/usr/bin/java -ea -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench/lcm2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-e106359-m [2022-04-15 07:23:05,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-15 07:23:05,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-15 07:23:05,521 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-15 07:23:05,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-15 07:23:05,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-15 07:23:05,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-15 07:23:05,551 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-15 07:23:05,557 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-15 07:23:05,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-15 07:23:05,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-15 07:23:05,558 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-15 07:23:05,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-15 07:23:05,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-15 07:23:05,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-15 07:23:05,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-15 07:23:05,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-15 07:23:05,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-15 07:23:05,564 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-15 07:23:05,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-15 07:23:05,564 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-15 07:23:05,564 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-15 07:23:05,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-15 07:23:05,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-15 07:23:05,564 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-15 07:23:05,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-15 07:23:05,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 07:23:05,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-15 07:23:05,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-15 07:23:05,565 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-15 07:23:05,565 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-15 07:23:05,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-15 07:23:05,566 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-15 07:23:05,566 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-15 07:23:05,739 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-15 07:23:05,759 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-15 07:23:05,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-15 07:23:05,762 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-15 07:23:05,763 INFO L275 PluginConnector]: CDTParser initialized [2022-04-15 07:23:05,763 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/lcm2.c [2022-04-15 07:23:05,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10c0b6c3b/b2f08a2c2c094ca2bf93c021061b955f/FLAG0c6fa450a [2022-04-15 07:23:06,257 INFO L306 CDTParser]: Found 1 translation units. [2022-04-15 07:23:06,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/lcm2.c [2022-04-15 07:23:06,262 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10c0b6c3b/b2f08a2c2c094ca2bf93c021061b955f/FLAG0c6fa450a [2022-04-15 07:23:06,273 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10c0b6c3b/b2f08a2c2c094ca2bf93c021061b955f [2022-04-15 07:23:06,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-15 07:23:06,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-15 07:23:06,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-15 07:23:06,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-15 07:23:06,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-15 07:23:06,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 07:23:06" (1/1) ... [2022-04-15 07:23:06,294 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15cccea8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 07:23:06, skipping insertion in model container [2022-04-15 07:23:06,294 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.04 07:23:06" (1/1) ... [2022-04-15 07:23:06,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-15 07:23:06,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-15 07:23:06,467 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/lcm2.c[537,550] [2022-04-15 07:23:06,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 07:23:06,497 INFO L203 MainTranslator]: Completed pre-run [2022-04-15 07:23:06,510 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/lcm2.c[537,550] [2022-04-15 07:23:06,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-15 07:23:06,534 INFO L208 MainTranslator]: Completed translation [2022-04-15 07:23:06,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 07:23:06 WrapperNode [2022-04-15 07:23:06,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-15 07:23:06,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-15 07:23:06,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-15 07:23:06,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-15 07:23:06,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 07:23:06" (1/1) ... [2022-04-15 07:23:06,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 07:23:06" (1/1) ... [2022-04-15 07:23:06,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 07:23:06" (1/1) ... [2022-04-15 07:23:06,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 