/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-e106359-m [2022-04-15 16:07:26,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-15 16:07:26,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-15 16:07:26,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-15 16:07:26,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-15 16:07:26,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-15 16:07:26,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-15 16:07:26,213 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-15 16:07:26,219 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-15 16:07:26,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-15 16:07:26,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-15 16:07:26,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-15 16:07:26,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-15 16:07:26,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-15 16:07:26,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-15 16:07:26,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-15 16:07:26,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-15 16:07:26,220 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-15 16:07:26,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-15 16:07:26,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-15 16:07:26,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-15 16:07:26,221 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-15 16:07:26,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-15 16:07:26,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 16:07:26,221 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-15 16:07:26,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-15 16:07:26,222 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-15 16:07:26,222 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-15 16:07:26,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-15 16:07:26,222 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-15 16:07:26,222 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-15 16:07:26,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-15 16:07:26,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-15 16:07:26,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-15 16:07:26,428 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-15 16:07:26,430 INFO L275 PluginConnector]: CDTParser initialized [2022-04-15 16:07:26,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound2.c [2022-04-15 16:07:26,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5310e8b24/692e439554594a92b76360030547f2c2/FLAGf5f331ae5 [2022-04-15 16:07:26,806 INFO L306 CDTParser]: Found 1 translation units. [2022-04-15 16:07:26,807 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound2.c [2022-04-15 16:07:26,816 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5310e8b24/692e439554594a92b76360030547f2c2/FLAGf5f331ae5 [2022-04-15 16:07:26,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5310e8b24/692e439554594a92b76360030547f2c2 [2022-04-15 16:07:26,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-15 16:07:26,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-15 16:07:26,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-15 16:07:26,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-15 16:07:26,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-15 16:07:26,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 04:07:26" (1/1) ... [2022-04-15 16:07:26,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4eb3b4a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:07:26, skipping insertion in model container [2022-04-15 16:07:26,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 04:07:26" (1/1) ... [2022-04-15 16:07:26,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-15 16:07:26,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-15 16:07:26,966 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/lcm2_unwindbound2.c[537,550] [2022-04-15 16:07:26,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 16:07:26,996 INFO L203 MainTranslator]: Completed pre-run [2022-04-15 16:07:27,006 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/lcm2_unwindbound2.c[537,550] [2022-04-15 16:07:27,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 16:07:27,030 INFO L208 MainTranslator]: Completed translation [2022-04-15 16:07:27,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:07:27 WrapperNode [2022-04-15 16:07:27,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-15 16:07:27,032 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-15 16:07:27,032 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-15 16:07:27,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-15 16:07:27,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:07:27" (1/1) ... [2022-04-15 16:07:27,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:07:27" (1/1) ... [2022-04-15 16:07:27,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:07:27" (1/1) ... [2022-04-15 16:07:27,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:07:27" (1/1) ... [2022-04-15 16:07:27,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:07:27" (1/1) ... [2022-04-15 16:07:27,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:07:27" (1/1) ... [2022-04-15 16:07:27,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:07:27" (1/1) ... [2022-04-15 16:07:27,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-15 16:07:27,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-15 16:07:27,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-15 16:07:27,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-15 16:07:27,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:07:27" (1/1) ... [2022-04-15 16:07:27,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 16:07:27,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 16:07:27,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-15 16:07:27,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-15 16:07:27,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-15 16:07:27,115 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-15 16:07:27,115 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-15 16:07:27,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-15 16:07:27,115 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-15 16:07:27,116 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-15 16:07:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-15 16:07:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-15 16:07:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-15 16:07:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-15 16:07:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-15 16:07:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-15 16:07:27,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-15 16:07:27,117 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-15 16:07:27,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-15 16:07:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-15 16:07:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-15 16:07:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-15 16:07:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-15 16:07:27,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-15 16:07:27,164 INFO L234 CfgBuilder]: Building ICFG [2022-04-15 16:07:27,165 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-15 16:07:27,271 INFO L275 CfgBuilder]: Performing block encoding [2022-04-15 16:07:27,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-15 16:07:27,276 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-15 16:07:27,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:07:27 BoogieIcfgContainer [2022-04-15 16:07:27,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-15 16:07:27,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-15 16:07:27,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-15 16:07:27,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-15 16:07:27,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 04:07:26" (1/3) ... [2022-04-15 16:07:27,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223c965b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 04:07:27, skipping insertion in model container [2022-04-15 16:07:27,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:07:27" (2/3) ... [2022-04-15 16:07:27,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@223c965b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 04:07:27, skipping insertion in model container [2022-04-15 16:07:27,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:07:27" (3/3) ... [2022-04-15 16:07:27,282 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound2.c [2022-04-15 16:07:27,289 INFO L202 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-15 16:07:27,289 INFO L161 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-15 16:07:27,336 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-15 16:07:27,342 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-15 16:07:27,342 