/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/prod4br-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-e106359-m [2022-04-15 16:22:54,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-15 16:22:54,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-15 16:22:54,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-15 16:22:54,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-15 16:22:54,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-15 16:22:54,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-15 16:22:54,061 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 16:22:54,066 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-15 16:22:54,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-15 16:22:54,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-15 16:22:54,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-15 16:22:54,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-15 16:22:54,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-15 16:22:54,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-15 16:22:54,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-15 16:22:54,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-15 16:22:54,068 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-15 16:22:54,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-15 16:22:54,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-15 16:22:54,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-15 16:22:54,068 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-15 16:22:54,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-15 16:22:54,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 16:22:54,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-15 16:22:54,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-15 16:22:54,069 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-15 16:22:54,069 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-15 16:22:54,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-15 16:22:54,069 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-15 16:22:54,069 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-15 16:22:54,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-15 16:22:54,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-15 16:22:54,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-15 16:22:54,288 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-15 16:22:54,289 INFO L275 PluginConnector]: CDTParser initialized [2022-04-15 16:22:54,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2022-04-15 16:22:54,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab7dc6d7f/cacb06c637aa41f5aa6e6f00e8c6c90f/FLAGa5e6a4666 [2022-04-15 16:22:54,712 INFO L306 CDTParser]: Found 1 translation units. [2022-04-15 16:22:54,713 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound2.c [2022-04-15 16:22:54,718 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab7dc6d7f/cacb06c637aa41f5aa6e6f00e8c6c90f/FLAGa5e6a4666 [2022-04-15 16:22:55,117 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab7dc6d7f/cacb06c637aa41f5aa6e6f00e8c6c90f [2022-04-15 16:22:55,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-15 16:22:55,120 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-15 16:22:55,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-15 16:22:55,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-15 16:22:55,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-15 16:22:55,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 04:22:55" (1/1) ... [2022-04-15 16:22:55,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19b5afdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:22:55, skipping insertion in model container [2022-04-15 16:22:55,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 04:22:55" (1/1) ... [2022-04-15 16:22:55,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-15 16:22:55,139 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-15 16:22:55,267 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/prod4br-ll_unwindbound2.c[524,537] [2022-04-15 16:22:55,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 16:22:55,294 INFO L203 MainTranslator]: Completed pre-run [2022-04-15 16:22:55,302 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/prod4br-ll_unwindbound2.c[524,537] [2022-04-15 16:22:55,308 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 16:22:55,316 INFO L208 MainTranslator]: Completed translation [2022-04-15 16:22:55,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:22:55 WrapperNode [2022-04-15 16:22:55,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-15 16:22:55,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-15 16:22:55,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-15 16:22:55,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-15 16:22:55,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:22:55" (1/1) ... [2022-04-15 16:22:55,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:22:55" (1/1) ... [2022-04-15 16:22:55,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:22:55" (1/1) ... [2022-04-15 16:22:55,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:22:55" (1/1) ... [2022-04-15 16:22:55,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:22:55" (1/1) ... [2022-04-15 16:22:55,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:22:55" (1/1) ... [2022-04-15 16:22:55,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:22:55" (1/1) ... [2022-04-15 16:22:55,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-15 16:22:55,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-15 16:22:55,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-15 16:22:55,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-15 16:22:55,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:22:55" (1/1) ... [2022-04-15 16:22:55,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 16:22:55,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 16:22:55,405 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 16:22:55,411 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 16:22:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-15 16:22:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-15 16:22:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-15 16:22:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-15 16:22:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-15 16:22:55,434 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-15 16:22:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-15 16:22:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-15 16:22:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-15 16:22:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-15 16:22:55,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-15 16:22:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-15 16:22:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-15 16:22:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-15 16:22:55,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-15 16:22:55,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-15 16:22:55,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-15 16:22:55,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-15 16:22:55,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-15 16:22:55,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-15 16:22:55,482 INFO L234 CfgBuilder]: Building ICFG [2022-04-15 16:22:55,483 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-15 16:22:55,669 INFO L275 CfgBuilder]: Performing block encoding [2022-04-15 16:22:55,674 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-15 16:22:55,674 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-15 16:22:55,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:22:55 BoogieIcfgContainer [2022-04-15 16:22:55,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-15 