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-08 07:28:26,166 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 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 [2022-04-08 07:28:26,167 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-08 07:28:26,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-08 07:28:26,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-04-08 07:28:26,178 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 07:28:26,179 INFO L82 GeneralOperation]: Start isEquivalent. First operand 27 states. Second operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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) [2022-04-08 07:28:26,179 INFO L74 IsIncluded]: Start isIncluded. First operand 27 states. Second operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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) [2022-04-08 07:28:26,179 INFO L87 Difference]: Start difference. First operand 27 states. Second operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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) [2022-04-08 07:28:26,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:28:26,181 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-04-08 07:28:26,181 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-04-08 07:28:26,181 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:28:26,181 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:28:26,182 INFO L74 IsIncluded]: Start isIncluded. First operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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. [2022-04-08 07:28:26,182 INFO L87 Difference]: Start difference. First operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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. [2022-04-08 07:28:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:28:26,184 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2022-04-08 07:28:26,184 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-04-08 07:28:26,184 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:28:26,184 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:28:26,184 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 07:28:26,184 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 07:28:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 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) [2022-04-08 07:28:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-04-08 07:28:26,186 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 18 [2022-04-08 07:28:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 07:28:26,186 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-04-08 07:28:26,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-08 07:28:26,187 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 27 states and 30 transitions. [2022-04-08 07:28:26,214 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 30 edges. 30 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:28:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-04-08 07:28:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-08 07:28:26,215 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 07:28:26,215 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 07:28:26,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-08 07:28:26,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:28:26,436 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 07:28:26,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 07:28:26,436 INFO L85 PathProgramCache]: Analyzing trace with hash -990171234, now seen corresponding path program 1 times [2022-04-08 07:28:26,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 07:28:26,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1642863678] [2022-04-08 07:28:26,437 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-08 07:28:26,437 INFO L85 PathProgramCache]: Analyzing trace with hash -990171234, now seen corresponding path program 2 times [2022-04-08 07:28:26,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 07:28:26,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842654404] [2022-04-08 07:28:26,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 07:28:26,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 07:28:26,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 07:28:26,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862009538] [2022-04-08 07:28:26,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-08 07:28:26,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:28:26,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 07:28:26,454 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) [2022-04-08 07:28:26,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-08 07:28:26,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-08 07:28:26,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 07:28:26,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-08 07:28:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 07:28:26,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 07:28:26,719 INFO L272 TraceCheckUtils]: 0: Hoare triple {484#true} call ULTIMATE.init(); {484#true} is VALID [2022-04-08 07:28:26,719 INFO L290 TraceCheckUtils]: 1: Hoare triple {484#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {484#true} is VALID [2022-04-08 07:28:26,719 INFO L290 TraceCheckUtils]: 2: Hoare triple {484#true} assume true; {484#true} is VALID [2022-04-08 07:28:26,720 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {484#true} {484#true} #65#return; {484#true} is VALID [2022-04-08 07:28:26,720 INFO L272 TraceCheckUtils]: 4: Hoare triple {484#true} call #t~ret7 := main(); {484#true} is VALID [2022-04-08 07:28:26,720 INFO L290 TraceCheckUtils]: 5: Hoare triple {484#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {484#true} is VALID [2022-04-08 07:28:26,720 INFO L272 TraceCheckUtils]: 6: Hoare triple {484#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {484#true} is VALID [2022-04-08 07:28:26,720 INFO L290 TraceCheckUtils]: 7: Hoare triple {484#true} ~cond := #in~cond; {484#true} is VALID [2022-04-08 07:28:26,720 INFO L290 TraceCheckUtils]: 8: Hoare triple {484#true} assume !(0 == ~cond); {484#true} is VALID [2022-04-08 07:28:26,721 INFO L290 TraceCheckUtils]: 9: Hoare triple {484#true} assume true; {484#true} is VALID [2022-04-08 07:28:26,721 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {484#true} {484#true} #59#return; {484#true} is VALID [2022-04-08 07:28:26,721 INFO L290 TraceCheckUtils]: 11: Hoare triple {484#true} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {522#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:28:26,722 INFO L290 TraceCheckUtils]: 12: Hoare triple {522#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {522#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:28:26,722 INFO L290 TraceCheckUtils]: 13: Hoare triple {522#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} assume !!(#t~post6 < 100);havoc #t~post6; {522#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:28:26,723 INFO L272 TraceCheckUtils]: 14: Hoare triple {522#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {532#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 07:28:26,724 INFO L290 TraceCheckUtils]: 15: Hoare triple {532#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {536#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:28:26,724 INFO L290 TraceCheckUtils]: 16: Hoare triple {536#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {485#false} is VALID [2022-04-08 07:28:26,725 INFO L290 TraceCheckUtils]: 17: Hoare triple {485#false} assume !false; {485#false} is VALID [2022-04-08 07:28:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 07:28:26,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-08 07:28:26,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 07:28:26,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842654404] [2022-04-08 07:28:26,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 07:28:26,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862009538] [2022-04-08 07:28:26,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862009538] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:28:26,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:28:26,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-08 07:28:26,726 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 07:28:26,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1642863678] [2022-04-08 07:28:26,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1642863678] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:28:26,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:28:26,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-08 07:28:26,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943098609] [2022-04-08 07:28:26,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 07:28:26,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-08 07:28:26,728 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 07:28:26,728 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 07:28:26,742 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:28:26,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-08 07:28:26,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 07:28:26,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-08 07:28:26,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-08 07:28:26,744 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 07:28:26,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:28:26,874 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-04-08 07:28:26,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-08 07:28:26,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-08 07:28:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 07:28:26,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 07:28:26,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 43 transitions. [2022-04-08 07:28:26,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 07:28:26,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 43 transitions. [2022-04-08 07:28:26,882 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 43 transitions. [2022-04-08 07:28:26,915 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 43 edges. 43 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:28:26,920 INFO L225 Difference]: With dead ends: 38 [2022-04-08 07:28:26,920 INFO L226 Difference]: Without dead ends: 36 [2022-04-08 07:28:26,921 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-08 07:28:26,929 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-08 07:28:26,930 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 75 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-08 07:28:26,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-08 07:28:26,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-04-08 07:28:26,947 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 07:28:26,948 INFO L82 GeneralOperation]: Start isEquivalent. First operand 36 states. Second operand has 32 states, 21 states have (on average 1.1904761904761905) 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), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 07:28:26,948 INFO L74 IsIncluded]: Start isIncluded. First operand 36 states. Second operand has 32 states, 21 states have (on average 1.1904761904761905) 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), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 07:28:26,950 INFO L87 Difference]: Start difference. First operand 36 states. Second operand has 32 states, 21 states have (on average 1.1904761904761905) 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), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 07:28:26,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:28:26,955 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-04-08 07:28:26,955 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-04-08 07:28:26,956 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:28:26,956 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:28:26,957 INFO L74 IsIncluded]: Start isIncluded. First operand has 32 states, 21 states have (on average 1.1904761904761905) 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), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand 36 states. [2022-04-08 07:28:26,957 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.1904761904761905) 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), 3 states have call predecessors, (4), 4 states have call successors, (4) Second operand 36 states. [2022-04-08 07:28:26,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:28:26,959 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-04-08 07:28:26,959 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-04-08 07:28:26,964 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:28:26,964 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:28:26,964 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 07:28:26,964 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 07:28:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.1904761904761905) 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), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 07:28:26,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-04-08 07:28:26,972 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2022-04-08 07:28:26,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 07:28:26,973 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-04-08 07:28:26,973 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-08 07:28:26,973 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 32 states and 35 transitions. [2022-04-08 07:28:27,005 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 35 edges. 35 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:28:27,006 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-04-08 07:28:27,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-08 07:28:27,006 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 07:28:27,006 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 07:28:27,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-08 07:28:27,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-08 07:28:27,220 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 07:28:27,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 07:28:27,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1094479982, now seen corresponding path program 1 times [2022-04-08 07:28:27,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 07:28:27,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [474969051] [2022-04-08 07:28:27,222 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-08 07:28:27,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1094479982, now seen corresponding path program 2 times [2022-04-08 07:28:27,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 07:28:27,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320640223] [2022-04-08 07:28:27,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 07:28:27,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 07:28:27,236 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 07:28:27,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589975110] [2022-04-08 07:28:27,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-08 07:28:27,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:28:27,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 07:28:27,238 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) [2022-04-08 07:28:27,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-08 07:28:27,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-08 07:28:27,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 07:28:27,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-08 07:28:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 07:28:27,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 07:28:27,408 INFO L272 TraceCheckUtils]: 0: Hoare triple {756#true} call ULTIMATE.init(); {756#true} is VALID [2022-04-08 07:28:27,409 INFO L290 TraceCheckUtils]: 1: Hoare triple {756#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {756#true} is VALID [2022-04-08 07:28:27,409 INFO L290 TraceCheckUtils]: 2: Hoare triple {756#true} assume true; {756#true} is VALID [2022-04-08 07:28:27,409 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {756#true} {756#true} #65#return; {756#true} is VALID [2022-04-08 07:28:27,409 INFO L272 TraceCheckUtils]: 4: Hoare triple {756#true} call #t~ret7 := main(); {756#true} is VALID [2022-04-08 07:28:27,409 INFO L290 TraceCheckUtils]: 5: Hoare triple {756#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {756#true} is VALID [2022-04-08 07:28:27,410 INFO L272 TraceCheckUtils]: 6: Hoare triple {756#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {756#true} is VALID [2022-04-08 07:28:27,410 INFO L290 TraceCheckUtils]: 7: Hoare triple {756#true} ~cond := #in~cond; {782#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} is VALID [2022-04-08 07:28:27,410 INFO L290 TraceCheckUtils]: 8: Hoare triple {782#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} assume !(0 == ~cond); {786#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 07:28:27,411 INFO L290 TraceCheckUtils]: 9: Hoare triple {786#(not (= |assume_abort_if_not_#in~cond| 0))} assume true; {786#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 07:28:27,412 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {786#(not (= |assume_abort_if_not_#in~cond| 0))} {756#true} #59#return; {793#(<= 1 main_~b~0)} is VALID [2022-04-08 07:28:27,412 INFO L290 TraceCheckUtils]: 11: Hoare triple {793#(<= 1 main_~b~0)} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {797#(<= 1 main_~y~0)} is VALID [2022-04-08 07:28:27,412 INFO L290 TraceCheckUtils]: 12: Hoare triple {797#(<= 1 main_~y~0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {797#(<= 1 main_~y~0)} is VALID [2022-04-08 07:28:27,413 INFO L290 TraceCheckUtils]: 13: Hoare triple {797#(<= 1 main_~y~0)} assume !!(#t~post6 < 100);havoc #t~post6; {797#(<= 1 main_~y~0)} is VALID [2022-04-08 07:28:27,413 INFO L272 TraceCheckUtils]: 14: Hoare triple {797#(<= 1 main_~y~0)} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {756#true} is VALID [2022-04-08 07:28:27,413 INFO L290 TraceCheckUtils]: 15: Hoare triple {756#true} ~cond := #in~cond; {756#true} is VALID [2022-04-08 07:28:27,413 INFO L290 TraceCheckUtils]: 16: Hoare triple {756#true} assume !(0 == ~cond); {756#true} is VALID [2022-04-08 07:28:27,413 INFO L290 TraceCheckUtils]: 17: Hoare triple {756#true} assume true; {756#true} is VALID [2022-04-08 07:28:27,414 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {756#true} {797#(<= 1 main_~y~0)} #61#return; {797#(<= 1 main_~y~0)} is VALID [2022-04-08 07:28:27,415 INFO L290 TraceCheckUtils]: 19: Hoare triple {797#(<= 1 main_~y~0)} assume !(0 != ~y~0); {757#false} is VALID [2022-04-08 07:28:27,415 INFO L272 TraceCheckUtils]: 20: Hoare triple {757#false} call __VERIFIER_assert((if ~z~0 == ~a~0 * ~b~0 then 1 else 0)); {757#false} is VALID [2022-04-08 07:28:27,415 INFO L290 TraceCheckUtils]: 21: Hoare triple {757#false} ~cond := #in~cond; {757#false} is VALID [2022-04-08 07:28:27,415 INFO L290 TraceCheckUtils]: 22: Hoare triple {757#false} assume 0 == ~cond; {757#false} is VALID [2022-04-08 07:28:27,415 INFO L290 TraceCheckUtils]: 23: Hoare triple {757#false} assume !false; {757#false} is VALID [2022-04-08 07:28:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 07:28:27,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-08 07:28:27,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 07:28:27,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320640223] [2022-04-08 07:28:27,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 07:28:27,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589975110] [2022-04-08 07:28:27,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589975110] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:28:27,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:28:27,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-08 07:28:27,417 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 07:28:27,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [474969051] [2022-04-08 07:28:27,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [474969051] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:28:27,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:28:27,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-08 07:28:27,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72836178] [2022-04-08 07:28:27,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 07:28:27,418 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 24 [2022-04-08 07:28:27,418 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 07:28:27,418 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-04-08 07:28:27,439 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:28:27,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-08 07:28:27,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 07:28:27,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-08 07:28:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-08 07:28:27,441 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-04-08 07:28:27,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:28:27,604 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-04-08 07:28:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-08 07:28:27,604 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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 24 [2022-04-08 07:28:27,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 07:28:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-04-08 07:28:27,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 43 transitions. [2022-04-08 07:28:27,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-04-08 07:28:27,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 43 transitions. [2022-04-08 07:28:27,608 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 43 transitions. [2022-04-08 07:28:27,642 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 43 edges. 43 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:28:27,643 INFO L225 Difference]: With dead ends: 42 [2022-04-08 07:28:27,643 INFO L226 Difference]: Without dead ends: 35 [2022-04-08 07:28:27,643 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-08 07:28:27,644 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-08 07:28:27,644 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 85 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-08 07:28:27,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-08 07:28:27,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-04-08 07:28:27,670 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 07:28:27,671 INFO L82 GeneralOperation]: Start isEquivalent. First operand 35 states. Second operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 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) [2022-04-08 07:28:27,671 INFO L74 IsIncluded]: Start isIncluded. First operand 35 states. Second operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 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) [2022-04-08 07:28:27,671 INFO L87 Difference]: Start difference. First operand 35 states. Second operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 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) [2022-04-08 07:28:27,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:28:27,672 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-04-08 07:28:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-04-08 07:28:27,673 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:28:27,673 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:28:27,673 INFO L74 IsIncluded]: Start isIncluded. First operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 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 35 states. [2022-04-08 07:28:27,673 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 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 35 states. [2022-04-08 07:28:27,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:28:27,675 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-04-08 07:28:27,675 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-04-08 07:28:27,675 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:28:27,675 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:28:27,675 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 07:28:27,675 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 07:28:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 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) [2022-04-08 07:28:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-04-08 07:28:27,677 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 24 [2022-04-08 07:28:27,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 07:28:27,677 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-04-08 07:28:27,677 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-04-08 07:28:27,677 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 33 states and 36 transitions. [2022-04-08 07:28:27,726 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 36 edges. 36 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:28:27,726 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-04-08 07:28:27,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-08 07:28:27,727 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 07:28:27,727 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 07:28:27,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-08 07:28:27,949 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:28:27,950 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 07:28:27,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 07:28:27,950 INFO L85 PathProgramCache]: Analyzing trace with hash 584619061, now seen corresponding path program 1 times [2022-04-08 07:28:27,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 07:28:27,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1693270294] [2022-04-08 07:28:32,083 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-08 07:28:32,083 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-08 07:28:32,083 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 07:28:32,083 INFO L85 PathProgramCache]: Analyzing trace with hash 584619061, now seen corresponding path program 2 times [2022-04-08 07:28:32,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 07:28:32,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180591981] [2022-04-08 07:28:32,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 07:28:32,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 07:28:32,095 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 07:28:32,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557770979] [2022-04-08 07:28:32,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-08 07:28:32,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:28:32,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 07:28:32,096 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) [2022-04-08 07:28:32,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-08 07:28:32,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-08 07:28:32,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 07:28:32,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-08 07:28:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 07:28:32,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 07:28:32,336 INFO L272 TraceCheckUtils]: 0: Hoare triple {1057#true} call ULTIMATE.init(); {1057#true} is VALID [2022-04-08 07:28:32,337 INFO L290 TraceCheckUtils]: 1: Hoare triple {1057#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {1065#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:32,337 INFO L290 TraceCheckUtils]: 2: Hoare triple {1065#(<= ~counter~0 0)} assume true; {1065#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:32,338 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1065#(<= ~counter~0 0)} {1057#true} #65#return; {1065#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:32,340 INFO L272 TraceCheckUtils]: 4: Hoare triple {1065#(<= ~counter~0 0)} call #t~ret7 := main(); {1065#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:32,340 INFO L290 TraceCheckUtils]: 5: Hoare triple {1065#(<= ~counter~0 0)} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {1065#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:32,341 INFO L272 TraceCheckUtils]: 6: Hoare triple {1065#(<= ~counter~0 0)} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {1065#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:32,341 INFO L290 TraceCheckUtils]: 7: Hoare triple {1065#(<= ~counter~0 0)} ~cond := #in~cond; {1065#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:32,341 INFO L290 TraceCheckUtils]: 8: Hoare triple {1065#(<= ~counter~0 0)} assume !(0 == ~cond); {1065#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:32,342 INFO L290 TraceCheckUtils]: 9: Hoare triple {1065#(<= ~counter~0 0)} assume true; {1065#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:32,342 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {1065#(<= ~counter~0 0)} {1065#(<= ~counter~0 0)} #59#return; {1065#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:32,343 INFO L290 TraceCheckUtils]: 11: Hoare triple {1065#(<= ~counter~0 0)} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {1065#(<= ~counter~0 0)} is VALID [2022-04-08 07:28:32,343 INFO L290 TraceCheckUtils]: 12: Hoare triple {1065#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1099#(<= ~counter~0 1)} is VALID [2022-04-08 07:28:32,344 INFO L290 TraceCheckUtils]: 13: Hoare triple {1099#(<= ~counter~0 1)} assume !!(#t~post6 < 100);havoc #t~post6; {1099#(<= ~counter~0 1)} is VALID [2022-04-08 07:28:32,344 INFO L272 TraceCheckUtils]: 14: Hoare triple {1099#(<= ~counter~0 1)} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {1099#(<= ~counter~0 1)} is VALID [2022-04-08 07:28:32,345 INFO L290 TraceCheckUtils]: 15: Hoare triple {1099#(<= ~counter~0 1)} ~cond := #in~cond; {1099#(<= ~counter~0 1)} is VALID [2022-04-08 07:28:32,345 INFO L290 TraceCheckUtils]: 16: Hoare triple {1099#(<= ~counter~0 1)} assume !(0 == ~cond); {1099#(<= ~counter~0 1)} is VALID [2022-04-08 07:28:32,345 INFO L290 TraceCheckUtils]: 17: Hoare triple {1099#(<= ~counter~0 1)} assume true; {1099#(<= ~counter~0 1)} is VALID [2022-04-08 07:28:32,348 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {1099#(<= ~counter~0 1)} {1099#(<= ~counter~0 1)} #61#return; {1099#(<= ~counter~0 1)} is VALID [2022-04-08 07:28:32,349 INFO L290 TraceCheckUtils]: 19: Hoare triple {1099#(<= ~counter~0 1)} assume !!(0 != ~y~0); {1099#(<= ~counter~0 1)} is VALID [2022-04-08 07:28:32,349 INFO L290 TraceCheckUtils]: 20: Hoare triple {1099#(<= ~counter~0 1)} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {1099#(<= ~counter~0 1)} is VALID [2022-04-08 07:28:32,350 INFO L290 TraceCheckUtils]: 21: Hoare triple {1099#(<= ~counter~0 1)} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {1099#(<= ~counter~0 1)} is VALID [2022-04-08 07:28:32,350 INFO L290 TraceCheckUtils]: 22: Hoare triple {1099#(<= ~counter~0 1)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1130#(<= |main_#t~post6| 1)} is VALID [2022-04-08 07:28:32,351 INFO L290 TraceCheckUtils]: 23: Hoare triple {1130#(<= |main_#t~post6| 1)} assume !(#t~post6 < 100);havoc #t~post6; {1058#false} is VALID [2022-04-08 07:28:32,351 INFO L272 TraceCheckUtils]: 24: Hoare triple {1058#false} call __VERIFIER_assert((if ~z~0 == ~a~0 * ~b~0 then 1 else 0)); {1058#false} is VALID [2022-04-08 07:28:32,351 INFO L290 TraceCheckUtils]: 25: Hoare triple {1058#false} ~cond := #in~cond; {1058#false} is VALID [2022-04-08 07:28:32,351 INFO L290 TraceCheckUtils]: 26: Hoare triple {1058#false} assume 0 == ~cond; {1058#false} is VALID [2022-04-08 07:28:32,351 INFO L290 TraceCheckUtils]: 27: Hoare triple {1058#false} assume !false; {1058#false} is VALID [2022-04-08 07:28:32,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 07:28:32,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-08 07:28:32,521 INFO L290 TraceCheckUtils]: 27: Hoare triple {1058#false} assume !false; {1058#false} is VALID [2022-04-08 07:28:32,521 INFO L290 TraceCheckUtils]: 26: Hoare triple {1058#false} assume 0 == ~cond; {1058#false} is VALID [2022-04-08 07:28:32,522 INFO L290 TraceCheckUtils]: 25: Hoare triple {1058#false} ~cond := #in~cond; {1058#false} is VALID [2022-04-08 07:28:32,522 INFO L272 TraceCheckUtils]: 24: Hoare triple {1058#false} call __VERIFIER_assert((if ~z~0 == ~a~0 * ~b~0 then 1 else 0)); {1058#false} is VALID [2022-04-08 07:28:32,523 INFO L290 TraceCheckUtils]: 23: Hoare triple {1158#(< |main_#t~post6| 100)} assume !(#t~post6 < 100);havoc #t~post6; {1058#false} is VALID [2022-04-08 07:28:32,523 INFO L290 TraceCheckUtils]: 22: Hoare triple {1162#(< ~counter~0 100)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1158#(< |main_#t~post6| 100)} is VALID [2022-04-08 07:28:32,525 INFO L290 TraceCheckUtils]: 21: Hoare triple {1162#(< ~counter~0 100)} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {1162#(< ~counter~0 100)} is VALID [2022-04-08 07:28:32,525 INFO L290 TraceCheckUtils]: 20: Hoare triple {1162#(< ~counter~0 100)} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {1162#(< ~counter~0 100)} is VALID [2022-04-08 07:28:32,535 INFO L290 TraceCheckUtils]: 19: Hoare triple {1162#(< ~counter~0 100)} assume !!