07:23:06" (1/1) ... [2022-04-15 07:23:06,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 07:23:06" (1/1) ... [2022-04-15 07:23:06,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 07:23:06" (1/1) ... [2022-04-15 07:23:06,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 07:23:06" (1/1) ... [2022-04-15 07:23:06,569 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-15 07:23:06,570 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-15 07:23:06,570 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-15 07:23:06,570 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-15 07:23:06,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 07:23:06" (1/1) ... [2022-04-15 07:23:06,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-15 07:23:06,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 07:23:06,621 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 07:23:06,635 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 07:23:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-15 07:23:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-15 07:23:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-15 07:23:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-15 07:23:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-15 07:23:06,655 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-15 07:23:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-15 07:23:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-15 07:23:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-15 07:23:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-15 07:23:06,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-04-15 07:23:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-15 07:23:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-15 07:23:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-15 07:23:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-15 07:23:06,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-15 07:23:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-15 07:23:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-15 07:23:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-15 07:23:06,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-15 07:23:06,707 INFO L234 CfgBuilder]: Building ICFG [2022-04-15 07:23:06,709 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-15 07:23:06,816 INFO L275 CfgBuilder]: Performing block encoding [2022-04-15 07:23:06,823 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-15 07:23:06,823 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-15 07:23:06,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 07:23:06 BoogieIcfgContainer [2022-04-15 07:23:06,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-15 07:23:06,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-15 07:23:06,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-15 07:23:06,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-15 07:23:06,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.04 07:23:06" (1/3) ... [2022-04-15 07:23:06,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700ccad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 07:23:06, skipping insertion in model container [2022-04-15 07:23:06,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.04 07:23:06" (2/3) ... [2022-04-15 07:23:06,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@700ccad0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 07:23:06, skipping insertion in model container [2022-04-15 07:23:06,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 07:23:06" (3/3) ... [2022-04-15 07:23:06,830 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2.c [2022-04-15 07:23:06,833 INFO L202 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-15 07:23:06,833 INFO L161 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-15 07:23:06,862 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-15 07:23:06,866 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 07:23:06,867 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-15 07:23:06,899 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-15 07:23:06,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-15 07:23:06,905 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 07:23:06,905 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 07:23:06,906 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 07:23:06,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 07:23:06,919 INFO L85 PathProgramCache]: Analyzing trace with hash 656971502, now seen corresponding path program 1 times [2022-04-15 07:23:06,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 07:23:06,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2049384294] [2022-04-15 07:23:06,935 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 07:23:06,936 INFO L85 PathProgramCache]: Analyzing trace with hash 656971502, now seen corresponding path program 2 times [2022-04-15 07:23:06,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 07:23:06,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342400973] [2022-04-15 07:23:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 07:23:06,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 07:23:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 07:23:07,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-15 07:23:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 