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-15 16:07:27,370 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-15 16:07:27,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-15 16:07:27,375 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 16:07:27,375 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 16:07:27,376 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 16:07:27,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 16:07:27,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2009995470, now seen corresponding path program 1 times [2022-04-15 16:07:27,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 16:07:27,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1746186278] [2022-04-15 16:07:27,399 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 16:07:27,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2009995470, now seen corresponding path program 2 times [2022-04-15 16:07:27,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 16:07:27,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222141108] [2022-04-15 16:07:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 16:07:27,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 16:07:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:07:27,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-15 16:07:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:07:27,589 INFO L290 TraceCheckUtils]: 0: Hoare triple {56#(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(7, 2);call write~init~int(108, 2, 0, 1);call write~init~int(99, 2, 1, 1);call write~init~int(109, 2, 2, 1);call write~init~int(50, 2, 3, 1);call write~init~int(46, 2, 4, 1);call write~init~int(99, 2, 5, 1);call write~init~int(0, 2, 6, 1);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {35#true} is VALID [2022-04-15 16:07:27,590 INFO L290 TraceCheckUtils]: 1: Hoare triple {35#true} assume true; {35#true} is VALID [2022-04-15 16:07:27,590 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {35#true} {35#true} #73#return; {35#true} is VALID [2022-04-15 16:07:27,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-15 16:07:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:07:27,603 INFO L290 TraceCheckUtils]: 0: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-15 16:07:27,603 INFO L290 TraceCheckUtils]: 1: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-15 16:07:27,604 INFO L290 TraceCheckUtils]: 2: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-15 16:07:27,604 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {36#false} {35#true} #61#return; {36#false} is VALID [2022-04-15 16:07:27,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-15 16:07:27,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:07:27,623 INFO L290 TraceCheckUtils]: 0: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-15 16:07:27,624 INFO L290 TraceCheckUtils]: 1: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-15 16:07:27,624 INFO L290 TraceCheckUtils]: 2: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-15 16:07:27,624 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {36#false} {36#false} #63#return; {36#false} is VALID [2022-04-15 16:07:27,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-15 16:07:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:07:27,638 INFO L290 TraceCheckUtils]: 0: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-15 16:07:27,638 INFO L290 TraceCheckUtils]: 1: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-15 16:07:27,638 INFO L290 TraceCheckUtils]: 2: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-15 16:07:27,639 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {36#false} {36#false} #65#return; {36#false} is VALID [2022-04-15 16:07:27,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-15 16:07:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:07:27,644 INFO L290 TraceCheckUtils]: 0: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-15 16:07:27,644 INFO L290 TraceCheckUtils]: 1: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-15 16:07:27,644 INFO L290 TraceCheckUtils]: 2: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-15 16:07:27,645 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {36#false} {36#false} #67#return; {36#false} is VALID [2022-04-15 16:07:27,646 INFO L272 TraceCheckUtils]: 0: Hoare triple {35#true} call ULTIMATE.init(); {56#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-15 16:07:27,646 INFO L290 TraceCheckUtils]: 1: Hoare triple {56#(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(7, 2);call write~init~int(108, 2, 0, 1);call write~init~int(99, 2, 1, 1);call write~init~int(109, 2, 2, 1);call write~init~int(50, 2, 3, 1);call write~init~int(46, 2, 4, 1);call write~init~int(99, 2, 5, 1);call write~init~int(0, 2, 6, 1);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {35#true} is VALID [2022-04-15 16:07:27,646 INFO L290 TraceCheckUtils]: 2: Hoare triple {35#true} assume true; {35#true} is VALID [2022-04-15 16:07:27,646 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {35#true} {35#true} #73#return; {35#true} is VALID [2022-04-15 16:07:27,646 INFO L272 TraceCheckUtils]: 4: Hoare triple {35#true} call #t~ret7 := main(); {35#true} is VALID [2022-04-15 16:07:27,646 INFO L290 TraceCheckUtils]: 5: Hoare triple {35#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~u~0;havoc ~v~0;~a~0 := #t~nondet4;havoc #t~nondet4;~b~0 := #t~nondet5;havoc #t~nondet5; {35#true} is VALID [2022-04-15 16:07:27,647 INFO L272 TraceCheckUtils]: 6: Hoare triple {35#true} call assume_abort_if_not((if ~a~0 % 4294967296 >= 1 then 1 else 0)); {35#true} is VALID [2022-04-15 16:07:27,647 INFO L290 TraceCheckUtils]: 7: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-15 16:07:27,647 INFO L290 TraceCheckUtils]: 8: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-15 16:07:27,647 INFO L290 TraceCheckUtils]: 9: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-15 16:07:27,647 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {36#false} {35#true} #61#return; {36#false} is VALID [2022-04-15 16:07:27,647 INFO L272 TraceCheckUtils]: 11: Hoare triple {36#false} call assume_abort_if_not((if ~b~0 % 4294967296 >= 1 then 1 else 0)); {35#true} is VALID [2022-04-15 16:07:27,648 INFO L290 TraceCheckUtils]: 12: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-15 16:07:27,648 INFO L290 TraceCheckUtils]: 13: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-15 16:07:27,648 INFO L290 TraceCheckUtils]: 14: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-15 16:07:27,648 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {36#false} {36#false} #63#return; {36#false} is VALID [2022-04-15 16:07:27,648 INFO L272 TraceCheckUtils]: 16: Hoare triple {36#false} call assume_abort_if_not((if ~a~0 % 4294967296 <= 65535 then 1 else 0)); {35#true} is VALID [2022-04-15 16:07:27,649 INFO L290 TraceCheckUtils]: 17: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-15 16:07:27,649 INFO L290 TraceCheckUtils]: 18: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-15 16:07:27,649 INFO L290 TraceCheckUtils]: 19: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-15 16:07:27,649 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {36#false} {36#false} #65#return; {36#false} is VALID [2022-04-15 16:07:27,649 INFO L272 TraceCheckUtils]: 21: Hoare triple {36#false} call assume_abort_if_not((if ~b~0 % 4294967296 <= 65535 then 1 else 0)); {35#true} is VALID [2022-04-15 16:07:27,650 INFO L290 TraceCheckUtils]: 22: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-15 16:07:27,651 INFO L290 TraceCheckUtils]: 23: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-15 16:07:27,651 INFO L290 TraceCheckUtils]: 24: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-15 16:07:27,651 INFO L284 TraceCheckUtils]: 25: Hoare quadruple {36#false} {36#false} #67#return; {36#false} is VALID [2022-04-15 16:07:27,651 INFO L290 TraceCheckUtils]: 26: Hoare triple {36#false} ~x~0 := ~a~0;~y~0 := ~b~0;~u~0 := ~b~0;~v~0 := ~a~0; {36#false} is VALID [2022-04-15 16:07:27,652 INFO L290 TraceCheckUtils]: 27: Hoare triple {36#false} assume !true; {36#false} is VALID [2022-04-15 16:07:27,652 INFO L272 TraceCheckUtils]: 28: Hoare triple {36#false} call __VERIFIER_assert((if (~x~0 * ~u~0 + ~y~0 * ~v~0) % 4294967296 == 2 * ~a~0 * ~b~0 % 4294967296 then 1 else 0)); {36#false} is VALID [2022-04-15 16:07:27,652 INFO L290 TraceCheckUtils]: 29: Hoare triple {36#false} ~cond := #in~cond; {36#false} is VALID [2022-04-15 16:07:27,652 INFO L290 TraceCheckUtils]: 30: Hoare triple {36#false} assume 0 == ~cond; {36#false} is VALID [2022-04-15 16:07:27,652 INFO L290 TraceCheckUtils]: 31: Hoare triple {36#false} assume !false; {36#false} is VALID [2022-04-15 16:07:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-15 16:07:27,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 16:07:27,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222141108] [2022-04-15 16:07:27,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222141108] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:07:27,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:07:27,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-15 16:07:27,656 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 16:07:27,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1746186278] [2022-04-15 16:07:27,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1746186278] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:07:27,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:07:27,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-15 16:07:27,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852645627] [2022-04-15 16:07:27,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 16:07:27,660 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-04-15 16:07:27,661 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 16:07:27,663 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-15 16:07:27,687 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 23 edges. 