(0 != ~y~0); {1162#(< ~counter~0 100)} is VALID [2022-04-08 07:28:32,536 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {1057#true} {1162#(< ~counter~0 100)} #61#return; {1162#(< ~counter~0 100)} is VALID [2022-04-08 07:28:32,536 INFO L290 TraceCheckUtils]: 17: Hoare triple {1057#true} assume true; {1057#true} is VALID [2022-04-08 07:28:32,536 INFO L290 TraceCheckUtils]: 16: Hoare triple {1057#true} assume !(0 == ~cond); {1057#true} is VALID [2022-04-08 07:28:32,536 INFO L290 TraceCheckUtils]: 15: Hoare triple {1057#true} ~cond := #in~cond; {1057#true} is VALID [2022-04-08 07:28:32,536 INFO L272 TraceCheckUtils]: 14: Hoare triple {1162#(< ~counter~0 100)} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {1057#true} is VALID [2022-04-08 07:28:32,537 INFO L290 TraceCheckUtils]: 13: Hoare triple {1162#(< ~counter~0 100)} assume !!(#t~post6 < 100);havoc #t~post6; {1162#(< ~counter~0 100)} is VALID [2022-04-08 07:28:32,538 INFO L290 TraceCheckUtils]: 12: Hoare triple {1193#(< ~counter~0 99)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1162#(< ~counter~0 100)} is VALID [2022-04-08 07:28:32,538 INFO L290 TraceCheckUtils]: 11: Hoare triple {1193#(< ~counter~0 99)} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {1193#(< ~counter~0 99)} is VALID [2022-04-08 07:28:32,539 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {1057#true} {1193#(< ~counter~0 99)} #59#return; {1193#(< ~counter~0 99)} is VALID [2022-04-08 07:28:32,539 INFO L290 TraceCheckUtils]: 9: Hoare triple {1057#true} assume true; {1057#true} is VALID [2022-04-08 07:28:32,539 INFO L290 TraceCheckUtils]: 8: Hoare triple {1057#true} assume !(0 == ~cond); {1057#true} is VALID [2022-04-08 07:28:32,539 INFO L290 TraceCheckUtils]: 7: Hoare triple {1057#true} ~cond := #in~cond; {1057#true} is VALID [2022-04-08 07:28:32,539 INFO L272 TraceCheckUtils]: 6: Hoare triple {1193#(< ~counter~0 99)} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {1057#true} is VALID [2022-04-08 07:28:32,540 INFO L290 TraceCheckUtils]: 5: Hoare triple {1193#(< ~counter~0 99)} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {1193#(< ~counter~0 99)} is VALID [2022-04-08 07:28:32,540 INFO L272 TraceCheckUtils]: 4: Hoare triple {1193#(< ~counter~0 99)} call #t~ret7 := main(); {1193#(< ~counter~0 99)} is VALID [2022-04-08 07:28:32,541 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1193#(< ~counter~0 99)} {1057#true} #65#return; {1193#(< ~counter~0 99)} is VALID [2022-04-08 07:28:32,541 INFO L290 TraceCheckUtils]: 2: Hoare triple {1193#(< ~counter~0 99)} assume true; {1193#(< ~counter~0 99)} is VALID [2022-04-08 07:28:32,541 INFO L290 TraceCheckUtils]: 1: Hoare triple {1057#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {1193#(< ~counter~0 99)} is VALID [2022-04-08 07:28:32,542 INFO L272 TraceCheckUtils]: 0: Hoare triple {1057#true} call ULTIMATE.init(); {1057#true} is VALID [2022-04-08 07:28:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 07:28:32,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 07:28:32,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180591981] [2022-04-08 07:28:32,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 07:28:32,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557770979] [2022-04-08 07:28:32,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557770979] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-08 07:28:32,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-08 07:28:32,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-04-08 07:28:32,543 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 07:28:32,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1693270294] [2022-04-08 07:28:32,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1693270294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:28:32,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:28:32,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-08 07:28:32,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565770397] [2022-04-08 07:28:32,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 07:28:32,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-04-08 07:28:32,544 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 07:28:32,544 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 07:28:32,564 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:28:32,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-08 07:28:32,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 07:28:32,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-08 07:28:32,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-04-08 07:28:32,566 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 07:28:32,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:28:32,672 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-04-08 07:28:32,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-08 07:28:32,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2022-04-08 07:28:32,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 07:28:32,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 07:28:32,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 48 transitions. [2022-04-08 07:28:32,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 07:28:32,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 48 transitions. [2022-04-08 07:28:32,676 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 48 transitions. [2022-04-08 07:28:32,712 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 48 edges. 48 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:28:32,713 INFO L225 Difference]: With dead ends: 44 [2022-04-08 07:28:32,713 INFO L226 Difference]: Without dead ends: 37 [2022-04-08 07:28:32,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-04-08 07:28:32,714 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-08 07:28:32,714 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 75 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-08 07:28:32,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-08 07:28:32,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-08 07:28:32,743 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 07:28:32,743 INFO L82 GeneralOperation]: Start isEquivalent. First operand 37 states. Second operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 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) [2022-04-08 07:28:32,743 INFO L74 IsIncluded]: Start isIncluded. First operand 37 states. Second operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 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) [2022-04-08 07:28:32,744 INFO L87 Difference]: Start difference. First operand 37 states. Second operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 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) [2022-04-08 07:28:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:28:32,745 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-04-08 07:28:32,745 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-04-08 07:28:32,745 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:28:32,745 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:28:32,746 INFO L74 IsIncluded]: Start isIncluded. First operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 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 37 states. [2022-04-08 07:28:32,746 INFO L87 Difference]: Start difference. First operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 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 37 states. [2022-04-08 07:28:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:28:32,747 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-04-08 07:28:32,747 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-04-08 07:28:32,747 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:28:32,747 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:28:32,747 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 07:28:32,748 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 07:28:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 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) [2022-04-08 07:28:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-04-08 07:28:32,749 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2022-04-08 07:28:32,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 07:28:32,749 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-04-08 07:28:32,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-08 07:28:32,749 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 37 states and 41 transitions. [2022-04-08 07:28:32,784 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 41 edges. 41 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:28:32,785 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-04-08 07:28:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-08 07:28:32,785 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 07:28:32,785 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 07:28:32,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-08 07:28:33,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:28:33,002 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 07:28:33,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 07:28:33,003 INFO L85 PathProgramCache]: Analyzing trace with hash 586406521, now seen corresponding path program 1 times [2022-04-08 07:28:33,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 07:28:33,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1052287078] [2022-04-08 07:28:33,359 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-08 07:28:33,359 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-08 07:28:33,359 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 07:28:33,360 INFO L85 PathProgramCache]: Analyzing trace with hash 586406521, now seen corresponding path program 2 times [2022-04-08 07:28:33,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 07:28:33,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049196321] [2022-04-08 07:28:33,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 07:28:33,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 07:28:33,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 07:28:33,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013198198] [2022-04-08 07:28:33,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-08 07:28:33,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:28:33,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 07:28:33,373 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) [2022-04-08 07:28:33,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-08 07:28:33,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-08 07:28:33,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 07:28:33,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-08 07:28:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 07:28:33,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 07:28:34,659 INFO L272 TraceCheckUtils]: 0: Hoare triple {1470#true} call ULTIMATE.init(); {1470#true} is VALID [2022-04-08 07:28:34,659 INFO L290 TraceCheckUtils]: 1: Hoare triple {1470#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {1470#true} is VALID [2022-04-08 07:28:34,660 INFO L290 TraceCheckUtils]: 2: Hoare triple {1470#true} assume true; {1470#true} is VALID [2022-04-08 07:28:34,660 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1470#true} {1470#true} #65#return; {1470#true} is VALID [2022-04-08 07:28:34,660 INFO L272 TraceCheckUtils]: 4: Hoare triple {1470#true} call #t~ret7 := main(); {1470#true} is VALID [2022-04-08 07:28:34,660 INFO L290 TraceCheckUtils]: 5: Hoare triple {1470#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {1470#true} is VALID [2022-04-08 07:28:34,660 INFO L272 TraceCheckUtils]: 6: Hoare triple {1470#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {1470#true} is VALID [2022-04-08 07:28:34,661 INFO L290 TraceCheckUtils]: 7: Hoare triple {1470#true} ~cond := #in~cond; {1496#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} is VALID [2022-04-08 07:28:34,661 INFO L290 TraceCheckUtils]: 8: Hoare triple {1496#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} assume !(0 == ~cond); {1500#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 07:28:34,661 INFO L290 TraceCheckUtils]: 9: Hoare triple {1500#(not (= |assume_abort_if_not_#in~cond| 0))} assume true; {1500#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 07:28:34,662 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {1500#(not (= |assume_abort_if_not_#in~cond| 0))} {1470#true} #59#return; {1507#(<= 1 main_~b~0)} is VALID [2022-04-08 07:28:34,663 INFO L290 TraceCheckUtils]: 11: Hoare triple {1507#(<= 1 main_~b~0)} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {1511#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:28:34,663 INFO L290 TraceCheckUtils]: 12: Hoare triple {1511#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1511#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:28:34,664 INFO L290 TraceCheckUtils]: 13: Hoare triple {1511#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} assume !!(#t~post6 < 100);havoc #t~post6; {1511#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:28:34,664 INFO L272 TraceCheckUtils]: 14: Hoare triple {1511#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {1470#true} is VALID [2022-04-08 07:28:34,664 INFO L290 TraceCheckUtils]: 15: Hoare triple {1470#true} ~cond := #in~cond; {1524#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:28:34,665 INFO L290 TraceCheckUtils]: 16: Hoare triple {1524#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {1528#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:28:34,665 INFO L290 TraceCheckUtils]: 17: Hoare triple {1528#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {1528#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:28:34,666 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {1528#(not (= |__VERIFIER_assert_#in~cond| 0))} {1511#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} #61#return; {1511#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:28:34,666 INFO L290 TraceCheckUtils]: 19: Hoare triple {1511#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} assume !!(0 != ~y~0); {1511#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:28:34,667 INFO L290 TraceCheckUtils]: 20: Hoare triple {1511#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {1541#(and (= main_~z~0 0) (not (= (mod main_~y~0 2) 1)) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:28:34,668 INFO L290 TraceCheckUtils]: 21: Hoare triple {1541#(and (= main_~z~0 0) (not (= (mod main_~y~0 2) 1)) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {1545#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:28:34,669 INFO L290 TraceCheckUtils]: 22: Hoare triple {1545#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1545#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:28:34,669 INFO L290 TraceCheckUtils]: 23: Hoare triple {1545#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} assume !!(#t~post6 < 100);havoc #t~post6; {1545#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:28:34,672 INFO L272 TraceCheckUtils]: 24: Hoare triple {1545#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {1555#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 07:28:34,672 INFO L290 TraceCheckUtils]: 25: Hoare triple {1555#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {1559#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:28:34,673 INFO L290 TraceCheckUtils]: 26: Hoare triple {1559#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {1471#false} is VALID [2022-04-08 07:28:34,673 INFO L290 TraceCheckUtils]: 27: Hoare triple {1471#false} assume !false; {1471#false} is VALID [2022-04-08 07:28:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 07:28:34,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-08 07:29:10,675 INFO L290 TraceCheckUtils]: 27: Hoare triple {1471#false} assume !false; {1471#false} is VALID [2022-04-08 07:29:10,676 INFO L290 TraceCheckUtils]: 26: Hoare triple {1559#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {1471#false} is VALID [2022-04-08 07:29:10,677 INFO L290 TraceCheckUtils]: 25: Hoare triple {1555#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {1559#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:29:10,677 INFO L272 TraceCheckUtils]: 24: Hoare triple {1575#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {1555#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 07:29:10,678 INFO L290 TraceCheckUtils]: 23: Hoare triple {1575#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} assume !!(#t~post6 < 100);havoc #t~post6; {1575#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:29:10,678 INFO L290 TraceCheckUtils]: 22: Hoare triple {1575#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1575#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:29:10,686 INFO L290 TraceCheckUtils]: 21: Hoare triple {1585#(and (or (not (< main_~y~0 0)) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (and (not (= (mod main_~y~0 2) 0)) (< main_~y~0 0))))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {1575#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:29:10,687 INFO L290 TraceCheckUtils]: 20: Hoare triple {1589#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {1585#(and (or (not (< main_~y~0 0)) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (and (not (= (mod main_~y~0 2) 0)) (< main_~y~0 0))))} is VALID [2022-04-08 07:29:10,687 INFO L290 TraceCheckUtils]: 19: Hoare triple {1589#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} assume !!(0 != ~y~0); {1589#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} is VALID [2022-04-08 07:29:10,690 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {1528#(not (= |__VERIFIER_assert_#in~cond| 0))} {1596#(or (<= 0 main_~y~0) (not (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0)))} #61#return; {1589#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} is VALID [2022-04-08 07:29:10,691 INFO L290 TraceCheckUtils]: 17: Hoare triple {1528#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {1528#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:29:10,691 INFO L290 TraceCheckUtils]: 16: Hoare triple {1606#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} assume !(0 == ~cond); {1528#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:29:10,692 INFO L290 TraceCheckUtils]: 15: Hoare triple {1470#true} ~cond := #in~cond; {1606#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-08 07:29:10,692 INFO L272 TraceCheckUtils]: 14: Hoare triple {1596#(or (<= 0 main_~y~0) (not (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0)))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {1470#true} is VALID [2022-04-08 07:29:10,693 INFO L290 TraceCheckUtils]: 13: Hoare triple {1596#(or (<= 0 main_~y~0) (not (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0)))} assume !!(#t~post6 < 100);havoc #t~post6; {1596#(or (<= 0 main_~y~0) (not (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0)))} is VALID [2022-04-08 07:29:10,694 INFO L290 TraceCheckUtils]: 12: Hoare triple {1596#(or (<= 0 main_~y~0) (not (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0)))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1596#(or (<= 0 main_~y~0) (not (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0)))} is VALID [2022-04-08 07:29:10,694 INFO L290 TraceCheckUtils]: 11: Hoare triple {1619#(or (= (* main_~b~0 main_~a~0) (* (* main_~a~0 2) (+ (div main_~b~0 2) 1))) (= (mod main_~b~0 2) 0) (<= 0 main_~b~0))} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {1596#(or (<= 0 main_~y~0) (not (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0)))} is VALID [2022-04-08 07:29:10,698 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {1500#(not (= |assume_abort_if_not_#in~cond| 0))} {1470#true} #59#return; {1619#(or (= (* main_~b~0 main_~a~0) (* (* main_~a~0 2) (+ (div main_~b~0 2) 1))) (= (mod main_~b~0 2) 0) (<= 0 main_~b~0))} is VALID [2022-04-08 07:29:10,699 INFO L290 TraceCheckUtils]: 9: Hoare triple {1500#(not (= |assume_abort_if_not_#in~cond| 0))} assume true; {1500#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 07:29:10,699 INFO L290 TraceCheckUtils]: 8: Hoare triple {1632#(or (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond 0))} assume !(0 == ~cond); {1500#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 07:29:10,700 INFO L290 TraceCheckUtils]: 7: Hoare triple {1470#true} ~cond := #in~cond; {1632#(or (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond 0))} is VALID [2022-04-08 07:29:10,700 INFO L272 TraceCheckUtils]: 6: Hoare triple {1470#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {1470#true} is VALID [2022-04-08 07:29:10,700 INFO L290 TraceCheckUtils]: 5: Hoare triple {1470#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {1470#true} is VALID [2022-04-08 07:29:10,700 INFO L272 TraceCheckUtils]: 4: Hoare triple {1470#true} call #t~ret7 := main(); {1470#true} is VALID [2022-04-08 07:29:10,700 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1470#true} {1470#true} #65#return; {1470#true} is VALID [2022-04-08 07:29:10,700 INFO L290 TraceCheckUtils]: 2: Hoare triple {1470#true} assume true; {1470#true} is VALID [2022-04-08 07:29:10,701 INFO L290 TraceCheckUtils]: 1: Hoare triple {1470#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {1470#true} is VALID [2022-04-08 07:29:10,701 INFO L272 TraceCheckUtils]: 0: Hoare triple {1470#true} call ULTIMATE.init(); {1470#true} is VALID [2022-04-08 07:29:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 07:29:10,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 07:29:10,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049196321] [2022-04-08 07:29:10,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 07:29:10,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013198198] [2022-04-08 07:29:10,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013198198] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-08 07:29:10,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-08 07:29:10,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2022-04-08 07:29:10,702 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 07:29:10,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1052287078] [2022-04-08 07:29:10,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1052287078] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:29:10,702 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:29:10,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-08 07:29:10,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034946413] [2022-04-08 07:29:10,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 07:29:10,703 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-04-08 07:29:10,703 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 07:29:10,703 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-08 07:29:10,729 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:29:10,729 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-08 07:29:10,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 07:29:10,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-08 07:29:10,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-04-08 07:29:10,730 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-08 07:29:11,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:29:11,338 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-04-08 07:29:11,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-08 07:29:11,338 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-04-08 07:29:11,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 07:29:11,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-08 07:29:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 55 transitions. [2022-04-08 07:29:11,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-08 07:29:11,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 55 transitions. [2022-04-08 07:29:11,342 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 12 states and 55 transitions. [2022-04-08 07:29:11,401 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 55 edges. 55 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:29:11,402 INFO L225 Difference]: With dead ends: 55 [2022-04-08 07:29:11,403 INFO L226 Difference]: Without dead ends: 48 [2022-04-08 07:29:11,403 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-04-08 07:29:11,404 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-08 07:29:11,404 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 114 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-08 07:29:11,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-08 07:29:11,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-04-08 07:29:11,448 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 07:29:11,448 INFO L82 GeneralOperation]: Start isEquivalent. First operand 48 states. Second operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:29:11,448 INFO L74 IsIncluded]: Start isIncluded. First operand 48 states. Second operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:29:11,449 INFO L87 Difference]: Start difference. First operand 48 states. Second operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:29:11,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:29:11,451 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-04-08 07:29:11,451 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-04-08 07:29:11,451 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:29:11,451 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:29:11,451 INFO L74 IsIncluded]: Start isIncluded. First operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand 48 states. [2022-04-08 07:29:11,452 INFO L87 Difference]: Start difference. First operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand 48 states. [2022-04-08 07:29:11,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:29:11,453 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-04-08 07:29:11,453 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-04-08 07:29:11,453 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:29:11,454 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:29:11,454 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 07:29:11,454 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 07:29:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:29:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-04-08 07:29:11,455 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 28 [2022-04-08 07:29:11,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 07:29:11,456 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-04-08 07:29:11,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-08 07:29:11,456 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 46 states and 50 transitions. [2022-04-08 07:29:11,511 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 50 edges. 50 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:29:11,511 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-04-08 07:29:11,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-08 07:29:11,511 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 07:29:11,512 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 07:29:11,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-08 07:29:11,712 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:29:11,712 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 07:29:11,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 07:29:11,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1395753147, now seen corresponding path program 1 times [2022-04-08 07:29:11,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 07:29:11,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [234671044] [2022-04-08 07:29:13,883 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-08 07:29:13,883 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-08 07:29:13,883 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 07:29:13,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1395753147, now seen corresponding path program 2 times [2022-04-08 07:29:13,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 07:29:13,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365225281] [2022-04-08 07:29:13,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 07:29:13,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 07:29:13,895 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 07:29:13,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838878077] [2022-04-08 07:29:13,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-08 07:29:13,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:29:13,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 07:29:13,899 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-08 07:29:13,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-08 07:29:13,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-08 07:29:13,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 07:29:13,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-08 07:29:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 07:29:13,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 07:29:20,320 INFO L272 TraceCheckUtils]: 0: Hoare triple {1960#true} call ULTIMATE.init(); {1960#true} is VALID [2022-04-08 07:29:20,321 INFO L290 TraceCheckUtils]: 1: Hoare triple {1960#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {1960#true} is VALID [2022-04-08 07:29:20,321 INFO L290 TraceCheckUtils]: 2: Hoare triple {1960#true} assume true; {1960#true} is VALID [2022-04-08 07:29:20,321 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1960#true} {1960#true} #65#return; {1960#true} is VALID [2022-04-08 07:29:20,321 INFO L272 TraceCheckUtils]: 4: Hoare triple {1960#true} call #t~ret7 := main(); {1960#true} is VALID [2022-04-08 07:29:20,321 INFO L290 TraceCheckUtils]: 5: Hoare triple {1960#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {1960#true} is VALID [2022-04-08 07:29:20,321 INFO L272 TraceCheckUtils]: 6: Hoare triple {1960#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {1960#true} is VALID [2022-04-08 07:29:20,322 INFO L290 TraceCheckUtils]: 7: Hoare triple {1960#true} ~cond := #in~cond; {1986#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} is VALID [2022-04-08 07:29:20,322 INFO L290 TraceCheckUtils]: 8: Hoare triple {1986#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} assume !(0 == ~cond); {1990#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 07:29:20,323 INFO L290 TraceCheckUtils]: 9: Hoare triple {1990#(not (= |assume_abort_if_not_#in~cond| 0))} assume true; {1990#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 07:29:20,324 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {1990#(not (= |assume_abort_if_not_#in~cond| 0))} {1960#true} #59#return; {1997#(<= 1 main_~b~0)} is VALID [2022-04-08 07:29:20,324 INFO L290 TraceCheckUtils]: 11: Hoare triple {1997#(<= 1 main_~b~0)} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {2001#(and (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:29:20,325 INFO L290 TraceCheckUtils]: 12: Hoare triple {2001#(and (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {2001#(and (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:29:20,325 INFO L290 TraceCheckUtils]: 13: Hoare triple {2001#(and (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} assume !!(#t~post6 < 100);havoc #t~post6; {2001#(and (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:29:20,325 INFO L272 TraceCheckUtils]: 14: Hoare triple {2001#(and (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {1960#true} is VALID [2022-04-08 07:29:20,326 INFO L290 TraceCheckUtils]: 15: Hoare triple {1960#true} ~cond := #in~cond; {2014#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:29:20,326 INFO L290 TraceCheckUtils]: 16: Hoare triple {2014#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {2018#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:29:20,326 INFO L290 TraceCheckUtils]: 17: Hoare triple {2018#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {2018#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:29:20,327 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {2018#(not (= |__VERIFIER_assert_#in~cond| 0))} {2001#(and (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} #61#return; {2025#(and (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:29:20,328 INFO L290 TraceCheckUtils]: 19: Hoare triple {2025#(and (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} assume !!