16:22:55,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-15 16:22:55,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-15 16:22:55,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-15 16:22:55,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 04:22:55" (1/3) ... [2022-04-15 16:22:55,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd9faa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 04:22:55, skipping insertion in model container [2022-04-15 16:22:55,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 04:22:55" (2/3) ... [2022-04-15 16:22:55,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd9faa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 04:22:55, skipping insertion in model container [2022-04-15 16:22:55,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 04:22:55" (3/3) ... [2022-04-15 16:22:55,681 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound2.c [2022-04-15 16:22:55,684 INFO L202 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-15 16:22:55,684 INFO L161 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-15 16:22:55,712 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-15 16:22:55,716 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 16:22:55,716 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-15 16:22:55,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-15 16:22:55,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-15 16:22:55,736 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 16:22:55,736 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 16:22:55,737 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 16:22:55,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 16:22:55,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1717894843, now seen corresponding path program 1 times [2022-04-15 16:22:55,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 16:22:55,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1329993121] [2022-04-15 16:22:55,752 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 16:22:55,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1717894843, now seen corresponding path program 2 times [2022-04-15 16:22:55,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 16:22:55,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456010735] [2022-04-15 16:22:55,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 16:22:55,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 16:22:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:22:55,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-15 16:22:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:22:55,879 INFO L290 TraceCheckUtils]: 0: Hoare triple {44#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {35#true} is VALID [2022-04-15 16:22:55,880 INFO L290 TraceCheckUtils]: 1: Hoare triple {35#true} assume true; {35#true} is VALID [2022-04-15 16:22:55,880 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {35#true} {35#true} #77#return; {35#true} is VALID [2022-04-15 16:22:55,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-15 16:22:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:22:55,887 INFO L290 TraceCheckUtils]: 0: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-15 16:22:55,888 INFO L290 TraceCheckUtils]: 1: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-15 16:22:55,888 INFO L290 TraceCheckUtils]: 2: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-15 16:22:55,888 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {36#false} {35#true} #69#return; {36#false} is VALID [2022-04-15 16:22:55,889 INFO L272 TraceCheckUtils]: 0: Hoare triple {35#true} call ULTIMATE.init(); {44#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-15 16:22:55,889 INFO L290 TraceCheckUtils]: 1: Hoare triple {44#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {35#true} is VALID [2022-04-15 16:22:55,890 INFO L290 TraceCheckUtils]: 2: Hoare triple {35#true} assume true; {35#true} is VALID [2022-04-15 16:22:55,890 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {35#true} {35#true} #77#return; {35#true} is VALID [2022-04-15 16:22:55,890 INFO L272 TraceCheckUtils]: 4: Hoare triple {35#true} call #t~ret7 := main(); {35#true} is VALID [2022-04-15 16:22:55,890 INFO L290 TraceCheckUtils]: 5: Hoare triple {35#true} havoc ~x~0;havoc ~y~0;havoc ~a~0;havoc ~b~0;havoc ~p~0;havoc ~q~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~x~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~y~0 := #t~nondet5;havoc #t~nondet5; {35#true} is VALID [2022-04-15 16:22:55,891 INFO L272 TraceCheckUtils]: 6: Hoare triple {35#true} call assume_abort_if_not((if ~y~0 >= 1 then 1 else 0)); {35#true} is VALID [2022-04-15 16:22:55,891 INFO L290 TraceCheckUtils]: 7: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-15 16:22:55,899 INFO L290 TraceCheckUtils]: 8: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-15 16:22:55,899 INFO L290 TraceCheckUtils]: 9: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-15 16:22:55,900 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {36#false} {35#true} #69#return; {36#false} is VALID [2022-04-15 16:22:55,900 INFO L290 TraceCheckUtils]: 11: Hoare triple {36#false} ~a~0 := ~x~0;~b~0 := ~y~0;~p~0 := 1;~q~0 := 0; {36#false} is VALID [2022-04-15 16:22:55,900 INFO L290 TraceCheckUtils]: 12: Hoare triple {36#false} assume !true; {36#false} is VALID [2022-04-15 16:22:55,900 INFO L272 TraceCheckUtils]: 13: Hoare triple {36#false} call __VERIFIER_assert((if ~q~0 == ~x~0 * ~y~0 then 1 else 0)); {36#false} is VALID [2022-04-15 16:22:55,900 INFO L290 TraceCheckUtils]: 14: Hoare triple {36#false} ~cond := #in~cond; {36#false} is VALID [2022-04-15 16:22:55,901 INFO L290 TraceCheckUtils]: 15: Hoare triple {36#false} assume 0 == ~cond; {36#false} is VALID [2022-04-15 16:22:55,901 INFO L290 TraceCheckUtils]: 16: Hoare triple {36#false} assume !false; {36#false} is VALID [2022-04-15 16:22:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 16:22:55,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 16:22:55,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456010735] [2022-04-15 16:22:55,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456010735] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:22:55,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:22:55,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-15 16:22:55,905 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 16:22:55,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1329993121] [2022-04-15 16:22:55,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1329993121] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:22:55,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:22:55,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-15 16:22:55,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732383284] [2022-04-15 16:22:55,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 16:22:55,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-15 16:22:55,911 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 16:22:55,913 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 16:22:55,935 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 17 edges. 17 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:22:55,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-15 16:22:55,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 16:22:55,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-15 16:22:55,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-15 16:22:55,952 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 16:22:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:22:56,081 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2022-04-15 16:22:56,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-15 16:22:56,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-15 16:22:56,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 16:22:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 16:22:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2022-04-15 16:22:56,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 16:22:56,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2022-04-15 16:22:56,097 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 77 transitions. [2022-04-15 16:22:56,188 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 77 edges. 