/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-08 13:39:38,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-08 13:39:38,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-08 13:39:38,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-08 13:39:38,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-08 13:39:38,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-08 13:39:38,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-08 13:39:38,895 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-08 13:39:38,908 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-08 13:39:38,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-08 13:39:38,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-08 13:39:38,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-08 13:39:38,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-08 13:39:38,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-08 13:39:38,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-08 13:39:38,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-08 13:39:38,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-08 13:39:38,911 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-08 13:39:38,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-08 13:39:38,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-08 13:39:38,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-08 13:39:38,911 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-08 13:39:38,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-08 13:39:38,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-08 13:39:38,912 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-08 13:39:38,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-08 13:39:38,912 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-08 13:39:38,912 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-08 13:39:38,912 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-08 13:39:38,912 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-08 13:39:38,912 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-08 13:39:39,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-08 13:39:39,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-08 13:39:39,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-08 13:39:39,146 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-08 13:39:39,148 INFO L275 PluginConnector]: CDTParser initialized [2022-04-08 13:39:39,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound1.c [2022-04-08 13:39:39,211 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7eb5706f8/8265f820ec3144f98435c3bedfb618e0/FLAG51f0b2e0a [2022-04-08 13:39:39,615 INFO L306 CDTParser]: Found 1 translation units. [2022-04-08 13:39:39,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound1.c [2022-04-08 13:39:39,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7eb5706f8/8265f820ec3144f98435c3bedfb618e0/FLAG51f0b2e0a [2022-04-08 13:39:39,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7eb5706f8/8265f820ec3144f98435c3bedfb618e0 [2022-04-08 13:39:39,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-08 13:39:39,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-08 13:39:39,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-08 13:39:39,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-08 13:39:39,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-08 13:39:39,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.04 01:39:39" (1/1) ... [2022-04-08 13:39:39,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cc2018c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 01:39:39, skipping insertion in model container [2022-04-08 13:39:39,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.04 01:39:39" (1/1) ... [2022-04-08 13:39:39,650 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-08 13:39:39,660 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-08 13:39:39,790 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound1.c[537,550] [2022-04-08 13:39:39,805 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-08 13:39:39,812 INFO L203 MainTranslator]: Completed pre-run [2022-04-08 13:39:39,823 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/lcm2_unwindbound1.c[537,550] [2022-04-08 13:39:39,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-08 13:39:39,841 INFO L208 MainTranslator]: Completed translation [2022-04-08 13:39:39,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 01:39:39 WrapperNode [2022-04-08 13:39:39,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-08 13:39:39,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-08 13:39:39,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-08 13:39:39,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-08 13:39:39,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 01:39:39" (1/1) ... [2022-04-08 13:39:39,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 01:39:39" (1/1) ... [2022-04-08 13:39:39,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 01:39:39" (1/1) ... [2022-04-08 13:39:39,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 01:39:39" (1/1) ... [2022-04-08 13:39:39,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 01:39:39" (1/1) ... [2022-04-08 13:39:39,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 01:39:39" (1/1) ... [2022-04-08 13:39:39,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 01:39:39" (1/1) ... [2022-04-08 13:39:39,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-08 13:39:39,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-08 13:39:39,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-08 13:39:39,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-08 13:39:39,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 01:39:39" (1/1) ... [2022-04-08 13:39:39,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-08 13:39:39,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 13:39:39,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-08 13:39:39,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-08 13:39:39,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-08 13:39:39,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-08 13:39:39,954 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-08 13:39:39,954 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-08 13:39:39,955 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-08 13:39:39,955 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-08 