(0 != ~y~0); {2025#(and (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:29:20,328 INFO L290 TraceCheckUtils]: 20: Hoare triple {2025#(and (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} assume 1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2);~z~0 := ~z~0 + ~x~0;~y~0 := ~y~0 - 1; {2032#(and (= main_~b~0 (+ main_~y~0 1)) (<= 1 (mod main_~b~0 2)) (= (+ main_~z~0 (* main_~b~0 main_~x~0)) (+ main_~x~0 (* main_~b~0 main_~a~0))) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:29:20,329 INFO L290 TraceCheckUtils]: 21: Hoare triple {2032#(and (= main_~b~0 (+ main_~y~0 1)) (<= 1 (mod main_~b~0 2)) (= (+ main_~z~0 (* main_~b~0 main_~x~0)) (+ main_~x~0 (* main_~b~0 main_~a~0))) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {2036#(and (= (+ main_~z~0 (* main_~b~0 main_~a~0)) (+ main_~a~0 (* main_~b~0 main_~a~0))) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (<= 1 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} is VALID [2022-04-08 07:29:20,330 INFO L290 TraceCheckUtils]: 22: Hoare triple {2036#(and (= (+ main_~z~0 (* main_~b~0 main_~a~0)) (+ main_~a~0 (* main_~b~0 main_~a~0))) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (<= 1 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {2036#(and (= (+ main_~z~0 (* main_~b~0 main_~a~0)) (+ main_~a~0 (* main_~b~0 main_~a~0))) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (<= 1 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} is VALID [2022-04-08 07:29:20,330 INFO L290 TraceCheckUtils]: 23: Hoare triple {2036#(and (= (+ main_~z~0 (* main_~b~0 main_~a~0)) (+ main_~a~0 (* main_~b~0 main_~a~0))) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (<= 1 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} assume !!(#t~post6 < 100);havoc #t~post6; {2036#(and (= (+ main_~z~0 (* main_~b~0 main_~a~0)) (+ main_~a~0 (* main_~b~0 main_~a~0))) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (<= 1 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} is VALID [2022-04-08 07:29:21,141 INFO L272 TraceCheckUtils]: 24: Hoare triple {2036#(and (= (+ main_~z~0 (* main_~b~0 main_~a~0)) (+ main_~a~0 (* main_~b~0 main_~a~0))) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (<= 1 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {2046#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 07:29:21,141 INFO L290 TraceCheckUtils]: 25: Hoare triple {2046#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {2050#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:29:21,142 INFO L290 TraceCheckUtils]: 26: Hoare triple {2050#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {1961#false} is VALID [2022-04-08 07:29:21,142 INFO L290 TraceCheckUtils]: 27: Hoare triple {1961#false} assume !false; {1961#false} is VALID [2022-04-08 07:29:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 07:29:21,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-08 07:30:32,248 INFO L290 TraceCheckUtils]: 27: Hoare triple {1961#false} assume !false; {1961#false} is VALID [2022-04-08 07:30:32,250 INFO L290 TraceCheckUtils]: 26: Hoare triple {2050#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {1961#false} is VALID [2022-04-08 07:30:32,250 INFO L290 TraceCheckUtils]: 25: Hoare triple {2046#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {2050#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:30:32,251 INFO L272 TraceCheckUtils]: 24: Hoare triple {2066#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {2046#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 07:30:32,252 INFO L290 TraceCheckUtils]: 23: Hoare triple {2066#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} assume !!(#t~post6 < 100);havoc #t~post6; {2066#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:30:32,252 INFO L290 TraceCheckUtils]: 22: Hoare triple {2066#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {2066#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:30:32,258 INFO L290 TraceCheckUtils]: 21: Hoare triple {2076#(and (or (not (< main_~y~0 0)) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (and (not (= (mod main_~y~0 2) 0)) (< main_~y~0 0))))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {2066#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:30:32,261 INFO L290 TraceCheckUtils]: 20: Hoare triple {2080#(or (= (+ (* (* main_~x~0 2) (div (+ (- 1) main_~y~0) 2)) main_~z~0 main_~x~0) (* main_~b~0 main_~a~0)) (not (<= 1 (mod main_~y~0 2))) (< main_~y~0 0))} assume 1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2);~z~0 := ~z~0 + ~x~0;~y~0 := ~y~0 - 1; {2076#(and (or (not (< main_~y~0 0)) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (and (not (= (mod main_~y~0 2) 0)) (< main_~y~0 0))))} is VALID [2022-04-08 07:30:32,262 INFO L290 TraceCheckUtils]: 19: Hoare triple {2080#(or (= (+ (* (* main_~x~0 2) (div (+ (- 1) main_~y~0) 2)) main_~z~0 main_~x~0) (* main_~b~0 main_~a~0)) (not (<= 1 (mod main_~y~0 2))) (< main_~y~0 0))} assume !!(0 != ~y~0); {2080#(or (= (+ (* (* main_~x~0 2) (div (+ (- 1) main_~y~0) 2)) main_~z~0 main_~x~0) (* main_~b~0 main_~a~0)) (not (<= 1 (mod main_~y~0 2))) (< main_~y~0 0))} is VALID [2022-04-08 07:30:32,685 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {2018#(not (= |__VERIFIER_assert_#in~cond| 0))} {1960#true} #61#return; {2080#(or (= (+ (* (* main_~x~0 2) (div (+ (- 1) main_~y~0) 2)) main_~z~0 main_~x~0) (* main_~b~0 main_~a~0)) (not (<= 1 (mod main_~y~0 2))) (< main_~y~0 0))} is VALID [2022-04-08 07:30:32,686 INFO L290 TraceCheckUtils]: 17: Hoare triple {2018#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {2018#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:30:32,686 INFO L290 TraceCheckUtils]: 16: Hoare triple {2096#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} assume !(0 == ~cond); {2018#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:30:32,687 INFO L290 TraceCheckUtils]: 15: Hoare triple {1960#true} ~cond := #in~cond; {2096#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-08 07:30:32,687 INFO L272 TraceCheckUtils]: 14: Hoare triple {1960#true} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {1960#true} is VALID [2022-04-08 07:30:32,687 INFO L290 TraceCheckUtils]: 13: Hoare triple {1960#true} assume !!(#t~post6 < 100);havoc #t~post6; {1960#true} is VALID [2022-04-08 07:30:32,687 INFO L290 TraceCheckUtils]: 12: Hoare triple {1960#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1960#true} is VALID [2022-04-08 07:30:32,687 INFO L290 TraceCheckUtils]: 11: Hoare triple {1960#true} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {1960#true} is VALID [2022-04-08 07:30:32,687 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {1960#true} {1960#true} #59#return; {1960#true} is VALID [2022-04-08 07:30:32,687 INFO L290 TraceCheckUtils]: 9: Hoare triple {1960#true} assume true; {1960#true} is VALID [2022-04-08 07:30:32,687 INFO L290 TraceCheckUtils]: 8: Hoare triple {1960#true} assume !(0 == ~cond); {1960#true} is VALID [2022-04-08 07:30:32,688 INFO L290 TraceCheckUtils]: 7: Hoare triple {1960#true} ~cond := #in~cond; {1960#true} is VALID [2022-04-08 07:30:32,688 INFO L272 TraceCheckUtils]: 6: Hoare triple {1960#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {1960#true} is VALID [2022-04-08 07:30:32,688 INFO L290 TraceCheckUtils]: 5: Hoare triple {1960#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {1960#true} is VALID [2022-04-08 07:30:32,688 INFO L272 TraceCheckUtils]: 4: Hoare triple {1960#true} call #t~ret7 := main(); {1960#true} is VALID [2022-04-08 07:30:32,688 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {1960#true} {1960#true} #65#return; {1960#true} is VALID [2022-04-08 07:30:32,688 INFO L290 TraceCheckUtils]: 2: Hoare triple {1960#true} assume true; {1960#true} is VALID [2022-04-08 07:30:32,688 INFO L290 TraceCheckUtils]: 1: Hoare triple {1960#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {1960#true} is VALID [2022-04-08 07:30:32,689 INFO L272 TraceCheckUtils]: 0: Hoare triple {1960#true} call ULTIMATE.init(); {1960#true} is VALID [2022-04-08 07:30:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 07:30:32,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 07:30:32,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365225281] [2022-04-08 07:30:32,689 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 07:30:32,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838878077] [2022-04-08 07:30:32,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838878077] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-08 07:30:32,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-08 07:30:32,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2022-04-08 07:30:32,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 07:30:32,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [234671044] [2022-04-08 07:30:32,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [234671044] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:30:32,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:30:32,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-08 07:30:32,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519427714] [2022-04-08 07:30:32,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 07:30:32,690 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-04-08 07:30:32,691 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 07:30:32,691 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-08 07:30:33,008 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 28 edges. 28 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:30:33,008 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-08 07:30:33,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 07:30:33,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-08 07:30:33,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-04-08 07:30:33,009 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-08 07:30:41,536 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 [] [2022-04-08 07:30:43,538 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 [] [2022-04-08 07:30:46,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:30:46,161 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2022-04-08 07:30:46,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-08 07:30:46,161 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-04-08 07:30:46,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 07:30:46,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-08 07:30:46,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 52 transitions. [2022-04-08 07:30:46,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-08 07:30:46,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 52 transitions. [2022-04-08 07:30:46,165 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 12 states and 52 transitions. [2022-04-08 07:30:46,452 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 52 edges. 52 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:30:46,454 INFO L225 Difference]: With dead ends: 57 [2022-04-08 07:30:46,454 INFO L226 Difference]: Without dead ends: 55 [2022-04-08 07:30:46,455 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-04-08 07:30:46,455 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-04-08 07:30:46,455 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 142 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 215 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2022-04-08 07:30:46,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-08 07:30:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-04-08 07:30:46,500 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 07:30:46,500 INFO L82 GeneralOperation]: Start isEquivalent. First operand 55 states. Second operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 07:30:46,500 INFO L74 IsIncluded]: Start isIncluded. First operand 55 states. Second operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 07:30:46,501 INFO L87 Difference]: Start difference. First operand 55 states. Second operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 07:30:46,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:30:46,502 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-04-08 07:30:46,503 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-04-08 07:30:46,503 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:30:46,503 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:30:46,503 INFO L74 IsIncluded]: Start isIncluded. First operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Second operand 55 states. [2022-04-08 07:30:46,503 INFO L87 Difference]: Start difference. First operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Second operand 55 states. [2022-04-08 07:30:46,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:30:46,505 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-04-08 07:30:46,505 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-04-08 07:30:46,505 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:30:46,506 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:30:46,506 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 07:30:46,506 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 07:30:46,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 38 states have internal predecessors, (41), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 07:30:46,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-04-08 07:30:46,508 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 28 [2022-04-08 07:30:46,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 07:30:46,508 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-04-08 07:30:46,508 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 11 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-08 07:30:46,508 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 51 states and 55 transitions. [2022-04-08 07:30:46,941 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 55 edges. 55 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:30:46,942 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-04-08 07:30:46,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-08 07:30:46,942 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 07:30:46,942 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 07:30:46,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-08 07:30:47,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:30:47,143 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 07:30:47,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 07:30:47,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1513703477, now seen corresponding path program 1 times [2022-04-08 07:30:47,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 07:30:47,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [944832961] [2022-04-08 07:30:48,179 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-08 07:30:48,179 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-08 07:30:48,179 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 07:30:48,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1513703477, now seen corresponding path program 2 times [2022-04-08 07:30:48,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 07:30:48,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208670032] [2022-04-08 07:30:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 07:30:48,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 07:30:48,189 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 07:30:48,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096790526] [2022-04-08 07:30:48,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-08 07:30:48,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:30:48,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 07:30:48,194 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-08 07:30:48,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-08 07:30:48,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-08 07:30:48,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 07:30:48,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-08 07:30:48,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 07:30:48,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 07:30:53,820 INFO L272 TraceCheckUtils]: 0: Hoare triple {2476#true} call ULTIMATE.init(); {2476#true} is VALID [2022-04-08 07:30:53,821 INFO L290 TraceCheckUtils]: 1: Hoare triple {2476#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {2476#true} is VALID [2022-04-08 07:30:53,821 INFO L290 TraceCheckUtils]: 2: Hoare triple {2476#true} assume true; {2476#true} is VALID [2022-04-08 07:30:53,821 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {2476#true} {2476#true} #65#return; {2476#true} is VALID [2022-04-08 07:30:53,821 INFO L272 TraceCheckUtils]: 4: Hoare triple {2476#true} call #t~ret7 := main(); {2476#true} is VALID [2022-04-08 07:30:53,821 INFO L290 TraceCheckUtils]: 5: Hoare triple {2476#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {2476#true} is VALID [2022-04-08 07:30:53,821 INFO L272 TraceCheckUtils]: 6: Hoare triple {2476#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {2476#true} is VALID [2022-04-08 07:30:53,822 INFO L290 TraceCheckUtils]: 7: Hoare triple {2476#true} ~cond := #in~cond; {2476#true} is VALID [2022-04-08 07:30:53,822 INFO L290 TraceCheckUtils]: 8: Hoare triple {2476#true} assume !(0 == ~cond); {2476#true} is VALID [2022-04-08 07:30:53,822 INFO L290 TraceCheckUtils]: 9: Hoare triple {2476#true} assume true; {2476#true} is VALID [2022-04-08 07:30:53,822 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {2476#true} {2476#true} #59#return; {2476#true} is VALID [2022-04-08 07:30:53,822 INFO L290 TraceCheckUtils]: 11: Hoare triple {2476#true} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {2476#true} is VALID [2022-04-08 07:30:53,822 INFO L290 TraceCheckUtils]: 12: Hoare triple {2476#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {2476#true} is VALID [2022-04-08 07:30:53,822 INFO L290 TraceCheckUtils]: 13: Hoare triple {2476#true} assume !!(#t~post6 < 100);havoc #t~post6; {2476#true} is VALID [2022-04-08 07:30:53,823 INFO L272 TraceCheckUtils]: 14: Hoare triple {2476#true} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {2476#true} is VALID [2022-04-08 07:30:53,823 INFO L290 TraceCheckUtils]: 15: Hoare triple {2476#true} ~cond := #in~cond; {2476#true} is VALID [2022-04-08 07:30:53,823 INFO L290 TraceCheckUtils]: 16: Hoare triple {2476#true} assume !(0 == ~cond); {2476#true} is VALID [2022-04-08 07:30:53,823 INFO L290 TraceCheckUtils]: 17: Hoare triple {2476#true} assume true; {2476#true} is VALID [2022-04-08 07:30:53,823 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {2476#true} {2476#true} #61#return; {2476#true} is VALID [2022-04-08 07:30:53,823 INFO L290 TraceCheckUtils]: 19: Hoare triple {2476#true} assume !!(0 != ~y~0); {2476#true} is VALID [2022-04-08 07:30:53,823 INFO L290 TraceCheckUtils]: 20: Hoare triple {2476#true} assume 1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2);~z~0 := ~z~0 + ~x~0;~y~0 := ~y~0 - 1; {2476#true} is VALID [2022-04-08 07:30:53,823 INFO L290 TraceCheckUtils]: 21: Hoare triple {2476#true} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {2476#true} is VALID [2022-04-08 07:30:53,824 INFO L290 TraceCheckUtils]: 22: Hoare triple {2476#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {2476#true} is VALID [2022-04-08 07:30:53,824 INFO L290 TraceCheckUtils]: 23: Hoare triple {2476#true} assume !!(#t~post6 < 100);havoc #t~post6; {2476#true} is VALID [2022-04-08 07:30:53,824 INFO L272 TraceCheckUtils]: 24: Hoare triple {2476#true} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {2476#true} is VALID [2022-04-08 07:30:53,824 INFO L290 TraceCheckUtils]: 25: Hoare triple {2476#true} ~cond := #in~cond; {2556#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:30:53,825 INFO L290 TraceCheckUtils]: 26: Hoare triple {2556#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {2560#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:30:53,825 INFO L290 TraceCheckUtils]: 27: Hoare triple {2560#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {2560#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:30:55,827 WARN L284 TraceCheckUtils]: 28: Hoare quadruple {2560#(not (= |__VERIFIER_assert_#in~cond| 0))} {2476#true} #61#return; {2567#(or (and (not (= main_~y~0 0)) (= (mod (+ (* (- 1) main_~z~0) (* main_~b~0 main_~a~0)) main_~y~0) 0)) (= (+ (* (- 1) main_~z~0) (* main_~b~0 main_~a~0)) 0))} is UNKNOWN [2022-04-08 07:30:55,828 INFO L290 TraceCheckUtils]: 29: Hoare triple {2567#(or (and (not (= main_~y~0 0)) (= (mod (+ (* (- 1) main_~z~0) (* main_~b~0 main_~a~0)) main_~y~0) 0)) (= (+ (* (- 1) main_~z~0) (* main_~b~0 main_~a~0)) 0))} assume !(0 != ~y~0); {2571#(= main_~z~0 (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:30:55,828 INFO L272 TraceCheckUtils]: 30: Hoare triple {2571#(= main_~z~0 (* main_~b~0 main_~a~0))} call __VERIFIER_assert((if ~z~0 == ~a~0 * ~b~0 then 1 else 0)); {2575#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 07:30:55,829 INFO L290 TraceCheckUtils]: 31: Hoare triple {2575#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {2579#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:30:55,829 INFO L290 TraceCheckUtils]: 32: Hoare triple {2579#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {2477#false} is VALID [2022-04-08 07:30:55,829 INFO L290 TraceCheckUtils]: 33: Hoare triple {2477#false} assume !false; {2477#false} is VALID [2022-04-08 07:30:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-08 07:30:55,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-08 07:31:02,109 INFO L290 TraceCheckUtils]: 33: Hoare triple {2477#false} assume !false; {2477#false} is VALID [2022-04-08 07:31:02,110 INFO L290 TraceCheckUtils]: 32: Hoare triple {2579#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {2477#false} is VALID [2022-04-08 07:31:02,110 INFO L290 TraceCheckUtils]: 31: Hoare triple {2575#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {2579#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:31:02,111 INFO L272 TraceCheckUtils]: 30: Hoare triple {2571#(= main_~z~0 (* main_~b~0 main_~a~0))} call __VERIFIER_assert((if ~z~0 == ~a~0 * ~b~0 then 1 else 0)); {2575#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 07:31:02,111 INFO L290 TraceCheckUtils]: 29: Hoare triple {2598#(or (not (= main_~y~0 0)) (= main_~z~0 (* main_~b~0 main_~a~0)))} assume !(0 != ~y~0); {2571#(= main_~z~0 (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:31:02,112 INFO L284 TraceCheckUtils]: 28: Hoare quadruple {2560#(not (= |__VERIFIER_assert_#in~cond| 0))} {2476#true} #61#return; {2598#(or (not (= main_~y~0 0)) (= main_~z~0 (* main_~b~0 main_~a~0)))} is VALID [2022-04-08 07:31:02,113 INFO L290 TraceCheckUtils]: 27: Hoare triple {2560#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {2560#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:31:02,113 INFO L290 TraceCheckUtils]: 26: Hoare triple {2611#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} assume !(0 == ~cond); {2560#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:31:02,114 INFO L290 TraceCheckUtils]: 25: Hoare triple {2476#true} ~cond := #in~cond; {2611#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-08 07:31:02,114 INFO L272 TraceCheckUtils]: 24: Hoare triple {2476#true} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {2476#true} is VALID [2022-04-08 07:31:02,114 INFO L290 TraceCheckUtils]: 23: Hoare triple {2476#true} assume !!(#t~post6 < 100);havoc #t~post6; {2476#true} is VALID [2022-04-08 07:31:02,114 INFO L290 TraceCheckUtils]: 22: Hoare triple {2476#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {2476#true} is VALID [2022-04-08 07:31:02,114 INFO L290 TraceCheckUtils]: 21: Hoare triple {2476#true} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {2476#true} is VALID [2022-04-08 07:31:02,114 INFO L290 TraceCheckUtils]: 20: Hoare triple {2476#true} assume 1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2);~z~0 := ~z~0 + ~x~0;~y~0 := ~y~0 - 1; {2476#true} is VALID [2022-04-08 07:31:02,114 INFO L290 TraceCheckUtils]: 19: Hoare triple {2476#true} assume !!(0 != ~y~0); {2476#true} is VALID [2022-04-08 07:31:02,114 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {2476#true} {2476#true} #61#return; {2476#true} is VALID [2022-04-08 07:31:02,115 INFO L290 TraceCheckUtils]: 17: Hoare triple {2476#true} assume true; {2476#true} is VALID [2022-04-08 07:31:02,115 INFO L290 TraceCheckUtils]: 16: Hoare triple {2476#true} assume !(0 == ~cond); {2476#true} is VALID [2022-04-08 07:31:02,115 INFO L290 TraceCheckUtils]: 15: Hoare triple {2476#true} ~cond := #in~cond; {2476#true} is VALID [2022-04-08 07:31:02,115 INFO L272 TraceCheckUtils]: 14: Hoare triple {2476#true} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {2476#true} is VALID [2022-04-08 07:31:02,115 INFO L290 TraceCheckUtils]: 13: Hoare triple {2476#true} assume !!(#t~post6 < 100);havoc #t~post6; {2476#true} is VALID [2022-04-08 07:31:02,115 INFO L290 TraceCheckUtils]: 12: Hoare triple {2476#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {2476#true} is VALID [2022-04-08 07:31:02,115 INFO L290 TraceCheckUtils]: 11: Hoare triple {2476#true} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {2476#true} is VALID [2022-04-08 07:31:02,115 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {2476#true} {2476#true} #59#return; {2476#true} is VALID [2022-04-08 07:31:02,116 INFO L290 TraceCheckUtils]: 9: Hoare triple {2476#true} assume true; {2476#true} is VALID [2022-04-08 07:31:02,116 INFO L290 TraceCheckUtils]: 8: Hoare triple {2476#true} assume !(0 == ~cond); {2476#true} is VALID [2022-04-08 07:31:02,116 INFO L290 TraceCheckUtils]: 7: Hoare triple {2476#true} ~cond := #in~cond; {2476#true} is VALID [2022-04-08 07:31:02,116 INFO L272 TraceCheckUtils]: 6: Hoare triple {2476#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {2476#true} is VALID [2022-04-08 07:31:02,116 INFO L290 TraceCheckUtils]: 5: Hoare triple {2476#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {2476#true} is VALID [2022-04-08 07:31:02,116 INFO L272 TraceCheckUtils]: 4: Hoare triple {2476#true} call #t~ret7 := main(); {2476#true} is VALID [2022-04-08 07:31:02,116 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {2476#true} {2476#true} #65#return; {2476#true} is VALID [2022-04-08 07:31:02,116 INFO L290 TraceCheckUtils]: 2: Hoare triple {2476#true} assume true; {2476#true} is VALID [2022-04-08 07:31:02,117 INFO L290 TraceCheckUtils]: 1: Hoare triple {2476#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {2476#true} is VALID [2022-04-08 07:31:02,117 INFO L272 TraceCheckUtils]: 0: Hoare triple {2476#true} call ULTIMATE.init(); {2476#true} is VALID [2022-04-08 07:31:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-08 07:31:02,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 07:31:02,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208670032] [2022-04-08 07:31:02,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 07:31:02,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096790526] [2022-04-08 07:31:02,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096790526] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-08 07:31:02,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-08 07:31:02,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-08 07:31:02,118 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 07:31:02,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [944832961] [2022-04-08 07:31:02,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [944832961] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:31:02,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:31:02,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-08 07:31:02,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229913859] [2022-04-08 07:31:02,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 07:31:02,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-04-08 07:31:02,119 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 07:31:02,119 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-08 07:31:04,144 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 31 edges. 30 inductive. 0 not inductive. 1 times theorem prover too weak to decide inductivity. [2022-04-08 07:31:04,145 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-08 07:31:04,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 07:31:04,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-08 07:31:04,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-08 07:31:04,145 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-08 07:31:06,181 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 [] [2022-04-08 07:31:06,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:31:06,674 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2022-04-08 07:31:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-08 07:31:06,674 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-04-08 07:31:06,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 07:31:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-08 07:31:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 35 transitions. [2022-04-08 07:31:06,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-08 07:31:06,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 35 transitions. [2022-04-08 07:31:06,677 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 8 states and 35 transitions. [2022-04-08 07:31:08,703 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 35 edges. 34 inductive. 0 not inductive. 1 times theorem prover too weak to decide inductivity. [2022-04-08 07:31:08,705 INFO L225 Difference]: With dead ends: 59 [2022-04-08 07:31:08,705 INFO L226 Difference]: Without dead ends: 52 [2022-04-08 07:31:08,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-08 07:31:08,706 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-08 07:31:08,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 103 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-04-08 07:31:08,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-08 07:31:08,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-04-08 07:31:08,758 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 07:31:08,758 INFO L82 GeneralOperation]: Start isEquivalent. First operand 52 states. Second operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:31:08,759 INFO L74 IsIncluded]: Start isIncluded. First operand 52 states. Second operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:31:08,759 INFO L87 Difference]: Start difference. First operand 52 states. Second operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:31:08,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:31:08,761 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2022-04-08 07:31:08,761 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-04-08 07:31:08,761 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:31:08,761 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:31:08,763 INFO L74 IsIncluded]: Start isIncluded. First operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand 52 states. [2022-04-08 07:31:08,763 INFO L87 Difference]: Start difference. First operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand 52 states. [2022-04-08 07:31:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:31:08,765 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2022-04-08 07:31:08,765 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-04-08 07:31:08,766 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:31:08,766 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:31:08,766 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 07:31:08,766 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 07:31:08,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:31:08,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-04-08 07:31:08,768 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2022-04-08 07:31:08,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 07:31:08,768 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-04-08 07:31:08,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-08 07:31:08,769 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 42 states and 45 transitions. [2022-04-08 07:31:15,227 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 45 edges. 42 inductive. 0 not inductive. 