77 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:22:56,197 INFO L225 Difference]: With dead ends: 56 [2022-04-15 16:22:56,198 INFO L226 Difference]: Without dead ends: 28 [2022-04-15 16:22:56,200 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-15 16:22:56,206 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 16:22:56,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 16:22:56,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-15 16:22:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-04-15 16:22:56,263 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 16:22:56,264 INFO L82 GeneralOperation]: Start isEquivalent. First operand 28 states. Second operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 16:22:56,265 INFO L74 IsIncluded]: Start isIncluded. First operand 28 states. Second operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 16:22:56,266 INFO L87 Difference]: Start difference. First operand 28 states. Second operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 16:22:56,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:22:56,271 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-04-15 16:22:56,272 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-04-15 16:22:56,272 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:22:56,272 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:22:56,273 INFO L74 IsIncluded]: Start isIncluded. First operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 28 states. [2022-04-15 16:22:56,273 INFO L87 Difference]: Start difference. First operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 28 states. [2022-04-15 16:22:56,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:22:56,284 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-04-15 16:22:56,284 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-04-15 16:22:56,284 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:22:56,284 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:22:56,284 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 16:22:56,285 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 16:22:56,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 16:22:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-04-15 16:22:56,287 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2022-04-15 16:22:56,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 16:22:56,287 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-04-15 16:22:56,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 16:22:56,288 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 27 states and 33 transitions. [2022-04-15 16:22:56,317 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 16:22:56,317 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-04-15 16:22:56,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-15 16:22:56,318 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 16:22:56,318 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 16:22:56,318 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-15 16:22:56,319 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 16:22:56,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 16:22:56,320 INFO L85 PathProgramCache]: Analyzing trace with hash 444281082, now seen corresponding path program 1 times [2022-04-15 16:22:56,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 16:22:56,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1130773059] [2022-04-15 16:22:56,325 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 16:22:56,325 INFO L85 PathProgramCache]: Analyzing trace with hash 444281082, now seen corresponding path program 2 times [2022-04-15 16:22:56,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 16:22:56,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962394406] [2022-04-15 16:22:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 16:22:56,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 16:22:56,359 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 16:22:56,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039814240] [2022-04-15 16:22:56,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 16:22:56,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 16:22:56,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 16:22:56,365 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 16:22:56,366 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 16:22:56,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 16:22:56,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 16:22:56,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-15 16:22:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:22:56,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 16:22:56,591 INFO L272 TraceCheckUtils]: 0: Hoare triple {269#true} call ULTIMATE.init(); {269#true} is VALID [2022-04-15 16:22:56,592 INFO L290 TraceCheckUtils]: 1: Hoare triple {269#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {277#(<= ~counter~0 0)} is VALID [2022-04-15 16:22:56,592 INFO L290 TraceCheckUtils]: 2: Hoare triple {277#(<= ~counter~0 0)} assume true; {277#(<= ~counter~0 0)} is VALID [2022-04-15 16:22:56,593 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {277#(<= ~counter~0 0)} {269#true} #77#return; {277#(<= ~counter~0 0)} is VALID [2022-04-15 16:22:56,593 INFO L272 TraceCheckUtils]: 4: Hoare triple {277#(<= ~counter~0 0)} call #t~ret7 := main(); {277#(<= ~counter~0 0)} is VALID [2022-04-15 16:22:56,593 INFO L290 TraceCheckUtils]: 5: Hoare triple {277#(<= ~counter~0 0)} havoc ~x~0;havoc ~y~0;havoc ~a~0;havoc ~b~0;havoc ~p~0;havoc ~q~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~x~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~y~0 := #t~nondet5;havoc #t~nondet5; {277#(<= ~counter~0 0)} is VALID [2022-04-15 16:22:56,594 INFO L272 TraceCheckUtils]: 6: Hoare triple {277#(<= ~counter~0 0)} call assume_abort_if_not((if ~y~0 >= 1 then 1 else 0)); {277#(<= ~counter~0 0)} is VALID [2022-04-15 16:22:56,595 INFO L290 TraceCheckUtils]: 7: Hoare triple {277#(<= ~counter~0 0)} ~cond := #in~cond; {277#(<= ~counter~0 0)} is VALID [2022-04-15 16:22:56,595 INFO L290 TraceCheckUtils]: 8: Hoare triple {277#(<= ~counter~0 0)} assume !(0 == ~cond); {277#(<= ~counter~0 0)} is VALID [2022-04-15 16:22:56,595 INFO L290 TraceCheckUtils]: 9: Hoare triple {277#(<= ~counter~0 0)} assume true; {277#(<= ~counter~0 0)} is VALID [2022-04-15 16:22:56,596 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {277#(<= ~counter~0 0)} {277#(<= ~counter~0 0)} #69#return; {277#(<= ~counter~0 0)} is VALID [2022-04-15 16:22:56,596 INFO L290 TraceCheckUtils]: 11: Hoare triple {277#(<= ~counter~0 0)} ~a~0 := ~x~0;~b~0 := ~y~0;~p~0 := 1;~q~0 := 0; {277#(<= ~counter~0 0)} is VALID [2022-04-15 16:22:56,597 INFO L290 TraceCheckUtils]: 12: Hoare triple {277#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {311#(<= |main_#t~post6| 0)} is VALID [2022-04-15 16:22:56,597 INFO L290 TraceCheckUtils]: 13: Hoare triple {311#(<= |main_#t~post6| 0)} assume !