23 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:07:27,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-15 16:07:27,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 16:07:27,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-15 16:07:27,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-15 16:07:27,708 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-15 16:07:27,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:07:27,861 INFO L93 Difference]: Finished difference Result 58 states and 82 transitions. [2022-04-15 16:07:27,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-15 16:07:27,863 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-04-15 16:07:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 16:07:27,864 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-15 16:07:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2022-04-15 16:07:27,869 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-15 16:07:27,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2022-04-15 16:07:27,884 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 82 transitions. [2022-04-15 16:07:27,986 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 82 edges. 82 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:07:27,994 INFO L225 Difference]: With dead ends: 58 [2022-04-15 16:07:27,994 INFO L226 Difference]: Without dead ends: 28 [2022-04-15 16:07:27,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-15 16:07:28,000 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 16:07:28,002 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 37 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 16:07:28,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-15 16:07:28,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-04-15 16:07:28,037 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 16:07:28,037 INFO L82 GeneralOperation]: Start isEquivalent. First operand 28 states. Second operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-15 16:07:28,038 INFO L74 IsIncluded]: Start isIncluded. First operand 28 states. Second operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-15 16:07:28,039 INFO L87 Difference]: Start difference. First operand 28 states. Second operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-15 16:07:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:07:28,044 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-04-15 16:07:28,044 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-04-15 16:07:28,061 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:07:28,061 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:07:28,062 INFO L74 IsIncluded]: Start isIncluded. First operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 28 states. [2022-04-15 16:07:28,063 INFO L87 Difference]: Start difference. First operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 28 states. [2022-04-15 16:07:28,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:07:28,066 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-04-15 16:07:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-04-15 16:07:28,067 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:07:28,067 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:07:28,067 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 16:07:28,067 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 16:07:28,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-15 16:07:28,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-04-15 16:07:28,071 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 32 [2022-04-15 16:07:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 16:07:28,072 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-04-15 16:07:28,072 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-15 16:07:28,073 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 27 states and 33 transitions. [2022-04-15 16:07:28,116 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 33 edges. 33 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:07:28,116 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-04-15 16:07:28,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-15 16:07:28,117 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 16:07:28,118 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 16:07:28,118 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-15 16:07:28,119 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 16:07:28,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 16:07:28,120 INFO L85 PathProgramCache]: Analyzing trace with hash -756409738, now seen corresponding path program 1 times [2022-04-15 16:07:28,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 16:07:28,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [754417443] [2022-04-15 16:07:28,121 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 16:07:28,122 INFO L85 PathProgramCache]: Analyzing trace with hash -756409738, now seen corresponding path program 2 times [2022-04-15 16:07:28,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 16:07:28,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671911534] [2022-04-15 16:07:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 16:07:28,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 16:07:28,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 16:07:28,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [756683235] [2022-04-15 16:07:28,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 16:07:28,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 16:07:28,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 16:07:28,161 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 16:07:28,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-15 16:07:28,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 16:07:28,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 16:07:28,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-15 16:07:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:07:28,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 16:07:28,414 INFO L272 TraceCheckUtils]: 0: Hoare triple {285#true} call ULTIMATE.init(); {285#true} is VALID [2022-04-15 16:07:28,415 INFO L290 TraceCheckUtils]: 1: Hoare triple {285#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(7, 2);call write~init~int(108, 2, 0, 1);call write~init~int(99, 2, 1, 1);call write~init~int(109, 2, 2, 1);call write~init~int(50, 2, 3, 1);call write~init~int(46, 2, 4, 1);call write~init~int(99, 2, 5, 1);call write~init~int(0, 2, 6, 1);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,416 INFO L290 TraceCheckUtils]: 2: Hoare triple {293#(<= ~counter~0 0)} assume true; {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,416 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {293#(<= ~counter~0 0)} {285#true} #73#return; {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,418 INFO L272 TraceCheckUtils]: 4: Hoare triple {293#(<= ~counter~0 0)} call #t~ret7 := main(); {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,418 INFO L290 TraceCheckUtils]: 5: Hoare triple {293#(<= ~counter~0 0)} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~u~0;havoc ~v~0;~a~0 := #t~nondet4;havoc #t~nondet4;~b~0 := #t~nondet5;havoc #t~nondet5; {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,419 INFO L272 TraceCheckUtils]: 6: Hoare triple {293#(<= ~counter~0 0)} call assume_abort_if_not((if ~a~0 % 4294967296 >= 1 then 1 else 0)); {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,419 INFO L290 TraceCheckUtils]: 7: Hoare triple {293#(<= ~counter~0 0)} ~cond := #in~cond; {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,420 INFO L290 TraceCheckUtils]: 8: Hoare triple {293#(<= ~counter~0 0)} assume !(0 == ~cond); {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,420 INFO L290 TraceCheckUtils]: 9: Hoare triple {293#(<= ~counter~0 0)} assume true; {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,421 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {293#(<= ~counter~0 0)} {293#(<= ~counter~0 0)} #61#return; {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,421 INFO L272 TraceCheckUtils]: 11: Hoare triple {293#(<= ~counter~0 0)} call assume_abort_if_not((if ~b~0 % 4294967296 >= 1 then 1 else 0)); {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,422 INFO L290 TraceCheckUtils]: 12: Hoare triple {293#(<= ~counter~0 0)} ~cond := #in~cond; {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,422 INFO L290 TraceCheckUtils]: 13: Hoare triple {293#(<= ~counter~0 0)} assume !(0 == ~cond); {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,423 INFO L290 TraceCheckUtils]: 14: Hoare triple {293#(<= ~counter~0 0)} assume true; {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,423 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {293#(<= ~counter~0 0)} {293#(<= ~counter~0 0)} #63#return; {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,424 INFO L272 TraceCheckUtils]: 16: Hoare triple {293#(<= ~counter~0 0)} call assume_abort_if_not((if ~a~0 % 4294967296 <= 65535 then 1 else 0)); {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,424 INFO L290 TraceCheckUtils]: 17: Hoare triple {293#(<= ~counter~0 0)} ~cond := #in~cond; {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,424 INFO L290 TraceCheckUtils]: 18: Hoare triple {293#(<= ~counter~0 0)} assume !(0 == ~cond); {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,425 INFO L290 TraceCheckUtils]: 19: Hoare triple {293#(<= ~counter~0 0)} assume true; {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,426 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {293#(<= ~counter~0 0)} {293#(<= ~counter~0 0)} #65#return; {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,426 INFO L272 TraceCheckUtils]: 21: Hoare triple {293#(<= ~counter~0 0)} call assume_abort_if_not((if ~b~0 % 4294967296 <= 65535 then 1 else 0)); {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,427 INFO L290 TraceCheckUtils]: 22: Hoare triple {293#(<= ~counter~0 0)} ~cond := #in~cond; {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,429 INFO L290 TraceCheckUtils]: 23: Hoare triple {293#(<= ~counter~0 0)} assume !(0 == ~cond); {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,430 INFO L290 TraceCheckUtils]: 24: Hoare triple {293#(<= ~counter~0 0)} assume true; {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,430 INFO L284 TraceCheckUtils]: 25: Hoare quadruple {293#(<= ~counter~0 0)} {293#(<= ~counter~0 0)} #67#return; {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,431 INFO L290 TraceCheckUtils]: 26: Hoare triple {293#(<= ~counter~0 0)} ~x~0 := ~a~0;~y~0 := ~b~0;~u~0 := ~b~0;~v~0 := ~a~0; {293#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:28,431 INFO L290 TraceCheckUtils]: 27: Hoare triple {293#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {372#(<= |main_#t~post6| 0)} is VALID [2022-04-15 16:07:28,432 INFO L290 TraceCheckUtils]: 28: Hoare triple {372#(<= |main_#t~post6| 0)} assume !(#t~post6 < 2);havoc #t~post6; {286#false} is VALID [2022-04-15 16:07:28,432 INFO L272 TraceCheckUtils]: 29: Hoare triple {286#false} call __VERIFIER_assert((if (~x~0 * ~u~0 + ~y~0 * ~v~0) % 4294967296 == 2 * ~a~0 * ~b~0 % 4294967296 then 1 else 0)); {286#false} is VALID [2022-04-15 16:07:28,433 INFO L290 TraceCheckUtils]: 30: Hoare triple {286#false} ~cond := #in~cond; {286#false} is VALID [2022-04-15 16:07:28,434 INFO L290 TraceCheckUtils]: 31: Hoare triple {286#false} assume 0 == ~cond; {286#false} is VALID [2022-04-15 16:07:28,434 INFO L290 TraceCheckUtils]: 32: Hoare triple {286#false} assume !false; {286#false} is VALID [2022-04-15 16:07:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-15 16:07:28,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 16:07:28,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 16:07:28,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671911534] [2022-04-15 16:07:28,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 16:07:28,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756683235] [2022-04-15 16:07:28,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756683235] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:07:28,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:07:28,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-15 16:07:28,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 16:07:28,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [754417443] [2022-04-15 16:07:28,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [754417443] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:07:28,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:07:28,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-15 16:07:28,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679182690] [2022-04-15 16:07:28,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 16:07:28,438 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-15 16:07:28,439 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 16:07:28,439 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-15 16:07:28,459 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:07:28,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-15 16:07:28,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 16:07:28,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-15 16:07:28,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-15 16:07:28,460 INFO L87 Difference]: Start difference. First operand 27 states and 33 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-15 16:07:28,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:07:28,534 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2022-04-15 16:07:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-15 16:07:28,535 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-15 16:07:28,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 16:07:28,535 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-15 16:07:28,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2022-04-15 16:07:28,537 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-15 16:07:28,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2022-04-15 16:07:28,538 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 42 transitions. [2022-04-15 16:07:28,572 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 42 edges. 42 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:07:28,573 INFO L225 Difference]: With dead ends: 36 [2022-04-15 16:07:28,573 INFO L226 Difference]: Without dead ends: 29 [2022-04-15 16:07:28,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-15 16:07:28,575 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 16:07:28,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 16:07:28,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-15 16:07:28,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-15 16:07:28,585 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 16:07:28,585 INFO L82 GeneralOperation]: Start isEquivalent. First operand 29 states. Second operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-15 16:07:28,586 INFO L74 IsIncluded]: Start isIncluded. First operand 29 states. Second operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-15 16:07:28,586 INFO L87 Difference]: Start difference. First operand 29 states. Second operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-15 16:07:28,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:07:28,588 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-04-15 16:07:28,588 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-04-15 16:07:28,588 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:07:28,588 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:07:28,589 INFO L74 IsIncluded]: Start isIncluded. First operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 29 states. [2022-04-15 16:07:28,589 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 29 states. [2022-04-15 16:07:28,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:07:28,590 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-04-15 16:07:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-04-15 16:07:28,591 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:07:28,591 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:07:28,591 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 16:07:28,591 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 16:07:28,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-15 16:07:28,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-04-15 16:07:28,592 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 33 [2022-04-15 16:07:28,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 16:07:28,593 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-04-15 16:07:28,593 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-15 16:07:28,593 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 29 states and 35 transitions. [2022-04-15 16:07:28,628 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 35 edges. 35 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:07:28,628 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-04-15 16:07:28,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-15 16:07:28,630 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 16:07:28,631 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 16:07:28,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-15 16:07:28,843 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 [2022-04-15 16:07:28,844 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 16:07:28,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 16:07:28,844 INFO L85 PathProgramCache]: Analyzing trace with hash -754622278, now seen corresponding path program 1 times [2022-04-15 16:07:28,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 16:07:28,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [22475289] [2022-04-15 16:07:28,845 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 16:07:28,845 INFO L85 PathProgramCache]: Analyzing trace with hash -754622278, now seen corresponding path program 2 times [2022-04-15 16:07:28,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 16:07:28,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636397718] [2022-04-15 16:07:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 16:07:28,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 16:07:28,859 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 16:07:28,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048680934] [2022-04-15 16:07:28,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 16:07:28,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 16:07:28,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 16:07:28,861 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 16:07:28,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-15 16:07:28,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 16:07:28,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 16:07:28,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-15 16:07:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:07:28,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 16:07:29,218 INFO L272 TraceCheckUtils]: 0: Hoare triple {575#true} call ULTIMATE.init(); {575#true} is VALID [2022-04-15 16:07:29,218 INFO L290 TraceCheckUtils]: 1: Hoare triple {575#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(7, 2);call write~init~int(108, 2, 0, 1);call write~init~int(99, 2, 1, 1);call write~init~int(109, 2, 2, 1);call write~init~int(50, 2, 3, 1);call write~init~int(46, 2, 4, 1);call write~init~int(99, 2, 5, 1);call write~init~int(0, 2, 6, 1);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {575#true} is VALID [2022-04-15 16:07:29,218 INFO L290 TraceCheckUtils]: 2: Hoare triple {575#true} assume true; {575#true} is VALID [2022-04-15 16:07:29,219 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {575#true} {575#true} #73#return; {575#true} is VALID [2022-04-15 16:07:29,219 INFO L272 TraceCheckUtils]: 4: Hoare triple {575#true} call #t~ret7 := main(); {575#true} is VALID [2022-04-15 16:07:29,219 INFO L290 TraceCheckUtils]: 5: Hoare triple {575#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~u~0;havoc ~v~0;~a~0 := #t~nondet4;havoc #t~nondet4;~b~0 := #t~nondet5;havoc #t~nondet5; {575#true} is VALID [2022-04-15 16:07:29,219 INFO L272 TraceCheckUtils]: 6: Hoare triple {575#true} call assume_abort_if_not((if ~a~0 % 4294967296 >= 1 then 1 else 0)); {575#true} is VALID [2022-04-15 16:07:29,219 INFO L290 TraceCheckUtils]: 7: Hoare triple {575#true} ~cond := #in~cond; {575#true} is VALID [2022-04-15 16:07:29,219 INFO L290 TraceCheckUtils]: 8: Hoare triple {575#true} assume !(0 == ~cond); {575#true} is VALID [2022-04-15 16:07:29,219 INFO L290 TraceCheckUtils]: 9: Hoare triple {575#true} assume true; {575#true} is VALID [2022-04-15 16:07:29,219 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {575#true} {575#true} #61#return; {575#true} is VALID [2022-04-15 16:07:29,220 INFO L272 TraceCheckUtils]: 11: Hoare triple {575#true} call assume_abort_if_not((if ~b~0 % 4294967296 >= 1 then 1 else 0)); {575#true} is VALID [2022-04-15 16:07:29,220 INFO L290 TraceCheckUtils]: 12: Hoare triple {575#true} ~cond := #in~cond; {575#true} is VALID [2022-04-15 16:07:29,220 INFO L290 TraceCheckUtils]: 13: Hoare triple {575#true} assume !(0 == ~cond); {575#true} is VALID [2022-04-15 16:07:29,220 INFO L290 TraceCheckUtils]: 14: Hoare triple {575#true} assume true; {575#true} is VALID [2022-04-15 16:07:29,220 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {575#true} {575#true} #63#return; {575#true} is VALID [2022-04-15 16:07:29,220 INFO L272 TraceCheckUtils]: 16: Hoare triple {575#true} call assume_abort_if_not((if ~a~0 % 4294967296 <= 65535 then 1 else 0)); {575#true} is VALID [2022-04-15 16:07:29,220 INFO L290 TraceCheckUtils]: 17: Hoare triple {575#true} ~cond := #in~cond; {575#true} is VALID [2022-04-15 16:07:29,220 INFO L290 TraceCheckUtils]: 18: Hoare triple {575#true} assume !(0 == ~cond); {575#true} is VALID [2022-04-15 16:07:29,220 INFO L290 TraceCheckUtils]: 19: Hoare triple {575#true} assume true; {575#true} is VALID [2022-04-15 16:07:29,221 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {575#true} {575#true} #65#return; {575#true} is VALID [2022-04-15 16:07:29,221 INFO L272 TraceCheckUtils]: 21: Hoare triple {575#true} call assume_abort_if_not((if ~b~0 % 4294967296 <= 65535 then 1 else 0)); {575#true} is VALID [2022-04-15 16:07:29,221 INFO L290 TraceCheckUtils]: 22: Hoare triple {575#true} ~cond := #in~cond; {575#true} is VALID [2022-04-15 16:07:29,221 INFO L290 TraceCheckUtils]: 23: Hoare triple {575#true} assume !(0 == ~cond); {575#true} is VALID [2022-04-15 16:07:29,221 INFO L290 TraceCheckUtils]: 24: Hoare triple {575#true} assume true; {575#true} is VALID [2022-04-15 16:07:29,221 INFO L284 TraceCheckUtils]: 25: Hoare quadruple {575#true} {575#true} #67#return; {575#true} is VALID [2022-04-15 16:07:29,222 INFO L290 TraceCheckUtils]: 26: Hoare triple {575#true} ~x~0 := ~a~0;~y~0 := ~b~0;~u~0 := ~b~0;~v~0 := ~a~0; {658#(and (= main_~a~0 main_~v~0) (= main_~b~0 main_~y~0) (= main_~b~0 main_~u~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-15 16:07:29,222 INFO L290 TraceCheckUtils]: 27: Hoare triple {658#(and (= main_~a~0 main_~v~0) (= main_~b~0 main_~y~0) (= main_~b~0 main_~u~0) (= main_~a~0 main_~x~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {658#(and (= main_~a~0 main_~v~0) (= main_~b~0 main_~y~0) (= main_~b~0 main_~u~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-15 16:07:29,223 INFO L290 TraceCheckUtils]: 28: Hoare triple {658#(and (= main_~a~0 main_~v~0) (= main_~b~0 main_~y~0) (= main_~b~0 main_~u~0) (= main_~a~0 main_~x~0))} assume !!(#t~post6 < 2);havoc #t~post6; {658#(and (= main_~a~0 main_~v~0) (= main_~b~0 main_~y~0) (= main_~b~0 main_~u~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-15 16:07:29,223 INFO L272 TraceCheckUtils]: 29: Hoare triple {658#(and (= main_~a~0 main_~v~0) (= main_~b~0 main_~y~0) (= main_~b~0 main_~u~0) (= main_~a~0 main_~x~0))} call __VERIFIER_assert((if (~x~0 * ~u~0 + ~y~0 * ~v~0) % 4294967296 == 2 * ~a~0 * ~b~0 % 4294967296 then 1 else 0)); {668#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 16:07:29,224 INFO L290 TraceCheckUtils]: 30: Hoare triple {668#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {672#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 16:07:29,225 INFO L290 TraceCheckUtils]: 31: Hoare triple {672#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {576#false} is VALID [2022-04-15 16:07:29,225 INFO L290 TraceCheckUtils]: 32: Hoare triple {576#false} assume !false; {576#false} is VALID [2022-04-15 16:07:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-15 16:07:29,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 16:07:29,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 16:07:29,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636397718] [2022-04-15 16:07:29,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 16:07:29,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048680934] [2022-04-15 16:07:29,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048680934] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:07:29,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:07:29,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 16:07:29,226 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 16:07:29,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [22475289] [2022-04-15 16:07:29,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [22475289] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:07:29,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:07:29,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 16:07:29,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344353812] [2022-04-15 16:07:29,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 16:07:29,227 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-04-15 16:07:29,227 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 16:07:29,227 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-15 16:07:29,245 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:07:29,246 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-15 16:07:29,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 16:07:29,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-15 16:07:29,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-15 16:07:29,246 INFO L87 Difference]: Start difference. First operand 29 states and 35 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-15 16:07:29,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:07:29,414 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-04-15 16:07:29,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-15 16:07:29,414 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-04-15 16:07:29,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 16:07:29,414 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-15 16:07:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2022-04-15 16:07:29,416 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-15 16:07:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2022-04-15 16:07:29,417 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 47 transitions. [2022-04-15 16:07:29,472 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 47 edges. 