3 times theorem prover too weak to decide inductivity. [2022-04-08 07:31:15,227 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-04-08 07:31:15,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-08 07:31:15,228 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 07:31:15,228 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 07:31:15,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-08 07:31:15,431 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:31:15,432 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 07:31:15,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 07:31:15,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1456887472, now seen corresponding path program 3 times [2022-04-08 07:31:15,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 07:31:15,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [220818417] [2022-04-08 07:31:17,770 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-08 07:31:17,770 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-08 07:31:17,770 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 07:31:17,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1456887472, now seen corresponding path program 4 times [2022-04-08 07:31:17,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 07:31:17,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252753985] [2022-04-08 07:31:17,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 07:31:17,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 07:31:17,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 07:31:17,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251045588] [2022-04-08 07:31:17,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-08 07:31:17,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:31:17,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 07:31:17,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-08 07:31:17,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-08 07:31:17,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-08 07:31:17,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 07:31:17,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-08 07:31:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 07:31:17,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 07:31:18,003 INFO L272 TraceCheckUtils]: 0: Hoare triple {2999#true} call ULTIMATE.init(); {2999#true} is VALID [2022-04-08 07:31:18,004 INFO L290 TraceCheckUtils]: 1: Hoare triple {2999#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {3007#(<= ~counter~0 0)} is VALID [2022-04-08 07:31:18,004 INFO L290 TraceCheckUtils]: 2: Hoare triple {3007#(<= ~counter~0 0)} assume true; {3007#(<= ~counter~0 0)} is VALID [2022-04-08 07:31:18,004 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {3007#(<= ~counter~0 0)} {2999#true} #65#return; {3007#(<= ~counter~0 0)} is VALID [2022-04-08 07:31:18,005 INFO L272 TraceCheckUtils]: 4: Hoare triple {3007#(<= ~counter~0 0)} call #t~ret7 := main(); {3007#(<= ~counter~0 0)} is VALID [2022-04-08 07:31:18,005 INFO L290 TraceCheckUtils]: 5: Hoare triple {3007#(<= ~counter~0 0)} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {3007#(<= ~counter~0 0)} is VALID [2022-04-08 07:31:18,005 INFO L272 TraceCheckUtils]: 6: Hoare triple {3007#(<= ~counter~0 0)} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {3007#(<= ~counter~0 0)} is VALID [2022-04-08 07:31:18,006 INFO L290 TraceCheckUtils]: 7: Hoare triple {3007#(<= ~counter~0 0)} ~cond := #in~cond; {3007#(<= ~counter~0 0)} is VALID [2022-04-08 07:31:18,006 INFO L290 TraceCheckUtils]: 8: Hoare triple {3007#(<= ~counter~0 0)} assume !(0 == ~cond); {3007#(<= ~counter~0 0)} is VALID [2022-04-08 07:31:18,006 INFO L290 TraceCheckUtils]: 9: Hoare triple {3007#(<= ~counter~0 0)} assume true; {3007#(<= ~counter~0 0)} is VALID [2022-04-08 07:31:18,007 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {3007#(<= ~counter~0 0)} {3007#(<= ~counter~0 0)} #59#return; {3007#(<= ~counter~0 0)} is VALID [2022-04-08 07:31:18,007 INFO L290 TraceCheckUtils]: 11: Hoare triple {3007#(<= ~counter~0 0)} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {3007#(<= ~counter~0 0)} is VALID [2022-04-08 07:31:18,007 INFO L290 TraceCheckUtils]: 12: Hoare triple {3007#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {3041#(<= ~counter~0 1)} is VALID [2022-04-08 07:31:18,008 INFO L290 TraceCheckUtils]: 13: Hoare triple {3041#(<= ~counter~0 1)} assume !!(#t~post6 < 100);havoc #t~post6; {3041#(<= ~counter~0 1)} is VALID [2022-04-08 07:31:18,008 INFO L272 TraceCheckUtils]: 14: Hoare triple {3041#(<= ~counter~0 1)} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {3041#(<= ~counter~0 1)} is VALID [2022-04-08 07:31:18,009 INFO L290 TraceCheckUtils]: 15: Hoare triple {3041#(<= ~counter~0 1)} ~cond := #in~cond; {3041#(<= ~counter~0 1)} is VALID [2022-04-08 07:31:18,009 INFO L290 TraceCheckUtils]: 16: Hoare triple {3041#(<= ~counter~0 1)} assume !(0 == ~cond); {3041#(<= ~counter~0 1)} is VALID [2022-04-08 07:31:18,009 INFO L290 TraceCheckUtils]: 17: Hoare triple {3041#(<= ~counter~0 1)} assume true; {3041#(<= ~counter~0 1)} is VALID [2022-04-08 07:31:18,010 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {3041#(<= ~counter~0 1)} {3041#(<= ~counter~0 1)} #61#return; {3041#(<= ~counter~0 1)} is VALID [2022-04-08 07:31:18,010 INFO L290 TraceCheckUtils]: 19: Hoare triple {3041#(<= ~counter~0 1)} assume !!(0 != ~y~0); {3041#(<= ~counter~0 1)} is VALID [2022-04-08 07:31:18,010 INFO L290 TraceCheckUtils]: 20: Hoare triple {3041#(<= ~counter~0 1)} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {3041#(<= ~counter~0 1)} is VALID [2022-04-08 07:31:18,011 INFO L290 TraceCheckUtils]: 21: Hoare triple {3041#(<= ~counter~0 1)} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {3041#(<= ~counter~0 1)} is VALID [2022-04-08 07:31:18,011 INFO L290 TraceCheckUtils]: 22: Hoare triple {3041#(<= ~counter~0 1)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {3072#(<= ~counter~0 2)} is VALID [2022-04-08 07:31:18,011 INFO L290 TraceCheckUtils]: 23: Hoare triple {3072#(<= ~counter~0 2)} assume !!(#t~post6 < 100);havoc #t~post6; {3072#(<= ~counter~0 2)} is VALID [2022-04-08 07:31:18,012 INFO L272 TraceCheckUtils]: 24: Hoare triple {3072#(<= ~counter~0 2)} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {3072#(<= ~counter~0 2)} is VALID [2022-04-08 07:31:18,012 INFO L290 TraceCheckUtils]: 25: Hoare triple {3072#(<= ~counter~0 2)} ~cond := #in~cond; {3072#(<= ~counter~0 2)} is VALID [2022-04-08 07:31:18,013 INFO L290 TraceCheckUtils]: 26: Hoare triple {3072#(<= ~counter~0 2)} assume !(0 == ~cond); {3072#(<= ~counter~0 2)} is VALID [2022-04-08 07:31:18,013 INFO L290 TraceCheckUtils]: 27: Hoare triple {3072#(<= ~counter~0 2)} assume true; {3072#(<= ~counter~0 2)} is VALID [2022-04-08 07:31:18,013 INFO L284 TraceCheckUtils]: 28: Hoare quadruple {3072#(<= ~counter~0 2)} {3072#(<= ~counter~0 2)} #61#return; {3072#(<= ~counter~0 2)} is VALID [2022-04-08 07:31:18,014 INFO L290 TraceCheckUtils]: 29: Hoare triple {3072#(<= ~counter~0 2)} assume !!(0 != ~y~0); {3072#(<= ~counter~0 2)} is VALID [2022-04-08 07:31:18,014 INFO L290 TraceCheckUtils]: 30: Hoare triple {3072#(<= ~counter~0 2)} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {3072#(<= ~counter~0 2)} is VALID [2022-04-08 07:31:18,014 INFO L290 TraceCheckUtils]: 31: Hoare triple {3072#(<= ~counter~0 2)} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {3072#(<= ~counter~0 2)} is VALID [2022-04-08 07:31:18,015 INFO L290 TraceCheckUtils]: 32: Hoare triple {3072#(<= ~counter~0 2)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {3103#(<= |main_#t~post6| 2)} is VALID [2022-04-08 07:31:18,015 INFO L290 TraceCheckUtils]: 33: Hoare triple {3103#(<= |main_#t~post6| 2)} assume !(#t~post6 < 100);havoc #t~post6; {3000#false} is VALID [2022-04-08 07:31:18,015 INFO L272 TraceCheckUtils]: 34: Hoare triple {3000#false} call __VERIFIER_assert((if ~z~0 == ~a~0 * ~b~0 then 1 else 0)); {3000#false} is VALID [2022-04-08 07:31:18,015 INFO L290 TraceCheckUtils]: 35: Hoare triple {3000#false} ~cond := #in~cond; {3000#false} is VALID [2022-04-08 07:31:18,015 INFO L290 TraceCheckUtils]: 36: Hoare triple {3000#false} assume 0 == ~cond; {3000#false} is VALID [2022-04-08 07:31:18,015 INFO L290 TraceCheckUtils]: 37: Hoare triple {3000#false} assume !false; {3000#false} is VALID [2022-04-08 07:31:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 07:31:18,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-08 07:31:18,203 INFO L290 TraceCheckUtils]: 37: Hoare triple {3000#false} assume !false; {3000#false} is VALID [2022-04-08 07:31:18,203 INFO L290 TraceCheckUtils]: 36: Hoare triple {3000#false} assume 0 == ~cond; {3000#false} is VALID [2022-04-08 07:31:18,203 INFO L290 TraceCheckUtils]: 35: Hoare triple {3000#false} ~cond := #in~cond; {3000#false} is VALID [2022-04-08 07:31:18,204 INFO L272 TraceCheckUtils]: 34: Hoare triple {3000#false} call __VERIFIER_assert((if ~z~0 == ~a~0 * ~b~0 then 1 else 0)); {3000#false} is VALID [2022-04-08 07:31:18,204 INFO L290 TraceCheckUtils]: 33: Hoare triple {3131#(< |main_#t~post6| 100)} assume !(#t~post6 < 100);havoc #t~post6; {3000#false} is VALID [2022-04-08 07:31:18,204 INFO L290 TraceCheckUtils]: 32: Hoare triple {3135#(< ~counter~0 100)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {3131#(< |main_#t~post6| 100)} is VALID [2022-04-08 07:31:18,205 INFO L290 TraceCheckUtils]: 31: Hoare triple {3135#(< ~counter~0 100)} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {3135#(< ~counter~0 100)} is VALID [2022-04-08 07:31:18,205 INFO L290 TraceCheckUtils]: 30: Hoare triple {3135#(< ~counter~0 100)} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {3135#(< ~counter~0 100)} is VALID [2022-04-08 07:31:18,205 INFO L290 TraceCheckUtils]: 29: Hoare triple {3135#(< ~counter~0 100)} assume !!(0 != ~y~0); {3135#(< ~counter~0 100)} is VALID [2022-04-08 07:31:18,206 INFO L284 TraceCheckUtils]: 28: Hoare quadruple {2999#true} {3135#(< ~counter~0 100)} #61#return; {3135#(< ~counter~0 100)} is VALID [2022-04-08 07:31:18,206 INFO L290 TraceCheckUtils]: 27: Hoare triple {2999#true} assume true; {2999#true} is VALID [2022-04-08 07:31:18,206 INFO L290 TraceCheckUtils]: 26: Hoare triple {2999#true} assume !(0 == ~cond); {2999#true} is VALID [2022-04-08 07:31:18,206 INFO L290 TraceCheckUtils]: 25: Hoare triple {2999#true} ~cond := #in~cond; {2999#true} is VALID [2022-04-08 07:31:18,206 INFO L272 TraceCheckUtils]: 24: Hoare triple {3135#(< ~counter~0 100)} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {2999#true} is VALID [2022-04-08 07:31:18,207 INFO L290 TraceCheckUtils]: 23: Hoare triple {3135#(< ~counter~0 100)} assume !!(#t~post6 < 100);havoc #t~post6; {3135#(< ~counter~0 100)} is VALID [2022-04-08 07:31:18,207 INFO L290 TraceCheckUtils]: 22: Hoare triple {3166#(< ~counter~0 99)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {3135#(< ~counter~0 100)} is VALID [2022-04-08 07:31:18,207 INFO L290 TraceCheckUtils]: 21: Hoare triple {3166#(< ~counter~0 99)} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {3166#(< ~counter~0 99)} is VALID [2022-04-08 07:31:18,208 INFO L290 TraceCheckUtils]: 20: Hoare triple {3166#(< ~counter~0 99)} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {3166#(< ~counter~0 99)} is VALID [2022-04-08 07:31:18,208 INFO L290 TraceCheckUtils]: 19: Hoare triple {3166#(< ~counter~0 99)} assume !!(0 != ~y~0); {3166#(< ~counter~0 99)} is VALID [2022-04-08 07:31:18,209 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {2999#true} {3166#(< ~counter~0 99)} #61#return; {3166#(< ~counter~0 99)} is VALID [2022-04-08 07:31:18,209 INFO L290 TraceCheckUtils]: 17: Hoare triple {2999#true} assume true; {2999#true} is VALID [2022-04-08 07:31:18,209 INFO L290 TraceCheckUtils]: 16: Hoare triple {2999#true} assume !(0 == ~cond); {2999#true} is VALID [2022-04-08 07:31:18,210 INFO L290 TraceCheckUtils]: 15: Hoare triple {2999#true} ~cond := #in~cond; {2999#true} is VALID [2022-04-08 07:31:18,210 INFO L272 TraceCheckUtils]: 14: Hoare triple {3166#(< ~counter~0 99)} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {2999#true} is VALID [2022-04-08 07:31:18,210 INFO L290 TraceCheckUtils]: 13: Hoare triple {3166#(< ~counter~0 99)} assume !!(#t~post6 < 100);havoc #t~post6; {3166#(< ~counter~0 99)} is VALID [2022-04-08 07:31:18,211 INFO L290 TraceCheckUtils]: 12: Hoare triple {3197#(< ~counter~0 98)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {3166#(< ~counter~0 99)} is VALID [2022-04-08 07:31:18,211 INFO L290 TraceCheckUtils]: 11: Hoare triple {3197#(< ~counter~0 98)} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {3197#(< ~counter~0 98)} is VALID [2022-04-08 07:31:18,212 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {2999#true} {3197#(< ~counter~0 98)} #59#return; {3197#(< ~counter~0 98)} is VALID [2022-04-08 07:31:18,212 INFO L290 TraceCheckUtils]: 9: Hoare triple {2999#true} assume true; {2999#true} is VALID [2022-04-08 07:31:18,212 INFO L290 TraceCheckUtils]: 8: Hoare triple {2999#true} assume !(0 == ~cond); {2999#true} is VALID [2022-04-08 07:31:18,212 INFO L290 TraceCheckUtils]: 7: Hoare triple {2999#true} ~cond := #in~cond; {2999#true} is VALID [2022-04-08 07:31:18,212 INFO L272 TraceCheckUtils]: 6: Hoare triple {3197#(< ~counter~0 98)} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {2999#true} is VALID [2022-04-08 07:31:18,212 INFO L290 TraceCheckUtils]: 5: Hoare triple {3197#(< ~counter~0 98)} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {3197#(< ~counter~0 98)} is VALID [2022-04-08 07:31:18,213 INFO L272 TraceCheckUtils]: 4: Hoare triple {3197#(< ~counter~0 98)} call #t~ret7 := main(); {3197#(< ~counter~0 98)} is VALID [2022-04-08 07:31:18,213 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {3197#(< ~counter~0 98)} {2999#true} #65#return; {3197#(< ~counter~0 98)} is VALID [2022-04-08 07:31:18,213 INFO L290 TraceCheckUtils]: 2: Hoare triple {3197#(< ~counter~0 98)} assume true; {3197#(< ~counter~0 98)} is VALID [2022-04-08 07:31:18,214 INFO L290 TraceCheckUtils]: 1: Hoare triple {2999#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {3197#(< ~counter~0 98)} is VALID [2022-04-08 07:31:18,214 INFO L272 TraceCheckUtils]: 0: Hoare triple {2999#true} call ULTIMATE.init(); {2999#true} is VALID [2022-04-08 07:31:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-08 07:31:18,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 07:31:18,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252753985] [2022-04-08 07:31:18,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 07:31:18,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251045588] [2022-04-08 07:31:18,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251045588] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-08 07:31:18,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-08 07:31:18,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-04-08 07:31:18,215 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 07:31:18,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [220818417] [2022-04-08 07:31:18,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [220818417] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:31:18,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:31:18,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-08 07:31:18,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769521337] [2022-04-08 07:31:18,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 07:31:18,216 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2022-04-08 07:31:18,216 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 07:31:18,216 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 07:31:18,241 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 38 edges. 38 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:31:18,241 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-08 07:31:18,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 07:31:18,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-08 07:31:18,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-04-08 07:31:18,242 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 07:31:18,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:31:18,379 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2022-04-08 07:31:18,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-08 07:31:18,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2022-04-08 07:31:18,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 07:31:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 07:31:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 58 transitions. [2022-04-08 07:31:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 07:31:18,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 58 transitions. [2022-04-08 07:31:18,384 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 8 states and 58 transitions. [2022-04-08 07:31:18,432 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 58 edges. 58 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:31:18,433 INFO L225 Difference]: With dead ends: 54 [2022-04-08 07:31:18,433 INFO L226 Difference]: Without dead ends: 47 [2022-04-08 07:31:18,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-04-08 07:31:18,434 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-08 07:31:18,434 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 87 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-08 07:31:18,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-08 07:31:18,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-04-08 07:31:18,498 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 07:31:18,498 INFO L82 GeneralOperation]: Start isEquivalent. First operand 47 states. Second operand has 47 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:31:18,498 INFO L74 IsIncluded]: Start isIncluded. First operand 47 states. Second operand has 47 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:31:18,499 INFO L87 Difference]: Start difference. First operand 47 states. Second operand has 47 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:31:18,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:31:18,500 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2022-04-08 07:31:18,500 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-04-08 07:31:18,500 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:31:18,500 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:31:18,501 INFO L74 IsIncluded]: Start isIncluded. First operand has 47 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand 47 states. [2022-04-08 07:31:18,501 INFO L87 Difference]: Start difference. First operand has 47 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand 47 states. [2022-04-08 07:31:18,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:31:18,502 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2022-04-08 07:31:18,502 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-04-08 07:31:18,503 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:31:18,503 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:31:18,503 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 07:31:18,503 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 07:31:18,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:31:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-04-08 07:31:18,504 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 38 [2022-04-08 07:31:18,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 07:31:18,505 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-04-08 07:31:18,505 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-08 07:31:18,505 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 47 states and 51 transitions. [2022-04-08 07:31:24,623 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 51 edges. 48 inductive. 0 not inductive. 3 times theorem prover too weak to decide inductivity. [2022-04-08 07:31:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-04-08 07:31:24,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-08 07:31:24,624 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 07:31:24,624 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 07:31:24,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-08 07:31:24,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-08 07:31:24,827 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 07:31:24,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 07:31:24,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1455100012, now seen corresponding path program 3 times [2022-04-08 07:31:24,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 07:31:24,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1775917487] [2022-04-08 07:31:28,875 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-08 07:31:28,876 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-08 07:31:28,876 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 07:31:28,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1455100012, now seen corresponding path program 4 times [2022-04-08 07:31:28,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 07:31:28,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797071719] [2022-04-08 07:31:28,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 07:31:28,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 07:31:28,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 07:31:28,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138898698] [2022-04-08 07:31:28,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-08 07:31:28,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:31:28,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 07:31:28,891 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-08 07:31:28,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-08 07:31:28,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-08 07:31:28,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 07:31:28,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-08 07:31:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 07:31:28,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 07:31:35,670 INFO L272 TraceCheckUtils]: 0: Hoare triple {3536#true} call ULTIMATE.init(); {3536#true} is VALID [2022-04-08 07:31:35,671 INFO L290 TraceCheckUtils]: 1: Hoare triple {3536#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {3536#true} is VALID [2022-04-08 07:31:35,671 INFO L290 TraceCheckUtils]: 2: Hoare triple {3536#true} assume true; {3536#true} is VALID [2022-04-08 07:31:35,671 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {3536#true} {3536#true} #65#return; {3536#true} is VALID [2022-04-08 07:31:35,671 INFO L272 TraceCheckUtils]: 4: Hoare triple {3536#true} call #t~ret7 := main(); {3536#true} is VALID [2022-04-08 07:31:35,671 INFO L290 TraceCheckUtils]: 5: Hoare triple {3536#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {3536#true} is VALID [2022-04-08 07:31:35,671 INFO L272 TraceCheckUtils]: 6: Hoare triple {3536#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {3536#true} is VALID [2022-04-08 07:31:35,671 INFO L290 TraceCheckUtils]: 7: Hoare triple {3536#true} ~cond := #in~cond; {3562#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} is VALID [2022-04-08 07:31:35,672 INFO L290 TraceCheckUtils]: 8: Hoare triple {3562#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} assume !(0 == ~cond); {3566#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 07:31:35,672 INFO L290 TraceCheckUtils]: 9: Hoare triple {3566#(not (= |assume_abort_if_not_#in~cond| 0))} assume true; {3566#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 07:31:35,673 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {3566#(not (= |assume_abort_if_not_#in~cond| 0))} {3536#true} #59#return; {3573#(<= 1 main_~b~0)} is VALID [2022-04-08 07:31:35,673 INFO L290 TraceCheckUtils]: 11: Hoare triple {3573#(<= 1 main_~b~0)} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {3577#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:31:35,673 INFO L290 TraceCheckUtils]: 12: Hoare triple {3577#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {3577#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:31:35,674 INFO L290 TraceCheckUtils]: 13: Hoare triple {3577#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} assume !!(#t~post6 < 100);havoc #t~post6; {3577#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:31:35,674 INFO L272 TraceCheckUtils]: 14: Hoare triple {3577#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {3536#true} is VALID [2022-04-08 07:31:35,674 INFO L290 TraceCheckUtils]: 15: Hoare triple {3536#true} ~cond := #in~cond; {3536#true} is VALID [2022-04-08 07:31:35,674 INFO L290 TraceCheckUtils]: 16: Hoare triple {3536#true} assume !(0 == ~cond); {3536#true} is VALID [2022-04-08 07:31:35,674 INFO L290 TraceCheckUtils]: 17: Hoare triple {3536#true} assume true; {3536#true} is VALID [2022-04-08 07:31:35,675 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {3536#true} {3577#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} #61#return; {3577#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:31:35,681 INFO L290 TraceCheckUtils]: 19: Hoare triple {3577#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} assume !!(0 != ~y~0); {3577#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:31:35,681 INFO L290 TraceCheckUtils]: 20: Hoare triple {3577#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {3605#(and (= main_~z~0 0) (not (= (mod main_~y~0 2) 1)) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:31:35,682 INFO L290 TraceCheckUtils]: 21: Hoare triple {3605#(and (= main_~z~0 0) (not (= (mod main_~y~0 2) 1)) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {3609#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:31:35,683 INFO L290 TraceCheckUtils]: 22: Hoare triple {3609#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {3609#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:31:35,683 INFO L290 TraceCheckUtils]: 23: Hoare triple {3609#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} assume !!(#t~post6 < 100);havoc #t~post6; {3609#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:31:35,683 INFO L272 TraceCheckUtils]: 24: Hoare triple {3609#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {3536#true} is VALID [2022-04-08 07:31:35,683 INFO L290 TraceCheckUtils]: 25: Hoare triple {3536#true} ~cond := #in~cond; {3536#true} is VALID [2022-04-08 07:31:35,683 INFO L290 TraceCheckUtils]: 26: Hoare triple {3536#true} assume !(0 == ~cond); {3536#true} is VALID [2022-04-08 07:31:35,683 INFO L290 TraceCheckUtils]: 27: Hoare triple {3536#true} assume true; {3536#true} is VALID [2022-04-08 07:31:35,684 INFO L284 TraceCheckUtils]: 28: Hoare quadruple {3536#true} {3609#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} #61#return; {3609#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:31:35,684 INFO L290 TraceCheckUtils]: 29: Hoare triple {3609#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} assume !!(0 != ~y~0); {3609#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:31:35,685 INFO L290 TraceCheckUtils]: 30: Hoare triple {3609#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {3637#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (not (= (mod main_~y~0 2) 1)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:31:35,686 INFO L290 TraceCheckUtils]: 31: Hoare triple {3637#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (not (= (mod main_~y~0 2) 1)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {3641#(and (= main_~z~0 0) (= (* main_~a~0 4) main_~x~0) (not (= (mod (div main_~b~0 2) 2) 1)) (= main_~y~0 (div (div main_~b~0 2) 2)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:31:35,687 INFO L290 TraceCheckUtils]: 32: Hoare triple {3641#(and (= main_~z~0 0) (= (* main_~a~0 4) main_~x~0) (not (= (mod (div main_~b~0 2) 2) 1)) (= main_~y~0 (div (div main_~b~0 2) 2)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {3641#(and (= main_~z~0 0) (= (* main_~a~0 4) main_~x~0) (not (= (mod (div main_~b~0 2) 2) 1)) (= main_~y~0 (div (div main_~b~0 2) 2)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:31:35,687 INFO L290 TraceCheckUtils]: 33: Hoare triple {3641#(and (= main_~z~0 0) (= (* main_~a~0 4) main_~x~0) (not (= (mod (div main_~b~0 2) 2) 1)) (= main_~y~0 (div (div main_~b~0 2) 2)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} assume !!(#t~post6 < 100);havoc #t~post6; {3641#(and (= main_~z~0 0) (= (* main_~a~0 4) main_~x~0) (not (= (mod (div main_~b~0 2) 2) 1)) (= main_~y~0 (div (div main_~b~0 2) 2)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:31:35,689 INFO L272 TraceCheckUtils]: 34: Hoare triple {3641#(and (= main_~z~0 0) (= (* main_~a~0 4) main_~x~0) (not (= (mod (div main_~b~0 2) 2) 1)) (= main_~y~0 (div (div main_~b~0 2) 2)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {3651#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 07:31:35,689 INFO L290 TraceCheckUtils]: 35: Hoare triple {3651#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {3655#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:31:35,690 INFO L290 TraceCheckUtils]: 36: Hoare triple {3655#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {3537#false} is VALID [2022-04-08 07:31:35,690 INFO L290 TraceCheckUtils]: 37: Hoare triple {3537#false} assume !false; {3537#false} is VALID [2022-04-08 07:31:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-08 07:31:35,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-08 07:31:54,376 INFO L290 TraceCheckUtils]: 37: Hoare triple {3537#false} assume !false; {3537#false} is VALID [2022-04-08 07:31:54,377 INFO L290 TraceCheckUtils]: 36: Hoare triple {3655#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {3537#false} is VALID [2022-04-08 07:31:54,377 INFO L290 TraceCheckUtils]: 35: Hoare triple {3651#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {3655#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:31:54,378 INFO L272 TraceCheckUtils]: 34: Hoare triple {3671#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {3651#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 07:31:54,378 INFO L290 TraceCheckUtils]: 33: Hoare triple {3671#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} assume !!(#t~post6 < 100);havoc #t~post6; {3671#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:31:54,379 INFO L290 TraceCheckUtils]: 32: Hoare triple {3671#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {3671#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:31:54,383 INFO L290 TraceCheckUtils]: 31: Hoare triple {3681#(and (or (not (< main_~y~0 0)) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (and (not (= (mod main_~y~0 2) 0)) (< main_~y~0 0))))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {3671#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:31:54,384 INFO L290 TraceCheckUtils]: 30: Hoare triple {3685#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {3681#(and (or (not (< main_~y~0 0)) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (and (not (= (mod main_~y~0 2) 0)) (< main_~y~0 0))))} is VALID [2022-04-08 07:31:54,384 INFO L290 TraceCheckUtils]: 29: Hoare triple {3685#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} assume !!(0 != ~y~0); {3685#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} is VALID [2022-04-08 07:31:54,385 INFO L284 TraceCheckUtils]: 28: Hoare quadruple {3536#true} {3685#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} #61#return; {3685#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} is VALID [2022-04-08 07:31:54,385 INFO L290 TraceCheckUtils]: 27: Hoare triple {3536#true} assume true; {3536#true} is VALID [2022-04-08 07:31:54,385 INFO L290 TraceCheckUtils]: 26: Hoare triple {3536#true} assume !(0 == ~cond); {3536#true} is VALID [2022-04-08 07:31:54,385 INFO L290 TraceCheckUtils]: 25: Hoare triple {3536#true} ~cond := #in~cond; {3536#true} is VALID [2022-04-08 07:31:54,385 INFO L272 TraceCheckUtils]: 24: Hoare triple {3685#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {3536#true} is VALID [2022-04-08 07:31:54,386 INFO L290 TraceCheckUtils]: 23: Hoare triple {3685#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} assume !!(#t~post6 < 100);havoc #t~post6; {3685#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} is VALID [2022-04-08 07:31:54,386 INFO L290 TraceCheckUtils]: 22: Hoare triple {3685#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {3685#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} is VALID [2022-04-08 07:31:54,399 INFO L290 TraceCheckUtils]: 21: Hoare triple {3713#(and (or (not (< main_~y~0 0)) (and (or (not (= (mod (+ (div main_~y~0 2) 1) 2) 0)) (= (+ main_~z~0 (* (* main_~x~0 4) (div (+ (div main_~y~0 2) 1) 2))) (* main_~b~0 main_~a~0))) (or (= (mod (+ (div main_~y~0 2) 1) 2) 0) (= (+ (* (* main_~x~0 4) (+ (div (+ (div main_~y~0 2) 1) 2) 1)) main_~z~0) (* main_~b~0 main_~a~0)))) (= (mod main_~y~0 2) 0)) (or (and (or (not (= (mod (div main_~y~0 2) 2) 0)) (= (+ main_~z~0 (* (div (div main_~y~0 2) 2) (* main_~x~0 4))) (* main_~b~0 main_~a~0))) (or (= (mod (div main_~y~0 2) 2) 0) (= (+ main_~z~0 (* (* main_~x~0 4) (+ (div (div main_~y~0 2) 2) 1))) (* main_~b~0 main_~a~0)))) (and (not (= (mod main_~y~0 2) 0)) (< main_~y~0 0)) (and (= (mod (div main_~y~0 2) 2) 1) (<= 0 (div main_~y~0 2)))))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {3685#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} is VALID [2022-04-08 07:31:54,400 INFO L290 TraceCheckUtils]: 20: Hoare triple {3717#(or (and (or (and (or (not (= (mod (+ (div main_~y~0 2) 1) 2) 0)) (= (+ main_~z~0 (* (* main_~x~0 4) (div (+ (div main_~y~0 2) 1) 2))) (* main_~b~0 main_~a~0))) (or (= (mod (+ (div main_~y~0 2) 1) 2) 0) (= (+ (* (* main_~x~0 4) (+ (div (+ (div main_~y~0 2) 1) 2) 1)) main_~z~0) (* main_~b~0 main_~a~0)))) (= (mod main_~y~0 2) 0)) (or (and (or (not (= (mod (div main_~y~0 2) 2) 0)) (= (+ main_~z~0 (* (div (div main_~y~0 2) 2) (* main_~x~0 4))) (* main_~b~0 main_~a~0))) (or (= (mod (div main_~y~0 2) 2) 0) (= (+ main_~z~0 (* (* main_~x~0 4) (+ (div (div main_~y~0 2) 2) 1))) (* main_~b~0 main_~a~0)))) (not (= (mod main_~y~0 2) 0)) (and (= (mod (div main_~y~0 2) 2) 1) (<= 0 (div main_~y~0 2))))) (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)))} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {3713#(and (or (not (< main_~y~0 0)) (and (or (not (= (mod (+ (div main_~y~0 2) 1) 2) 0)) (= (+ main_~z~0 (* (* main_~x~0 4) (div (+ (div main_~y~0 2) 1) 2))) (* main_~b~0 main_~a~0))) (or (= (mod (+ (div main_~y~0 2) 1) 2) 0) (= (+ (* (* main_~x~0 4) (+ (div (+ (div main_~y~0 2) 1) 2) 1)) main_~z~0) (* main_~b~0 main_~a~0)))) (= (mod main_~y~0 2) 0)) (or (and (or (not (= (mod (div main_~y~0 2) 2) 0)) (= (+ main_~z~0 (* (div (div main_~y~0 2) 2) (* main_~x~0 4))) (* main_~b~0 main_~a~0))) (or (= (mod (div main_~y~0 2) 2) 0) (= (+ main_~z~0 (* (* main_~x~0 4) (+ (div (div main_~y~0 2) 2) 1))) (* main_~b~0 main_~a~0)))) (and (not (= (mod main_~y~0 2) 0)) (< main_~y~0 0)) (and (= (mod (div main_~y~0 2) 2) 1) (<= 0 (div main_~y~0 2)))))} is VALID [2022-04-08 07:31:54,401 INFO L290 TraceCheckUtils]: 19: Hoare triple {3717#(or (and (or (and (or (not (= (mod (+ (div main_~y~0 2) 1) 2) 0)) (= (+ main_~z~0 (* (* main_~x~0 4) (div (+ (div main_~y~0 2) 1) 2))) (* main_~b~0 main_~a~0))) (or (= (mod (+ (div main_~y~0 2) 1) 2) 0) (= (+ (* (* main_~x~0 4) (+ (div (+ (div main_~y~0 2) 1) 2) 1)) main_~z~0) (* main_~b~0 main_~a~0)))) (= (mod main_~y~0 2) 0)) (or (and (or (not (= (mod (div main_~y~0 2) 2) 0)) (= (+ main_~z~0 (* (div (div main_~y~0 2) 2) (* main_~x~0 4))) (* main_~b~0 main_~a~0))) (or (= (mod (div main_~y~0 2) 2) 0) (= (+ main_~z~0 (* (* main_~x~0 4) (+ (div (div main_~y~0 2) 2) 1))) (* main_~b~0 main_~a~0)))) (not (= (mod main_~y~0 2) 0)) (and (= (mod (div main_~y~0 2) 2) 1) (<= 0 (div main_~y~0 2))))) (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)))} assume !!