(#t~post6 < 2);havoc #t~post6; {270#false} is VALID [2022-04-15 16:22:56,597 INFO L272 TraceCheckUtils]: 14: Hoare triple {270#false} call __VERIFIER_assert((if ~q~0 == ~x~0 * ~y~0 then 1 else 0)); {270#false} is VALID [2022-04-15 16:22:56,597 INFO L290 TraceCheckUtils]: 15: Hoare triple {270#false} ~cond := #in~cond; {270#false} is VALID [2022-04-15 16:22:56,597 INFO L290 TraceCheckUtils]: 16: Hoare triple {270#false} assume 0 == ~cond; {270#false} is VALID [2022-04-15 16:22:56,598 INFO L290 TraceCheckUtils]: 17: Hoare triple {270#false} assume !false; {270#false} is VALID [2022-04-15 16:22:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 16:22:56,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 16:22:56,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 16:22:56,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962394406] [2022-04-15 16:22:56,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 16:22:56,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039814240] [2022-04-15 16:22:56,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039814240] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:22:56,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:22:56,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-15 16:22:56,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 16:22:56,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1130773059] [2022-04-15 16:22:56,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1130773059] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:22:56,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:22:56,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-15 16:22:56,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082757302] [2022-04-15 16:22:56,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 16:22:56,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-15 16:22:56,602 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 16:22:56,602 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 16:22:56,614 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:22:56,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-15 16:22:56,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 16:22:56,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-15 16:22:56,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-15 16:22:56,616 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, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 16:22:56,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:22:56,683 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-04-15 16:22:56,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-15 16:22:56,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-04-15 16:22:56,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 16:22:56,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 16:22:56,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2022-04-15 16:22:56,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 16:22:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2022-04-15 16:22:56,694 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 44 transitions. [2022-04-15 16:22:56,722 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 44 edges. 44 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:22:56,723 INFO L225 Difference]: With dead ends: 37 [2022-04-15 16:22:56,723 INFO L226 Difference]: Without dead ends: 29 [2022-04-15 16:22:56,724 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-15 16:22:56,726 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 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 16:22:56,729 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 16:22:56,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-15 16:22:56,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-15 16:22:56,746 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 16:22:56,746 INFO L82 GeneralOperation]: Start isEquivalent. First operand 29 states. Second operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 16:22:56,747 INFO L74 IsIncluded]: Start isIncluded. First operand 29 states. Second operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 16:22:56,748 INFO L87 Difference]: Start difference. First operand 29 states. Second operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 16:22:56,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:22:56,750 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-04-15 16:22:56,750 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-04-15 16:22:56,751 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:22:56,751 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:22:56,753 INFO L74 IsIncluded]: Start isIncluded. First operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 29 states. [2022-04-15 16:22:56,753 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand 29 states. [2022-04-15 16:22:56,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:22:56,756 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-04-15 16:22:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-04-15 16:22:56,757 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:22:56,757 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:22:56,757 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 16:22:56,757 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 16:22:56,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-04-15 16:22:56,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-04-15 16:22:56,763 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2022-04-15 16:22:56,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 16:22:56,764 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-04-15 16:22:56,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-15 16:22:56,764 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 29 states and 35 transitions. [2022-04-15 16:22:56,788 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 16:22:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-04-15 16:22:56,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-15 16:22:56,790 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 16:22:56,793 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 16:22:56,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-15 16:22:57,007 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 16:22:57,008 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 16:22:57,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 16:22:57,008 INFO L85 PathProgramCache]: Analyzing trace with hash 446068542, now seen corresponding path program 1 times [2022-04-15 16:22:57,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 16:22:57,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [171486440] [2022-04-15 16:22:57,009 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 16:22:57,009 INFO L85 PathProgramCache]: Analyzing trace with hash 446068542, now seen corresponding path program 2 times [2022-04-15 16:22:57,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 16:22:57,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962651939] [2022-04-15 16:22:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 16:22:57,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 16:22:57,023 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 16:22:57,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224157013] [2022-04-15 16:22:57,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 16:22:57,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 16:22:57,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 16:22:57,028 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 16:22:57,029 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 16:22:57,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 16:22:57,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 16:22:57,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-15 16:22:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:22:57,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 16:22:57,219 INFO L272 TraceCheckUtils]: 0: Hoare triple {516#true} call ULTIMATE.init(); {516#true} is VALID [2022-04-15 16:22:57,219 INFO L290 TraceCheckUtils]: 1: Hoare triple {516#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {516#true} is VALID [2022-04-15 16:22:57,220 INFO L290 TraceCheckUtils]: 2: Hoare triple {516#true} assume true; {516#true} is VALID [2022-04-15 16:22:57,220 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {516#true} {516#true} #77#return; {516#true} is VALID [2022-04-15 16:22:57,221 INFO L272 TraceCheckUtils]: 4: Hoare triple {516#true} call #t~ret7 := main(); {516#true} is VALID [2022-04-15 16:22:57,221 INFO L290 TraceCheckUtils]: 5: Hoare triple {516#true} havoc ~x~0;havoc ~y~0;havoc ~a~0;havoc ~b~0;havoc ~p~0;havoc ~q~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~x~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~y~0 := #t~nondet5;havoc #t~nondet5; {516#true} is VALID [2022-04-15 16:22:57,223 INFO L272 TraceCheckUtils]: 6: Hoare triple {516#true} call assume_abort_if_not((if ~y~0 >= 1 then 1 else 0)); {516#true} is VALID [2022-04-15 16:22:57,223 INFO L290 TraceCheckUtils]: 7: Hoare triple {516#true} ~cond := #in~cond; {516#true} is VALID [2022-04-15 16:22:57,223 INFO L290 TraceCheckUtils]: 8: Hoare triple {516#true} assume !