47 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:07:29,473 INFO L225 Difference]: With dead ends: 39 [2022-04-15 16:07:29,473 INFO L226 Difference]: Without dead ends: 36 [2022-04-15 16:07:29,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-15 16:07:29,475 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 16:07:29,475 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 96 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 16:07:29,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-15 16:07:29,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-04-15 16:07:29,489 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 16:07:29,489 INFO L82 GeneralOperation]: Start isEquivalent. First operand 36 states. Second operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-15 16:07:29,490 INFO L74 IsIncluded]: Start isIncluded. First operand 36 states. Second operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-15 16:07:29,490 INFO L87 Difference]: Start difference. First operand 36 states. Second operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-15 16:07:29,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:07:29,491 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-04-15 16:07:29,492 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-04-15 16:07:29,492 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:07:29,492 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:07:29,492 INFO L74 IsIncluded]: Start isIncluded. First operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand 36 states. [2022-04-15 16:07:29,492 INFO L87 Difference]: Start difference. First operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand 36 states. [2022-04-15 16:07:29,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:07:29,494 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-04-15 16:07:29,494 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-04-15 16:07:29,494 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:07:29,494 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:07:29,494 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 16:07:29,494 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 16:07:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-15 16:07:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-04-15 16:07:29,495 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 33 [2022-04-15 16:07:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 16:07:29,496 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-04-15 16:07:29,496 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-15 16:07:29,496 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 35 states and 41 transitions. [2022-04-15 16:07:29,539 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 41 edges. 41 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:07:29,539 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-04-15 16:07:29,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-15 16:07:29,540 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 16:07:29,540 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1] [2022-04-15 16:07:29,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-15 16:07:29,743 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 [2022-04-15 16:07:29,743 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 16:07:29,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 16:07:29,744 INFO L85 PathProgramCache]: Analyzing trace with hash 756635198, now seen corresponding path program 1 times [2022-04-15 16:07:29,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 16:07:29,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1639621635] [2022-04-15 16:07:29,746 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 16:07:29,746 INFO L85 PathProgramCache]: Analyzing trace with hash 756635198, now seen corresponding path program 2 times [2022-04-15 16:07:29,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 16:07:29,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981950087] [2022-04-15 16:07:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 16:07:29,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 16:07:29,765 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 16:07:29,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051618761] [2022-04-15 16:07:29,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 16:07:29,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 16:07:29,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 16:07:29,767 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 16:07:29,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-15 16:07:29,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-15 16:07:29,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 16:07:29,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-15 16:07:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:07:29,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 16:07:30,042 INFO L272 TraceCheckUtils]: 0: Hoare triple {900#true} call ULTIMATE.init(); {900#true} is VALID [2022-04-15 16:07:30,045 INFO L290 TraceCheckUtils]: 1: Hoare triple {900#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(7, 2);call write~init~int(108, 2, 0, 1);call write~init~int(99, 2, 1, 1);call write~init~int(109, 2, 2, 1);call write~init~int(50, 2, 3, 1);call write~init~int(46, 2, 4, 1);call write~init~int(99, 2, 5, 1);call write~init~int(0, 2, 6, 1);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,045 INFO L290 TraceCheckUtils]: 2: Hoare triple {908#(<= ~counter~0 0)} assume true; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,051 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {908#(<= ~counter~0 0)} {900#true} #73#return; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,052 INFO L272 TraceCheckUtils]: 4: Hoare triple {908#(<= ~counter~0 0)} call #t~ret7 := main(); {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,052 INFO L290 TraceCheckUtils]: 5: Hoare triple {908#(<= ~counter~0 0)} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~u~0;havoc ~v~0;~a~0 := #t~nondet4;havoc #t~nondet4;~b~0 := #t~nondet5;havoc #t~nondet5; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,053 INFO L272 TraceCheckUtils]: 6: Hoare triple {908#(<= ~counter~0 0)} call assume_abort_if_not((if ~a~0 % 4294967296 >= 1 then 1 else 0)); {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,053 INFO L290 TraceCheckUtils]: 7: Hoare triple {908#(<= ~counter~0 0)} ~cond := #in~cond; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,054 INFO L290 TraceCheckUtils]: 8: Hoare triple {908#(<= ~counter~0 0)} assume !(0 == ~cond); {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,054 INFO L290 TraceCheckUtils]: 9: Hoare triple {908#(<= ~counter~0 0)} assume true; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,054 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {908#(<= ~counter~0 0)} {908#(<= ~counter~0 0)} #61#return; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,055 INFO L272 TraceCheckUtils]: 11: Hoare triple {908#(<= ~counter~0 0)} call assume_abort_if_not((if ~b~0 % 4294967296 >= 1 then 1 else 0)); {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,055 INFO L290 TraceCheckUtils]: 12: Hoare triple {908#(<= ~counter~0 0)} ~cond := #in~cond; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,056 INFO L290 TraceCheckUtils]: 13: Hoare triple {908#(<= ~counter~0 0)} assume !(0 == ~cond); {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,056 INFO L290 TraceCheckUtils]: 14: Hoare triple {908#(<= ~counter~0 0)} assume true; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,056 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {908#(<= ~counter~0 0)} {908#(<= ~counter~0 0)} #63#return; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,057 INFO L272 TraceCheckUtils]: 16: Hoare triple {908#(<= ~counter~0 0)} call assume_abort_if_not((if ~a~0 % 4294967296 <= 65535 then 1 else 0)); {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,057 INFO L290 TraceCheckUtils]: 17: Hoare triple {908#(<= ~counter~0 0)} ~cond := #in~cond; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,057 INFO L290 TraceCheckUtils]: 18: Hoare triple {908#(<= ~counter~0 0)} assume !(0 == ~cond); {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,058 INFO L290 TraceCheckUtils]: 19: Hoare triple {908#(<= ~counter~0 0)} assume true; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,058 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {908#(<= ~counter~0 0)} {908#(<= ~counter~0 0)} #65#return; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,059 INFO L272 TraceCheckUtils]: 21: Hoare triple {908#(<= ~counter~0 0)} call assume_abort_if_not((if ~b~0 % 4294967296 <= 65535 then 1 else 0)); {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,059 INFO L290 TraceCheckUtils]: 22: Hoare triple {908#(<= ~counter~0 0)} ~cond := #in~cond; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,059 INFO L290 TraceCheckUtils]: 23: Hoare triple {908#(<= ~counter~0 0)} assume !(0 == ~cond); {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,060 INFO L290 TraceCheckUtils]: 24: Hoare triple {908#(<= ~counter~0 0)} assume true; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,060 INFO L284 TraceCheckUtils]: 25: Hoare quadruple {908#(<= ~counter~0 0)} {908#(<= ~counter~0 0)} #67#return; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,060 INFO L290 TraceCheckUtils]: 26: Hoare triple {908#(<= ~counter~0 0)} ~x~0 := ~a~0;~y~0 := ~b~0;~u~0 := ~b~0;~v~0 := ~a~0; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,061 INFO L290 TraceCheckUtils]: 27: Hoare triple {908#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {987#(<= ~counter~0 1)} is VALID [2022-04-15 16:07:30,061 INFO L290 TraceCheckUtils]: 28: Hoare triple {987#(<= ~counter~0 1)} assume !!(#t~post6 < 2);havoc #t~post6; {987#(<= ~counter~0 1)} is VALID [2022-04-15 16:07:30,062 INFO L272 TraceCheckUtils]: 29: Hoare triple {987#(<= ~counter~0 1)} call __VERIFIER_assert((if (~x~0 * ~u~0 + ~y~0 * ~v~0) % 4294967296 == 2 * ~a~0 * ~b~0 % 4294967296 then 1 else 0)); {987#(<= ~counter~0 1)} is VALID [2022-04-15 16:07:30,062 INFO L290 TraceCheckUtils]: 30: Hoare triple {987#(<= ~counter~0 1)} ~cond := #in~cond; {987#(<= ~counter~0 1)} is VALID [2022-04-15 16:07:30,062 INFO L290 TraceCheckUtils]: 31: Hoare triple {987#(<= ~counter~0 1)} assume !(0 == ~cond); {987#(<= ~counter~0 1)} is VALID [2022-04-15 16:07:30,063 INFO L290 TraceCheckUtils]: 32: Hoare triple {987#(<= ~counter~0 1)} assume true; {987#(<= ~counter~0 1)} is VALID [2022-04-15 16:07:30,063 INFO L284 TraceCheckUtils]: 33: Hoare quadruple {987#(<= ~counter~0 1)} {987#(<= ~counter~0 1)} #69#return; {987#(<= ~counter~0 1)} is VALID [2022-04-15 16:07:30,064 INFO L290 TraceCheckUtils]: 34: Hoare triple {987#(<= ~counter~0 1)} assume !!(~x~0 % 4294967296 != ~y~0 % 4294967296); {987#(<= ~counter~0 1)} is VALID [2022-04-15 16:07:30,064 INFO L290 TraceCheckUtils]: 35: Hoare triple {987#(<= ~counter~0 1)} assume ~x~0 % 4294967296 > ~y~0 % 4294967296;~x~0 := ~x~0 - ~y~0;~v~0 := ~v~0 + ~u~0; {987#(<= ~counter~0 1)} is VALID [2022-04-15 16:07:30,064 INFO L290 TraceCheckUtils]: 36: Hoare triple {987#(<= ~counter~0 1)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1015#(<= |main_#t~post6| 1)} is VALID [2022-04-15 16:07:30,065 INFO L290 TraceCheckUtils]: 37: Hoare triple {1015#(<= |main_#t~post6| 1)} assume !(#t~post6 < 2);havoc #t~post6; {901#false} is VALID [2022-04-15 16:07:30,065 INFO L272 TraceCheckUtils]: 38: Hoare triple {901#false} call __VERIFIER_assert((if (~x~0 * ~u~0 + ~y~0 * ~v~0) % 4294967296 == 2 * ~a~0 * ~b~0 % 4294967296 then 1 else 0)); {901#false} is VALID [2022-04-15 16:07:30,065 INFO L290 TraceCheckUtils]: 39: Hoare triple {901#false} ~cond := #in~cond; {901#false} is VALID [2022-04-15 16:07:30,065 INFO L290 TraceCheckUtils]: 40: Hoare triple {901#false} assume 0 == ~cond; {901#false} is VALID [2022-04-15 16:07:30,065 INFO L290 TraceCheckUtils]: 41: Hoare triple {901#false} assume !false; {901#false} is VALID [2022-04-15 16:07:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-15 16:07:30,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-15 16:07:30,268 INFO L290 TraceCheckUtils]: 41: Hoare triple {901#false} assume !false; {901#false} is VALID [2022-04-15 16:07:30,268 INFO L290 TraceCheckUtils]: 40: Hoare triple {901#false} assume 0 == ~cond; {901#false} is VALID [2022-04-15 16:07:30,268 INFO L290 TraceCheckUtils]: 39: Hoare triple {901#false} ~cond := #in~cond; {901#false} is VALID [2022-04-15 16:07:30,268 INFO L272 TraceCheckUtils]: 38: Hoare triple {901#false} call __VERIFIER_assert((if (~x~0 * ~u~0 + ~y~0 * ~v~0) % 4294967296 == 2 * ~a~0 * ~b~0 % 4294967296 then 1 else 0)); {901#false} is VALID [2022-04-15 16:07:30,269 INFO L290 TraceCheckUtils]: 37: Hoare triple {1015#(<= |main_#t~post6| 1)} assume !(#t~post6 < 2);havoc #t~post6; {901#false} is VALID [2022-04-15 16:07:30,269 INFO L290 TraceCheckUtils]: 36: Hoare triple {987#(<= ~counter~0 1)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {1015#(<= |main_#t~post6| 1)} is VALID [2022-04-15 16:07:30,270 INFO L290 TraceCheckUtils]: 35: Hoare triple {987#(<= ~counter~0 1)} assume ~x~0 % 4294967296 > ~y~0 % 4294967296;~x~0 := ~x~0 - ~y~0;~v~0 := ~v~0 + ~u~0; {987#(<= ~counter~0 1)} is VALID [2022-04-15 16:07:30,270 INFO L290 TraceCheckUtils]: 34: Hoare triple {987#(<= ~counter~0 1)} assume !!(~x~0 % 4294967296 != ~y~0 % 4294967296); {987#(<= ~counter~0 1)} is VALID [2022-04-15 16:07:30,271 INFO L284 TraceCheckUtils]: 33: Hoare quadruple {900#true} {987#(<= ~counter~0 1)} #69#return; {987#(<= ~counter~0 1)} is VALID [2022-04-15 16:07:30,271 INFO L290 TraceCheckUtils]: 32: Hoare triple {900#true} assume true; {900#true} is VALID [2022-04-15 16:07:30,271 INFO L290 TraceCheckUtils]: 31: Hoare triple {900#true} assume !(0 == ~cond); {900#true} is VALID [2022-04-15 16:07:30,271 INFO L290 TraceCheckUtils]: 30: Hoare triple {900#true} ~cond := #in~cond; {900#true} is VALID [2022-04-15 16:07:30,271 INFO L272 TraceCheckUtils]: 29: Hoare triple {987#(<= ~counter~0 1)} call __VERIFIER_assert((if (~x~0 * ~u~0 + ~y~0 * ~v~0) % 4294967296 == 2 * ~a~0 * ~b~0 % 4294967296 then 1 else 0)); {900#true} is VALID [2022-04-15 16:07:30,273 INFO L290 TraceCheckUtils]: 28: Hoare triple {987#(<= ~counter~0 1)} assume !!(#t~post6 < 2);havoc #t~post6; {987#(<= ~counter~0 1)} is VALID [2022-04-15 16:07:30,274 INFO L290 TraceCheckUtils]: 27: Hoare triple {908#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {987#(<= ~counter~0 1)} is VALID [2022-04-15 16:07:30,274 INFO L290 TraceCheckUtils]: 26: Hoare triple {908#(<= ~counter~0 0)} ~x~0 := ~a~0;~y~0 := ~b~0;~u~0 := ~b~0;~v~0 := ~a~0; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,275 INFO L284 TraceCheckUtils]: 25: Hoare quadruple {900#true} {908#(<= ~counter~0 0)} #67#return; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,275 INFO L290 TraceCheckUtils]: 24: Hoare triple {900#true} assume true; {900#true} is VALID [2022-04-15 16:07:30,275 INFO L290 TraceCheckUtils]: 23: Hoare triple {900#true} assume !(0 == ~cond); {900#true} is VALID [2022-04-15 16:07:30,275 INFO L290 TraceCheckUtils]: 22: Hoare triple {900#true} ~cond := #in~cond; {900#true} is VALID [2022-04-15 16:07:30,275 INFO L272 TraceCheckUtils]: 21: Hoare triple {908#(<= ~counter~0 0)} call assume_abort_if_not((if ~b~0 % 4294967296 <= 65535 then 1 else 0)); {900#true} is VALID [2022-04-15 16:07:30,275 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {900#true} {908#(<= ~counter~0 0)} #65#return; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,276 INFO L290 TraceCheckUtils]: 19: Hoare triple {900#true} assume true; {900#true} is VALID [2022-04-15 16:07:30,276 INFO L290 TraceCheckUtils]: 18: Hoare triple {900#true} assume !(0 == ~cond); {900#true} is VALID [2022-04-15 16:07:30,276 INFO L290 TraceCheckUtils]: 17: Hoare triple {900#true} ~cond := #in~cond; {900#true} is VALID [2022-04-15 16:07:30,276 INFO L272 TraceCheckUtils]: 16: Hoare triple {908#(<= ~counter~0 0)} call assume_abort_if_not((if ~a~0 % 4294967296 <= 65535 then 1 else 0)); {900#true} is VALID [2022-04-15 16:07:30,277 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {900#true} {908#(<= ~counter~0 0)} #63#return; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,277 INFO L290 TraceCheckUtils]: 14: Hoare triple {900#true} assume true; {900#true} is VALID [2022-04-15 16:07:30,277 INFO L290 TraceCheckUtils]: 13: Hoare triple {900#true} assume !(0 == ~cond); {900#true} is VALID [2022-04-15 16:07:30,277 INFO L290 TraceCheckUtils]: 12: Hoare triple {900#true} ~cond := #in~cond; {900#true} is VALID [2022-04-15 16:07:30,277 INFO L272 TraceCheckUtils]: 11: Hoare triple {908#(<= ~counter~0 0)} call assume_abort_if_not((if ~b~0 % 4294967296 >= 1 then 1 else 0)); {900#true} is VALID [2022-04-15 16:07:30,278 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {900#true} {908#(<= ~counter~0 0)} #61#return; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,278 INFO L290 TraceCheckUtils]: 9: Hoare triple {900#true} assume true; {900#true} is VALID [2022-04-15 16:07:30,278 INFO L290 TraceCheckUtils]: 8: Hoare triple {900#true} assume !(0 == ~cond); {900#true} is VALID [2022-04-15 16:07:30,278 INFO L290 TraceCheckUtils]: 7: Hoare triple {900#true} ~cond := #in~cond; {900#true} is VALID [2022-04-15 16:07:30,278 INFO L272 TraceCheckUtils]: 6: Hoare triple {908#(<= ~counter~0 0)} call assume_abort_if_not((if ~a~0 % 4294967296 >= 1 then 1 else 0)); {900#true} is VALID [2022-04-15 16:07:30,278 INFO L290 TraceCheckUtils]: 5: Hoare triple {908#(<= ~counter~0 0)} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~u~0;havoc ~v~0;~a~0 := #t~nondet4;havoc #t~nondet4;~b~0 := #t~nondet5;havoc #t~nondet5; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,279 INFO L272 TraceCheckUtils]: 4: Hoare triple {908#(<= ~counter~0 0)} call #t~ret7 := main(); {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,279 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {908#(<= ~counter~0 0)} {900#true} #73#return; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,279 INFO L290 TraceCheckUtils]: 2: Hoare triple {908#(<= ~counter~0 0)} assume true; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,280 INFO L290 TraceCheckUtils]: 1: Hoare triple {900#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(7, 2);call write~init~int(108, 2, 0, 1);call write~init~int(99, 2, 1, 1);call write~init~int(109, 2, 2, 1);call write~init~int(50, 2, 3, 1);call write~init~int(46, 2, 4, 1);call write~init~int(99, 2, 5, 1);call write~init~int(0, 2, 6, 1);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {908#(<= ~counter~0 0)} is VALID [2022-04-15 16:07:30,280 INFO L272 TraceCheckUtils]: 0: Hoare triple {900#true} call ULTIMATE.init(); {900#true} is VALID [2022-04-15 16:07:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-15 16:07:30,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 16:07:30,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981950087] [2022-04-15 16:07:30,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 16:07:30,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051618761] [2022-04-15 16:07:30,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051618761] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-15 16:07:30,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-15 16:07:30,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-04-15 16:07:30,281 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 16:07:30,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1639621635] [2022-04-15 16:07:30,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1639621635] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:07:30,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:07:30,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 16:07:30,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565178690] [2022-04-15 16:07:30,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 16:07:30,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-04-15 16:07:30,282 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 16:07:30,282 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-15 16:07:30,315 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 33 edges. 33 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:07:30,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-15 16:07:30,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 16:07:30,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-15 16:07:30,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-15 16:07:30,316 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-15 16:07:30,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:07:30,441 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-04-15 16:07:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-15 16:07:30,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-04-15 16:07:30,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 16:07:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-15 16:07:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 52 transitions. [2022-04-15 16:07:30,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-15 16:07:30,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 52 transitions. [2022-04-15 16:07:30,444 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 6 states and 52 transitions. [2022-04-15 16:07:30,477 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 52 edges. 52 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:07:30,478 INFO L225 Difference]: With dead ends: 45 [2022-04-15 16:07:30,478 INFO L226 Difference]: Without dead ends: 38 [2022-04-15 16:07:30,478 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-15 16:07:30,479 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 16:07:30,479 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 90 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 16:07:30,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-15 16:07:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-15 16:07:30,501 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 16:07:30,501 INFO L82 GeneralOperation]: Start isEquivalent. First operand 38 states. Second operand has 38 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-15 16:07:30,501 INFO L74 IsIncluded]: Start isIncluded. First operand 38 states. Second operand has 38 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-15 16:07:30,502 INFO L87 Difference]: Start difference. First operand 38 states. Second operand has 38 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-15 16:07:30,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:07:30,503 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-04-15 16:07:30,503 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-04-15 16:07:30,504 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:07:30,504 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:07:30,504 INFO L74 IsIncluded]: Start isIncluded. First operand has 38 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand 38 states. [2022-04-15 16:07:30,504 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand 38 states. [2022-04-15 16:07:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:07:30,505 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2022-04-15 16:07:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-04-15 16:07:30,506 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:07:30,506 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:07:30,506 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 16:07:30,506 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 16:07:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-15 16:07:30,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-04-15 16:07:30,507 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 42 [2022-04-15 16:07:30,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 16:07:30,508 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-04-15 16:07:30,508 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-15 16:07:30,508 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 38 states and 45 transitions. [2022-04-15 16:07:30,543 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 45 edges. 45 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:07:30,543 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-04-15 16:07:30,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-15 16:07:30,544 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 16:07:30,544 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 16:07:30,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-15 16:07:30,759 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 [2022-04-15 16:07:30,759 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 16:07:30,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 16:07:30,760 INFO L85 PathProgramCache]: Analyzing trace with hash 758422658, now seen corresponding path program 1 times [2022-04-15 16:07:30,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 16:07:30,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2050896616] [2022-04-15 16:07:30,760 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 16:07:30,760 INFO L85 PathProgramCache]: Analyzing trace with hash 758422658, now seen corresponding path program 2 times [2022-04-15 16:07:30,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 16:07:30,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451584112] [2022-04-15 16:07:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 16:07:30,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 16:07:30,778 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 16:07:30,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286850535] [2022-04-15 16:07:30,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 16:07:30,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 16:07:30,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 16:07:30,779 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-15 16:07:30,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process