(0 != ~y~0); {3717#(or (and (or (and (or (not (= (mod (+ (div main_~y~0 2) 1) 2) 0)) (= (+ main_~z~0 (* (* main_~x~0 4) (div (+ (div main_~y~0 2) 1) 2))) (* main_~b~0 main_~a~0))) (or (= (mod (+ (div main_~y~0 2) 1) 2) 0) (= (+ (* (* main_~x~0 4) (+ (div (+ (div main_~y~0 2) 1) 2) 1)) main_~z~0) (* main_~b~0 main_~a~0)))) (= (mod main_~y~0 2) 0)) (or (and (or (not (= (mod (div main_~y~0 2) 2) 0)) (= (+ main_~z~0 (* (div (div main_~y~0 2) 2) (* main_~x~0 4))) (* main_~b~0 main_~a~0))) (or (= (mod (div main_~y~0 2) 2) 0) (= (+ main_~z~0 (* (* main_~x~0 4) (+ (div (div main_~y~0 2) 2) 1))) (* main_~b~0 main_~a~0)))) (not (= (mod main_~y~0 2) 0)) (and (= (mod (div main_~y~0 2) 2) 1) (<= 0 (div main_~y~0 2))))) (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)))} is VALID [2022-04-08 07:31:54,402 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {3536#true} {3717#(or (and (or (and (or (not (= (mod (+ (div main_~y~0 2) 1) 2) 0)) (= (+ main_~z~0 (* (* main_~x~0 4) (div (+ (div main_~y~0 2) 1) 2))) (* main_~b~0 main_~a~0))) (or (= (mod (+ (div main_~y~0 2) 1) 2) 0) (= (+ (* (* main_~x~0 4) (+ (div (+ (div main_~y~0 2) 1) 2) 1)) main_~z~0) (* main_~b~0 main_~a~0)))) (= (mod main_~y~0 2) 0)) (or (and (or (not (= (mod (div main_~y~0 2) 2) 0)) (= (+ main_~z~0 (* (div (div main_~y~0 2) 2) (* main_~x~0 4))) (* main_~b~0 main_~a~0))) (or (= (mod (div main_~y~0 2) 2) 0) (= (+ main_~z~0 (* (* main_~x~0 4) (+ (div (div main_~y~0 2) 2) 1))) (* main_~b~0 main_~a~0)))) (not (= (mod main_~y~0 2) 0)) (and (= (mod (div main_~y~0 2) 2) 1) (<= 0 (div main_~y~0 2))))) (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)))} #61#return; {3717#(or (and (or (and (or (not (= (mod (+ (div main_~y~0 2) 1) 2) 0)) (= (+ main_~z~0 (* (* main_~x~0 4) (div (+ (div main_~y~0 2) 1) 2))) (* main_~b~0 main_~a~0))) (or (= (mod (+ (div main_~y~0 2) 1) 2) 0) (= (+ (* (* main_~x~0 4) (+ (div (+ (div main_~y~0 2) 1) 2) 1)) main_~z~0) (* main_~b~0 main_~a~0)))) (= (mod main_~y~0 2) 0)) (or (and (or (not (= (mod (div main_~y~0 2) 2) 0)) (= (+ main_~z~0 (* (div (div main_~y~0 2) 2) (* main_~x~0 4))) (* main_~b~0 main_~a~0))) (or (= (mod (div main_~y~0 2) 2) 0) (= (+ main_~z~0 (* (* main_~x~0 4) (+ (div (div main_~y~0 2) 2) 1))) (* main_~b~0 main_~a~0)))) (not (= (mod main_~y~0 2) 0)) (and (= (mod (div main_~y~0 2) 2) 1) (<= 0 (div main_~y~0 2))))) (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)))} is VALID [2022-04-08 07:31:54,402 INFO L290 TraceCheckUtils]: 17: Hoare triple {3536#true} assume true; {3536#true} is VALID [2022-04-08 07:31:54,402 INFO L290 TraceCheckUtils]: 16: Hoare triple {3536#true} assume !(0 == ~cond); {3536#true} is VALID [2022-04-08 07:31:54,402 INFO L290 TraceCheckUtils]: 15: Hoare triple {3536#true} ~cond := #in~cond; {3536#true} is VALID [2022-04-08 07:31:54,402 INFO L272 TraceCheckUtils]: 14: Hoare triple {3717#(or (and (or (and (or (not (= (mod (+ (div main_~y~0 2) 1) 2) 0)) (= (+ main_~z~0 (* (* main_~x~0 4) (div (+ (div main_~y~0 2) 1) 2))) (* main_~b~0 main_~a~0))) (or (= (mod (+ (div main_~y~0 2) 1) 2) 0) (= (+ (* (* main_~x~0 4) (+ (div (+ (div main_~y~0 2) 1) 2) 1)) main_~z~0) (* main_~b~0 main_~a~0)))) (= (mod main_~y~0 2) 0)) (or (and (or (not (= (mod (div main_~y~0 2) 2) 0)) (= (+ main_~z~0 (* (div (div main_~y~0 2) 2) (* main_~x~0 4))) (* main_~b~0 main_~a~0))) (or (= (mod (div main_~y~0 2) 2) 0) (= (+ main_~z~0 (* (* main_~x~0 4) (+ (div (div main_~y~0 2) 2) 1))) (* main_~b~0 main_~a~0)))) (not (= (mod main_~y~0 2) 0)) (and (= (mod (div main_~y~0 2) 2) 1) (<= 0 (div main_~y~0 2))))) (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {3536#true} is VALID [2022-04-08 07:31:54,403 INFO L290 TraceCheckUtils]: 13: Hoare triple {3717#(or (and (or (and (or (not (= (mod (+ (div main_~y~0 2) 1) 2) 0)) (= (+ main_~z~0 (* (* main_~x~0 4) (div (+ (div main_~y~0 2) 1) 2))) (* main_~b~0 main_~a~0))) (or (= (mod (+ (div main_~y~0 2) 1) 2) 0) (= (+ (* (* main_~x~0 4) (+ (div (+ (div main_~y~0 2) 1) 2) 1)) main_~z~0) (* main_~b~0 main_~a~0)))) (= (mod main_~y~0 2) 0)) (or (and (or (not (= (mod (div main_~y~0 2) 2) 0)) (= (+ main_~z~0 (* (div (div main_~y~0 2) 2) (* main_~x~0 4))) (* main_~b~0 main_~a~0))) (or (= (mod (div main_~y~0 2) 2) 0) (= (+ main_~z~0 (* (* main_~x~0 4) (+ (div (div main_~y~0 2) 2) 1))) (* main_~b~0 main_~a~0)))) (not (= (mod main_~y~0 2) 0)) (and (= (mod (div main_~y~0 2) 2) 1) (<= 0 (div main_~y~0 2))))) (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)))} assume !!(#t~post6 < 100);havoc #t~post6; {3717#(or (and (or (and (or (not (= (mod (+ (div main_~y~0 2) 1) 2) 0)) (= (+ main_~z~0 (* (* main_~x~0 4) (div (+ (div main_~y~0 2) 1) 2))) (* main_~b~0 main_~a~0))) (or (= (mod (+ (div main_~y~0 2) 1) 2) 0) (= (+ (* (* main_~x~0 4) (+ (div (+ (div main_~y~0 2) 1) 2) 1)) main_~z~0) (* main_~b~0 main_~a~0)))) (= (mod main_~y~0 2) 0)) (or (and (or (not (= (mod (div main_~y~0 2) 2) 0)) (= (+ main_~z~0 (* (div (div main_~y~0 2) 2) (* main_~x~0 4))) (* main_~b~0 main_~a~0))) (or (= (mod (div main_~y~0 2) 2) 0) (= (+ main_~z~0 (* (* main_~x~0 4) (+ (div (div main_~y~0 2) 2) 1))) (* main_~b~0 main_~a~0)))) (not (= (mod main_~y~0 2) 0)) (and (= (mod (div main_~y~0 2) 2) 1) (<= 0 (div main_~y~0 2))))) (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)))} is VALID [2022-04-08 07:31:54,404 INFO L290 TraceCheckUtils]: 12: Hoare triple {3717#(or (and (or (and (or (not (= (mod (+ (div main_~y~0 2) 1) 2) 0)) (= (+ main_~z~0 (* (* main_~x~0 4) (div (+ (div main_~y~0 2) 1) 2))) (* main_~b~0 main_~a~0))) (or (= (mod (+ (div main_~y~0 2) 1) 2) 0) (= (+ (* (* main_~x~0 4) (+ (div (+ (div main_~y~0 2) 1) 2) 1)) main_~z~0) (* main_~b~0 main_~a~0)))) (= (mod main_~y~0 2) 0)) (or (and (or (not (= (mod (div main_~y~0 2) 2) 0)) (= (+ main_~z~0 (* (div (div main_~y~0 2) 2) (* main_~x~0 4))) (* main_~b~0 main_~a~0))) (or (= (mod (div main_~y~0 2) 2) 0) (= (+ main_~z~0 (* (* main_~x~0 4) (+ (div (div main_~y~0 2) 2) 1))) (* main_~b~0 main_~a~0)))) (not (= (mod main_~y~0 2) 0)) (and (= (mod (div main_~y~0 2) 2) 1) (<= 0 (div main_~y~0 2))))) (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {3717#(or (and (or (and (or (not (= (mod (+ (div main_~y~0 2) 1) 2) 0)) (= (+ main_~z~0 (* (* main_~x~0 4) (div (+ (div main_~y~0 2) 1) 2))) (* main_~b~0 main_~a~0))) (or (= (mod (+ (div main_~y~0 2) 1) 2) 0) (= (+ (* (* main_~x~0 4) (+ (div (+ (div main_~y~0 2) 1) 2) 1)) main_~z~0) (* main_~b~0 main_~a~0)))) (= (mod main_~y~0 2) 0)) (or (and (or (not (= (mod (div main_~y~0 2) 2) 0)) (= (+ main_~z~0 (* (div (div main_~y~0 2) 2) (* main_~x~0 4))) (* main_~b~0 main_~a~0))) (or (= (mod (div main_~y~0 2) 2) 0) (= (+ main_~z~0 (* (* main_~x~0 4) (+ (div (div main_~y~0 2) 2) 1))) (* main_~b~0 main_~a~0)))) (not (= (mod main_~y~0 2) 0)) (and (= (mod (div main_~y~0 2) 2) 1) (<= 0 (div main_~y~0 2))))) (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)))} is VALID [2022-04-08 07:31:54,407 INFO L290 TraceCheckUtils]: 11: Hoare triple {3745#(or (and (= (mod main_~b~0 2) 0) (= (mod (div main_~b~0 2) 2) 0)) (<= 0 main_~b~0))} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {3717#(or (and (or (and (or (not (= (mod (+ (div main_~y~0 2) 1) 2) 0)) (= (+ main_~z~0 (* (* main_~x~0 4) (div (+ (div main_~y~0 2) 1) 2))) (* main_~b~0 main_~a~0))) (or (= (mod (+ (div main_~y~0 2) 1) 2) 0) (= (+ (* (* main_~x~0 4) (+ (div (+ (div main_~y~0 2) 1) 2) 1)) main_~z~0) (* main_~b~0 main_~a~0)))) (= (mod main_~y~0 2) 0)) (or (and (or (not (= (mod (div main_~y~0 2) 2) 0)) (= (+ main_~z~0 (* (div (div main_~y~0 2) 2) (* main_~x~0 4))) (* main_~b~0 main_~a~0))) (or (= (mod (div main_~y~0 2) 2) 0) (= (+ main_~z~0 (* (* main_~x~0 4) (+ (div (div main_~y~0 2) 2) 1))) (* main_~b~0 main_~a~0)))) (not (= (mod main_~y~0 2) 0)) (and (= (mod (div main_~y~0 2) 2) 1) (<= 0 (div main_~y~0 2))))) (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)))} is VALID [2022-04-08 07:31:54,407 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {3566#(not (= |assume_abort_if_not_#in~cond| 0))} {3536#true} #59#return; {3745#(or (and (= (mod main_~b~0 2) 0) (= (mod (div main_~b~0 2) 2) 0)) (<= 0 main_~b~0))} is VALID [2022-04-08 07:31:54,407 INFO L290 TraceCheckUtils]: 9: Hoare triple {3566#(not (= |assume_abort_if_not_#in~cond| 0))} assume true; {3566#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 07:31:54,408 INFO L290 TraceCheckUtils]: 8: Hoare triple {3758#(or (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond 0))} assume !(0 == ~cond); {3566#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 07:31:54,408 INFO L290 TraceCheckUtils]: 7: Hoare triple {3536#true} ~cond := #in~cond; {3758#(or (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond 0))} is VALID [2022-04-08 07:31:54,408 INFO L272 TraceCheckUtils]: 6: Hoare triple {3536#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {3536#true} is VALID [2022-04-08 07:31:54,408 INFO L290 TraceCheckUtils]: 5: Hoare triple {3536#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {3536#true} is VALID [2022-04-08 07:31:54,408 INFO L272 TraceCheckUtils]: 4: Hoare triple {3536#true} call #t~ret7 := main(); {3536#true} is VALID [2022-04-08 07:31:54,409 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {3536#true} {3536#true} #65#return; {3536#true} is VALID [2022-04-08 07:31:54,409 INFO L290 TraceCheckUtils]: 2: Hoare triple {3536#true} assume true; {3536#true} is VALID [2022-04-08 07:31:54,409 INFO L290 TraceCheckUtils]: 1: Hoare triple {3536#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {3536#true} is VALID [2022-04-08 07:31:54,409 INFO L272 TraceCheckUtils]: 0: Hoare triple {3536#true} call ULTIMATE.init(); {3536#true} is VALID [2022-04-08 07:31:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-08 07:31:54,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 07:31:54,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797071719] [2022-04-08 07:31:54,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 07:31:54,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138898698] [2022-04-08 07:31:54,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138898698] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-08 07:31:54,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-08 07:31:54,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-04-08 07:31:54,410 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 07:31:54,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1775917487] [2022-04-08 07:31:54,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1775917487] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:31:54,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:31:54,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-08 07:31:54,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060117351] [2022-04-08 07:31:54,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 07:31:54,411 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-04-08 07:31:54,411 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 07:31:54,411 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:31:54,440 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 35 edges. 35 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:31:54,440 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-08 07:31:54,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 07:31:54,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-08 07:31:54,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-04-08 07:31:54,441 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:31:55,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:31:55,491 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-04-08 07:31:55,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-08 07:31:55,491 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-04-08 07:31:55,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 07:31:55,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:31:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 56 transitions. [2022-04-08 07:31:55,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:31:55,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 56 transitions. [2022-04-08 07:31:55,495 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 12 states and 56 transitions. [2022-04-08 07:31:55,562 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 56 edges. 56 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:31:55,564 INFO L225 Difference]: With dead ends: 70 [2022-04-08 07:31:55,564 INFO L226 Difference]: Without dead ends: 68 [2022-04-08 07:31:55,564 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-04-08 07:31:55,565 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-08 07:31:55,565 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 167 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-08 07:31:55,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-08 07:31:55,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-04-08 07:31:55,635 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 07:31:55,635 INFO L82 GeneralOperation]: Start isEquivalent. First operand 68 states. Second operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-08 07:31:55,635 INFO L74 IsIncluded]: Start isIncluded. First operand 68 states. Second operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-08 07:31:55,635 INFO L87 Difference]: Start difference. First operand 68 states. Second operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-08 07:31:55,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:31:55,638 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-04-08 07:31:55,638 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-04-08 07:31:55,638 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:31:55,638 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:31:55,638 INFO L74 IsIncluded]: Start isIncluded. First operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Second operand 68 states. [2022-04-08 07:31:55,639 INFO L87 Difference]: Start difference. First operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Second operand 68 states. [2022-04-08 07:31:55,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:31:55,640 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-04-08 07:31:55,640 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2022-04-08 07:31:55,641 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:31:55,641 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:31:55,641 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 07:31:55,641 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 07:31:55,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-08 07:31:55,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2022-04-08 07:31:55,642 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 38 [2022-04-08 07:31:55,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 07:31:55,643 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2022-04-08 07:31:55,643 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:31:55,643 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 65 states and 70 transitions. [2022-04-08 07:32:05,766 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 70 edges. 65 inductive. 0 not inductive. 5 times theorem prover too weak to decide inductivity. [2022-04-08 07:32:05,766 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2022-04-08 07:32:05,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-08 07:32:05,767 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 07:32:05,767 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 07:32:05,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-08 07:32:05,971 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-08 07:32:05,971 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 07:32:05,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 07:32:05,972 INFO L85 PathProgramCache]: Analyzing trace with hash -645753386, now seen corresponding path program 1 times [2022-04-08 07:32:05,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 07:32:05,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1721630393] [2022-04-08 07:32:11,686 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-08 07:32:11,686 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-08 07:32:11,686 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 07:32:11,686 INFO L85 PathProgramCache]: Analyzing trace with hash -645753386, now seen corresponding path program 2 times [2022-04-08 07:32:11,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 07:32:11,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086133500] [2022-04-08 07:32:11,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 07:32:11,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 07:32:11,700 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 07:32:11,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529517428] [2022-04-08 07:32:11,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-08 07:32:11,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:32:11,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 07:32:11,703 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-08 07:32:11,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-08 07:32:11,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-08 07:32:11,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 07:32:11,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-08 07:32:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 07:32:11,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 07:32:30,108 INFO L272 TraceCheckUtils]: 0: Hoare triple {4192#true} call ULTIMATE.init(); {4192#true} is VALID [2022-04-08 07:32:30,108 INFO L290 TraceCheckUtils]: 1: Hoare triple {4192#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {4192#true} is VALID [2022-04-08 07:32:30,109 INFO L290 TraceCheckUtils]: 2: Hoare triple {4192#true} assume true; {4192#true} is VALID [2022-04-08 07:32:30,109 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {4192#true} {4192#true} #65#return; {4192#true} is VALID [2022-04-08 07:32:30,109 INFO L272 TraceCheckUtils]: 4: Hoare triple {4192#true} call #t~ret7 := main(); {4192#true} is VALID [2022-04-08 07:32:30,109 INFO L290 TraceCheckUtils]: 5: Hoare triple {4192#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {4192#true} is VALID [2022-04-08 07:32:30,109 INFO L272 TraceCheckUtils]: 6: Hoare triple {4192#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {4192#true} is VALID [2022-04-08 07:32:30,109 INFO L290 TraceCheckUtils]: 7: Hoare triple {4192#true} ~cond := #in~cond; {4218#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} is VALID [2022-04-08 07:32:30,110 INFO L290 TraceCheckUtils]: 8: Hoare triple {4218#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} assume !(0 == ~cond); {4222#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 07:32:30,110 INFO L290 TraceCheckUtils]: 9: Hoare triple {4222#(not (= |assume_abort_if_not_#in~cond| 0))} assume true; {4222#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 07:32:30,111 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {4222#(not (= |assume_abort_if_not_#in~cond| 0))} {4192#true} #59#return; {4229#(<= 1 main_~b~0)} is VALID [2022-04-08 07:32:30,111 INFO L290 TraceCheckUtils]: 11: Hoare triple {4229#(<= 1 main_~b~0)} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {4233#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:32:30,112 INFO L290 TraceCheckUtils]: 12: Hoare triple {4233#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {4233#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:32:30,112 INFO L290 TraceCheckUtils]: 13: Hoare triple {4233#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} assume !!(#t~post6 < 100);havoc #t~post6; {4233#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:32:30,113 INFO L272 TraceCheckUtils]: 14: Hoare triple {4233#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {4192#true} is VALID [2022-04-08 07:32:30,113 INFO L290 TraceCheckUtils]: 15: Hoare triple {4192#true} ~cond := #in~cond; {4192#true} is VALID [2022-04-08 07:32:30,113 INFO L290 TraceCheckUtils]: 16: Hoare triple {4192#true} assume !(0 == ~cond); {4192#true} is VALID [2022-04-08 07:32:30,113 INFO L290 TraceCheckUtils]: 17: Hoare triple {4192#true} assume true; {4192#true} is VALID [2022-04-08 07:32:30,113 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {4192#true} {4233#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} #61#return; {4233#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:32:30,114 INFO L290 TraceCheckUtils]: 19: Hoare triple {4233#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} assume !!(0 != ~y~0); {4233#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:32:30,115 INFO L290 TraceCheckUtils]: 20: Hoare triple {4233#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {4261#(and (= main_~z~0 0) (not (= (mod main_~y~0 2) 1)) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:32:30,116 INFO L290 TraceCheckUtils]: 21: Hoare triple {4261#(and (= main_~z~0 0) (not (= (mod main_~y~0 2) 1)) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {4265#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:32:30,116 INFO L290 TraceCheckUtils]: 22: Hoare triple {4265#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {4265#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:32:30,117 INFO L290 TraceCheckUtils]: 23: Hoare triple {4265#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} assume !!(#t~post6 < 100);havoc #t~post6; {4265#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:32:30,117 INFO L272 TraceCheckUtils]: 24: Hoare triple {4265#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {4192#true} is VALID [2022-04-08 07:32:30,117 INFO L290 TraceCheckUtils]: 25: Hoare triple {4192#true} ~cond := #in~cond; {4278#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:32:30,118 INFO L290 TraceCheckUtils]: 26: Hoare triple {4278#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {4282#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:32:30,118 INFO L290 TraceCheckUtils]: 27: Hoare triple {4282#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {4282#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:32:30,119 INFO L284 TraceCheckUtils]: 28: Hoare quadruple {4282#(not (= |__VERIFIER_assert_#in~cond| 0))} {4265#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} #61#return; {4265#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:32:30,119 INFO L290 TraceCheckUtils]: 29: Hoare triple {4265#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} assume !!(0 != ~y~0); {4265#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:32:30,121 INFO L290 TraceCheckUtils]: 30: Hoare triple {4265#(and (= main_~z~0 0) (= main_~y~0 (div main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} assume 1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2);~z~0 := ~z~0 + ~x~0;~y~0 := ~y~0 - 1; {4295#(and (= main_~z~0 main_~x~0) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (= (div main_~b~0 2) (+ main_~y~0 1)) (<= 0 (div main_~b~0 2)) (<= 1 (mod (div main_~b~0 2) 2)))} is VALID [2022-04-08 07:32:30,122 INFO L290 TraceCheckUtils]: 31: Hoare triple {4295#(and (= main_~z~0 main_~x~0) (= (* main_~a~0 2) main_~x~0) (not (= (mod main_~b~0 2) 1)) (= (div main_~b~0 2) (+ main_~y~0 1)) (<= 0 (div main_~b~0 2)) (<= 1 (mod (div main_~b~0 2) 2)))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {4299#(and (= (div (+ (- 1) (div main_~b~0 2)) 2) main_~y~0) (= (* main_~a~0 2) main_~z~0) (not (= (mod main_~b~0 2) 1)) (= main_~x~0 (* main_~z~0 2)) (<= 0 (div main_~b~0 2)) (<= 1 (mod (div main_~b~0 2) 2)))} is VALID [2022-04-08 07:32:30,125 INFO L290 TraceCheckUtils]: 32: Hoare triple {4299#(and (= (div (+ (- 1) (div main_~b~0 2)) 2) main_~y~0) (= (* main_~a~0 2) main_~z~0) (not (= (mod main_~b~0 2) 1)) (= main_~x~0 (* main_~z~0 2)) (<= 0 (div main_~b~0 2)) (<= 1 (mod (div main_~b~0 2) 2)))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {4299#(and (= (div (+ (- 1) (div main_~b~0 2)) 2) main_~y~0) (= (* main_~a~0 2) main_~z~0) (not (= (mod main_~b~0 2) 1)) (= main_~x~0 (* main_~z~0 2)) (<= 0 (div main_~b~0 2)) (<= 1 (mod (div main_~b~0 2) 2)))} is VALID [2022-04-08 07:32:30,132 INFO L290 TraceCheckUtils]: 33: Hoare triple {4299#(and (= (div (+ (- 1) (div main_~b~0 2)) 2) main_~y~0) (= (* main_~a~0 2) main_~z~0) (not (= (mod main_~b~0 2) 1)) (= main_~x~0 (* main_~z~0 2)) (<= 0 (div main_~b~0 2)) (<= 1 (mod (div main_~b~0 2) 2)))} assume !!(#t~post6 < 100);havoc #t~post6; {4299#(and (= (div (+ (- 1) (div main_~b~0 2)) 2) main_~y~0) (= (* main_~a~0 2) main_~z~0) (not (= (mod main_~b~0 2) 1)) (= main_~x~0 (* main_~z~0 2)) (<= 0 (div main_~b~0 2)) (<= 1 (mod (div main_~b~0 2) 2)))} is VALID [2022-04-08 07:32:30,741 INFO L272 TraceCheckUtils]: 34: Hoare triple {4299#(and (= (div (+ (- 1) (div main_~b~0 2)) 2) main_~y~0) (= (* main_~a~0 2) main_~z~0) (not (= (mod main_~b~0 2) 1)) (= main_~x~0 (* main_~z~0 2)) (<= 0 (div main_~b~0 2)) (<= 1 (mod (div main_~b~0 2) 2)))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {4309#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 07:32:30,742 INFO L290 TraceCheckUtils]: 35: Hoare triple {4309#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {4313#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:32:30,745 INFO L290 TraceCheckUtils]: 36: Hoare triple {4313#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {4193#false} is VALID [2022-04-08 07:32:30,746 INFO L290 TraceCheckUtils]: 37: Hoare triple {4193#false} assume !false; {4193#false} is VALID [2022-04-08 07:32:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-08 07:32:30,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-08 07:33:28,173 INFO L290 TraceCheckUtils]: 37: Hoare triple {4193#false} assume !false; {4193#false} is VALID [2022-04-08 07:33:28,174 INFO L290 TraceCheckUtils]: 36: Hoare triple {4313#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {4193#false} is VALID [2022-04-08 07:33:28,174 INFO L290 TraceCheckUtils]: 35: Hoare triple {4309#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {4313#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:33:28,175 INFO L272 TraceCheckUtils]: 34: Hoare triple {4329#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {4309#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 07:33:28,175 INFO L290 TraceCheckUtils]: 33: Hoare triple {4329#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} assume !!(#t~post6 < 100);havoc #t~post6; {4329#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:33:28,175 INFO L290 TraceCheckUtils]: 32: Hoare triple {4329#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {4329#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:33:28,180 INFO L290 TraceCheckUtils]: 31: Hoare triple {4339#(and (or (not (< main_~y~0 0)) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (and (not (= (mod main_~y~0 2) 0)) (< main_~y~0 0))))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {4329#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:33:28,182 INFO L290 TraceCheckUtils]: 30: Hoare triple {4343#(or (= (+ (* (* main_~x~0 2) (div (+ (- 1) main_~y~0) 2)) main_~z~0 main_~x~0) (* main_~b~0 main_~a~0)) (not (<= 1 (mod main_~y~0 2))) (< main_~y~0 0))} assume 1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2);~z~0 := ~z~0 + ~x~0;~y~0 := ~y~0 - 1; {4339#(and (or (not (< main_~y~0 0)) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (and (not (= (mod main_~y~0 2) 0)) (< main_~y~0 0))))} is VALID [2022-04-08 07:33:28,182 INFO L290 TraceCheckUtils]: 29: Hoare triple {4343#(or (= (+ (* (* main_~x~0 2) (div (+ (- 1) main_~y~0) 2)) main_~z~0 main_~x~0) (* main_~b~0 main_~a~0)) (not (<= 1 (mod main_~y~0 2))) (< main_~y~0 0))} assume !!(0 != ~y~0); {4343#(or (= (+ (* (* main_~x~0 2) (div (+ (- 1) main_~y~0) 2)) main_~z~0 main_~x~0) (* main_~b~0 main_~a~0)) (not (<= 1 (mod main_~y~0 2))) (< main_~y~0 0))} is VALID [2022-04-08 07:33:29,212 INFO L284 TraceCheckUtils]: 28: Hoare quadruple {4282#(not (= |__VERIFIER_assert_#in~cond| 0))} {4192#true} #61#return; {4343#(or (= (+ (* (* main_~x~0 2) (div (+ (- 1) main_~y~0) 2)) main_~z~0 main_~x~0) (* main_~b~0 main_~a~0)) (not (<= 1 (mod main_~y~0 2))) (< main_~y~0 0))} is VALID [2022-04-08 07:33:29,212 INFO L290 TraceCheckUtils]: 27: Hoare triple {4282#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {4282#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:33:29,213 INFO L290 TraceCheckUtils]: 26: Hoare triple {4359#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} assume !(0 == ~cond); {4282#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:33:29,213 INFO L290 TraceCheckUtils]: 25: Hoare triple {4192#true} ~cond := #in~cond; {4359#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-08 07:33:29,213 INFO L272 TraceCheckUtils]: 24: Hoare triple {4192#true} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {4192#true} is VALID [2022-04-08 07:33:29,213 INFO L290 TraceCheckUtils]: 23: Hoare triple {4192#true} assume !!(#t~post6 < 100);havoc #t~post6; {4192#true} is VALID [2022-04-08 07:33:29,213 INFO L290 TraceCheckUtils]: 22: Hoare triple {4192#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {4192#true} is VALID [2022-04-08 07:33:29,213 INFO L290 TraceCheckUtils]: 21: Hoare triple {4192#true} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {4192#true} is VALID [2022-04-08 07:33:29,213 INFO L290 TraceCheckUtils]: 20: Hoare triple {4192#true} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {4192#true} is VALID [2022-04-08 07:33:29,214 INFO L290 TraceCheckUtils]: 19: Hoare triple {4192#true} assume !!(0 != ~y~0); {4192#true} is VALID [2022-04-08 07:33:29,214 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {4192#true} {4192#true} #61#return; {4192#true} is VALID [2022-04-08 07:33:29,214 INFO L290 TraceCheckUtils]: 17: Hoare triple {4192#true} assume true; {4192#true} is VALID [2022-04-08 07:33:29,214 INFO L290 TraceCheckUtils]: 16: Hoare triple {4192#true} assume !(0 == ~cond); {4192#true} is VALID [2022-04-08 07:33:29,214 INFO L290 TraceCheckUtils]: 15: Hoare triple {4192#true} ~cond := #in~cond; {4192#true} is VALID [2022-04-08 07:33:29,214 INFO L272 TraceCheckUtils]: 14: Hoare triple {4192#true} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {4192#true} is VALID [2022-04-08 07:33:29,214 INFO L290 TraceCheckUtils]: 13: Hoare triple {4192#true} assume !!(#t~post6 < 100);havoc #t~post6; {4192#true} is VALID [2022-04-08 07:33:29,214 INFO L290 TraceCheckUtils]: 12: Hoare triple {4192#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {4192#true} is VALID [2022-04-08 07:33:29,214 INFO L290 TraceCheckUtils]: 11: Hoare triple {4192#true} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {4192#true} is VALID [2022-04-08 07:33:29,214 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {4192#true} {4192#true} #59#return; {4192#true} is VALID [2022-04-08 07:33:29,214 INFO L290 TraceCheckUtils]: 9: Hoare triple {4192#true} assume true; {4192#true} is VALID [2022-04-08 07:33:29,214 INFO L290 TraceCheckUtils]: 8: Hoare triple {4192#true} assume !