(0 == ~cond); {516#true} is VALID [2022-04-15 16:22:57,224 INFO L290 TraceCheckUtils]: 9: Hoare triple {516#true} assume true; {516#true} is VALID [2022-04-15 16:22:57,225 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {516#true} {516#true} #69#return; {516#true} is VALID [2022-04-15 16:22:57,225 INFO L290 TraceCheckUtils]: 11: Hoare triple {516#true} ~a~0 := ~x~0;~b~0 := ~y~0;~p~0 := 1;~q~0 := 0; {554#(and (= main_~b~0 main_~y~0) (= main_~q~0 0) (= main_~a~0 main_~x~0) (= main_~p~0 1))} is VALID [2022-04-15 16:22:57,226 INFO L290 TraceCheckUtils]: 12: Hoare triple {554#(and (= main_~b~0 main_~y~0) (= main_~q~0 0) (= main_~a~0 main_~x~0) (= main_~p~0 1))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {554#(and (= main_~b~0 main_~y~0) (= main_~q~0 0) (= main_~a~0 main_~x~0) (= main_~p~0 1))} is VALID [2022-04-15 16:22:57,231 INFO L290 TraceCheckUtils]: 13: Hoare triple {554#(and (= main_~b~0 main_~y~0) (= main_~q~0 0) (= main_~a~0 main_~x~0) (= main_~p~0 1))} assume !!(#t~post6 < 2);havoc #t~post6; {554#(and (= main_~b~0 main_~y~0) (= main_~q~0 0) (= main_~a~0 main_~x~0) (= main_~p~0 1))} is VALID [2022-04-15 16:22:57,232 INFO L272 TraceCheckUtils]: 14: Hoare triple {554#(and (= main_~b~0 main_~y~0) (= main_~q~0 0) (= main_~a~0 main_~x~0) (= main_~p~0 1))} call __VERIFIER_assert((if ~q~0 + ~a~0 * ~b~0 * ~p~0 == ~x~0 * ~y~0 then 1 else 0)); {564#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 16:22:57,233 INFO L290 TraceCheckUtils]: 15: Hoare triple {564#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {568#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 16:22:57,233 INFO L290 TraceCheckUtils]: 16: Hoare triple {568#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {517#false} is VALID [2022-04-15 16:22:57,233 INFO L290 TraceCheckUtils]: 17: Hoare triple {517#false} assume !false; {517#false} is VALID [2022-04-15 16:22:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 16:22:57,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 16:22:57,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 16:22:57,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962651939] [2022-04-15 16:22:57,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 16:22:57,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224157013] [2022-04-15 16:22:57,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224157013] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:22:57,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:22:57,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 16:22:57,235 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 16:22:57,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [171486440] [2022-04-15 16:22:57,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [171486440] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:22:57,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:22:57,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 16:22:57,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552045262] [2022-04-15 16:22:57,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 16:22:57,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-15 16:22:57,237 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 16:22:57,237 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 16:22:57,253 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 18 edges. 18 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:22:57,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-15 16:22:57,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 16:22:57,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-15 16:22:57,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-15 16:22:57,254 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 16:22:57,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:22:57,407 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-04-15 16:22:57,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-15 16:22:57,408 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-04-15 16:22:57,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 16:22:57,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 16:22:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2022-04-15 16:22:57,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 16:22:57,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2022-04-15 16:22:57,411 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 53 transitions. [2022-04-15 16:22:57,460 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 53 edges. 53 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:22:57,462 INFO L225 Difference]: With dead ends: 42 [2022-04-15 16:22:57,462 INFO L226 Difference]: Without dead ends: 40 [2022-04-15 16:22:57,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-15 16:22:57,463 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 16:22:57,463 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 83 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 16:22:57,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-15 16:22:57,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-04-15 16:22:57,476 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 16:22:57,476 INFO L82 GeneralOperation]: Start isEquivalent. First operand 40 states. Second operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-15 16:22:57,477 INFO L74 IsIncluded]: Start isIncluded. First operand 40 states. Second operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-15 16:22:57,477 INFO L87 Difference]: Start difference. First operand 40 states. Second operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-15 16:22:57,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:22:57,479 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-04-15 16:22:57,480 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-04-15 16:22:57,480 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:22:57,480 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:22:57,480 INFO L74 IsIncluded]: Start isIncluded. First operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand 40 states. [2022-04-15 16:22:57,481 INFO L87 Difference]: Start difference. First operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand 40 states. [2022-04-15 16:22:57,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:22:57,482 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2022-04-15 16:22:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-04-15 16:22:57,483 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:22:57,483 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:22:57,483 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 16:22:57,483 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 16:22:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-15 16:22:57,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-04-15 16:22:57,484 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2022-04-15 16:22:57,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 16:22:57,485 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-04-15 16:22:57,485 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-15 16:22:57,485 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 34 states and 40 transitions. [2022-04-15 16:22:57,534 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 40 edges. 40 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 16:22:57,535 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-04-15 16:22:57,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-15 16:22:57,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 16:22:57,535 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 16:22:57,556 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 16:22:57,743 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 16:22:57,744 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 16:22:57,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 16:22:57,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1308579644, now seen corresponding path program 1 times [2022-04-15 16:22:57,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 16:22:57,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [185282769] [2022-04-15 16:22:57,745 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 16:22:57,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1308579644, now seen corresponding path program 2 times [2022-04-15 16:22:57,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 16:22:57,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895550542] [2022-04-15 16:22:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 16:22:57,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 16:22:57,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 16:22:57,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [819738384] [2022-04-15 16:22:57,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 16:22:57,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 16:22:57,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 16:22:57,762 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 16:22:57,763 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 16:22:57,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-15 16:22:57,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 16:22:57,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-15 16:22:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 16:22:57,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 16:23:08,228 INFO L272 TraceCheckUtils]: 0: Hoare triple {808#true} call ULTIMATE.init(); {808#true} is VALID [2022-04-15 16:23:08,228 INFO L290 TraceCheckUtils]: 1: Hoare triple {808#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {808#true} is VALID [2022-04-15 16:23:08,228 INFO L290 TraceCheckUtils]: 2: Hoare triple {808#true} assume true; {808#true} is VALID [2022-04-15 16:23:08,228 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {808#true} {808#true} #77#return; {808#true} is VALID [2022-04-15 16:23:08,229 INFO L272 TraceCheckUtils]: 4: Hoare triple {808#true} call #t~ret7 := main(); {808#true} is VALID [2022-04-15 16:23:08,229 INFO L290 TraceCheckUtils]: 5: Hoare triple {808#true} havoc ~x~0;havoc ~y~0;havoc ~a~0;havoc ~b~0;havoc ~p~0;havoc ~q~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~x~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~y~0 := #t~nondet5;havoc #t~nondet5; {808#true} is VALID [2022-04-15 16:23:08,229 INFO L272 TraceCheckUtils]: 6: Hoare triple {808#true} call assume_abort_if_not((if ~y~0 >= 1 then 1 else 0)); {808#true} is VALID [2022-04-15 16:23:08,229 INFO L290 TraceCheckUtils]: 7: Hoare triple {808#true} ~cond := #in~cond; {834#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} is VALID [2022-04-15 16:23:08,230 INFO L290 TraceCheckUtils]: 8: Hoare triple {834#(= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)} assume !(0 == ~cond); {838#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-15 16:23:08,230 INFO L290 TraceCheckUtils]: 9: Hoare triple {838#(not (= |assume_abort_if_not_#in~cond| 0))} assume true; {838#(not (= |assume_abort_if_not_#in~cond| 0))} is VALID [2022-04-15 16:23:08,232 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {838#(not (= |assume_abort_if_not_#in~cond| 0))} {808#true} #69#return; {845#(<= 1 main_~y~0)} is VALID [2022-04-15 16:23:08,232 INFO L290 TraceCheckUtils]: 11: Hoare triple {845#(<= 1 main_~y~0)} ~a~0 := ~x~0;~b~0 := ~y~0;~p~0 := 1;~q~0 := 0; {849#(and (<= main_~y~0 main_~b~0) (<= 1 main_~y~0))} is VALID [2022-04-15 16:23:08,233 INFO L290 TraceCheckUtils]: 12: Hoare triple {849#(and (<= main_~y~0 main_~b~0) (<= 1 main_~y~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {849#(and (<= main_~y~0 main_~b~0) (<= 1 main_~y~0))} is VALID [2022-04-15 16:23:08,233 INFO L290 TraceCheckUtils]: 13: Hoare triple {849#(and (<= main_~y~0 main_~b~0) (<= 1 main_~y~0))} assume !!(#t~post6 < 2);havoc #t~post6; {849#(and (<= main_~y~0 main_~b~0) (<= 1 main_~y~0))} is VALID [2022-04-15 16:23:08,233 INFO L272 TraceCheckUtils]: 14: Hoare triple {849#(and (<= main_~y~0 main_~b~0) (<= 1 main_~y~0))} call __VERIFIER_assert((if ~q~0 + ~a~0 * ~b~0 * ~p~0 == ~x~0 * ~y~0 then 1 else 0)); {808#true} is VALID [2022-04-15 16:23:08,233 INFO L290 TraceCheckUtils]: 15: Hoare triple {808#true} ~cond := #in~cond; {862#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} is VALID [2022-04-15 16:23:08,234 INFO L290 TraceCheckUtils]: 16: Hoare triple {862#(= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)} assume !(0 == ~cond); {866#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 16:23:08,234 INFO L290 TraceCheckUtils]: 17: Hoare triple {866#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {866#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 16:23:10,237 WARN L284 TraceCheckUtils]: 18: Hoare quadruple {866#(not (= |__VERIFIER_assert_#in~cond| 0))} {849#(and (<= main_~y~0 main_~b~0) (<= 1 main_~y~0))} #71#return; {873#(and (or (and (= (mod (+ (* main_~y~0 main_~x~0) (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~a~0 0))) (= (+ (* main_~y~0 main_~x~0) (* (- 1) main_~q~0)) 0)) (<= main_~y~0 main_~b~0) (<= 1 main_~y~0))} is UNKNOWN [2022-04-15 16:23:10,238 INFO L290 TraceCheckUtils]: 19: Hoare triple {873#(and (or (and (= (mod (+ (* main_~y~0 main_~x~0) (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~a~0 0))) (= (+ (* main_~y~0 main_~x~0) (* (- 1) main_~q~0)) 0)) (<= main_~y~0 main_~b~0) (<= 1 main_~y~0))} assume !(0 != ~a~0 && 0 != ~b~0); {877#(and (= main_~q~0 (* main_~y~0 main_~x~0)) (<= 1 main_~y~0))} is VALID [2022-04-15 16:23:10,238 INFO L272 TraceCheckUtils]: 20: Hoare triple {877#(and (= main_~q~0 (* main_~y~0 main_~x~0)) (<= 1 main_~y~0))} call __VERIFIER_assert((if ~q~0 == ~x~0 * ~y~0 then 1 else 0)); {881#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 16:23:10,239 INFO L290 TraceCheckUtils]: 21: Hoare triple {881#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {885#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 16:23:10,241 INFO L290 TraceCheckUtils]: 22: Hoare triple {885#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {809#false} is VALID [2022-04-15 16:23:10,241 INFO L290 TraceCheckUtils]: 23: Hoare triple {809#false} assume !false; {809#false} is VALID [2022-04-15 16:23:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 16:23:10,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-15 16:23:49,506 INFO L290 TraceCheckUtils]: 23: Hoare triple {809#false} assume !false; {809#false} is VALID [2022-04-15 16:23:49,507 INFO L290 TraceCheckUtils]: 22: Hoare triple {885#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {809#false} is VALID [2022-04-15 16:23:49,507 INFO L290 TraceCheckUtils]: 21: Hoare triple {881#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {885#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 16:23:49,508 INFO L272 TraceCheckUtils]: 20: Hoare triple {901#(= main_~q~0 (* main_~y~0 main_~x~0))} call __VERIFIER_assert((if ~q~0 == ~x~0 * ~y~0 then 1 else 0)); {881#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 16:23:49,508 INFO L290 TraceCheckUtils]: 19: Hoare triple {905#(or (= main_~q~0 (* main_~y~0 main_~x~0)) (and (not (= main_~b~0 0)) (not (= main_~a~0 0))))} assume !(0 != ~a~0 && 0 != ~b~0); {901#(= main_~q~0 (* main_~y~0 main_~x~0))} is VALID [2022-04-15 16:23:49,510 INFO L284 TraceCheckUtils]: 18: Hoare quadruple {866#(not (= |__VERIFIER_assert_#in~cond| 0))} {808#true} #71#return; {905#(or (= main_~q~0 (* main_~y~0 main_~x~0)) (and (not (= main_~b~0 0)) (not (= main_~a~0 0))))} is VALID [2022-04-15 16:23:49,510 INFO L290 TraceCheckUtils]: 17: Hoare triple {866#(not (= |__VERIFIER_assert_#in~cond| 0))} assume true; {866#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 16:23:49,511 INFO L290 TraceCheckUtils]: 16: Hoare triple {918#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} assume !(0 == ~cond); {866#(not (= |__VERIFIER_assert_#in~cond| 0))} is VALID [2022-04-15 16:23:49,511 INFO L290 TraceCheckUtils]: 15: Hoare triple {808#true} ~cond := #in~cond; {918#(or (not (= |__VERIFIER_assert_#in~cond| 0)) (= __VERIFIER_assert_~cond 0))} is VALID [2022-04-15 16:23:49,511 INFO L272 TraceCheckUtils]: 14: Hoare triple {808#true} call __VERIFIER_assert((if ~q~0 + ~a~0 * ~b~0 * ~p~0 == ~x~0 * ~y~0 then 1 else 0)); {808#true} is VALID [2022-04-15 16:23:49,511 INFO L290 TraceCheckUtils]: 13: Hoare triple {808#true} assume !!(#t~post6 < 2);havoc #t~post6; {808#true} is VALID [2022-04-15 16:23:49,511 INFO L290 TraceCheckUtils]: 12: Hoare triple {808#true} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {808#true} is VALID [2022-04-15 16:23:49,511 INFO L290 TraceCheckUtils]: 11: Hoare triple {808#true} ~a~0 := ~x~0;~b~0 := ~y~0;~p~0 := 1;~q~0 := 0; {808#true} is VALID [2022-04-15 16:23:49,512 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {808#true} {808#true} #69#return; {808#true} is VALID [2022-04-15 16:23:49,512 INFO L290 TraceCheckUtils]: 9: Hoare triple {808#true} assume true; {808#true} is VALID [2022-04-15 16:23:49,512 INFO L290 TraceCheckUtils]: 8: Hoare triple {808#true} assume !(0 == ~cond); {808#true} is VALID [2022-04-15 16:23:49,512 INFO L290 TraceCheckUtils]: 7: Hoare triple {808#true} ~cond := #in~cond; {808#true} is VALID [2022-04-15 16:23:49,512 INFO L272 TraceCheckUtils]: 6: Hoare triple {808#true} call assume_abort_if_not((if ~y~0 >= 1 then 1 else 0)); {808#true} is VALID [2022-04-15 16:23:49,512 INFO L290 TraceCheckUtils]: 5: Hoare triple {808#true} havoc ~x~0;havoc ~y~0;havoc ~a~0;havoc ~b~0;havoc ~p~0;havoc ~q~0;assume -2147483648 <= #t~nondet4 && #t~nondet4 <= 2147483647;~x~0 := #t~nondet4;havoc #t~nondet4;assume -2147483648 <= #t~nondet5 && #t~nondet5 <= 2147483647;~y~0 := #t~nondet5;havoc #t~nondet5; {808#true} is VALID [2022-04-15 16:23:49,512 INFO L272 TraceCheckUtils]: 4: Hoare triple {808#true} call #t~ret7 := main(); {808#true} is VALID [2022-04-15 16:23:49,512 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {808#true} {808#true} #77#return; {808#true} is VALID [2022-04-15 16:23:49,512 INFO L290 TraceCheckUtils]: 2: Hoare triple {808#true} assume true; {808#true} is VALID [2022-04-15 16:23:49,513 INFO L290 TraceCheckUtils]: 1: Hoare triple {808#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(13, 2);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {808#true} is VALID [2022-04-15 16:23:49,513 INFO L272 TraceCheckUtils]: 0: Hoare triple {808#true} call ULTIMATE.init(); {808#true} is VALID [2022-04-15 16:23:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-15 16:23:49,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 16:23:49,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895550542] [2022-04-15 16:23:49,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 16:23:49,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819738384] [2022-04-15 16:23:49,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819738384] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-15 16:23:49,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-15 16:23:49,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-04-15 16:23:49,514 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 16:23:49,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [185282769] [2022-04-15 16:23:49,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [185282769] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 16:23:49,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 16:23:49,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-15 16:23:49,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207649571] [2022-04-15 16:23:49,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 16:23:49,514 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-04-15 16:23:49,515 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 16:23:49,515 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-15 16:23:51,534 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 23 inductive. 0 not inductive. 1 times theorem prover too weak to decide inductivity. [2022-04-15 16:23:51,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-15 16:23:51,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 16:23:51,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-15 16:23:51,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-04-15 16:23:51,536 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-15 16:23:57,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:23:57,276 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-04-15 16:23:57,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-15 16:23:57,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-04-15 16:23:57,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 16:23:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-15 16:23:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 60 transitions. [2022-04-15 16:23:57,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-15 16:23:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 60 transitions. [2022-04-15 16:23:57,279 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 13 states and 60 transitions. [2022-04-15 16:23:59,328 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 60 edges. 59 inductive. 0 not inductive. 1 times theorem prover too weak to decide inductivity. [2022-04-15 16:23:59,329 INFO L225 Difference]: With dead ends: 50 [2022-04-15 16:23:59,329 INFO L226 Difference]: Without dead ends: 48 [2022-04-15 16:23:59,330 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-04-15 16:23:59,330 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-15 16:23:59,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 130 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-15 16:23:59,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-15 16:23:59,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2022-04-15 16:23:59,368 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 16:23:59,368 INFO L82 GeneralOperation]: Start isEquivalent. First operand 48 states. Second operand has 45 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 33 states have internal predecessors, (40), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-15 16:23:59,369 INFO L74 IsIncluded]: Start isIncluded. First operand 48 states. Second operand has 45 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 33 states have internal predecessors, (40), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-15 16:23:59,369 INFO L87 Difference]: Start difference. First operand 48 states. Second operand has 45 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 33 states have internal predecessors, (40), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-15 16:23:59,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:23:59,371 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-04-15 16:23:59,371 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2022-04-15 16:23:59,371 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:23:59,371 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:23:59,371 INFO L74 IsIncluded]: Start isIncluded. First operand has 45 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 33 states have internal predecessors, (40), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) Second operand 48 states. [2022-04-15 16:23:59,372 INFO L87 Difference]: Start difference. First operand has 45 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 33 states have internal predecessors, (40), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) Second operand 48 states. [2022-04-15 16:23:59,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 16:23:59,373 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-04-15 16:23:59,373 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2022-04-15 16:23:59,374 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 16:23:59,374 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 16:23:59,374 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 16:23:59,374 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 16:23:59,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 33 states have internal predecessors, (40), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-15 16:23:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-04-15 16:23:59,375 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 24 [2022-04-15 16:23:59,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 16:23:59,375 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-04-15 16:23:59,376 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-15 16:23:59,376 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 45 states and 56 transitions. [2022-04-15 16:24:01,426 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 56 edges. 55 inductive. 0 not inductive. 1 times theorem prover too weak to decide inductivity. [2022-04-15 16:24:01,426 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-04-15 16:24:01,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-15 16:24:01,427 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 16:24:01,427 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 16:24:01,443 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 16:24:01,627 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 16:24:01,628 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 16:24:01,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 16:24:01,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1797927234, now seen corresponding path program 1 times [2022-04-15 16:24:01,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 16:24:01,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1196908211] [2022-04-15 16:24:07,710 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialTermUtils.applyModuloToAllCoefficients(PolynomialTermUtils.java:313) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.AffineTerm.applyModuloToAllCoefficients(AffineTerm.java:208) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.mod(SmtUtils.java:1867) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1454) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.termWithLocalSimplification(SmtUtils.java:1378) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.convertApplicationTerm(SmtUtils.java:1367) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.Substitution.convertApplicationTerm(Substitution.java:53) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:352) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:285) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.Substitution.apply(Substitution.java:59) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractor.getUpdates(QvasrAbstractor.java:1247) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrAbstractor.computeAbstraction(QvasrAbstractor.java:110) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrSummarizer.summarizeLoop(QvasrSummarizer.java:129) at de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.qvasr.QvasrLoopSummarization.getQvasrAcceleration(QvasrLoopSummarization.java:87) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.loopaccelerator.AcceleratorQvasr.accelerateLoop(AcceleratorQvasr.java:91) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolationCore.acceleratedInterpolationCoreIsCorrect(AcceleratedInterpolationCore.java:246) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:195) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleAcceleratedInterpolation.construct(IpTcStrategyModuleAcceleratedInterpolation.java:80) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:595) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:349) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:331) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:411) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:301) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:261) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:153) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-04-15 16:24:07,715 INFO L158 Benchmark]: Toolchain (without parser) took 72595.51ms. Allocated memory was 182.5MB in the beginning and 282.1MB in the end (delta: 99.6MB). Free memory was 128.1MB in the beginning and 211.6MB in the end (delta: -83.5MB). Peak memory consumption was 16.3MB. Max. memory is 8.0GB. [2022-04-15 16:24:07,719 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 182.5MB. Free memory is still 144.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-15 16:24:07,720 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.21ms. Allocated memory was 182.5MB in the beginning and 282.1MB in the end (delta: 99.6MB). Free memory was 127.8MB in the beginning and 253.8MB in the end (delta: -126.0MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. [2022-04-15 16:24:07,720 INFO L158 Benchmark]: Boogie Preprocessor took 39.71ms. Allocated memory is still 282.1MB. Free memory was 253.8MB in the beginning and 252.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-15 16:24:07,720 INFO L158 Benchmark]: RCFGBuilder took 317.64ms. Allocated memory is still 282.1MB. Free memory was 252.1MB in the beginning and 239.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-15 16:24:07,720 INFO L158 Benchmark]: TraceAbstraction took 72038.20ms. Allocated memory is still 282.1MB. Free memory was 238.8MB in the beginning and 211.6MB in the end (delta: 27.3MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. [2022-04-15 16:24:07,721 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 182.5MB. Free memory is still 144.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 196.21ms. Allocated memory was 182.5MB in the beginning and 282.1MB in the end (delta: 99.6MB). Free memory was 127.8MB in the beginning and 253.8MB in the end (delta: -126.0MB). Peak memory consumption was 13.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 39.71ms. Allocated memory is still 282.1MB. Free memory was 253.8MB in the beginning and 252.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 317.64ms. Allocated memory is still 282.1MB. Free memory was 252.1MB in the beginning and 239.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 72038.20ms. Allocated memory is still 282.1MB. Free memory was 238.8MB in the beginning and 211.6MB in the end (delta: 27.3MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.polynomials.PolynomialTermUtils.applyModuloToAllCoefficients(PolynomialTermUtils.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-04-15 16:24:07,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...