13:39:39,955 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-08 13:39:39,955 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-08 13:39:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-08 13:39:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-08 13:39:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-08 13:39:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-08 13:39:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-08 13:39:39,956 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-08 13:39:39,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-08 13:39:39,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-08 13:39:39,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-08 13:39:39,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-08 13:39:39,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-08 13:39:39,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-08 13:39:40,017 INFO L234 CfgBuilder]: Building ICFG [2022-04-08 13:39:40,018 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-08 13:39:40,138 INFO L275 CfgBuilder]: Performing block encoding [2022-04-08 13:39:40,144 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-08 13:39:40,144 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-08 13:39:40,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.04 01:39:40 BoogieIcfgContainer [2022-04-08 13:39:40,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-08 13:39:40,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-08 13:39:40,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-08 13:39:40,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-08 13:39:40,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.04 01:39:39" (1/3) ... [2022-04-08 13:39:40,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8d061b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.04 01:39:40, skipping insertion in model container [2022-04-08 13:39:40,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.04 01:39:39" (2/3) ... [2022-04-08 13:39:40,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a8d061b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.04 01:39:40, skipping insertion in model container [2022-04-08 13:39:40,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.04 01:39:40" (3/3) ... [2022-04-08 13:39:40,152 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound1.c [2022-04-08 13:39:40,155 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-08 13:39:40,155 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-08 13:39:40,189 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-08 13:39:40,194 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-08 13:39:40,194 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-08 13:39:40,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-08 13:39:40,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-08 13:39:40,223 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 13:39:40,223 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 13:39:40,223 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 13:39:40,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 13:39:40,228 INFO L85 PathProgramCache]: Analyzing trace with hash 2009995470, now seen corresponding path program 1 times [2022-04-08 13:39:40,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 13:39:40,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [87369860] [2022-04-08 13:39:40,246 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-08 13:39:40,246 INFO L85 PathProgramCache]: Analyzing trace with hash 2009995470, now seen corresponding path program 2 times [2022-04-08 13:39:40,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 13:39:40,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763487776] [2022-04-08 13:39:40,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 13:39:40,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 13:39:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 13:39:40,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-08 13:39:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 13:39:40,527 INFO L290 TraceCheckUtils]: 0: Hoare triple {56#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(7, 2);call write~init~int(108, 2, 0, 1);call write~init~int(99, 2, 1, 1);call write~init~int(109, 2, 2, 1);call write~init~int(50, 2, 3, 1);call write~init~int(46, 2, 4, 1);call write~init~int(99, 2, 5, 1);call write~init~int(0, 2, 6, 1);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {35#true} is VALID [2022-04-08 13:39:40,528 INFO L290 TraceCheckUtils]: 1: Hoare triple {35#true} assume true; {35#true} is VALID [2022-04-08 13:39:40,528 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {35#true} {35#true} #73#return; {35#true} is VALID [2022-04-08 13:39:40,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-08 13:39:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 13:39:40,545 INFO L290 TraceCheckUtils]: 0: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-08 13:39:40,546 INFO L290 TraceCheckUtils]: 1: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-08 13:39:40,546 INFO L290 TraceCheckUtils]: 2: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-08 13:39:40,546 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {36#false} {35#true} #61#return; {36#false} is VALID [2022-04-08 13:39:40,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-08 13:39:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 13:39:40,567 INFO L290 TraceCheckUtils]: 0: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-08 13:39:40,568 INFO L290 TraceCheckUtils]: 1: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-08 13:39:40,568 INFO L290 TraceCheckUtils]: 2: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-08 13:39:40,569 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {36#false} {36#false} #63#return; {36#false} is VALID [2022-04-08 13:39:40,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-08 13:39:40,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 13:39:40,585 INFO L290 TraceCheckUtils]: 0: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-08 13:39:40,586 INFO L290 TraceCheckUtils]: 1: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-08 13:39:40,586 INFO L290 TraceCheckUtils]: 2: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-08 13:39:40,586 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {36#false} {36#false} #65#return; {36#false} is VALID [2022-04-08 13:39:40,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-08 13:39:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 13:39:40,597 INFO L290 TraceCheckUtils]: 0: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-08 13:39:40,598 INFO L290 TraceCheckUtils]: 1: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-08 13:39:40,599 INFO L290 TraceCheckUtils]: 2: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-08 13:39:40,599 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {36#false} {36#false} #67#return; {36#false} is VALID [2022-04-08 13:39:40,600 INFO L272 TraceCheckUtils]: 0: Hoare triple {35#true} call ULTIMATE.init(); {56#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-08 13:39:40,600 INFO L290 TraceCheckUtils]: 1: Hoare triple {56#(and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(7, 2);call write~init~int(108, 2, 0, 1);call write~init~int(99, 2, 1, 1);call write~init~int(109, 2, 2, 1);call write~init~int(50, 2, 3, 1);call write~init~int(46, 2, 4, 1);call write~init~int(99, 2, 5, 1);call write~init~int(0, 2, 6, 1);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {35#true} is VALID [2022-04-08 13:39:40,601 INFO L290 TraceCheckUtils]: 2: Hoare triple {35#true} assume true; {35#true} is VALID [2022-04-08 13:39:40,601 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {35#true} {35#true} #73#return; {35#true} is VALID [2022-04-08 13:39:40,601 INFO L272 TraceCheckUtils]: 4: Hoare triple {35#true} call #t~ret7 := main(); {35#true} is VALID [2022-04-08 13:39:40,601 INFO L290 TraceCheckUtils]: 5: Hoare triple {35#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~u~0;havoc ~v~0;~a~0 := #t~nondet4;havoc #t~nondet4;~b~0 := #t~nondet5;havoc #t~nondet5; {35#true} is VALID [2022-04-08 13:39:40,601 INFO L272 TraceCheckUtils]: 6: Hoare triple {35#true} call assume_abort_if_not((if ~a~0 % 4294967296 >= 1 then 1 else 0)); {35#true} is VALID [2022-04-08 13:39:40,602 INFO L290 TraceCheckUtils]: 7: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-08 13:39:40,602 INFO L290 TraceCheckUtils]: 8: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-08 13:39:40,602 INFO L290 TraceCheckUtils]: 9: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-08 13:39:40,603 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {36#false} {35#true} #61#return; {36#false} is VALID [2022-04-08 13:39:40,603 INFO L272 TraceCheckUtils]: 11: Hoare triple {36#false} call assume_abort_if_not((if ~b~0 % 4294967296 >= 1 then 1 else 0)); {35#true} is VALID [2022-04-08 13:39:40,603 INFO L290 TraceCheckUtils]: 12: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-08 13:39:40,605 INFO L290 TraceCheckUtils]: 13: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-08 13:39:40,605 INFO L290 TraceCheckUtils]: 14: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-08 13:39:40,605 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {36#false} {36#false} #63#return; {36#false} is VALID [2022-04-08 13:39:40,606 INFO L272 TraceCheckUtils]: 16: Hoare triple {36#false} call assume_abort_if_not((if ~a~0 % 4294967296 <= 65535 then 1 else 0)); {35#true} is VALID [2022-04-08 13:39:40,606 INFO L290 TraceCheckUtils]: 17: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-08 13:39:40,607 INFO L290 TraceCheckUtils]: 18: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-08 13:39:40,608 INFO L290 TraceCheckUtils]: 19: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-08 13:39:40,608 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {36#false} {36#false} #65#return; {36#false} is VALID [2022-04-08 13:39:40,608 INFO L272 TraceCheckUtils]: 21: Hoare triple {36#false} call assume_abort_if_not((if ~b~0 % 4294967296 <= 65535 then 1 else 0)); {35#true} is VALID [2022-04-08 13:39:40,608 INFO L290 TraceCheckUtils]: 22: Hoare triple {35#true} ~cond := #in~cond; {35#true} is VALID [2022-04-08 13:39:40,611 INFO L290 TraceCheckUtils]: 23: Hoare triple {35#true} assume 0 == ~cond;assume false; {36#false} is VALID [2022-04-08 13:39:40,611 INFO L290 TraceCheckUtils]: 24: Hoare triple {36#false} assume true; {36#false} is VALID [2022-04-08 13:39:40,612 INFO L284 TraceCheckUtils]: 25: Hoare quadruple {36#false} {36#false} #67#return; {36#false} is VALID [2022-04-08 13:39:40,612 INFO L290 TraceCheckUtils]: 26: Hoare triple {36#false} ~x~0 := ~a~0;~y~0 := ~b~0;~u~0 := ~b~0;~v~0 := ~a~0; {36#false} is VALID [2022-04-08 13:39:40,612 INFO L290 TraceCheckUtils]: 27: Hoare triple {36#false} assume !true; {36#false} is VALID [2022-04-08 13:39:40,612 INFO L272 TraceCheckUtils]: 28: Hoare triple {36#false} call __VERIFIER_assert((if (~x~0 * ~u~0 + ~y~0 * ~v~0) % 4294967296 == 2 * ~a~0 * ~b~0 % 4294967296 then 1 else 0)); {36#false} is VALID [2022-04-08 13:39:40,613 INFO L290 TraceCheckUtils]: 29: Hoare triple {36#false} ~cond := #in~cond; {36#false} is VALID [2022-04-08 13:39:40,613 INFO L290 TraceCheckUtils]: 30: Hoare triple {36#false} assume 0 == ~cond; {36#false} is VALID [2022-04-08 13:39:40,613 INFO L290 TraceCheckUtils]: 31: Hoare triple {36#false} assume !false; {36#false} is VALID [2022-04-08 13:39:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-08 13:39:40,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 13:39:40,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763487776] [2022-04-08 13:39:40,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763487776] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 13:39:40,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 13:39:40,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-08 13:39:40,618 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 13:39:40,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [87369860] [2022-04-08 13:39:40,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [87369860] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 13:39:40,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 13:39:40,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-08 13:39:40,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640947490] [2022-04-08 13:39:40,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 13:39:40,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-04-08 13:39:40,626 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 13:39:40,628 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-08 13:39:40,680 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 23 edges. 23 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 13:39:40,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-08 13:39:40,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 13:39:40,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-08 13:39:40,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-08 13:39:40,713 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-08 13:39:40,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 13:39:40,896 INFO L93 Difference]: Finished difference Result 58 states and 82 transitions. [2022-04-08 13:39:40,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-08 13:39:40,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-04-08 13:39:40,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 13:39:40,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-08 13:39:40,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2022-04-08 13:39:40,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-08 13:39:40,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2022-04-08 13:39:40,912 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 82 transitions. [2022-04-08 13:39:40,996 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 82 edges. 82 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 13:39:41,003 INFO L225 Difference]: With dead ends: 58 [2022-04-08 13:39:41,004 INFO L226 Difference]: Without dead ends: 28 [2022-04-08 13:39:41,006 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-08 13:39:41,009 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-08 13:39:41,010 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 37 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-08 13:39:41,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-08 13:39:41,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-04-08 13:39:41,035 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 13:39:41,036 INFO L82 GeneralOperation]: Start isEquivalent. First operand 28 states. Second operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 13:39:41,037 INFO L74 IsIncluded]: Start isIncluded. First operand 28 states. Second operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 13:39:41,037 INFO L87 Difference]: Start difference. First operand 28 states. Second operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 13:39:41,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 13:39:41,041 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-04-08 13:39:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-04-08 13:39:41,042 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 13:39:41,042 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 13:39:41,042 INFO L74 IsIncluded]: Start isIncluded. First operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 28 states. [2022-04-08 13:39:41,043 INFO L87 Difference]: Start difference. First operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 28 states. [2022-04-08 13:39:41,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 13:39:41,046 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2022-04-08 13:39:41,046 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-04-08 13:39:41,047 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 13:39:41,047 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 13:39:41,047 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 13:39:41,047 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 13:39:41,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 13:39:41,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-04-08 13:39:41,051 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 32 [2022-04-08 13:39:41,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 13:39:41,051 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-04-08 13:39:41,052 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-08 13:39:41,052 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 27 states and 33 transitions. [2022-04-08 13:39:41,098 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 33 edges. 33 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 13:39:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-04-08 13:39:41,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-08 13:39:41,099 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 13:39:41,099 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 13:39:41,100 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-08 13:39:41,100 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 13:39:41,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 13:39:41,101 INFO L85 PathProgramCache]: Analyzing trace with hash -756409738, now seen corresponding path program 1 times [2022-04-08 13:39:41,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 13:39:41,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [634707036] [2022-04-08 13:39:41,102 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-08 13:39:41,102 INFO L85 PathProgramCache]: Analyzing trace with hash -756409738, now seen corresponding path program 2 times [2022-04-08 13:39:41,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 13:39:41,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625388782] [2022-04-08 13:39:41,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 13:39:41,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 13:39:41,126 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 13:39:41,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912511978] [2022-04-08 13:39:41,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-08 13:39:41,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 13:39:41,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 13:39:41,131 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-08 13:39:41,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-08 13:39:41,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-08 13:39:41,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 13:39:41,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-08 13:39:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 13:39:41,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 13:39:41,465 INFO L272 TraceCheckUtils]: 0: Hoare triple {285#true} call ULTIMATE.init(); {285#true} is VALID [2022-04-08 13:39:41,467 INFO L290 TraceCheckUtils]: 1: Hoare triple {285#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(7, 2);call write~init~int(108, 2, 0, 1);call write~init~int(99, 2, 1, 1);call write~init~int(109, 