(0 == ~cond); {4192#true} is VALID [2022-04-08 07:33:29,214 INFO L290 TraceCheckUtils]: 7: Hoare triple {4192#true} ~cond := #in~cond; {4192#true} is VALID [2022-04-08 07:33:29,214 INFO L272 TraceCheckUtils]: 6: Hoare triple {4192#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {4192#true} is VALID [2022-04-08 07:33:29,215 INFO L290 TraceCheckUtils]: 5: Hoare triple {4192#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {4192#true} is VALID [2022-04-08 07:33:29,215 INFO L272 TraceCheckUtils]: 4: Hoare triple {4192#true} call #t~ret7 := main(); {4192#true} is VALID [2022-04-08 07:33:29,215 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {4192#true} {4192#true} #65#return; {4192#true} is VALID [2022-04-08 07:33:29,215 INFO L290 TraceCheckUtils]: 2: Hoare triple {4192#true} assume true; {4192#true} is VALID [2022-04-08 07:33:29,215 INFO L290 TraceCheckUtils]: 1: Hoare triple {4192#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {4192#true} is VALID [2022-04-08 07:33:29,215 INFO L272 TraceCheckUtils]: 0: Hoare triple {4192#true} call ULTIMATE.init(); {4192#true} is VALID [2022-04-08 07:33:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-08 07:33:29,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 07:33:29,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086133500] [2022-04-08 07:33:29,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 07:33:29,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529517428] [2022-04-08 07:33:29,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529517428] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-08 07:33:29,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-08 07:33:29,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-04-08 07:33:29,217 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 07:33:29,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1721630393] [2022-04-08 07:33:29,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1721630393] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:33:29,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:33:29,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-08 07:33:29,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325659592] [2022-04-08 07:33:29,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 07:33:29,219 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-04-08 07:33:29,219 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 07:33:29,219 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:33:30,376 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 38 edges. 38 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:33:30,377 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-08 07:33:30,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 07:33:30,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-08 07:33:30,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=250, Unknown=1, NotChecked=0, Total=306 [2022-04-08 07:33:30,377 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:33:34,943 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-08 07:33:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:33:36,216 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2022-04-08 07:33:36,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-08 07:33:36,216 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-04-08 07:33:36,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 07:33:36,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:33:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 57 transitions. [2022-04-08 07:33:36,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:33:36,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 57 transitions. [2022-04-08 07:33:36,219 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 14 states and 57 transitions. [2022-04-08 07:33:36,623 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 57 edges. 57 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:33:36,625 INFO L225 Difference]: With dead ends: 78 [2022-04-08 07:33:36,625 INFO L226 Difference]: Without dead ends: 76 [2022-04-08 07:33:36,625 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=72, Invalid=347, Unknown=1, NotChecked=0, Total=420 [2022-04-08 07:33:36,626 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-08 07:33:36,626 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 164 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-08 07:33:36,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-08 07:33:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2022-04-08 07:33:36,700 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 07:33:36,700 INFO L82 GeneralOperation]: Start isEquivalent. First operand 76 states. Second operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-08 07:33:36,700 INFO L74 IsIncluded]: Start isIncluded. First operand 76 states. Second operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-08 07:33:36,700 INFO L87 Difference]: Start difference. First operand 76 states. Second operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-08 07:33:36,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:33:36,702 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-04-08 07:33:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-04-08 07:33:36,702 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:33:36,702 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:33:36,703 INFO L74 IsIncluded]: Start isIncluded. First operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Second operand 76 states. [2022-04-08 07:33:36,703 INFO L87 Difference]: Start difference. First operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Second operand 76 states. [2022-04-08 07:33:36,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:33:36,704 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-04-08 07:33:36,704 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-04-08 07:33:36,705 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:33:36,705 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:33:36,705 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 07:33:36,705 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 07:33:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-08 07:33:36,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2022-04-08 07:33:36,706 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 38 [2022-04-08 07:33:36,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 07:33:36,707 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2022-04-08 07:33:36,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:33:36,707 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 65 states and 70 transitions. [2022-04-08 07:33:47,341 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 70 edges. 65 inductive. 0 not inductive. 5 times theorem prover too weak to decide inductivity. [2022-04-08 07:33:47,341 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2022-04-08 07:33:47,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-08 07:33:47,341 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 07:33:47,342 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 07:33:47,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-08 07:33:47,542 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-08 07:33:47,542 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 07:33:47,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 07:33:47,543 INFO L85 PathProgramCache]: Analyzing trace with hash 539044694, now seen corresponding path program 3 times [2022-04-08 07:33:47,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 07:33:47,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1124524421] [2022-04-08 07:33:51,024 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-08 07:33:51,024 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-08 07:33:51,024 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 07:33:51,024 INFO L85 PathProgramCache]: Analyzing trace with hash 539044694, now seen corresponding path program 4 times [2022-04-08 07:33:51,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 07:33:51,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763884067] [2022-04-08 07:33:51,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 07:33:51,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 07:33:51,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 07:33:51,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536511001] [2022-04-08 07:33:51,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-08 07:33:51,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:33:51,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 07:33:51,044 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-08 07:33:51,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-08 07:33:51,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-08 07:33:51,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 07:33:51,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-08 07:33:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 07:33:51,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 07:33:57,348 INFO L272 TraceCheckUtils]: 0: Hoare triple {4881#true} call ULTIMATE.init(); {4881#true} is VALID [2022-04-08 07:33:57,348 INFO L290 TraceCheckUtils]: 1: Hoare triple {4881#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {4881#true} is VALID [2022-04-08 07:33:57,348 INFO L290 TraceCheckUtils]: 2: Hoare triple {4881#true} assume true; {4881#true} is VALID [2022-04-08 07:33:57,348 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {4881#true} {4881#true} #65#return; {4881#true} is VALID [2022-04-08 07:33:57,348 INFO L272 TraceCheckUtils]: 4: Hoare triple {4881#true} call #t~ret7 := main(); {4881#true} is VALID [2022-04-08 07:33:57,348 INFO L290 TraceCheckUtils]: 5: Hoare triple {4881#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {4881#true} is VALID [2022-04-08 07:33:57,348 INFO L272 TraceCheckUtils]: 6: Hoare triple {4881#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {4881#true} is VALID [2022-04-08 07:33:57,348 INFO L290 TraceCheckUtils]: 7: Hoare triple {4881#true} ~cond := #in~cond; {4881#true} is VALID [2022-04-08 07:33:57,348 INFO L290 TraceCheckUtils]: 8: Hoare triple {4881#true} assume !(0 == ~cond); {4881#true} is VALID [2022-04-08 07:33:57,349 INFO L290 TraceCheckUtils]: 9: Hoare triple {4881#true} assume true; {4881#true} is VALID [2022-04-08 07:33:57,349 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {4881#true} {4881#true} #59#return; {4881#true} is VALID [2022-04-08 07:33:57,349 INFO L290 TraceCheckUtils]: 11: Hoare triple {4881#true} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {4919#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:33:57,349 INFO L290 TraceCheckUtils]: 12: Hoare triple {4919#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {4919#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:33:57,350 INFO L290 TraceCheckUtils]: 13: Hoare triple {4919#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} assume !!(#t~post6 < 100);havoc #t~post6; {4919#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:33:57,350 INFO L272 TraceCheckUtils]: 14: Hoare triple {4919#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {4881#true} is VALID [2022-04-08 07:33:57,350 INFO L290 TraceCheckUtils]: 15: Hoare triple {4881#true} ~cond := #in~cond; {4881#true} is VALID [2022-04-08 07:33:57,350 INFO L290 TraceCheckUtils]: 16: Hoare triple {4881#true} assume !(0 == ~cond); {4881#true} is VALID [2022-04-08 07:33:57,350 INFO L290 TraceCheckUtils]: 17: Hoare triple {4881#true} assume true; {4881#true} is VALID [2022-04-08 07:33:57,354 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {4881#true} {4919#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} #61#return; {4919#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:33:57,355 INFO L290 TraceCheckUtils]: 19: Hoare triple {4919#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} assume !!(0 != ~y~0); {4944#(and (= main_~z~0 0) (not (= main_~y~0 0)) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:33:57,356 INFO L290 TraceCheckUtils]: 20: Hoare triple {4944#(and (= main_~z~0 0) (not (= main_~y~0 0)) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} assume 1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2);~z~0 := ~z~0 + ~x~0;~y~0 := ~y~0 - 1; {4948#(and (<= 1 (mod (+ main_~y~0 1) 2)) (= main_~b~0 (+ main_~y~0 1)) (= main_~z~0 main_~x~0) (= main_~a~0 main_~x~0) (<= 0 (+ main_~y~0 1)))} is VALID [2022-04-08 07:33:57,357 INFO L290 TraceCheckUtils]: 21: Hoare triple {4948#(and (<= 1 (mod (+ main_~y~0 1) 2)) (= main_~b~0 (+ main_~y~0 1)) (= main_~z~0 main_~x~0) (= main_~a~0 main_~x~0) (<= 0 (+ main_~y~0 1)))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {4952#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} is VALID [2022-04-08 07:33:57,357 INFO L290 TraceCheckUtils]: 22: Hoare triple {4952#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {4952#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} is VALID [2022-04-08 07:33:57,358 INFO L290 TraceCheckUtils]: 23: Hoare triple {4952#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} assume !!(#t~post6 < 100);havoc #t~post6; {4952#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} is VALID [2022-04-08 07:33:57,358 INFO L272 TraceCheckUtils]: 24: Hoare triple {4952#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {4881#true} is VALID [2022-04-08 07:33:57,358 INFO L290 TraceCheckUtils]: 25: Hoare triple {4881#true} ~cond := #in~cond; {4965#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:33:57,359 INFO L290 TraceCheckUtils]: 26: Hoare triple {4965#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {4969#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:33:57,359 INFO L290 TraceCheckUtils]: 27: Hoare triple {4969#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {4969#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:33:57,359 INFO L284 TraceCheckUtils]: 28: Hoare quadruple {4969#(not (= |__VERIFIER_assert_#in~cond| 0))} {4952#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} #61#return; {4952#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} is VALID [2022-04-08 07:33:57,360 INFO L290 TraceCheckUtils]: 29: Hoare triple {4952#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} assume !!(0 != ~y~0); {4952#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} is VALID [2022-04-08 07:33:57,361 INFO L290 TraceCheckUtils]: 30: Hoare triple {4952#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 2) main_~x~0) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {4982#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (not (= (mod main_~y~0 2) 1)) (= (* main_~a~0 2) main_~x~0) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} is VALID [2022-04-08 07:33:57,362 INFO L290 TraceCheckUtils]: 31: Hoare triple {4982#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (not (= (mod main_~y~0 2) 1)) (= (* main_~a~0 2) main_~x~0) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {4986#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 4) main_~x~0) (= (div (div (+ (- 1) main_~b~0) 2) 2) main_~y~0) (<= 0 main_~b~0) (not (= (mod (div (+ (- 1) main_~b~0) 2) 2) 1)))} is VALID [2022-04-08 07:33:57,362 INFO L290 TraceCheckUtils]: 32: Hoare triple {4986#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 4) main_~x~0) (= (div (div (+ (- 1) main_~b~0) 2) 2) main_~y~0) (<= 0 main_~b~0) (not (= (mod (div (+ (- 1) main_~b~0) 2) 2) 1)))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {4986#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 4) main_~x~0) (= (div (div (+ (- 1) main_~b~0) 2) 2) main_~y~0) (<= 0 main_~b~0) (not (= (mod (div (+ (- 1) main_~b~0) 2) 2) 1)))} is VALID [2022-04-08 07:33:57,363 INFO L290 TraceCheckUtils]: 33: Hoare triple {4986#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 4) main_~x~0) (= (div (div (+ (- 1) main_~b~0) 2) 2) main_~y~0) (<= 0 main_~b~0) (not (= (mod (div (+ (- 1) main_~b~0) 2) 2) 1)))} assume !!(#t~post6 < 100);havoc #t~post6; {4986#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 4) main_~x~0) (= (div (div (+ (- 1) main_~b~0) 2) 2) main_~y~0) (<= 0 main_~b~0) (not (= (mod (div (+ (- 1) main_~b~0) 2) 2) 1)))} is VALID [2022-04-08 07:33:57,615 INFO L272 TraceCheckUtils]: 34: Hoare triple {4986#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= (* main_~a~0 4) main_~x~0) (= (div (div (+ (- 1) main_~b~0) 2) 2) main_~y~0) (<= 0 main_~b~0) (not (= (mod (div (+ (- 1) main_~b~0) 2) 2) 1)))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {4996#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 07:33:57,616 INFO L290 TraceCheckUtils]: 35: Hoare triple {4996#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {5000#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:33:57,616 INFO L290 TraceCheckUtils]: 36: Hoare triple {5000#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {4882#false} is VALID [2022-04-08 07:33:57,616 INFO L290 TraceCheckUtils]: 37: Hoare triple {4882#false} assume !false; {4882#false} is VALID [2022-04-08 07:33:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-08 07:33:57,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-08 07:36:35,471 INFO L290 TraceCheckUtils]: 37: Hoare triple {4882#false} assume !false; {4882#false} is VALID [2022-04-08 07:36:35,472 INFO L290 TraceCheckUtils]: 36: Hoare triple {5000#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {4882#false} is VALID [2022-04-08 07:36:35,472 INFO L290 TraceCheckUtils]: 35: Hoare triple {4996#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {5000#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:36:35,473 INFO L272 TraceCheckUtils]: 34: Hoare triple {5016#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {4996#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 07:36:35,473 INFO L290 TraceCheckUtils]: 33: Hoare triple {5016#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} assume !!(#t~post6 < 100);havoc #t~post6; {5016#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:36:35,474 INFO L290 TraceCheckUtils]: 32: Hoare triple {5016#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {5016#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:36:35,482 INFO L290 TraceCheckUtils]: 31: Hoare triple {5026#(and (or (not (< main_~y~0 0)) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (and (not (= (mod main_~y~0 2) 0)) (< main_~y~0 0))))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {5016#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:36:35,483 INFO L290 TraceCheckUtils]: 30: Hoare triple {5030#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {5026#(and (or (not (< main_~y~0 0)) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (and (not (= (mod main_~y~0 2) 0)) (< main_~y~0 0))))} is VALID [2022-04-08 07:36:35,483 INFO L290 TraceCheckUtils]: 29: Hoare triple {5030#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} assume !!(0 != ~y~0); {5030#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} is VALID [2022-04-08 07:36:35,486 INFO L284 TraceCheckUtils]: 28: Hoare quadruple {4969#(not (= |__VERIFIER_assert_#in~cond| 0))} {5037#(or (<= 0 main_~y~0) (not (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0)))} #61#return; {5030#(or (and (<= 0 main_~y~0) (= (mod main_~y~0 2) 1)) (and (or (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (not (= (mod main_~y~0 2) 0)))))} is VALID [2022-04-08 07:36:35,486 INFO L290 TraceCheckUtils]: 27: Hoare triple {4969#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {4969#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:36:35,486 INFO L290 TraceCheckUtils]: 26: Hoare triple {5047#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} assume !(0 == ~cond); {4969#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:36:35,487 INFO L290 TraceCheckUtils]: 25: Hoare triple {4881#true} ~cond := #in~cond; {5047#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-08 07:36:35,487 INFO L272 TraceCheckUtils]: 24: Hoare triple {5037#(or (<= 0 main_~y~0) (not (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0)))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {4881#true} is VALID [2022-04-08 07:36:35,487 INFO L290 TraceCheckUtils]: 23: Hoare triple {5037#(or (<= 0 main_~y~0) (not (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0)))} assume !!(#t~post6 < 100);havoc #t~post6; {5037#(or (<= 0 main_~y~0) (not (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0)))} is VALID [2022-04-08 07:36:35,488 INFO L290 TraceCheckUtils]: 22: Hoare triple {5037#(or (<= 0 main_~y~0) (not (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0)))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {5037#(or (<= 0 main_~y~0) (not (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0)))} is VALID [2022-04-08 07:36:35,575 INFO L290 TraceCheckUtils]: 21: Hoare triple {5060#(forall ((aux_div_v_main_~y~0_94_22 Int)) (or (and (or (<= (+ (* aux_div_v_main_~y~0_94_22 2) 1) (div main_~y~0 2)) (not (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (<= 0 (+ (div main_~y~0 2) 1)) (< (+ (div main_~y~0 2) 1) (* aux_div_v_main_~y~0_94_22 2)) (= (mod main_~y~0 2) 0) (<= (div (+ (- 1) (* (- 1) (div main_~y~0 2))) (- 2)) (+ (div (+ (- 1) (div main_~y~0 2)) 2) 1))) (or (not (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0))) (not (= (mod main_~y~0 2) 0)) (<= (+ (* aux_div_v_main_~y~0_94_22 2) 2) (div main_~y~0 2)) (< (div main_~y~0 2) (* aux_div_v_main_~y~0_94_22 2)) (<= 0 (div main_~y~0 2)) (<= (div (- (div main_~y~0 2)) (- 2)) (+ (div (+ (- 2) (div main_~y~0 2)) 2) 1)))) (= (+ (* (* aux_div_v_main_~y~0_94_22 main_~x~0) 4) main_~z~0 (* main_~x~0 4)) (* main_~b~0 main_~a~0))))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {5037#(or (<= 0 main_~y~0) (not (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0)))} is VALID [2022-04-08 07:36:35,577 INFO L290 TraceCheckUtils]: 20: Hoare triple {4881#true} assume 1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2);~z~0 := ~z~0 + ~x~0;~y~0 := ~y~0 - 1; {5060#(forall ((aux_div_v_main_~y~0_94_22 Int)) (or (and (or (<= (+ (* aux_div_v_main_~y~0_94_22 2) 1) (div main_~y~0 2)) (not (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (<= 0 (+ (div main_~y~0 2) 1)) (< (+ (div main_~y~0 2) 1) (* aux_div_v_main_~y~0_94_22 2)) (= (mod main_~y~0 2) 0) (<= (div (+ (- 1) (* (- 1) (div main_~y~0 2))) (- 2)) (+ (div (+ (- 1) (div main_~y~0 2)) 2) 1))) (or (not (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0))) (not (= (mod main_~y~0 2) 0)) (<= (+ (* aux_div_v_main_~y~0_94_22 2) 2) (div main_~y~0 2)) (< (div main_~y~0 2) (* aux_div_v_main_~y~0_94_22 2)) (<= 0 (div main_~y~0 2)) (<= (div (- (div main_~y~0 2)) (- 2)) (+ (div (+ (- 2) (div main_~y~0 2)) 2) 1)))) (= (+ (* (* aux_div_v_main_~y~0_94_22 main_~x~0) 4) main_~z~0 (* main_~x~0 4)) (* main_~b~0 main_~a~0))))} is VALID [2022-04-08 07:36:35,577 INFO L290 TraceCheckUtils]: 19: Hoare triple {4881#true} assume !!(0 != ~y~0); {4881#true} is VALID [2022-04-08 07:36:35,577 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {4881#true} {4881#true} #61#return; {4881#true} is VALID [2022-04-08 07:36:35,577 INFO L290 TraceCheckUtils]: 17: Hoare triple {4881#true} assume true; {4881#true} is VALID [2022-04-08 07:36:35,577 INFO L290 TraceCheckUtils]: 16: Hoare triple {4881#true} assume !(0 == ~cond); {4881#true} is VALID [2022-04-08 07:36:35,577 INFO L290 TraceCheckUtils]: 15: Hoare triple {4881#true} ~cond := #in~cond; {4881#true} is VALID [2022-04-08 07:36:35,577 INFO L272 TraceCheckUtils]: 14: Hoare triple {4881#true} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {4881#true} is VALID [2022-04-08 07:36:35,577 INFO L290 TraceCheckUtils]: 13: Hoare triple {4881#true} assume !!(#t~post6 < 100);havoc #t~post6; {4881#true} is VALID [2022-04-08 07:36:35,577 INFO L290 TraceCheckUtils]: 12: Hoare triple {4881#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {4881#true} is VALID [2022-04-08 07:36:35,578 INFO L290 TraceCheckUtils]: 11: Hoare triple {4881#true} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {4881#true} is VALID [2022-04-08 07:36:35,578 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {4881#true} {4881#true} #59#return; {4881#true} is VALID [2022-04-08 07:36:35,578 INFO L290 TraceCheckUtils]: 9: Hoare triple {4881#true} assume true; {4881#true} is VALID [2022-04-08 07:36:35,578 INFO L290 TraceCheckUtils]: 8: Hoare triple {4881#true} assume !(0 == ~cond); {4881#true} is VALID [2022-04-08 07:36:35,578 INFO L290 TraceCheckUtils]: 7: Hoare triple {4881#true} ~cond := #in~cond; {4881#true} is VALID [2022-04-08 07:36:35,578 INFO L272 TraceCheckUtils]: 6: Hoare triple {4881#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {4881#true} is VALID [2022-04-08 07:36:35,578 INFO L290 TraceCheckUtils]: 5: Hoare triple {4881#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {4881#true} is VALID [2022-04-08 07:36:35,578 INFO L272 TraceCheckUtils]: 4: Hoare triple {4881#true} call #t~ret7 := main(); {4881#true} is VALID [2022-04-08 07:36:35,578 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {4881#true} {4881#true} #65#return; {4881#true} is VALID [2022-04-08 07:36:35,578 INFO L290 TraceCheckUtils]: 2: Hoare triple {4881#true} assume true; {4881#true} is VALID [2022-04-08 07:36:35,578 INFO L290 TraceCheckUtils]: 1: Hoare triple {4881#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {4881#true} is VALID [2022-04-08 07:36:35,578 INFO L272 TraceCheckUtils]: 0: Hoare triple {4881#true} call ULTIMATE.init(); {4881#true} is VALID [2022-04-08 07:36:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-08 07:36:35,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 07:36:35,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763884067] [2022-04-08 07:36:35,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 07:36:35,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536511001] [2022-04-08 07:36:35,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536511001] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-08 07:36:35,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-08 07:36:35,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-04-08 07:36:35,579 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 07:36:35,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1124524421] [2022-04-08 07:36:35,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1124524421] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:36:35,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:36:35,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-08 07:36:35,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178457894] [2022-04-08 07:36:35,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 07:36:35,580 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-04-08 07:36:35,580 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 07:36:35,580 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:36:35,816 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 38 edges. 38 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:36:35,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-08 07:36:35,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 07:36:35,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-08 07:36:35,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=244, Unknown=2, NotChecked=0, Total=306 [2022-04-08 07:36:35,817 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:36:38,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-08 07:36:43,250 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-08 07:36:45,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-08 07:36:47,819 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-08 07:36:50,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-08 07:36:54,838 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-08 07:37:01,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:37:01,554 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2022-04-08 07:37:01,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-08 07:37:01,554 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-04-08 07:37:01,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 07:37:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:37:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 59 transitions. [2022-04-08 07:37:01,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:37:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 59 transitions. [2022-04-08 07:37:01,557 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 13 states and 59 transitions. [2022-04-08 07:37:03,878 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 59 edges. 58 inductive. 0 not inductive. 1 times theorem prover too weak to decide inductivity. [2022-04-08 07:37:03,879 INFO L225 Difference]: With dead ends: 78 [2022-04-08 07:37:03,879 INFO L226 Difference]: Without dead ends: 76 [2022-04-08 07:37:03,880 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=73, Invalid=305, Unknown=2, NotChecked=0, Total=380 [2022-04-08 07:37:03,880 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 4 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2022-04-08 07:37:03,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 175 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 213 Invalid, 4 Unknown, 0 Unchecked, 16.0s Time] [2022-04-08 07:37:03,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-08 07:37:03,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2022-04-08 07:37:03,983 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 07:37:03,984 INFO L82 GeneralOperation]: Start isEquivalent. First operand 76 states. Second operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-08 07:37:03,984 INFO L74 IsIncluded]: Start isIncluded. First operand 76 states. Second operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-08 07:37:03,984 INFO L87 Difference]: Start difference. First operand 76 states. Second operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-08 07:37:03,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:37:03,986 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-04-08 07:37:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-04-08 07:37:03,986 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:37:03,986 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:37:03,986 INFO L74 IsIncluded]: Start isIncluded. First operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Second operand 76 states. [2022-04-08 07:37:03,987 INFO L87 Difference]: Start difference. First operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Second operand 76 states. [2022-04-08 07:37:03,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:37:03,988 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-04-08 07:37:03,988 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-04-08 07:37:03,988 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:37:03,988 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:37:03,988 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 07:37:03,988 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 07:37:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-08 07:37:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2022-04-08 07:37:03,990 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 38 [2022-04-08 07:37:03,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 07:37:03,990 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2022-04-08 07:37:03,990 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:37:03,990 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 65 states and 70 transitions. [2022-04-08 07:37:15,439 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 70 edges. 65 inductive. 0 not inductive. 5 times theorem prover too weak to decide inductivity. [2022-04-08 07:37:15,440 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2022-04-08 07:37:15,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-08 07:37:15,440 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 07:37:15,440 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 07:37:15,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-08 07:37:15,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-08 07:37:15,644 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 07:37:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 07:37:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1348391320, now seen corresponding path program 3 times [2022-04-08 07:37:15,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 07:37:15,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [362849294] [2022-04-08 07:37:17,616 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 4 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-08 07:37:17,616 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-08 07:37:17,616 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 07:37:17,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1348391320, now seen corresponding path program 4 times [2022-04-08 07:37:17,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 07:37:17,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115106216] [2022-04-08 07:37:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 07:37:17,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 07:37:17,627 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 07:37:17,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [545635501] [2022-04-08 07:37:17,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-08 07:37:17,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:37:17,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 07:37:17,629 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-08 07:37:17,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-08 07:37:17,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-08 07:37:17,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 07:37:17,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-08 07:37:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 07:37:17,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 07:37:24,197 INFO L272 TraceCheckUtils]: 0: Hoare triple {5568#true} call ULTIMATE.init(); {5568#true} is VALID [2022-04-08 07:37:24,197 INFO L290 TraceCheckUtils]: 1: Hoare triple {5568#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {5568#true} is VALID [2022-04-08 07:37:24,198 INFO L290 TraceCheckUtils]: 2: Hoare triple {5568#true} assume true; {5568#true} is VALID [2022-04-08 07:37:24,198 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {5568#true} {5568#true} #65#return; {5568#true} is VALID [2022-04-08 07:37:24,198 INFO L272 TraceCheckUtils]: 4: Hoare triple {5568#true} call #t~ret7 := main(); {5568#true} is VALID [2022-04-08 07:37:24,198 INFO L290 TraceCheckUtils]: 5: Hoare triple {5568#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {5568#true} is VALID [2022-04-08 07:37:24,198 INFO L272 TraceCheckUtils]: 6: Hoare triple {5568#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {5568#true} is VALID [2022-04-08 07:37:24,198 INFO L290 TraceCheckUtils]: 7: Hoare triple {5568#true} ~cond := #in~cond; {5568#true} is VALID [2022-04-08 07:37:24,198 INFO L290 TraceCheckUtils]: 8: Hoare triple {5568#true} assume !