07:23:07,146 INFO L290 TraceCheckUtils]: 0: Hoare triple {55#(and (= |#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); {34#true} is VALID [2022-04-15 07:23:07,146 INFO L290 TraceCheckUtils]: 1: Hoare triple {34#true} assume true; {34#true} is VALID [2022-04-15 07:23:07,147 INFO L284 TraceCheckUtils]: 2: Hoare quadruple {34#true} {34#true} #72#return; {34#true} is VALID [2022-04-15 07:23:07,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-15 07:23:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 07:23:07,161 INFO L290 TraceCheckUtils]: 0: Hoare triple {34#true} ~cond := #in~cond; {34#true} is VALID [2022-04-15 07:23:07,161 INFO L290 TraceCheckUtils]: 1: Hoare triple {34#true} assume 0 == ~cond;assume false; {35#false} is VALID [2022-04-15 07:23:07,162 INFO L290 TraceCheckUtils]: 2: Hoare triple {35#false} assume true; {35#false} is VALID [2022-04-15 07:23:07,162 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {35#false} {34#true} #60#return; {35#false} is VALID [2022-04-15 07:23:07,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-15 07:23:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 07:23:07,182 INFO L290 TraceCheckUtils]: 0: Hoare triple {34#true} ~cond := #in~cond; {34#true} is VALID [2022-04-15 07:23:07,183 INFO L290 TraceCheckUtils]: 1: Hoare triple {34#true} assume 0 == ~cond;assume false; {35#false} is VALID [2022-04-15 07:23:07,183 INFO L290 TraceCheckUtils]: 2: Hoare triple {35#false} assume true; {35#false} is VALID [2022-04-15 07:23:07,184 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {35#false} {35#false} #62#return; {35#false} is VALID [2022-04-15 07:23:07,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-15 07:23:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 07:23:07,192 INFO L290 TraceCheckUtils]: 0: Hoare triple {34#true} ~cond := #in~cond; {34#true} is VALID [2022-04-15 07:23:07,193 INFO L290 TraceCheckUtils]: 1: Hoare triple {34#true} assume 0 == ~cond;assume false; {35#false} is VALID [2022-04-15 07:23:07,193 INFO L290 TraceCheckUtils]: 2: Hoare triple {35#false} assume true; {35#false} is VALID [2022-04-15 07:23:07,193 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {35#false} {35#false} #64#return; {35#false} is VALID [2022-04-15 07:23:07,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-15 07:23:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 07:23:07,204 INFO L290 TraceCheckUtils]: 0: Hoare triple {34#true} ~cond := #in~cond; {34#true} is VALID [2022-04-15 07:23:07,205 INFO L290 TraceCheckUtils]: 1: Hoare triple {34#true} assume 0 == ~cond;assume false; {35#false} is VALID [2022-04-15 07:23:07,205 INFO L290 TraceCheckUtils]: 2: Hoare triple {35#false} assume true; {35#false} is VALID [2022-04-15 07:23:07,206 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {35#false} {35#false} #66#return; {35#false} is VALID [2022-04-15 07:23:07,207 INFO L272 TraceCheckUtils]: 0: Hoare triple {34#true} call ULTIMATE.init(); {55#(and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|))} is VALID [2022-04-15 07:23:07,207 INFO L290 TraceCheckUtils]: 1: Hoare triple {55#(and (= |#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); {34#true} is VALID [2022-04-15 07:23:07,207 INFO L290 TraceCheckUtils]: 2: Hoare triple {34#true} assume true; {34#true} is VALID [2022-04-15 07:23:07,208 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {34#true} {34#true} #72#return; {34#true} is VALID [2022-04-15 07:23:07,208 INFO L272 TraceCheckUtils]: 4: Hoare triple {34#true} call #t~ret6 := main(); {34#true} is VALID [2022-04-15 07:23:07,208 INFO L290 TraceCheckUtils]: 5: Hoare triple {34#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; {34#true} is VALID [2022-04-15 07:23:07,208 INFO L272 TraceCheckUtils]: 6: Hoare triple {34#true} call assume_abort_if_not((if ~a~0 % 4294967296 >= 1 then 1 else 0)); {34#true} is VALID [2022-04-15 07:23:07,209 INFO L290 TraceCheckUtils]: 7: Hoare triple {34#true} ~cond := #in~cond; {34#true} is VALID [2022-04-15 07:23:07,211 INFO L290 TraceCheckUtils]: 8: Hoare triple {34#true} assume 0 == ~cond;assume false; {35#false} is VALID [2022-04-15 07:23:07,211 INFO L290 TraceCheckUtils]: 9: Hoare triple {35#false} assume true; {35#false} is VALID [2022-04-15 07:23:07,211 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {35#false} {34#true} #60#return; {35#false} is VALID [2022-04-15 07:23:07,211 INFO L272 TraceCheckUtils]: 11: Hoare triple {35#false} call assume_abort_if_not((if ~b~0 % 4294967296 >= 1 then 1 else 0)); {34#true} is VALID [2022-04-15 07:23:07,212 INFO L290 TraceCheckUtils]: 12: Hoare triple {34#true} ~cond := #in~cond; {34#true} is VALID [2022-04-15 07:23:07,213 INFO L290 TraceCheckUtils]: 13: Hoare triple {34#true} assume 0 == ~cond;assume false; {35#false} is VALID [2022-04-15 07:23:07,213 INFO L290 TraceCheckUtils]: 14: Hoare triple {35#false} assume true; {35#false} is VALID [2022-04-15 07:23:07,213 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {35#false} {35#false} #62#return; {35#false} is VALID [2022-04-15 07:23:07,213 INFO L272 TraceCheckUtils]: 16: Hoare triple {35#false} call assume_abort_if_not((if ~a~0 % 4294967296 <= 65535 then 1 else 0)); {34#true} is VALID [2022-04-15 07:23:07,214 INFO L290 TraceCheckUtils]: 17: Hoare triple {34#true} ~cond := #in~cond; {34#true} is VALID [2022-04-15 07:23:07,214 INFO L290 TraceCheckUtils]: 18: Hoare triple {34#true} assume 0 == ~cond;assume false; {35#false} is VALID [2022-04-15 07:23:07,214 INFO L290 TraceCheckUtils]: 19: Hoare triple {35#false} assume true; {35#false} is VALID [2022-04-15 07:23:07,215 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {35#false} {35#false} #64#return; {35#false} is VALID [2022-04-15 07:23:07,215 INFO L272 TraceCheckUtils]: 21: Hoare triple {35#false} call assume_abort_if_not((if ~b~0 % 4294967296 <= 65535 then 1 else 0)); {34#true} is VALID [2022-04-15 07:23:07,215 INFO L290 TraceCheckUtils]: 22: Hoare triple {34#true} ~cond := #in~cond; {34#true} is VALID [2022-04-15 07:23:07,216 INFO L290 TraceCheckUtils]: 23: Hoare triple {34#true} assume 0 == ~cond;assume false; {35#false} is VALID [2022-04-15 07:23:07,217 INFO L290 TraceCheckUtils]: 24: Hoare triple {35#false} assume true; {35#false} is VALID [2022-04-15 07:23:07,217 INFO L284 TraceCheckUtils]: 25: Hoare quadruple {35#false} {35#false} #66#return; {35#false} is VALID [2022-04-15 07:23:07,217 INFO L290 TraceCheckUtils]: 26: Hoare triple {35#false} ~x~0 := ~a~0;~y~0 := ~b~0;~u~0 := ~b~0;~v~0 := ~a~0; {35#false} is VALID [2022-04-15 07:23:07,218 INFO L290 TraceCheckUtils]: 27: Hoare triple {35#false} assume !true; {35#false} is VALID [2022-04-15 07:23:07,218 INFO L272 TraceCheckUtils]: 28: Hoare triple {35#false} call __VERIFIER_assert((if (~x~0 * ~u~0 + ~y~0 * ~v~0) % 4294967296 == 2 * ~a~0 * ~b~0 % 4294967296 then 1 else 0)); {35#false} is VALID [2022-04-15 07:23:07,221 INFO L290 TraceCheckUtils]: 29: Hoare triple {35#false} ~cond := #in~cond; {35#false} is VALID [2022-04-15 07:23:07,221 INFO L290 TraceCheckUtils]: 30: Hoare triple {35#false} assume 0 == ~cond; {35#false} is VALID [2022-04-15 07:23:07,221 INFO L290 TraceCheckUtils]: 31: Hoare triple {35#false} assume !false; {35#false} is VALID [2022-04-15 07:23:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-15 07:23:07,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 07:23:07,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342400973] [2022-04-15 07:23:07,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342400973] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 07:23:07,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 07:23:07,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-15 07:23:07,227 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 07:23:07,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2049384294] [2022-04-15 07:23:07,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2049384294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 07:23:07,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 07:23:07,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-15 07:23:07,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049606919] [2022-04-15 07:23:07,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 07:23:07,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-04-15 07:23:07,235 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 07:23:07,238 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-15 07:23:07,274 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 23 edges. 23 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 07:23:07,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-15 07:23:07,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 07:23:07,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-15 07:23:07,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-15 07:23:07,304 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-15 07:23:07,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 07:23:07,447 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2022-04-15 07:23:07,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-15 07:23:07,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-04-15 07:23:07,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 07:23:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-15 07:23:07,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2022-04-15 07:23:07,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-15 07:23:07,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2022-04-15 07:23:07,464 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 3 states and 78 transitions. [2022-04-15 07:23:07,546 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 78 edges. 78 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 07:23:07,553 INFO L225 Difference]: With dead ends: 55 [2022-04-15 07:23:07,553 INFO L226 Difference]: Without dead ends: 26 [2022-04-15 07:23:07,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-15 07:23:07,557 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-15 07:23:07,558 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-15 07:23:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-15 07:23:07,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-15 07:23:07,584 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 07:23:07,585 INFO L82 GeneralOperation]: Start isEquivalent. First operand 26 states. Second operand has 26 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-15 07:23:07,585 INFO L74 IsIncluded]: Start isIncluded. First operand 26 states. Second operand has 26 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-15 07:23:07,586 INFO L87 Difference]: Start difference. First operand 26 states. Second operand has 26 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-15 