2, 2, 1);call write~init~int(50, 2, 3, 1);call write~init~int(46, 2, 4, 1);call write~init~int(99, 2, 5, 1);call write~init~int(0, 2, 6, 1);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,469 INFO L290 TraceCheckUtils]: 2: Hoare triple {293#(<= ~counter~0 0)} assume true; {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,469 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {293#(<= ~counter~0 0)} {285#true} #73#return; {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,470 INFO L272 TraceCheckUtils]: 4: Hoare triple {293#(<= ~counter~0 0)} call #t~ret7 := main(); {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,470 INFO L290 TraceCheckUtils]: 5: Hoare triple {293#(<= ~counter~0 0)} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~u~0;havoc ~v~0;~a~0 := #t~nondet4;havoc #t~nondet4;~b~0 := #t~nondet5;havoc #t~nondet5; {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,471 INFO L272 TraceCheckUtils]: 6: Hoare triple {293#(<= ~counter~0 0)} call assume_abort_if_not((if ~a~0 % 4294967296 >= 1 then 1 else 0)); {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,472 INFO L290 TraceCheckUtils]: 7: Hoare triple {293#(<= ~counter~0 0)} ~cond := #in~cond; {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,472 INFO L290 TraceCheckUtils]: 8: Hoare triple {293#(<= ~counter~0 0)} assume !(0 == ~cond); {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,473 INFO L290 TraceCheckUtils]: 9: Hoare triple {293#(<= ~counter~0 0)} assume true; {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,473 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {293#(<= ~counter~0 0)} {293#(<= ~counter~0 0)} #61#return; {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,474 INFO L272 TraceCheckUtils]: 11: Hoare triple {293#(<= ~counter~0 0)} call assume_abort_if_not((if ~b~0 % 4294967296 >= 1 then 1 else 0)); {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,474 INFO L290 TraceCheckUtils]: 12: Hoare triple {293#(<= ~counter~0 0)} ~cond := #in~cond; {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,475 INFO L290 TraceCheckUtils]: 13: Hoare triple {293#(<= ~counter~0 0)} assume !(0 == ~cond); {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,475 INFO L290 TraceCheckUtils]: 14: Hoare triple {293#(<= ~counter~0 0)} assume true; {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,476 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {293#(<= ~counter~0 0)} {293#(<= ~counter~0 0)} #63#return; {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,477 INFO L272 TraceCheckUtils]: 16: Hoare triple {293#(<= ~counter~0 0)} call assume_abort_if_not((if ~a~0 % 4294967296 <= 65535 then 1 else 0)); {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,477 INFO L290 TraceCheckUtils]: 17: Hoare triple {293#(<= ~counter~0 0)} ~cond := #in~cond; {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,478 INFO L290 TraceCheckUtils]: 18: Hoare triple {293#(<= ~counter~0 0)} assume !(0 == ~cond); {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,479 INFO L290 TraceCheckUtils]: 19: Hoare triple {293#(<= ~counter~0 0)} assume true; {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,479 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {293#(<= ~counter~0 0)} {293#(<= ~counter~0 0)} #65#return; {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,480 INFO L272 TraceCheckUtils]: 21: Hoare triple {293#(<= ~counter~0 0)} call assume_abort_if_not((if ~b~0 % 4294967296 <= 65535 then 1 else 0)); {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,480 INFO L290 TraceCheckUtils]: 22: Hoare triple {293#(<= ~counter~0 0)} ~cond := #in~cond; {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,481 INFO L290 TraceCheckUtils]: 23: Hoare triple {293#(<= ~counter~0 0)} assume !(0 == ~cond); {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,481 INFO L290 TraceCheckUtils]: 24: Hoare triple {293#(<= ~counter~0 0)} assume true; {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,482 INFO L284 TraceCheckUtils]: 25: Hoare quadruple {293#(<= ~counter~0 0)} {293#(<= ~counter~0 0)} #67#return; {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,483 INFO L290 TraceCheckUtils]: 26: Hoare triple {293#(<= ~counter~0 0)} ~x~0 := ~a~0;~y~0 := ~b~0;~u~0 := ~b~0;~v~0 := ~a~0; {293#(<= ~counter~0 0)} is VALID [2022-04-08 13:39:41,483 INFO L290 TraceCheckUtils]: 27: Hoare triple {293#(<= ~counter~0 0)} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {372#(<= |main_#t~post6| 0)} is VALID [2022-04-08 13:39:41,484 INFO L290 TraceCheckUtils]: 28: Hoare triple {372#(<= |main_#t~post6| 0)} assume !(#t~post6 < 1);havoc #t~post6; {286#false} is VALID [2022-04-08 13:39:41,484 INFO L272 TraceCheckUtils]: 29: Hoare triple {286#false} call __VERIFIER_assert((if (~x~0 * ~u~0 + ~y~0 * ~v~0) % 4294967296 == 2 * ~a~0 * ~b~0 % 4294967296 then 1 else 0)); {286#false} is VALID [2022-04-08 13:39:41,484 INFO L290 TraceCheckUtils]: 30: Hoare triple {286#false} ~cond := #in~cond; {286#false} is VALID [2022-04-08 13:39:41,485 INFO L290 TraceCheckUtils]: 31: Hoare triple {286#false} assume 0 == ~cond; {286#false} is VALID [2022-04-08 13:39:41,485 INFO L290 TraceCheckUtils]: 32: Hoare triple {286#false} assume !false; {286#false} is VALID [2022-04-08 13:39:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-08 13:39:41,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-08 13:39:41,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 13:39:41,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625388782] [2022-04-08 13:39:41,486 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 13:39:41,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912511978] [2022-04-08 13:39:41,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912511978] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 13:39:41,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 13:39:41,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-08 13:39:41,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 13:39:41,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [634707036] [2022-04-08 13:39:41,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [634707036] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 13:39:41,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 13:39:41,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-08 13:39:41,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078265264] [2022-04-08 13:39:41,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 13:39:41,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-08 13:39:41,489 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 13:39:41,490 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-08 13:39:41,514 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 13:39:41,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-08 13:39:41,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 13:39:41,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-08 13:39:41,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-08 13:39:41,516 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-08 13:39:41,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 13:39:41,622 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2022-04-08 13:39:41,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-08 13:39:41,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-08 13:39:41,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 13:39:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-08 13:39:41,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2022-04-08 13:39:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-08 13:39:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2022-04-08 13:39:41,628 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 4 states and 42 transitions. [2022-04-08 13:39:41,667 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 42 edges. 42 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 13:39:41,670 INFO L225 Difference]: With dead ends: 36 [2022-04-08 13:39:41,670 INFO L226 Difference]: Without dead ends: 29 [2022-04-08 13:39:41,671 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-08 13:39:41,674 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-08 13:39:41,678 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-08 13:39:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-08 13:39:41,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-08 13:39:41,703 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 13:39:41,704 INFO L82 GeneralOperation]: Start isEquivalent. First operand 29 states. Second operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 13:39:41,704 INFO L74 IsIncluded]: Start isIncluded. First operand 29 states. Second operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 13:39:41,705 INFO L87 Difference]: Start difference. First operand 29 states. Second operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 13:39:41,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 13:39:41,709 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-04-08 13:39:41,709 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-04-08 13:39:41,710 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 13:39:41,710 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 13:39:41,711 INFO L74 IsIncluded]: Start isIncluded. First operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 29 states. [2022-04-08 13:39:41,713 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand 29 states. [2022-04-08 13:39:41,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 13:39:41,717 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-04-08 13:39:41,717 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-04-08 13:39:41,721 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 13:39:41,722 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 13:39:41,722 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 13:39:41,722 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 13:39:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-08 13:39:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-04-08 13:39:41,728 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 33 [2022-04-08 13:39:41,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 13:39:41,728 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-04-08 13:39:41,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-08 13:39:41,729 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 29 states and 35 transitions. [2022-04-08 13:39:41,774 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 35 edges. 35 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 13:39:41,774 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-04-08 13:39:41,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-08 13:39:41,775 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 13:39:41,775 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 13:39:41,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-08 13:39:41,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 13:39:41,976 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 13:39:41,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 13:39:41,977 INFO L85 PathProgramCache]: Analyzing trace with hash -754622278, now seen corresponding path program 1 times [2022-04-08 13:39:41,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 13:39:41,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1891320293] [2022-04-08 13:39:41,978 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-08 13:39:41,978 INFO L85 PathProgramCache]: Analyzing trace with hash -754622278, now seen corresponding path program 2 times [2022-04-08 13:39:41,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 13:39:41,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102128221] [2022-04-08 13:39:41,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 13:39:41,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 13:39:42,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 13:39:42,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268214196] [2022-04-08 13:39:42,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-08 13:39:42,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 13:39:42,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 13:39:42,015 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-08 13:39:42,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-08 13:39:42,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-08 13:39:42,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-08 13:39:42,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-08 13:39:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-08 13:39:42,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-08 13:39:42,422 INFO L272 TraceCheckUtils]: 0: Hoare triple {575#true} call ULTIMATE.init(); {575#true} is VALID [2022-04-08 13:39:42,422 INFO L290 TraceCheckUtils]: 1: Hoare triple {575#true} #NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(7, 2);call write~init~int(108, 2, 0, 1);call write~init~int(99, 2, 1, 1);call write~init~int(109, 2, 2, 1);call write~init~int(50, 2, 3, 1);call write~init~int(46, 2, 4, 1);call write~init~int(99, 2, 5, 1);call write~init~int(0, 2, 6, 1);call #Ultimate.allocInit(12, 3);~counter~0 := 0; {575#true} is VALID [2022-04-08 13:39:42,422 INFO L290 TraceCheckUtils]: 2: Hoare triple {575#true} assume true; {575#true} is VALID [2022-04-08 13:39:42,422 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {575#true} {575#true} #73#return; {575#true} is VALID [2022-04-08 13:39:42,422 INFO L272 TraceCheckUtils]: 4: Hoare triple {575#true} call #t~ret7 := main(); {575#true} is VALID [2022-04-08 13:39:42,423 INFO L290 TraceCheckUtils]: 5: Hoare triple {575#true} havoc ~a~0;havoc ~b~0;havoc ~x~0;havoc ~y~0;havoc ~u~0;havoc ~v~0;~a~0 := #t~nondet4;havoc #t~nondet4;~b~0 := #t~nondet5;havoc #t~nondet5; {575#true} is VALID [2022-04-08 13:39:42,423 INFO L272 TraceCheckUtils]: 6: Hoare triple {575#true} call assume_abort_if_not((if ~a~0 % 4294967296 >= 1 then 1 else 0)); {575#true} is VALID [2022-04-08 13:39:42,423 INFO L290 TraceCheckUtils]: 7: Hoare triple {575#true} ~cond := #in~cond; {575#true} is VALID [2022-04-08 13:39:42,423 INFO L290 TraceCheckUtils]: 8: Hoare triple {575#true} assume !(0 == ~cond); {575#true} is VALID [2022-04-08 13:39:42,423 INFO L290 TraceCheckUtils]: 9: Hoare triple {575#true} assume true; {575#true} is VALID [2022-04-08 13:39:42,424 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {575#true} {575#true} #61#return; {575#true} is VALID [2022-04-08 13:39:42,424 INFO L272 TraceCheckUtils]: 11: Hoare triple {575#true} call assume_abort_if_not((if ~b~0 % 4294967296 >= 1 then 1 else 0)); {575#true} is VALID [2022-04-08 13:39:42,424 INFO L290 TraceCheckUtils]: 12: Hoare triple {575#true} ~cond := #in~cond; {575#true} is VALID [2022-04-08 13:39:42,424 INFO L290 TraceCheckUtils]: 13: Hoare triple {575#true} assume !(0 == ~cond); {575#true} is VALID [2022-04-08 13:39:42,424 INFO L290 TraceCheckUtils]: 14: Hoare triple {575#true} assume true; {575#true} is VALID [2022-04-08 13:39:42,424 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {575#true} {575#true} #63#return; {575#true} is VALID [2022-04-08 13:39:42,424 INFO L272 TraceCheckUtils]: 16: Hoare triple {575#true} call assume_abort_if_not((if ~a~0 % 4294967296 <= 65535 then 1 else 0)); {575#true} is VALID [2022-04-08 13:39:42,425 INFO L290 TraceCheckUtils]: 17: Hoare triple {575#true} ~cond := #in~cond; {575#true} is VALID [2022-04-08 13:39:42,425 INFO L290 TraceCheckUtils]: 18: Hoare triple {575#true} assume !(0 == ~cond); {575#true} is VALID [2022-04-08 13:39:42,425 INFO L290 TraceCheckUtils]: 19: Hoare triple {575#true} assume true; {575#true} is VALID [2022-04-08 13:39:42,425 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {575#true} {575#true} #65#return; {575#true} is VALID [2022-04-08 13:39:42,425 INFO L272 TraceCheckUtils]: 21: Hoare triple {575#true} call assume_abort_if_not((if ~b~0 % 4294967296 <= 65535 then 1 else 0)); {575#true} is VALID [2022-04-08 13:39:42,425 INFO L290 TraceCheckUtils]: 22: Hoare triple {575#true} ~cond := #in~cond; {575#true} is VALID [2022-04-08 13:39:42,426 INFO L290 TraceCheckUtils]: 23: Hoare triple {575#true} assume !(0 == ~cond); {575#true} is VALID [2022-04-08 13:39:42,426 INFO L290 TraceCheckUtils]: 24: Hoare triple {575#true} assume true; {575#true} is VALID [2022-04-08 13:39:42,426 INFO L284 TraceCheckUtils]: 25: Hoare quadruple {575#true} {575#true} #67#return; {575#true} is VALID [2022-04-08 13:39:42,427 INFO L290 TraceCheckUtils]: 26: Hoare triple {575#true} ~x~0 := ~a~0;~y~0 := ~b~0;~u~0 := ~b~0;~v~0 := ~a~0; {658#(and (= main_~a~0 main_~v~0) (= main_~b~0 main_~y~0) (= main_~b~0 main_~u~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 13:39:42,427 INFO L290 TraceCheckUtils]: 27: Hoare triple {658#(and (= main_~a~0 main_~v~0) (= main_~b~0 main_~y~0) (= main_~b~0 main_~u~0) (= main_~a~0 main_~x~0))} #t~post6 := ~counter~0;~counter~0 := 1 + #t~post6; {658#(and (= main_~a~0 main_~v~0) (= main_~b~0 main_~y~0) (= main_~b~0 main_~u~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 13:39:42,428 INFO L290 TraceCheckUtils]: 28: Hoare triple {658#(and (= main_~a~0 main_~v~0) (= main_~b~0 main_~y~0) (= main_~b~0 main_~u~0) (= main_~a~0 main_~x~0))} assume !!(#t~post6 < 1);havoc #t~post6; {658#(and (= main_~a~0 main_~v~0) (= main_~b~0 main_~y~0) (= main_~b~0 main_~u~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-08 13:39:42,429 INFO L272 TraceCheckUtils]: 29: Hoare triple {658#(and (= main_~a~0 main_~v~0) (= main_~b~0 main_~y~0) (= main_~b~0 main_~u~0) (= main_~a~0 main_~x~0))} call __VERIFIER_assert((if (~x~0 * ~u~0 + ~y~0 * ~v~0) % 4294967296 == 2 * ~a~0 * ~b~0 % 4294967296 then 1 else 0)); {668#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-08 13:39:42,429 INFO L290 TraceCheckUtils]: 30: Hoare triple {668#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {672#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-08 13:39:42,430 INFO L290 TraceCheckUtils]: 31: Hoare triple {672#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {576#false} is VALID [2022-04-08 13:39:42,430 INFO L290 TraceCheckUtils]: 32: Hoare triple {576#false} assume !false; {576#false} is VALID [2022-04-08 13:39:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-08 13:39:42,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-08 13:39:42,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-08 13:39:42,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102128221] [2022-04-08 13:39:42,431 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-08 13:39:42,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268214196] [2022-04-08 13:39:42,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268214196] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 13:39:42,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 13:39:42,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-08 13:39:42,431 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-08 13:39:42,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1891320293] [2022-04-08 13:39:42,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1891320293] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-08 13:39:42,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-08 13:39:42,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-08 13:39:42,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438626456] [2022-04-08 13:39:42,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-08 13:39:42,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-04-08 13:39:42,433 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-08 13:39:42,433 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-08 13:39:42,456 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 24 edges. 24 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 13:39:42,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-08 13:39:42,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-08 13:39:42,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-08 13:39:42,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-08 13:39:42,457 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-08 13:39:42,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 13:39:42,645 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-04-08 13:39:42,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-08 13:39:42,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-04-08 13:39:42,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-08 13:39:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-08 13:39:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2022-04-08 13:39:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-08 13:39:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2022-04-08 13:39:42,649 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 47 transitions. [2022-04-08 13:39:42,694 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 47 edges. 47 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 13:39:42,695 INFO L225 Difference]: With dead ends: 39 [2022-04-08 13:39:42,695 INFO L226 Difference]: Without dead ends: 36 [2022-04-08 13:39:42,696 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-08 13:39:42,697 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-08 13:39:42,697 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 96 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-08 13:39:42,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-08 13:39:42,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-04-08 13:39:42,715 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-08 13:39:42,715 INFO L82 GeneralOperation]: Start isEquivalent. First operand 36 states. Second operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-08 13:39:42,715 INFO L74 IsIncluded]: Start isIncluded. First operand 36 states. Second operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-08 13:39:42,716 INFO L87 Difference]: Start difference. First operand 36 states. Second operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-08 13:39:42,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 13:39:42,718 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-04-08 13:39:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-04-08 13:39:42,718 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 13:39:42,719 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 13:39:42,719 INFO L74 IsIncluded]: Start isIncluded. First operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand 36 states. [2022-04-08 13:39:42,719 INFO L87 Difference]: Start difference. First operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand 36 states. [2022-04-08 13:39:42,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-08 13:39:42,721 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-04-08 13:39:42,721 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-04-08 13:39:42,721 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-08 13:39:42,722 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-08 13:39:42,722 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-08 13:39:42,722 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-08 13:39:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-08 13:39:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-04-08 13:39:42,724 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 33 [2022-04-08 13:39:42,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-08 13:39:42,724 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-04-08 13:39:42,724 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-08 13:39:42,724 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 35 states and 41 transitions. [2022-04-08 13:39:42,766 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 41 edges. 41 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-08 13:39:42,766 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-04-08 13:39:42,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-08 13:39:42,771 INFO L491 BasicCegarLoop]: Found error trace [2022-04-08 13:39:42,771 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-08 13:39:42,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-08 13:39:42,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-08 13:39:42,975 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-08 13:39:42,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-08 13:39:42,976 INFO L85 PathProgramCache]: Analyzing trace with hash 756635198, now seen corresponding path program 1 times [2022-04-08 13:39:42,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-08 13:39:42,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1101783066] [2022-04-08 13:39:42,977 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-08 13:39:42,977 INFO L85 PathProgramCache]: Analyzing trace with hash 756635198, now seen corresponding path program 2 times [2022-04-08 13:39:42,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-08 13:39:42,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941882509] [2022-04-08 13:39:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-08 13:39:42,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-08 13:39:43,012 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-08 13:39:43,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5584875] [2022-04-08 13:39:43,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-08 13:39:43,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-08 13:39:43,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-08 13:39:43,014 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-08 13:39:43,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process