(0 == ~cond); {5568#true} is VALID [2022-04-08 07:37:24,198 INFO L290 TraceCheckUtils]: 9: Hoare triple {5568#true} assume true; {5568#true} is VALID [2022-04-08 07:37:24,198 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {5568#true} {5568#true} #59#return; {5568#true} is VALID [2022-04-08 07:37:24,199 INFO L290 TraceCheckUtils]: 11: Hoare triple {5568#true} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {5606#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:37:24,199 INFO L290 TraceCheckUtils]: 12: Hoare triple {5606#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {5606#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:37:24,199 INFO L290 TraceCheckUtils]: 13: Hoare triple {5606#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} assume !!(#t~post6 < 100);havoc #t~post6; {5606#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:37:24,199 INFO L272 TraceCheckUtils]: 14: Hoare triple {5606#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {5568#true} is VALID [2022-04-08 07:37:24,199 INFO L290 TraceCheckUtils]: 15: Hoare triple {5568#true} ~cond := #in~cond; {5568#true} is VALID [2022-04-08 07:37:24,200 INFO L290 TraceCheckUtils]: 16: Hoare triple {5568#true} assume !(0 == ~cond); {5568#true} is VALID [2022-04-08 07:37:24,200 INFO L290 TraceCheckUtils]: 17: Hoare triple {5568#true} assume true; {5568#true} is VALID [2022-04-08 07:37:24,200 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {5568#true} {5606#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} #61#return; {5606#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:37:24,200 INFO L290 TraceCheckUtils]: 19: Hoare triple {5606#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} assume !!(0 != ~y~0); {5631#(and (= main_~z~0 0) (not (= main_~y~0 0)) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:37:24,201 INFO L290 TraceCheckUtils]: 20: Hoare triple {5631#(and (= main_~z~0 0) (not (= main_~y~0 0)) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0))} assume 1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2);~z~0 := ~z~0 + ~x~0;~y~0 := ~y~0 - 1; {5635#(and (= main_~b~0 (+ main_~y~0 1)) (<= 1 (mod main_~b~0 2)) (= main_~z~0 main_~x~0) (<= 0 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:37:24,202 INFO L290 TraceCheckUtils]: 21: Hoare triple {5635#(and (= main_~b~0 (+ main_~y~0 1)) (<= 1 (mod main_~b~0 2)) (= main_~z~0 main_~x~0) (<= 0 main_~b~0) (= main_~a~0 main_~x~0))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {5639#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= main_~x~0 (* main_~z~0 2)) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} is VALID [2022-04-08 07:37:24,203 INFO L290 TraceCheckUtils]: 22: Hoare triple {5639#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= main_~x~0 (* main_~z~0 2)) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {5639#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= main_~x~0 (* main_~z~0 2)) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} is VALID [2022-04-08 07:37:24,203 INFO L290 TraceCheckUtils]: 23: Hoare triple {5639#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= main_~x~0 (* main_~z~0 2)) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} assume !!(#t~post6 < 100);havoc #t~post6; {5639#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= main_~x~0 (* main_~z~0 2)) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} is VALID [2022-04-08 07:37:24,203 INFO L272 TraceCheckUtils]: 24: Hoare triple {5639#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= main_~x~0 (* main_~z~0 2)) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {5568#true} is VALID [2022-04-08 07:37:24,204 INFO L290 TraceCheckUtils]: 25: Hoare triple {5568#true} ~cond := #in~cond; {5652#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:37:24,204 INFO L290 TraceCheckUtils]: 26: Hoare triple {5652#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {5656#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:37:24,204 INFO L290 TraceCheckUtils]: 27: Hoare triple {5656#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {5656#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:37:24,205 INFO L284 TraceCheckUtils]: 28: Hoare quadruple {5656#(not (= |__VERIFIER_assert_#in~cond| 0))} {5639#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= main_~x~0 (* main_~z~0 2)) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} #61#return; {5639#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= main_~x~0 (* main_~z~0 2)) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} is VALID [2022-04-08 07:37:24,206 INFO L290 TraceCheckUtils]: 29: Hoare triple {5639#(and (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= main_~x~0 (* main_~z~0 2)) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} assume !!(0 != ~y~0); {5666#(and (not (= main_~y~0 0)) (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= main_~x~0 (* main_~z~0 2)) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} is VALID [2022-04-08 07:37:24,207 INFO L290 TraceCheckUtils]: 30: Hoare triple {5666#(and (not (= main_~y~0 0)) (= main_~a~0 main_~z~0) (<= 1 (mod main_~b~0 2)) (= main_~x~0 (* main_~z~0 2)) (<= 0 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0))} assume 1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2);~z~0 := ~z~0 + ~x~0;~y~0 := ~y~0 - 1; {5670#(and (<= 1 (mod main_~b~0 2)) (= (+ main_~a~0 main_~x~0) main_~z~0) (= (* main_~a~0 2) main_~x~0) (= (div (+ (- 1) main_~b~0) 2) (+ main_~y~0 1)) (<= 1 (mod (div (+ (- 1) main_~b~0) 2) 2)) (<= 0 main_~b~0))} is VALID [2022-04-08 07:37:24,209 INFO L290 TraceCheckUtils]: 31: Hoare triple {5670#(and (<= 1 (mod main_~b~0 2)) (= (+ main_~a~0 main_~x~0) main_~z~0) (= (* main_~a~0 2) main_~x~0) (= (div (+ (- 1) main_~b~0) 2) (+ main_~y~0 1)) (<= 1 (mod (div (+ (- 1) main_~b~0) 2) 2)) (<= 0 main_~b~0))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {5674#(and (= main_~x~0 (+ (* main_~z~0 2) (* (- 2) main_~a~0))) (= (* main_~a~0 2) (+ (* (- 1) main_~a~0) main_~z~0)) (<= 1 (mod main_~b~0 2)) (= (div (+ (- 1) (div (+ (- 1) main_~b~0) 2)) 2) main_~y~0) (<= 1 (mod (div (+ (- 1) main_~b~0) 2) 2)) (<= 0 main_~b~0))} is VALID [2022-04-08 07:37:24,210 INFO L290 TraceCheckUtils]: 32: Hoare triple {5674#(and (= main_~x~0 (+ (* main_~z~0 2) (* (- 2) main_~a~0))) (= (* main_~a~0 2) (+ (* (- 1) main_~a~0) main_~z~0)) (<= 1 (mod main_~b~0 2)) (= (div (+ (- 1) (div (+ (- 1) main_~b~0) 2)) 2) main_~y~0) (<= 1 (mod (div (+ (- 1) main_~b~0) 2) 2)) (<= 0 main_~b~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {5674#(and (= main_~x~0 (+ (* main_~z~0 2) (* (- 2) main_~a~0))) (= (* main_~a~0 2) (+ (* (- 1) main_~a~0) main_~z~0)) (<= 1 (mod main_~b~0 2)) (= (div (+ (- 1) (div (+ (- 1) main_~b~0) 2)) 2) main_~y~0) (<= 1 (mod (div (+ (- 1) main_~b~0) 2) 2)) (<= 0 main_~b~0))} is VALID [2022-04-08 07:37:24,211 INFO L290 TraceCheckUtils]: 33: Hoare triple {5674#(and (= main_~x~0 (+ (* main_~z~0 2) (* (- 2) main_~a~0))) (= (* main_~a~0 2) (+ (* (- 1) main_~a~0) main_~z~0)) (<= 1 (mod main_~b~0 2)) (= (div (+ (- 1) (div (+ (- 1) main_~b~0) 2)) 2) main_~y~0) (<= 1 (mod (div (+ (- 1) main_~b~0) 2) 2)) (<= 0 main_~b~0))} assume !!(#t~post6 < 100);havoc #t~post6; {5674#(and (= main_~x~0 (+ (* main_~z~0 2) (* (- 2) main_~a~0))) (= (* main_~a~0 2) (+ (* (- 1) main_~a~0) main_~z~0)) (<= 1 (mod main_~b~0 2)) (= (div (+ (- 1) (div (+ (- 1) main_~b~0) 2)) 2) main_~y~0) (<= 1 (mod (div (+ (- 1) main_~b~0) 2) 2)) (<= 0 main_~b~0))} is VALID [2022-04-08 07:37:24,485 INFO L272 TraceCheckUtils]: 34: Hoare triple {5674#(and (= main_~x~0 (+ (* main_~z~0 2) (* (- 2) main_~a~0))) (= (* main_~a~0 2) (+ (* (- 1) main_~a~0) main_~z~0)) (<= 1 (mod main_~b~0 2)) (= (div (+ (- 1) (div (+ (- 1) main_~b~0) 2)) 2) main_~y~0) (<= 1 (mod (div (+ (- 1) main_~b~0) 2) 2)) (<= 0 main_~b~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {5684#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 07:37:24,486 INFO L290 TraceCheckUtils]: 35: Hoare triple {5684#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {5688#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:37:24,486 INFO L290 TraceCheckUtils]: 36: Hoare triple {5688#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {5569#false} is VALID [2022-04-08 07:37:24,487 INFO L290 TraceCheckUtils]: 37: Hoare triple {5569#false} assume !false; {5569#false} is VALID [2022-04-08 07:37:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-08 07:37:24,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-08 07:38:32,176 INFO L290 TraceCheckUtils]: 37: Hoare triple {5569#false} assume !false; {5569#false} is VALID [2022-04-08 07:38:32,177 INFO L290 TraceCheckUtils]: 36: Hoare triple {5688#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {5569#false} is VALID [2022-04-08 07:38:32,177 INFO L290 TraceCheckUtils]: 35: Hoare triple {5684#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {5688#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:38:32,178 INFO L272 TraceCheckUtils]: 34: Hoare triple {5704#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {5684#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 07:38:32,178 INFO L290 TraceCheckUtils]: 33: Hoare triple {5704#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} assume !!(#t~post6 < 100);havoc #t~post6; {5704#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:38:32,179 INFO L290 TraceCheckUtils]: 32: Hoare triple {5704#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {5704#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:38:32,184 INFO L290 TraceCheckUtils]: 31: Hoare triple {5714#(and (or (not (< main_~y~0 0)) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (and (not (= (mod main_~y~0 2) 0)) (< main_~y~0 0))))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {5704#(= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0))} is VALID [2022-04-08 07:38:32,186 INFO L290 TraceCheckUtils]: 30: Hoare triple {5718#(or (= (+ (* (* main_~x~0 2) (div (+ (- 1) main_~y~0) 2)) main_~z~0 main_~x~0) (* main_~b~0 main_~a~0)) (not (<= 1 (mod main_~y~0 2))) (< main_~y~0 0))} assume 1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2);~z~0 := ~z~0 + ~x~0;~y~0 := ~y~0 - 1; {5714#(and (or (not (< main_~y~0 0)) (= (mod main_~y~0 2) 0) (= (+ main_~z~0 (* (* main_~x~0 2) (+ (div main_~y~0 2) 1))) (* main_~b~0 main_~a~0))) (or (= (+ main_~z~0 (* (* main_~x~0 2) (div main_~y~0 2))) (* main_~b~0 main_~a~0)) (and (not (= (mod main_~y~0 2) 0)) (< main_~y~0 0))))} is VALID [2022-04-08 07:38:32,186 INFO L290 TraceCheckUtils]: 29: Hoare triple {5718#(or (= (+ (* (* main_~x~0 2) (div (+ (- 1) main_~y~0) 2)) main_~z~0 main_~x~0) (* main_~b~0 main_~a~0)) (not (<= 1 (mod main_~y~0 2))) (< main_~y~0 0))} assume !!(0 != ~y~0); {5718#(or (= (+ (* (* main_~x~0 2) (div (+ (- 1) main_~y~0) 2)) main_~z~0 main_~x~0) (* main_~b~0 main_~a~0)) (not (<= 1 (mod main_~y~0 2))) (< main_~y~0 0))} is VALID [2022-04-08 07:38:33,450 INFO L284 TraceCheckUtils]: 28: Hoare quadruple {5656#(not (= |__VERIFIER_assert_#in~cond| 0))} {5568#true} #61#return; {5718#(or (= (+ (* (* main_~x~0 2) (div (+ (- 1) main_~y~0) 2)) main_~z~0 main_~x~0) (* main_~b~0 main_~a~0)) (not (<= 1 (mod main_~y~0 2))) (< main_~y~0 0))} is VALID [2022-04-08 07:38:33,451 INFO L290 TraceCheckUtils]: 27: Hoare triple {5656#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {5656#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:38:33,451 INFO L290 TraceCheckUtils]: 26: Hoare triple {5734#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} assume !(0 == ~cond); {5656#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:38:33,452 INFO L290 TraceCheckUtils]: 25: Hoare triple {5568#true} ~cond := #in~cond; {5734#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-08 07:38:33,452 INFO L272 TraceCheckUtils]: 24: Hoare triple {5568#true} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {5568#true} is VALID [2022-04-08 07:38:33,452 INFO L290 TraceCheckUtils]: 23: Hoare triple {5568#true} assume !!(#t~post6 < 100);havoc #t~post6; {5568#true} is VALID [2022-04-08 07:38:33,452 INFO L290 TraceCheckUtils]: 22: Hoare triple {5568#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {5568#true} is VALID [2022-04-08 07:38:33,452 INFO L290 TraceCheckUtils]: 21: Hoare triple {5568#true} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {5568#true} is VALID [2022-04-08 07:38:33,452 INFO L290 TraceCheckUtils]: 20: Hoare triple {5568#true} assume 1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2);~z~0 := ~z~0 + ~x~0;~y~0 := ~y~0 - 1; {5568#true} is VALID [2022-04-08 07:38:33,452 INFO L290 TraceCheckUtils]: 19: Hoare triple {5568#true} assume !!(0 != ~y~0); {5568#true} is VALID [2022-04-08 07:38:33,452 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {5568#true} {5568#true} #61#return; {5568#true} is VALID [2022-04-08 07:38:33,452 INFO L290 TraceCheckUtils]: 17: Hoare triple {5568#true} assume true; {5568#true} is VALID [2022-04-08 07:38:33,452 INFO L290 TraceCheckUtils]: 16: Hoare triple {5568#true} assume !(0 == ~cond); {5568#true} is VALID [2022-04-08 07:38:33,452 INFO L290 TraceCheckUtils]: 15: Hoare triple {5568#true} ~cond := #in~cond; {5568#true} is VALID [2022-04-08 07:38:33,453 INFO L272 TraceCheckUtils]: 14: Hoare triple {5568#true} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {5568#true} is VALID [2022-04-08 07:38:33,453 INFO L290 TraceCheckUtils]: 13: Hoare triple {5568#true} assume !!(#t~post6 < 100);havoc #t~post6; {5568#true} is VALID [2022-04-08 07:38:33,453 INFO L290 TraceCheckUtils]: 12: Hoare triple {5568#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {5568#true} is VALID [2022-04-08 07:38:33,453 INFO L290 TraceCheckUtils]: 11: Hoare triple {5568#true} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {5568#true} is VALID [2022-04-08 07:38:33,453 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {5568#true} {5568#true} #59#return; {5568#true} is VALID [2022-04-08 07:38:33,453 INFO L290 TraceCheckUtils]: 9: Hoare triple {5568#true} assume true; {5568#true} is VALID [2022-04-08 07:38:33,453 INFO L290 TraceCheckUtils]: 8: Hoare triple {5568#true} assume !(0 == ~cond); {5568#true} is VALID [2022-04-08 07:38:33,453 INFO L290 TraceCheckUtils]: 7: Hoare triple {5568#true} ~cond := #in~cond; {5568#true} is VALID [2022-04-08 07:38:33,453 INFO L272 TraceCheckUtils]: 6: Hoare triple {5568#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {5568#true} is VALID [2022-04-08 07:38:33,453 INFO L290 TraceCheckUtils]: 5: Hoare triple {5568#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {5568#true} is VALID [2022-04-08 07:38:33,453 INFO L272 TraceCheckUtils]: 4: Hoare triple {5568#true} call #t~ret7 := main(); {5568#true} is VALID [2022-04-08 07:38:33,453 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {5568#true} {5568#true} #65#return; {5568#true} is VALID [2022-04-08 07:38:33,453 INFO L290 TraceCheckUtils]: 2: Hoare triple {5568#true} assume true; {5568#true} is VALID [2022-04-08 07:38:33,454 INFO L290 TraceCheckUtils]: 1: Hoare triple {5568#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {5568#true} is VALID [2022-04-08 07:38:33,454 INFO L272 TraceCheckUtils]: 0: Hoare triple {5568#true} call ULTIMATE.init(); {5568#true} is VALID [2022-04-08 07:38:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-08 07:38:33,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 07:38:33,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115106216] [2022-04-08 07:38:33,454 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 07:38:33,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545635501] [2022-04-08 07:38:33,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545635501] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-08 07:38:33,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-08 07:38:33,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2022-04-08 07:38:33,455 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 07:38:33,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [362849294] [2022-04-08 07:38:33,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [362849294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:38:33,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:38:33,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-08 07:38:33,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118843223] [2022-04-08 07:38:33,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 07:38:33,455 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-04-08 07:38:33,455 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 07:38:33,455 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:38:35,493 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 38 edges. 37 inductive. 0 not inductive. 1 times theorem prover too weak to decide inductivity. [2022-04-08 07:38:35,493 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-08 07:38:35,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 07:38:35,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-08 07:38:35,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=218, Unknown=2, NotChecked=0, Total=272 [2022-04-08 07:38:35,494 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:38:41,075 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 [] [2022-04-08 07:38:51,172 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-08 07:38:58,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-08 07:39:00,285 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-08 07:39:11,976 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-08 07:39:12,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:39:12,218 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2022-04-08 07:39:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-08 07:39:12,219 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-04-08 07:39:12,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 07:39:12,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:39:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 58 transitions. [2022-04-08 07:39:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:39:12,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 58 transitions. [2022-04-08 07:39:12,221 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 13 states and 58 transitions. [2022-04-08 07:39:14,266 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 58 edges. 58 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:39:14,267 INFO L225 Difference]: With dead ends: 76 [2022-04-08 07:39:14,267 INFO L226 Difference]: Without dead ends: 74 [2022-04-08 07:39:14,268 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=65, Invalid=275, Unknown=2, NotChecked=0, Total=342 [2022-04-08 07:39:14,268 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-04-08 07:39:14,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 209 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 2 Unknown, 0 Unchecked, 14.9s Time] [2022-04-08 07:39:14,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-08 07:39:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2022-04-08 07:39:14,335 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 07:39:14,335 INFO L82 GeneralOperation]: Start isEquivalent. First operand 74 states. Second operand has 52 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 07:39:14,335 INFO L74 IsIncluded]: Start isIncluded. First operand 74 states. Second operand has 52 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 07:39:14,335 INFO L87 Difference]: Start difference. First operand 74 states. Second operand has 52 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 07:39:14,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:39:14,336 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-04-08 07:39:14,336 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2022-04-08 07:39:14,336 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:39:14,336 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:39:14,337 INFO L74 IsIncluded]: Start isIncluded. First operand has 52 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Second operand 74 states. [2022-04-08 07:39:14,337 INFO L87 Difference]: Start difference. First operand has 52 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Second operand 74 states. [2022-04-08 07:39:14,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:39:14,338 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-04-08 07:39:14,338 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2022-04-08 07:39:14,338 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:39:14,338 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:39:14,339 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 07:39:14,339 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 07:39:14,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 07:39:14,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-04-08 07:39:14,340 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 38 [2022-04-08 07:39:14,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 07:39:14,340 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-04-08 07:39:14,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-04-08 07:39:14,340 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 52 states and 56 transitions. [2022-04-08 07:39:24,589 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 56 edges. 51 inductive. 0 not inductive. 5 times theorem prover too weak to decide inductivity. [2022-04-08 07:39:24,589 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-04-08 07:39:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-08 07:39:24,589 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 07:39:24,590 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 07:39:24,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-08 07:39:24,790 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-08 07:39:24,790 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 07:39:24,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 07:39:24,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1258071893, now seen corresponding path program 5 times [2022-04-08 07:39:24,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 07:39:24,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [44264627] [2022-04-08 07:39:27,074 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-08 07:39:27,075 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-08 07:39:27,075 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 07:39:27,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1258071893, now seen corresponding path program 6 times [2022-04-08 07:39:27,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 07:39:27,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41727031] [2022-04-08 07:39:27,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 07:39:27,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 07:39:27,086 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 07:39:27,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441364759] [2022-04-08 07:39:27,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-08 07:39:27,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:39:27,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 07:39:27,091 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-08 07:39:27,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-08 07:39:27,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-08 07:39:27,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 07:39:27,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-08 07:39:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 07:39:27,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 07:39:27,346 INFO L272 TraceCheckUtils]: 0: Hoare triple {6220#true} call ULTIMATE.init(); {6220#true} is VALID [2022-04-08 07:39:27,347 INFO L290 TraceCheckUtils]: 1: Hoare triple {6220#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {6228#(<= ~counter~0 0)} is VALID [2022-04-08 07:39:27,347 INFO L290 TraceCheckUtils]: 2: Hoare triple {6228#(<= ~counter~0 0)} assume true; {6228#(<= ~counter~0 0)} is VALID [2022-04-08 07:39:27,347 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {6228#(<= ~counter~0 0)} {6220#true} #65#return; {6228#(<= ~counter~0 0)} is VALID [2022-04-08 07:39:27,348 INFO L272 TraceCheckUtils]: 4: Hoare triple {6228#(<= ~counter~0 0)} call #t~ret7 := main(); {6228#(<= ~counter~0 0)} is VALID [2022-04-08 07:39:27,348 INFO L290 TraceCheckUtils]: 5: Hoare triple {6228#(<= ~counter~0 0)} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {6228#(<= ~counter~0 0)} is VALID [2022-04-08 07:39:27,348 INFO L272 TraceCheckUtils]: 6: Hoare triple {6228#(<= ~counter~0 0)} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {6228#(<= ~counter~0 0)} is VALID [2022-04-08 07:39:27,348 INFO L290 TraceCheckUtils]: 7: Hoare triple {6228#(<= ~counter~0 0)} ~cond := #in~cond; {6228#(<= ~counter~0 0)} is VALID [2022-04-08 07:39:27,349 INFO L290 TraceCheckUtils]: 8: Hoare triple {6228#(<= ~counter~0 0)} assume !(0 == ~cond); {6228#(<= ~counter~0 0)} is VALID [2022-04-08 07:39:27,349 INFO L290 TraceCheckUtils]: 9: Hoare triple {6228#(<= ~counter~0 0)} assume true; {6228#(<= ~counter~0 0)} is VALID [2022-04-08 07:39:27,350 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {6228#(<= ~counter~0 0)} {6228#(<= ~counter~0 0)} #59#return; {6228#(<= ~counter~0 0)} is VALID [2022-04-08 07:39:27,350 INFO L290 TraceCheckUtils]: 11: Hoare triple {6228#(<= ~counter~0 0)} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {6228#(<= ~counter~0 0)} is VALID [2022-04-08 07:39:27,351 INFO L290 TraceCheckUtils]: 12: Hoare triple {6228#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {6262#(<= ~counter~0 1)} is VALID [2022-04-08 07:39:27,351 INFO L290 TraceCheckUtils]: 13: Hoare triple {6262#(<= ~counter~0 1)} assume !!(#t~post6 < 100);havoc #t~post6; {6262#(<= ~counter~0 1)} is VALID [2022-04-08 07:39:27,352 INFO L272 TraceCheckUtils]: 14: Hoare triple {6262#(<= ~counter~0 1)} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {6262#(<= ~counter~0 1)} is VALID [2022-04-08 07:39:27,352 INFO L290 TraceCheckUtils]: 15: Hoare triple {6262#(<= ~counter~0 1)} ~cond := #in~cond; {6262#(<= ~counter~0 1)} is VALID [2022-04-08 07:39:27,352 INFO L290 TraceCheckUtils]: 16: Hoare triple {6262#(<= ~counter~0 1)} assume !(0 == ~cond); {6262#(<= ~counter~0 1)} is VALID [2022-04-08 07:39:27,352 INFO L290 TraceCheckUtils]: 17: Hoare triple {6262#(<= ~counter~0 1)} assume true; {6262#(<= ~counter~0 1)} is VALID [2022-04-08 07:39:27,353 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {6262#(<= ~counter~0 1)} {6262#(<= ~counter~0 1)} #61#return; {6262#(<= ~counter~0 1)} is VALID [2022-04-08 07:39:27,353 INFO L290 TraceCheckUtils]: 19: Hoare triple {6262#(<= ~counter~0 1)} assume !!(0 != ~y~0); {6262#(<= ~counter~0 1)} is VALID [2022-04-08 07:39:27,353 INFO L290 TraceCheckUtils]: 20: Hoare triple {6262#(<= ~counter~0 1)} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {6262#(<= ~counter~0 1)} is VALID [2022-04-08 07:39:27,354 INFO L290 TraceCheckUtils]: 21: Hoare triple {6262#(<= ~counter~0 1)} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {6262#(<= ~counter~0 1)} is VALID [2022-04-08 07:39:27,354 INFO L290 TraceCheckUtils]: 22: Hoare triple {6262#(<= ~counter~0 1)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {6293#(<= ~counter~0 2)} is VALID [2022-04-08 07:39:27,355 INFO L290 TraceCheckUtils]: 23: Hoare triple {6293#(<= ~counter~0 2)} assume !!(#t~post6 < 100);havoc #t~post6; {6293#(<= ~counter~0 2)} is VALID [2022-04-08 07:39:27,355 INFO L272 TraceCheckUtils]: 24: Hoare triple {6293#(<= ~counter~0 2)} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {6293#(<= ~counter~0 2)} is VALID [2022-04-08 07:39:27,355 INFO L290 TraceCheckUtils]: 25: Hoare triple {6293#(<= ~counter~0 2)} ~cond := #in~cond; {6293#(<= ~counter~0 2)} is VALID [2022-04-08 07:39:27,356 INFO L290 TraceCheckUtils]: 26: Hoare triple {6293#(<= ~counter~0 2)} assume !(0 == ~cond); {6293#(<= ~counter~0 2)} is VALID [2022-04-08 07:39:27,356 INFO L290 TraceCheckUtils]: 27: Hoare triple {6293#(<= ~counter~0 2)} assume true; {6293#(<= ~counter~0 2)} is VALID [2022-04-08 07:39:27,356 INFO L284 TraceCheckUtils]: 28: Hoare quadruple {6293#(<= ~counter~0 2)} {6293#(<= ~counter~0 2)} #61#return; {6293#(<= ~counter~0 2)} is VALID [2022-04-08 07:39:27,357 INFO L290 TraceCheckUtils]: 29: Hoare triple {6293#(<= ~counter~0 2)} assume !!(0 != ~y~0); {6293#(<= ~counter~0 2)} is VALID [2022-04-08 07:39:27,357 INFO L290 TraceCheckUtils]: 30: Hoare triple {6293#(<= ~counter~0 2)} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {6293#(<= ~counter~0 2)} is VALID [2022-04-08 07:39:27,357 INFO L290 TraceCheckUtils]: 31: Hoare triple {6293#(<= ~counter~0 2)} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {6293#(<= ~counter~0 2)} is VALID [2022-04-08 07:39:27,358 INFO L290 TraceCheckUtils]: 32: Hoare triple {6293#(<= ~counter~0 2)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {6324#(<= ~counter~0 3)} is VALID [2022-04-08 07:39:27,358 INFO L290 TraceCheckUtils]: 33: Hoare triple {6324#(<= ~counter~0 3)} assume !!(#t~post6 < 100);havoc #t~post6; {6324#(<= ~counter~0 3)} is VALID [2022-04-08 07:39:27,359 INFO L272 TraceCheckUtils]: 34: Hoare triple {6324#(<= ~counter~0 3)} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {6324#(<= ~counter~0 3)} is VALID [2022-04-08 07:39:27,359 INFO L290 TraceCheckUtils]: 35: Hoare triple {6324#(<= ~counter~0 3)} ~cond := #in~cond; {6324#(<= ~counter~0 3)} is VALID [2022-04-08 07:39:27,359 INFO L290 TraceCheckUtils]: 36: Hoare triple {6324#(<= ~counter~0 3)} assume !(0 == ~cond); {6324#(<= ~counter~0 3)} is VALID [2022-04-08 07:39:27,359 INFO L290 TraceCheckUtils]: 37: Hoare triple {6324#(<= ~counter~0 3)} assume true; {6324#(<= ~counter~0 3)} is VALID [2022-04-08 07:39:27,360 INFO L284 TraceCheckUtils]: 38: Hoare quadruple {6324#(<= ~counter~0 3)} {6324#(<= ~counter~0 3)} #61#return; {6324#(<= ~counter~0 3)} is VALID [2022-04-08 07:39:27,360 INFO L290 TraceCheckUtils]: 39: Hoare triple {6324#(<= ~counter~0 3)} assume !!(0 != ~y~0); {6324#(<= ~counter~0 3)} is VALID [2022-04-08 07:39:27,360 INFO L290 TraceCheckUtils]: 40: Hoare triple {6324#(<= ~counter~0 3)} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {6324#(<= ~counter~0 3)} is VALID [2022-04-08 07:39:27,361 INFO L290 TraceCheckUtils]: 41: Hoare triple {6324#(<= ~counter~0 3)} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {6324#(<= ~counter~0 3)} is VALID [2022-04-08 07:39:27,361 INFO L290 TraceCheckUtils]: 42: Hoare triple {6324#(<= ~counter~0 3)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {6355#(<= |main_#t~post6| 3)} is VALID [2022-04-08 07:39:27,361 INFO L290 TraceCheckUtils]: 43: Hoare triple {6355#(<= |main_#t~post6| 3)} assume !(#t~post6 < 100);havoc #t~post6; {6221#false} is VALID [2022-04-08 07:39:27,361 INFO L272 TraceCheckUtils]: 44: Hoare triple {6221#false} call __VERIFIER_assert((if ~z~0 == ~a~0 * ~b~0 then 1 else 0)); {6221#false} is VALID [2022-04-08 07:39:27,362 INFO L290 TraceCheckUtils]: 45: Hoare triple {6221#false} ~cond := #in~cond; {6221#false} is VALID [2022-04-08 07:39:27,362 INFO L290 TraceCheckUtils]: 46: Hoare triple {6221#false} assume 0 == ~cond; {6221#false} is VALID [2022-04-08 07:39:27,362 INFO L290 TraceCheckUtils]: 47: Hoare triple {6221#false} assume !false; {6221#false} is VALID [2022-04-08 07:39:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-08 07:39:27,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-08 07:39:27,601 INFO L290 TraceCheckUtils]: 47: Hoare triple {6221#false} assume !false; {6221#false} is VALID [2022-04-08 07:39:27,602 INFO L290 TraceCheckUtils]: 46: Hoare triple {6221#false} assume 0 == ~cond; {6221#false} is VALID [2022-04-08 07:39:27,602 INFO L290 TraceCheckUtils]: 45: Hoare triple {6221#false} ~cond := #in~cond; {6221#false} is VALID [2022-04-08 07:39:27,602 INFO L272 TraceCheckUtils]: 44: Hoare triple {6221#false} call __VERIFIER_assert((if ~z~0 == ~a~0 * ~b~0 then 1 else 0)); {6221#false} is VALID [2022-04-08 07:39:27,602 INFO L290 TraceCheckUtils]: 43: Hoare triple {6383#(< |main_#t~post6| 100)} assume !