07:23:07,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 07:23:07,589 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-04-15 07:23:07,589 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-04-15 07:23:07,590 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 07:23:07,590 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 07:23:07,590 INFO L74 IsIncluded]: Start isIncluded. First operand has 26 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 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 26 states. [2022-04-15 07:23:07,591 INFO L87 Difference]: Start difference. First operand has 26 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 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 26 states. [2022-04-15 07:23:07,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 07:23:07,594 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-04-15 07:23:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-04-15 07:23:07,595 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 07:23:07,595 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 07:23:07,595 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 07:23:07,595 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 07:23:07,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-15 07:23:07,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-04-15 07:23:07,599 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 32 [2022-04-15 07:23:07,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 07:23:07,599 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-04-15 07:23:07,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-15 07:23:07,600 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 26 states and 31 transitions. [2022-04-15 07:23:07,631 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 31 edges. 31 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 07:23:07,631 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-04-15 07:23:07,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-15 07:23:07,632 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 07:23:07,632 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 07:23:07,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-15 07:23:07,633 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 07:23:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 07:23:07,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1510033502, now seen corresponding path program 1 times [2022-04-15 07:23:07,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 07:23:07,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1035568513] [2022-04-15 07:23:07,634 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 07:23:07,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1510033502, now seen corresponding path program 2 times [2022-04-15 07:23:07,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 07:23:07,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765662967] [2022-04-15 07:23:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 07:23:07,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 07:23:07,664 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 07:23:07,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724349455] [2022-04-15 07:23:07,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 07:23:07,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 07:23:07,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 07:23:07,666 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 07:23:07,677 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 07:23:07,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-15 07:23:07,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-15 07:23:07,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-15 07:23:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-15 07:23:07,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-15 07:23:08,166 INFO L272 TraceCheckUtils]: 0: Hoare triple {272#true} call ULTIMATE.init(); {272#true} is VALID [2022-04-15 07:23:08,166 INFO L290 TraceCheckUtils]: 1: Hoare triple {272#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); {272#true} is VALID [2022-04-15 07:23:08,166 INFO L290 TraceCheckUtils]: 2: Hoare triple {272#true} assume true; {272#true} is VALID [2022-04-15 07:23:08,166 INFO L284 TraceCheckUtils]: 3: Hoare quadruple {272#true} {272#true} #72#return; {272#true} is VALID [2022-04-15 07:23:08,166 INFO L272 TraceCheckUtils]: 4: Hoare triple {272#true} call #t~ret6 := main(); {272#true} is VALID [2022-04-15 07:23:08,167 INFO L290 TraceCheckUtils]: 5: Hoare triple {272#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; {272#true} is VALID [2022-04-15 07:23:08,167 INFO L272 TraceCheckUtils]: 6: Hoare triple {272#true} call assume_abort_if_not((if ~a~0 % 4294967296 >= 1 then 1 else 0)); {272#true} is VALID [2022-04-15 07:23:08,167 INFO L290 TraceCheckUtils]: 7: Hoare triple {272#true} ~cond := #in~cond; {272#true} is VALID [2022-04-15 07:23:08,167 INFO L290 TraceCheckUtils]: 8: Hoare triple {272#true} assume !(0 == ~cond); {272#true} is VALID [2022-04-15 07:23:08,167 INFO L290 TraceCheckUtils]: 9: Hoare triple {272#true} assume true; {272#true} is VALID [2022-04-15 07:23:08,167 INFO L284 TraceCheckUtils]: 10: Hoare quadruple {272#true} {272#true} #60#return; {272#true} is VALID [2022-04-15 07:23:08,168 INFO L272 TraceCheckUtils]: 11: Hoare triple {272#true} call assume_abort_if_not((if ~b~0 % 4294967296 >= 1 then 1 else 0)); {272#true} is VALID [2022-04-15 07:23:08,168 INFO L290 TraceCheckUtils]: 12: Hoare triple {272#true} ~cond := #in~cond; {272#true} is VALID [2022-04-15 07:23:08,168 INFO L290 TraceCheckUtils]: 13: Hoare triple {272#true} assume !(0 == ~cond); {272#true} is VALID [2022-04-15 07:23:08,168 INFO L290 TraceCheckUtils]: 14: Hoare triple {272#true} assume true; {272#true} is VALID [2022-04-15 07:23:08,168 INFO L284 TraceCheckUtils]: 15: Hoare quadruple {272#true} {272#true} #62#return; {272#true} is VALID [2022-04-15 07:23:08,168 INFO L272 TraceCheckUtils]: 16: Hoare triple {272#true} call assume_abort_if_not((if ~a~0 % 4294967296 <= 65535 then 1 else 0)); {272#true} is VALID [2022-04-15 07:23:08,168 INFO L290 TraceCheckUtils]: 17: Hoare triple {272#true} ~cond := #in~cond; {272#true} is VALID [2022-04-15 07:23:08,169 INFO L290 TraceCheckUtils]: 18: Hoare triple {272#true} assume !(0 == ~cond); {272#true} is VALID [2022-04-15 07:23:08,169 INFO L290 TraceCheckUtils]: 19: Hoare triple {272#true} assume true; {272#true} is VALID [2022-04-15 07:23:08,169 INFO L284 TraceCheckUtils]: 20: Hoare quadruple {272#true} {272#true} #64#return; {272#true} is VALID [2022-04-15 07:23:08,169 INFO L272 TraceCheckUtils]: 21: Hoare triple {272#true} call assume_abort_if_not((if ~b~0 % 4294967296 <= 65535 then 1 else 0)); {272#true} is VALID [2022-04-15 07:23:08,169 INFO L290 TraceCheckUtils]: 22: Hoare triple {272#true} ~cond := #in~cond; {272#true} is VALID [2022-04-15 07:23:08,169 INFO L290 TraceCheckUtils]: 23: Hoare triple {272#true} assume !(0 == ~cond); {272#true} is VALID [2022-04-15 07:23:08,170 INFO L290 TraceCheckUtils]: 24: Hoare triple {272#true} assume true; {272#true} is VALID [2022-04-15 07:23:08,170 INFO L284 TraceCheckUtils]: 25: Hoare quadruple {272#true} {272#true} #66#return; {272#true} is VALID [2022-04-15 07:23:08,170 INFO L290 TraceCheckUtils]: 26: Hoare triple {272#true} ~x~0 := ~a~0;~y~0 := ~b~0;~u~0 := ~b~0;~v~0 := ~a~0; {355#(and (= main_~a~0 main_~v~0) (= main_~b~0 main_~y~0) (= main_~b~0 main_~u~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-15 07:23:08,171 INFO L290 TraceCheckUtils]: 27: Hoare triple {355#(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 !false; {355#(and (= main_~a~0 main_~v~0) (= main_~b~0 main_~y~0) (= main_~b~0 main_~u~0) (= main_~a~0 main_~x~0))} is VALID [2022-04-15 07:23:08,172 INFO L272 TraceCheckUtils]: 28: Hoare triple {355#(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)); {362#(<= 1 |__VERIFIER_assert_#in~cond|)} is VALID [2022-04-15 07:23:08,173 INFO L290 TraceCheckUtils]: 29: Hoare triple {362#(<= 1 |__VERIFIER_assert_#in~cond|)} ~cond := #in~cond; {366#(<= 1 __VERIFIER_assert_~cond)} is VALID [2022-04-15 07:23:08,173 INFO L290 TraceCheckUtils]: 30: Hoare triple {366#(<= 1 __VERIFIER_assert_~cond)} assume 0 == ~cond; {273#false} is VALID [2022-04-15 07:23:08,173 INFO L290 TraceCheckUtils]: 31: Hoare triple {273#false} assume !false; {273#false} is VALID [2022-04-15 07:23:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-15 07:23:08,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-15 07:23:08,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-15 07:23:08,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765662967] [2022-04-15 07:23:08,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-15 07:23:08,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724349455] [2022-04-15 07:23:08,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724349455] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 07:23:08,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 07:23:08,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 07:23:08,176 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-15 07:23:08,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1035568513] [2022-04-15 07:23:08,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1035568513] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-15 07:23:08,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-15 07:23:08,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-15 07:23:08,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971749144] [2022-04-15 07:23:08,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-15 07:23:08,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 32 [2022-04-15 07:23:08,177 INFO L84 Accepts]: Finished accepts. word is accepted. [2022-04-15 07:23:08,177 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-15 07:23:08,201 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 23 edges. 23 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 07:23:08,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-15 07:23:08,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-15 07:23:08,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-15 07:23:08,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-15 07:23:08,209 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-15 07:23:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 07:23:08,411 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-04-15 07:23:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-15 07:23:08,411 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 32 [2022-04-15 07:23:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-15 07:23:08,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-15 07:23:08,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2022-04-15 07:23:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-15 07:23:08,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2022-04-15 07:23:08,421 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 5 states and 44 transitions. [2022-04-15 07:23:08,464 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 07:23:08,468 INFO L225 Difference]: With dead ends: 37 [2022-04-15 07:23:08,468 INFO L226 Difference]: Without dead ends: 34 [2022-04-15 07:23:08,469 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 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 07:23:08,471 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 88 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 [2022-04-15 07:23:08,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 88 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-15 07:23:08,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-15 07:23:08,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-04-15 07:23:08,489 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2022-04-15 07:23:08,490 INFO L82 GeneralOperation]: Start isEquivalent. First operand 34 states. Second operand has 33 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-15 07:23:08,490 INFO L74 IsIncluded]: Start isIncluded. First operand 34 states. Second operand has 33 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-15 07:23:08,491 INFO L87 Difference]: Start difference. First operand 34 states. Second operand has 33 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-15 07:23:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 07:23:08,495 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-04-15 07:23:08,495 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-04-15 07:23:08,496 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 07:23:08,496 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 07:23:08,496 INFO L74 IsIncluded]: Start isIncluded. First operand has 33 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 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 34 states. [2022-04-15 07:23:08,498 INFO L87 Difference]: Start difference. First operand has 33 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 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 34 states. [2022-04-15 07:23:08,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-15 07:23:08,503 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-04-15 07:23:08,503 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-04-15 07:23:08,507 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-15 07:23:08,507 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2022-04-15 07:23:08,507 INFO L88 GeneralOperation]: Finished isEquivalent. [2022-04-15 07:23:08,507 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2022-04-15 07:23:08,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-15 07:23:08,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-04-15 07:23:08,513 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 32 [2022-04-15 07:23:08,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-15 07:23:08,513 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-04-15 07:23:08,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-15 07:23:08,514 INFO L86 InductivityCheck]: Starting inductivity check of a Floyd-Hoare automaton with 33 states and 38 transitions. [2022-04-15 07:23:08,568 INFO L122 InductivityCheck]: Floyd-Hoare automaton has 38 edges. 38 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2022-04-15 07:23:08,569 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-04-15 07:23:08,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-15 07:23:08,571 INFO L491 BasicCegarLoop]: Found error trace [2022-04-15 07:23:08,571 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-15 07:23:08,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-15 07:23:08,771 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 07:23:08,772 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-15 07:23:08,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-15 07:23:08,774 INFO L85 PathProgramCache]: Analyzing trace with hash 905413410, now seen corresponding path program 1 times [2022-04-15 07:23:08,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-15 07:23:08,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [529348932] [2022-04-15 07:23:08,774 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-15 07:23:08,774 INFO L85 PathProgramCache]: Analyzing trace with hash 905413410, now seen corresponding path program 2 times [2022-04-15 07:23:08,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-15 07:23:08,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139856632] [2022-04-15 07:23:08,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-15 07:23:08,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-15 07:23:08,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-15 07:23:08,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293437012] [2022-04-15 07:23:08,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-15 07:23:08,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-15 07:23:08,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-15 07:23:08,808 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 07:23:08,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process