(#t~post6 < 100);havoc #t~post6; {6221#false} is VALID [2022-04-08 07:39:27,602 INFO L290 TraceCheckUtils]: 42: Hoare triple {6387#(< ~counter~0 100)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {6383#(< |main_#t~post6| 100)} is VALID [2022-04-08 07:39:27,603 INFO L290 TraceCheckUtils]: 41: Hoare triple {6387#(< ~counter~0 100)} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {6387#(< ~counter~0 100)} is VALID [2022-04-08 07:39:27,603 INFO L290 TraceCheckUtils]: 40: Hoare triple {6387#(< ~counter~0 100)} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {6387#(< ~counter~0 100)} is VALID [2022-04-08 07:39:27,603 INFO L290 TraceCheckUtils]: 39: Hoare triple {6387#(< ~counter~0 100)} assume !!(0 != ~y~0); {6387#(< ~counter~0 100)} is VALID [2022-04-08 07:39:27,604 INFO L284 TraceCheckUtils]: 38: Hoare quadruple {6220#true} {6387#(< ~counter~0 100)} #61#return; {6387#(< ~counter~0 100)} is VALID [2022-04-08 07:39:27,604 INFO L290 TraceCheckUtils]: 37: Hoare triple {6220#true} assume true; {6220#true} is VALID [2022-04-08 07:39:27,604 INFO L290 TraceCheckUtils]: 36: Hoare triple {6220#true} assume !(0 == ~cond); {6220#true} is VALID [2022-04-08 07:39:27,604 INFO L290 TraceCheckUtils]: 35: Hoare triple {6220#true} ~cond := #in~cond; {6220#true} is VALID [2022-04-08 07:39:27,604 INFO L272 TraceCheckUtils]: 34: Hoare triple {6387#(< ~counter~0 100)} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {6220#true} is VALID [2022-04-08 07:39:27,604 INFO L290 TraceCheckUtils]: 33: Hoare triple {6387#(< ~counter~0 100)} assume !!(#t~post6 < 100);havoc #t~post6; {6387#(< ~counter~0 100)} is VALID [2022-04-08 07:39:27,605 INFO L290 TraceCheckUtils]: 32: Hoare triple {6418#(< ~counter~0 99)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {6387#(< ~counter~0 100)} is VALID [2022-04-08 07:39:27,605 INFO L290 TraceCheckUtils]: 31: Hoare triple {6418#(< ~counter~0 99)} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {6418#(< ~counter~0 99)} is VALID [2022-04-08 07:39:27,606 INFO L290 TraceCheckUtils]: 30: Hoare triple {6418#(< ~counter~0 99)} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {6418#(< ~counter~0 99)} is VALID [2022-04-08 07:39:27,607 INFO L290 TraceCheckUtils]: 29: Hoare triple {6418#(< ~counter~0 99)} assume !!(0 != ~y~0); {6418#(< ~counter~0 99)} is VALID [2022-04-08 07:39:27,608 INFO L284 TraceCheckUtils]: 28: Hoare quadruple {6220#true} {6418#(< ~counter~0 99)} #61#return; {6418#(< ~counter~0 99)} is VALID [2022-04-08 07:39:27,608 INFO L290 TraceCheckUtils]: 27: Hoare triple {6220#true} assume true; {6220#true} is VALID [2022-04-08 07:39:27,608 INFO L290 TraceCheckUtils]: 26: Hoare triple {6220#true} assume !(0 == ~cond); {6220#true} is VALID [2022-04-08 07:39:27,608 INFO L290 TraceCheckUtils]: 25: Hoare triple {6220#true} ~cond := #in~cond; {6220#true} is VALID [2022-04-08 07:39:27,608 INFO L272 TraceCheckUtils]: 24: Hoare triple {6418#(< ~counter~0 99)} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {6220#true} is VALID [2022-04-08 07:39:27,609 INFO L290 TraceCheckUtils]: 23: Hoare triple {6418#(< ~counter~0 99)} assume !!(#t~post6 < 100);havoc #t~post6; {6418#(< ~counter~0 99)} is VALID [2022-04-08 07:39:27,609 INFO L290 TraceCheckUtils]: 22: Hoare triple {6449#(< ~counter~0 98)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {6418#(< ~counter~0 99)} is VALID [2022-04-08 07:39:27,610 INFO L290 TraceCheckUtils]: 21: Hoare triple {6449#(< ~counter~0 98)} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {6449#(< ~counter~0 98)} is VALID [2022-04-08 07:39:27,610 INFO L290 TraceCheckUtils]: 20: Hoare triple {6449#(< ~counter~0 98)} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {6449#(< ~counter~0 98)} is VALID [2022-04-08 07:39:27,610 INFO L290 TraceCheckUtils]: 19: Hoare triple {6449#(< ~counter~0 98)} assume !!(0 != ~y~0); {6449#(< ~counter~0 98)} is VALID [2022-04-08 07:39:27,611 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {6220#true} {6449#(< ~counter~0 98)} #61#return; {6449#(< ~counter~0 98)} is VALID [2022-04-08 07:39:27,611 INFO L290 TraceCheckUtils]: 17: Hoare triple {6220#true} assume true; {6220#true} is VALID [2022-04-08 07:39:27,611 INFO L290 TraceCheckUtils]: 16: Hoare triple {6220#true} assume !(0 == ~cond); {6220#true} is VALID [2022-04-08 07:39:27,611 INFO L290 TraceCheckUtils]: 15: Hoare triple {6220#true} ~cond := #in~cond; {6220#true} is VALID [2022-04-08 07:39:27,611 INFO L272 TraceCheckUtils]: 14: Hoare triple {6449#(< ~counter~0 98)} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {6220#true} is VALID [2022-04-08 07:39:27,612 INFO L290 TraceCheckUtils]: 13: Hoare triple {6449#(< ~counter~0 98)} assume !!(#t~post6 < 100);havoc #t~post6; {6449#(< ~counter~0 98)} is VALID [2022-04-08 07:39:27,612 INFO L290 TraceCheckUtils]: 12: Hoare triple {6480#(< ~counter~0 97)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {6449#(< ~counter~0 98)} is VALID [2022-04-08 07:39:27,613 INFO L290 TraceCheckUtils]: 11: Hoare triple {6480#(< ~counter~0 97)} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {6480#(< ~counter~0 97)} is VALID [2022-04-08 07:39:27,613 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {6220#true} {6480#(< ~counter~0 97)} #59#return; {6480#(< ~counter~0 97)} is VALID [2022-04-08 07:39:27,613 INFO L290 TraceCheckUtils]: 9: Hoare triple {6220#true} assume true; {6220#true} is VALID [2022-04-08 07:39:27,613 INFO L290 TraceCheckUtils]: 8: Hoare triple {6220#true} assume !(0 == ~cond); {6220#true} is VALID [2022-04-08 07:39:27,614 INFO L290 TraceCheckUtils]: 7: Hoare triple {6220#true} ~cond := #in~cond; {6220#true} is VALID [2022-04-08 07:39:27,614 INFO L272 TraceCheckUtils]: 6: Hoare triple {6480#(< ~counter~0 97)} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {6220#true} is VALID [2022-04-08 07:39:27,614 INFO L290 TraceCheckUtils]: 5: Hoare triple {6480#(< ~counter~0 97)} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {6480#(< ~counter~0 97)} is VALID [2022-04-08 07:39:27,614 INFO L272 TraceCheckUtils]: 4: Hoare triple {6480#(< ~counter~0 97)} call #t~ret7 := main(); {6480#(< ~counter~0 97)} is VALID [2022-04-08 07:39:27,615 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {6480#(< ~counter~0 97)} {6220#true} #65#return; {6480#(< ~counter~0 97)} is VALID [2022-04-08 07:39:27,615 INFO L290 TraceCheckUtils]: 2: Hoare triple {6480#(< ~counter~0 97)} assume true; {6480#(< ~counter~0 97)} is VALID [2022-04-08 07:39:27,616 INFO L290 TraceCheckUtils]: 1: Hoare triple {6220#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {6480#(< ~counter~0 97)} is VALID [2022-04-08 07:39:27,616 INFO L272 TraceCheckUtils]: 0: Hoare triple {6220#true} call ULTIMATE.init(); {6220#true} is VALID [2022-04-08 07:39:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-08 07:39:27,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 07:39:27,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41727031] [2022-04-08 07:39:27,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 07:39:27,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441364759] [2022-04-08 07:39:27,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441364759] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-08 07:39:27,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-08 07:39:27,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-08 07:39:27,617 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 07:39:27,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [44264627] [2022-04-08 07:39:27,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [44264627] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 07:39:27,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 07:39:27,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-08 07:39:27,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863787265] [2022-04-08 07:39:27,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 07:39:27,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 48 [2022-04-08 07:39:27,618 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 07:39:27,618 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:39:27,655 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 48 edges. 48 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:39:27,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-08 07:39:27,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 07:39:27,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-08 07:39:27,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-04-08 07:39:27,656 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:39:27,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:39:27,827 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2022-04-08 07:39:27,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-08 07:39:27,827 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 48 [2022-04-08 07:39:27,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 07:39:27,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:39:27,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 69 transitions. [2022-04-08 07:39:27,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:39:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 69 transitions. [2022-04-08 07:39:27,830 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 10 states and 69 transitions. [2022-04-08 07:39:27,875 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 69 edges. 69 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 07:39:27,878 INFO L225 Difference]: With dead ends: 64 [2022-04-08 07:39:27,878 INFO L226 Difference]: Without dead ends: 57 [2022-04-08 07:39:27,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-04-08 07:39:27,880 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 10 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-08 07:39:27,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 96 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-08 07:39:27,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-08 07:39:27,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-04-08 07:39:27,959 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 07:39:27,960 INFO L82 GeneralOperation]: Start isEquivalent. First operand 57 states. Second operand has 57 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 07:39:27,960 INFO L74 IsIncluded]: Start isIncluded. First operand 57 states. Second operand has 57 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 07:39:27,960 INFO L87 Difference]: Start difference. First operand 57 states. Second operand has 57 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 07:39:27,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:39:27,963 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-04-08 07:39:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-04-08 07:39:27,965 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:39:27,965 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:39:27,966 INFO L74 IsIncluded]: Start isIncluded. First operand has 57 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 57 states. [2022-04-08 07:39:27,966 INFO L87 Difference]: Start difference. First operand has 57 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 57 states. [2022-04-08 07:39:27,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 07:39:27,967 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2022-04-08 07:39:27,967 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-04-08 07:39:27,968 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 07:39:27,968 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 07:39:27,968 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 07:39:27,968 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 07:39:27,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 43 states have internal predecessors, (48), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 07:39:27,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2022-04-08 07:39:27,969 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 48 [2022-04-08 07:39:27,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 07:39:27,970 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2022-04-08 07:39:27,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 6 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-08 07:39:27,970 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 57 states and 62 transitions. [2022-04-08 07:39:37,911 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 62 edges. 58 inductive. 0 not inductive. 4 times theorem prover too weak to decide inductivity. [2022-04-08 07:39:37,911 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2022-04-08 07:39:37,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-08 07:39:37,912 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 07:39:37,912 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 07:39:37,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-08 07:39:38,112 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-08 07:39:38,113 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 07:39:38,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 07:39:38,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1256284433, now seen corresponding path program 5 times [2022-04-08 07:39:38,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 07:39:38,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [395708581] [2022-04-08 07:39:41,542 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-08 07:39:41,542 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-08 07:39:41,542 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-08 07:39:41,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1256284433, now seen corresponding path program 6 times [2022-04-08 07:39:41,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 07:39:41,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451863902] [2022-04-08 07:39:41,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 07:39:41,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 07:39:41,555 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 07:39:41,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051546660] [2022-04-08 07:39:41,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-08 07:39:41,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 07:39:41,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 07:39:41,563 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-08 07:39:41,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-08 07:39:41,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-08 07:39:41,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 07:39:41,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-08 07:39:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 07:39:41,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 07:40:16,350 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-08 07:42:00,959 INFO L272 TraceCheckUtils]: 0: Hoare triple {6881#true} call ULTIMATE.init(); {6881#true} is VALID [2022-04-08 07:42:00,959 INFO L290 TraceCheckUtils]: 1: Hoare triple {6881#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {6881#true} is VALID [2022-04-08 07:42:00,959 INFO L290 TraceCheckUtils]: 2: Hoare triple {6881#true} assume true; {6881#true} is VALID [2022-04-08 07:42:00,960 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {6881#true} {6881#true} #65#return; {6881#true} is VALID [2022-04-08 07:42:00,960 INFO L272 TraceCheckUtils]: 4: Hoare triple {6881#true} call #t~ret7 := main(); {6881#true} is VALID [2022-04-08 07:42:00,960 INFO L290 TraceCheckUtils]: 5: Hoare triple {6881#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~z~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~a~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~b~0 := #t~nondet5;havoc #t~nondet5; {6881#true} is VALID [2022-04-08 07:42:00,960 INFO L272 TraceCheckUtils]: 6: Hoare triple {6881#true} call assume_abort_if_not((if ~b~0 >= 1 then 1 else 0)); {6881#true} is VALID [2022-04-08 07:42:00,960 INFO L290 TraceCheckUtils]: 7: Hoare triple {6881#true} ~cond := #in~cond; {6907#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} is VALID [2022-04-08 07:42:00,960 INFO L290 TraceCheckUtils]: 8: Hoare triple {6907#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} assume !(0 == ~cond); {6911#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 07:42:00,961 INFO L290 TraceCheckUtils]: 9: Hoare triple {6911#(not (= |assume_abort_if_not_#in~cond| 0))} assume true; {6911#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-08 07:42:00,961 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {6911#(not (= |assume_abort_if_not_#in~cond| 0))} {6881#true} #59#return; {6918#(<= 1 main_~b~0)} is VALID [2022-04-08 07:42:00,961 INFO L290 TraceCheckUtils]: 11: Hoare triple {6918#(<= 1 main_~b~0)} ~x~0 := ~a~0;~y~0 := ~b~0;~z~0 := 0; {6922#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:42:00,962 INFO L290 TraceCheckUtils]: 12: Hoare triple {6922#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {6922#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:42:00,962 INFO L290 TraceCheckUtils]: 13: Hoare triple {6922#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} assume !!(#t~post6 < 100);havoc #t~post6; {6922#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:42:00,962 INFO L272 TraceCheckUtils]: 14: Hoare triple {6922#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {6881#true} is VALID [2022-04-08 07:42:00,962 INFO L290 TraceCheckUtils]: 15: Hoare triple {6881#true} ~cond := #in~cond; {6881#true} is VALID [2022-04-08 07:42:00,963 INFO L290 TraceCheckUtils]: 16: Hoare triple {6881#true} assume !(0 == ~cond); {6881#true} is VALID [2022-04-08 07:42:00,963 INFO L290 TraceCheckUtils]: 17: Hoare triple {6881#true} assume true; {6881#true} is VALID [2022-04-08 07:42:00,963 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {6881#true} {6922#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} #61#return; {6922#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:42:00,963 INFO L290 TraceCheckUtils]: 19: Hoare triple {6922#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} assume !!(0 != ~y~0); {6922#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:42:00,964 INFO L290 TraceCheckUtils]: 20: Hoare triple {6922#(and (= main_~z~0 0) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {6950#(and (= main_~z~0 0) (not (= (mod main_~y~0 2) 1)) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 07:42:00,965 INFO L290 TraceCheckUtils]: 21: Hoare triple {6950#(and (= main_~z~0 0) (not (= (mod main_~y~0 2) 1)) (= main_~b~0 main_~y~0) (<= 1 main_~b~0) (= main_~a~0 main_~x~0))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {6954#(and (= main_~z~0 0) (<= (div main_~b~0 2) main_~y~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:42:00,966 INFO L290 TraceCheckUtils]: 22: Hoare triple {6954#(and (= main_~z~0 0) (<= (div main_~b~0 2) main_~y~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {6954#(and (= main_~z~0 0) (<= (div main_~b~0 2) main_~y~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:42:00,966 INFO L290 TraceCheckUtils]: 23: Hoare triple {6954#(and (= main_~z~0 0) (<= (div main_~b~0 2) main_~y~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} assume !!(#t~post6 < 100);havoc #t~post6; {6954#(and (= main_~z~0 0) (<= (div main_~b~0 2) main_~y~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:42:00,966 INFO L272 TraceCheckUtils]: 24: Hoare triple {6954#(and (= main_~z~0 0) (<= (div main_~b~0 2) main_~y~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {6881#true} is VALID [2022-04-08 07:42:00,966 INFO L290 TraceCheckUtils]: 25: Hoare triple {6881#true} ~cond := #in~cond; {6881#true} is VALID [2022-04-08 07:42:00,966 INFO L290 TraceCheckUtils]: 26: Hoare triple {6881#true} assume !(0 == ~cond); {6881#true} is VALID [2022-04-08 07:42:00,966 INFO L290 TraceCheckUtils]: 27: Hoare triple {6881#true} assume true; {6881#true} is VALID [2022-04-08 07:42:00,967 INFO L284 TraceCheckUtils]: 28: Hoare quadruple {6881#true} {6954#(and (= main_~z~0 0) (<= (div main_~b~0 2) main_~y~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} #61#return; {6954#(and (= main_~z~0 0) (<= (div main_~b~0 2) main_~y~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:42:00,967 INFO L290 TraceCheckUtils]: 29: Hoare triple {6954#(and (= main_~z~0 0) (<= (div main_~b~0 2) main_~y~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} assume !!(0 != ~y~0); {6954#(and (= main_~z~0 0) (<= (div main_~b~0 2) main_~y~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:42:00,968 INFO L290 TraceCheckUtils]: 30: Hoare triple {6954#(and (= main_~z~0 0) (<= (div main_~b~0 2) main_~y~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {6982#(and (= main_~z~0 0) (not (= (mod main_~y~0 2) 1)) (<= (div main_~b~0 2) main_~y~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:42:00,971 INFO L290 TraceCheckUtils]: 31: Hoare triple {6982#(and (= main_~z~0 0) (not (= (mod main_~y~0 2) 1)) (<= (div main_~b~0 2) main_~y~0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {6986#(and (exists ((aux_div_v_main_~y~0_123_23 Int) (aux_mod_v_main_~y~0_123_23 Int)) (and (< aux_mod_v_main_~y~0_123_23 2) (<= 0 aux_mod_v_main_~y~0_123_23) (not (= aux_mod_v_main_~y~0_123_23 1)) (<= (div main_~b~0 2) (+ (* 2 aux_div_v_main_~y~0_123_23) aux_mod_v_main_~y~0_123_23)) (<= (div (+ (* 2 aux_div_v_main_~y~0_123_23) aux_mod_v_main_~y~0_123_23) 2) main_~y~0))) (= main_~z~0 0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:42:00,972 INFO L290 TraceCheckUtils]: 32: Hoare triple {6986#(and (exists ((aux_div_v_main_~y~0_123_23 Int) (aux_mod_v_main_~y~0_123_23 Int)) (and (< aux_mod_v_main_~y~0_123_23 2) (<= 0 aux_mod_v_main_~y~0_123_23) (not (= aux_mod_v_main_~y~0_123_23 1)) (<= (div main_~b~0 2) (+ (* 2 aux_div_v_main_~y~0_123_23) aux_mod_v_main_~y~0_123_23)) (<= (div (+ (* 2 aux_div_v_main_~y~0_123_23) aux_mod_v_main_~y~0_123_23) 2) main_~y~0))) (= main_~z~0 0) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {6990#(and (= main_~z~0 0) (< (div (* (- 1) (div main_~b~0 2)) (- 2)) (+ main_~y~0 1)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:42:00,973 INFO L290 TraceCheckUtils]: 33: Hoare triple {6990#(and (= main_~z~0 0) (< (div (* (- 1) (div main_~b~0 2)) (- 2)) (+ main_~y~0 1)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} assume !!(#t~post6 < 100);havoc #t~post6; {6990#(and (= main_~z~0 0) (< (div (* (- 1) (div main_~b~0 2)) (- 2)) (+ main_~y~0 1)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:42:00,973 INFO L272 TraceCheckUtils]: 34: Hoare triple {6990#(and (= main_~z~0 0) (< (div (* (- 1) (div main_~b~0 2)) (- 2)) (+ main_~y~0 1)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {6881#true} is VALID [2022-04-08 07:42:00,973 INFO L290 TraceCheckUtils]: 35: Hoare triple {6881#true} ~cond := #in~cond; {7000#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:42:00,973 INFO L290 TraceCheckUtils]: 36: Hoare triple {7000#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {7004#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:42:00,974 INFO L290 TraceCheckUtils]: 37: Hoare triple {7004#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {7004#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-08 07:42:00,975 INFO L284 TraceCheckUtils]: 38: Hoare quadruple {7004#(not (= |__VERIFIER_assert_#in~cond| 0))} {6990#(and (= main_~z~0 0) (< (div (* (- 1) (div main_~b~0 2)) (- 2)) (+ main_~y~0 1)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} #61#return; {7011#(and (= main_~z~0 0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (< (div (* (- 1) (div main_~b~0 2)) (- 2)) (+ main_~y~0 1)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:42:00,976 INFO L290 TraceCheckUtils]: 39: Hoare triple {7011#(and (= main_~z~0 0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (< (div (* (- 1) (div main_~b~0 2)) (- 2)) (+ main_~y~0 1)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} assume !!(0 != ~y~0); {7011#(and (= main_~z~0 0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (< (div (* (- 1) (div main_~b~0 2)) (- 2)) (+ main_~y~0 1)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:42:00,977 INFO L290 TraceCheckUtils]: 40: Hoare triple {7011#(and (= main_~z~0 0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (< (div (* (- 1) (div main_~b~0 2)) (- 2)) (+ main_~y~0 1)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} assume !(1 == (if ~y~0 < 0 && 0 != ~y~0 % 2 then ~y~0 % 2 - 2 else ~y~0 % 2)); {7018#(and (= main_~z~0 0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (< (div (* (- 1) (div main_~b~0 2)) (- 2)) (+ main_~y~0 1)) (not (= (mod main_~y~0 2) 1)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} is VALID [2022-04-08 07:42:00,989 INFO L290 TraceCheckUtils]: 41: Hoare triple {7018#(and (= main_~z~0 0) (= (+ main_~z~0 (* main_~y~0 main_~x~0)) (* main_~b~0 main_~a~0)) (< (div (* (- 1) (div main_~b~0 2)) (- 2)) (+ main_~y~0 1)) (not (= (mod main_~y~0 2) 1)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0))} ~x~0 := 2 * ~x~0;~y~0 := (if ~y~0 < 0 && 0 != ~y~0 % 2 then 1 + ~y~0 / 2 else ~y~0 / 2); {7022#(and (= main_~z~0 0) (exists ((aux_div_v_main_~y~0_124_23 Int) (aux_mod_v_main_~y~0_124_23 Int)) (and (<= 0 aux_mod_v_main_~y~0_124_23) (= (+ main_~z~0 (* (div main_~x~0 2) (+ (* 2 aux_div_v_main_~y~0_124_23) aux_mod_v_main_~y~0_124_23))) (* main_~b~0 main_~a~0)) (< (div (* (- 1) (div main_~b~0 2)) (- 2)) (+ (* 2 aux_div_v_main_~y~0_124_23) aux_mod_v_main_~y~0_124_23 1)) (= (div (+ (* 2 aux_div_v_main_~y~0_124_23) aux_mod_v_main_~y~0_124_23) 2) main_~y~0) (< aux_mod_v_main_~y~0_124_23 2) (not (= aux_mod_v_main_~y~0_124_23 1)))) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0) (= (mod main_~x~0 2) 0))} is VALID [2022-04-08 07:42:00,994 INFO L290 TraceCheckUtils]: 42: Hoare triple {7022#(and (= main_~z~0 0) (exists ((aux_div_v_main_~y~0_124_23 Int) (aux_mod_v_main_~y~0_124_23 Int)) (and (<= 0 aux_mod_v_main_~y~0_124_23) (= (+ main_~z~0 (* (div main_~x~0 2) (+ (* 2 aux_div_v_main_~y~0_124_23) aux_mod_v_main_~y~0_124_23))) (* main_~b~0 main_~a~0)) (< (div (* (- 1) (div main_~b~0 2)) (- 2)) (+ (* 2 aux_div_v_main_~y~0_124_23) aux_mod_v_main_~y~0_124_23 1)) (= (div (+ (* 2 aux_div_v_main_~y~0_124_23) aux_mod_v_main_~y~0_124_23) 2) main_~y~0) (< aux_mod_v_main_~y~0_124_23 2) (not (= aux_mod_v_main_~y~0_124_23 1)))) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0) (= (mod main_~x~0 2) 0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {7026#(and (= (* main_~b~0 main_~a~0) (+ main_~z~0 (* 2 (* (div main_~x~0 2) main_~y~0)))) (= main_~z~0 0) (< (div (* (div (* (- 1) (div main_~b~0 2)) (- 2)) (- 1)) (- 2)) (+ main_~y~0 1)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0) (= (mod main_~x~0 2) 0))} is VALID [2022-04-08 07:42:00,995 INFO L290 TraceCheckUtils]: 43: Hoare triple {7026#(and (= (* main_~b~0 main_~a~0) (+ main_~z~0 (* 2 (* (div main_~x~0 2) main_~y~0)))) (= main_~z~0 0) (< (div (* (div (* (- 1) (div main_~b~0 2)) (- 2)) (- 1)) (- 2)) (+ main_~y~0 1)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0) (= (mod main_~x~0 2) 0))} assume !!(#t~post6 < 100);havoc #t~post6; {7026#(and (= (* main_~b~0 main_~a~0) (+ main_~z~0 (* 2 (* (div main_~x~0 2) main_~y~0)))) (= main_~z~0 0) (< (div (* (div (* (- 1) (div main_~b~0 2)) (- 2)) (- 1)) (- 2)) (+ main_~y~0 1)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0) (= (mod main_~x~0 2) 0))} is VALID [2022-04-08 07:42:01,059 INFO L272 TraceCheckUtils]: 44: Hoare triple {7026#(and (= (* main_~b~0 main_~a~0) (+ main_~z~0 (* 2 (* (div main_~x~0 2) main_~y~0)))) (= main_~z~0 0) (< (div (* (div (* (- 1) (div main_~b~0 2)) (- 2)) (- 1)) (- 2)) (+ main_~y~0 1)) (not (= (mod main_~b~0 2) 1)) (<= 1 main_~b~0) (= (mod main_~x~0 2) 0))} call __VERIFIER_assert((if ~z~0 + ~x~0 * ~y~0 == ~a~0 * ~b~0 then 1 else 0)); {7033#(exists ((v_main_~a~0_BEFORE_CALL_48 Int) (aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59 Int) (aux_div_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70 Int) (aux_div_v_main_~x~0_BEFORE_CALL_46_34 Int) (v_main_~y~0_BEFORE_CALL_49 Int) (aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45 Int) (aux_mod_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70 Int) (aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45 Int)) (and (<= (+ (* aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59 2) (* aux_mod_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70 4) 1) (+ (* 2 aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45) (* aux_div_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70 8) aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45)) (<= 0 (+ (* 2 aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45) aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45)) (<= 0 aux_mod_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70) (not (= aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45 1)) (= (+ (* (* v_main_~a~0_BEFORE_CALL_48 aux_div_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70) 8) (* v_main_~a~0_BEFORE_CALL_48 aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45) (* 2 (* v_main_~a~0_BEFORE_CALL_48 aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45))) (+ (* 2 (* (div (* aux_div_v_main_~x~0_BEFORE_CALL_46_34 2) 2) v_main_~y~0_BEFORE_CALL_49)) (* (* v_main_~a~0_BEFORE_CALL_48 aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59) 2) (* (* v_main_~a~0_BEFORE_CALL_48 aux_mod_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70) 4))) (< aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59 2) (<= 1 |__VERIFIER_assert_#in~cond|) (< aux_mod_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70 2) (< (+ (* 2 aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45) aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45) 2) (<= 0 aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45) (<= 0 aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59) (< aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45 2) (< aux_div_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70 (+ v_main_~y~0_BEFORE_CALL_49 1))))} is VALID [2022-04-08 07:42:01,060 INFO L290 TraceCheckUtils]: 45: Hoare triple {7033#(exists ((v_main_~a~0_BEFORE_CALL_48 Int) (aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59 Int) (aux_div_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70 Int) (aux_div_v_main_~x~0_BEFORE_CALL_46_34 Int) (v_main_~y~0_BEFORE_CALL_49 Int) (aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45 Int) (aux_mod_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70 Int) (aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45 Int)) (and (<= (+ (* aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59 2) (* aux_mod_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70 4) 1) (+ (* 2 aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45) (* aux_div_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70 8) aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45)) (<= 0 (+ (* 2 aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45) aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45)) (<= 0 aux_mod_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70) (not (= aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45 1)) (= (+ (* (* v_main_~a~0_BEFORE_CALL_48 aux_div_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70) 8) (* v_main_~a~0_BEFORE_CALL_48 aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45) (* 2 (* v_main_~a~0_BEFORE_CALL_48 aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45))) (+ (* 2 (* (div (* aux_div_v_main_~x~0_BEFORE_CALL_46_34 2) 2) v_main_~y~0_BEFORE_CALL_49)) (* (* v_main_~a~0_BEFORE_CALL_48 aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59) 2) (* (* v_main_~a~0_BEFORE_CALL_48 aux_mod_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70) 4))) (< aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59 2) (<= 1 |__VERIFIER_assert_#in~cond|) (< aux_mod_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70 2) (< (+ (* 2 aux_div_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45) aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45) 2) (<= 0 aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45) (<= 0 aux_mod_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59) (< aux_mod_aux_mod_v_main_~b~0_BEFORE_CALL_57_34_45 2) (< aux_div_aux_div_aux_div_v_main_~b~0_BEFORE_CALL_57_34_59_70 (+ v_main_~y~0_BEFORE_CALL_49 1))))} ~cond := #in~cond; {7037#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 07:42:01,061 INFO L290 TraceCheckUtils]: 46: Hoare triple {7037#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {6882#false} is VALID [2022-04-08 07:42:01,061 INFO L290 TraceCheckUtils]: 47: Hoare triple {6882#false} assume !false; {6882#false} is VALID [2022-04-08 07:42:01,061 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-08 07:42:01,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-08 07:42:29,922 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful